**System Specification Changes for the WSR-88D Data Resolution and
Coverage Enhancements**

**Prepared by OST/SEC**

**WSR-88D Data Resolution and Coverage Enhancements System Specification
Changes**

**GENERAL NOTES:**

This is a compilation of efforts completed to date by OST. ROC, and
NSSL, and others suggesting changes to the WSR-88D System Specification
for the Data Resolution and Coverage Enhancements. The purpose of this
document is to describe System Specification level changes. The changes
described reflect the current understanding of requirements.

These are the proposed changes to revision F of the WSR-88D System
Specification dated 28 April 2006.

The focus of this document is to identify the changes required in the
system specification.

1.  Language in the FROM: sections are the requirements before the
    modification for Data Resolution and Coverage Enhancements. Text in
    **Bold Font** are proposed changes since the last published System
    Specification.

**FROM:**

3.1.1.2.1 [Base Data]{.underline}

Base data consist of the Doppler moments at the highest resolution
available from the signal processor (at least reflectivity, mean radial
velocity and spectrum width). The base products consist of reflectivity,
mean radial velocity, and radial velocity spectrum width (standard
deviation) estimates presented in a format suitable for display on a
color graphic display. The derived products provide processed radar
data, concentrated to provide large volumes and varieties of data in a
form suitable for display on color graphic displays and, to the extent
possible, requiring minimum interpretive effort. The alphanumeric
products provide processed radar data for users without a graphic
display capability. The derived data array products provide data in a
non-displayable format for transmission to systems external to the
WSR-88D System for further processing.

**TO:**

3.1.1.2.1 [Base Data]{.underline}

Base data consist of the Doppler moments at the **configured**
resolution available from the signal processor (at least reflectivity,
mean radial velocity and spectrum width).

**FROM:**

3.1.1.2.2 Radar Products

Product generation will be automated to the extent feasible. However, at
selected sites, an interactive display and data entry capability will be
available for human analysis of radar data and assistance in the
generation of certain radar products.

**TO:**

2.  [Radar Products]{.underline}

**The base products consist of reflectivity, mean radial velocity, and
radial velocity spectrum width (standard deviation) estimates presented
in a format suitable for display on a color graphic display. The derived
products provide processed radar data, concentrated to provide large
volumes and varieties of data in a form suitable for display on color
graphic displays and, to the extent possible, requiring minimum
interpretive effort. The alphanumeric products provide processed radar
data for users without a graphic display capability. The derived data
array products provide data in a non-displayable format for transmission
to systems external to the WSR-88D System for further processing.**

Product generation will be automated to the extent feasible. However, at
selected sites, an interactive display and data entry capability will be
available for human analysis of radar data and assistance in the
generation of certain radar products.

**FROM:**

3.2.1.6 [Data Processing Reserve]{.underline}

The equipment performing the RPG functions shall (1) have a processing
reserve such that when processing the full load requirements (defined in
Section 3.2.1.1) the utilization of each of the processing, addressable
memory (available to software not including the operating system), and
direct access mass storage functions, and removable storage functions
averaged over a volume scan time period, does not exceed the following:

  ---------------------------------------- ------------------------------
  RESOURCE                                 UTILIZATION

  Processing                               30%

  Addressable memory                       30%

  Mass Storage                             30%

  Removable Storage                        N/A (Note1)
  ---------------------------------------- ------------------------------

Note 1: The utilization averaged over a volume scan time period is not
reasonable when referring to removable storage since the functions
described in 3.2.1.8 typically do not occur in that time frame.

This reserve is based upon the anticipated increase, over the first
several years of operation, of resource requirements as indicated in the
Radar Product Generation Algorithm Survey and Analysis Report, June
1996.

**TO:**

3.2.1.6 [Data Processing Reserve]{.underline}

The equipment performing the RPG functions **when the hardware is
refreshed** shall (1) have a processing reserve such that when
processing the full load requirements (defined in Section 3.2.1.1) the
utilization of each of the processing, addressable memory (available to
software not including the operating system), and direct access mass
storage functions, and removable storage functions averaged over a
volume scan time period, does not exceed the following:

  ---------------------------------------- ------------------------------
  RESOURCE                                 UTILIZATION

  Processing                               30%

  Addressable memory                       30%

  Mass Storage                             30%

  Removable Storage                        N/A (Note1)
  ---------------------------------------- ------------------------------

Note 1: The utilization averaged over a volume scan time period is not
reasonable when referring to removable storage since the functions
described in 3.2.1.8 typically do not occur in that time frame.

This reserve is based upon the anticipated increase, over the first
several years of operation **after the hardware refresh**, of resource
requirements as indicated in the Radar Product Generation Algorithm
Survey and Analysis Report, June 1996.

The equipment performing the RDA functions when the hardware is
refreshed shall (2) have a processing reserve such that when processing
the full load requirements (defined in Section 3.2.1.1) the utilization
of each of the processing, addressable memory (available to software not
including the operating system), and direct access mass storage
functions, averaged over a volume scan time period, does not exceed the
following:

  ----------------------------------- -----------------------------------
  **RESOURCE**                        **UTILIZATION**

  **Processing**                      **30%**

  **Addressable memory**              **30%**

  **Mass Storage**                    **30%**
  ----------------------------------- -----------------------------------

**This reserve is based upon the anticipated increase, over the first
several years of operation after the hardware refresh.**

**FROM**:

3.7.1.1.1 [Range Unfolding]{.underline}

The WSR-88D shall (1) provide mean radial velocity and spectrum width
data processing with the accuracies specified in Section 3.7.2.2.3.1
over the unambiguous range interval of at least 115 km as defined by the
following equation:

R (Unambiguous Range) = [cT]{.underline}~s\
~ 2

where: T~s~ = Doppler Pulse Repetition Time (PRT)\
c = Speed of Light

##### A technique shall (2) be provided to present the mean radial velocity and spectrum width data at the correct range (range unfolding) to a minimum range of 230 km. See Section 3.7.2.2.1.1 for unambiguous range coverage. Data significantly contaminated due to overlaid weather echoes or ground clutter shall (3) be identified.

**TO:**

3.7.1.1.1 [Range Unfolding]{.underline}

The WSR-88D shall (1) provide mean radial velocity and spectrum width
data processing with the accuracies specified in Section 3.7.2.2.3.1
over the unambiguous range interval of at least 115 km as defined by the
following equation:

R (Unambiguous Range) = [cT]{.underline}~s~

2

where: T~s~ = Doppler Pulse Repetition Time (PRT)

c = Speed of Light

A technique shall (2) be provided to present the mean radial velocity
and spectrum width data at the correct range (range unfolding). **This
range shall (2a) be configurable** to a minimum range of 230 km or **a
minimum range of 300 km.** See Section 3.7.2.2.1.1 for unambiguous range
coverage. Data significantly contaminated due to overlaid echoes shall
(3) be identified.

**FROM:**

3.7.1.6.4.18 [Clutter Suppression Control]{.underline}

Through the MSCF, the capability shall (1) be provided, at a minimum,
to:

> a\. Define clutter suppression regions;
>
> b\. Modify the bypass clutter filter map;

c.  Select the operational bypass map.

d.  Initiate generation of the bypass map

The definition of clutter suppression regions shall (2) include the
capability to select the elevation angle(s), minimum and maximum ranges
and azimuths, notch width selection, and type of suppression. The notch
width selection shall (3) be one of the three levels of Doppler clutter
suppression capability from Table 3-17. The capability shall (4) be
provided to modify, through adaptation data, the selections in a, b, and
c above.

The bypass clutter filter map shall (5) consist of a site-specific
elevation angle independent clutter suppression map which specifies the
ranges and azimuths to be used for clutter suppression. This map applies
to both Doppler and reflectivity clutter suppression.

**TO:**

3.7.1.6.4.18 [Clutter Suppression Control]{.underline}

Through the MSCF, the capability shall (1) be provided, at a minimum,
to:

a.  Define clutter suppression regions;

b.  Initiate generation of the bypass map

The definition of clutter suppression regions shall (2) include the
capability to select the elevation angle(s), minimum and maximum ranges
and azimuths, notch width selection, and type of suppression. The notch
width selection shall (3) be one of the three levels of Doppler clutter
suppression capability from Table 3-17. The capability shall (4) be
provided to modify, through adaptation data, the selections in a, above.

The bypass clutter filter map shall (5) consist of a site-specific
elevation angle independent clutter suppression map which specifies the
ranges and azimuths to be used for clutter suppression. This map applies
to both Doppler and reflectivity clutter suppression.

**FROM:**

3.7.2.2.1.1.1 [Base Reflectivity]{.underline}

The RDA shall (1) provide quantitative reflectivity estimates over an
unambiguous range of 1 km to a minimum of 460 km (or up to a height of
70,000 ft MSL if this height occurs prior to reaching 460 km in
horizontal range). The quantitative reflectivity estimates from 2 km to
a minimum of 230 km shall (2) meet the accuracies specified in Section
3.7.2.2.3.2. The same signal processing scheme shall (3) be used to
provide all reflectivity estimates.

**TO:**

3.7.2.2.1.1.1 [Base Reflectivity]{.underline}

The RDA shall (1) provide quantitative reflectivity estimates over an
unambiguous range of 1 km to a minimum of 460 km (or up to a height of
70,000 ft MSL if this height occurs prior to reaching 460 km in
horizontal range). The quantitative reflectivity estimates from 2 km to
a minimum of 230 km shall (2) meet the accuracies specified in Section
3.7.2.2.3.2.

**FROM:**

3.7.2.2.2.1 [Azimuth Sample Interval]{.underline}

The RDA shall (1) provide an azimuth sample interval of greater than
0.953 degrees and less than 1.0555 degrees.

**TO:**

3.7.2.2.2.1 [Azimuth Sample Interval]{.underline}

The RDA shall (1) provide a **configurable** azimuth sample interval.
**The azimuth sample interval shall (2) be configurable to** ~~of~~
greater than 0.953 degrees and less than 1.0555 degrees **centered at
the half degree or greater than 0.477 degrees and less than 0.528
degrees centered on the quarter and three-quarter degree.**

[]{.mark}

**FROM:**

3.7.2.2.2.2 [Range Sample Interval]{.underline}

The RDA shall (1) provide a range sample interval of not greater than 1
km, from 1 km to 460 km, including the effects of range averaging, for
reflectivity measurements. The RDA shall (2) provide a range sample
interval of not greater than 250 meters for mean radial velocity and
spectrum width measurements from a range of 1 km to 230 km.

**TO:**

3.7.2.2.2.2 [Range Sample Interval]{.underline}

The RDA shall (1) provide a **configurable** range sample interval of
not greater than **250 m or** 1 km, from 1 km to 460 km, including the
effects of range averaging, for reflectivity measurements. The RDA shall
(2) provide a range sample interval of not greater than 250 meters for
mean radial velocity and spectrum width measurements from a configurable
range of 1 km to **300** km.

ADD:

###### **3.7.2.2.2.3 Effective Beam Width**

**For half-degree azimuth sample (3.7.2.2.2.1) mode of operation , the
effective beam width shall (1) be no larger than 1.10 degrees (half
power point). For one degree azimuth sample (3.7.2.2.2.1) mode of
operation , the effective beam width shall (2) be no larger than 1.50
degrees (half power point).**

**FROM:**

3.7.2.2.3.1 Mean Radial Velocity and Spectrum Width

For the range of possible dwell times (T~D~), the RDA shall (1) provide
estimates of mean radial velocity (V) and spectrum width (W) with the
following accuracy and precision:

TABLE 3-14 MEAN RADIAL VELOCITY AND SPECTRUM WIDTH

  ------------------- ---------------------------------- -----------------
                                                         

                      Accuracy                           Precision\
                                                         (Note 2)

  Mean Radial         For a true spectrum width (Note 1) 0.50 ms^-1^
  Velocity            of 4 ms^-1^ the standard deviation 
                      in the estimate of the mean radial 
                      velocity will be less than or      
                      equal to 1.0 ms^-1^ including      
                      quantization errors, for           
                      signal-to-noise ratio (SNR)        
                      greater than 8 dB.                 

  Spectrum Width      For a true spectrum width (Note 1) 0.50 ms^-1^
                      of 4 ms^-1^ the standard deviation 
                      in the estimate of the spectrum    
                      width will be less than or equal   
                      to 1.0 ms^-1^ including            
                      quantization errors, for SNR       
                      greater than 10 dB.                

  Note 1: True                                           
  spectrum width is                                      
  defined as one                                         
  standard deviation                                     
  of the                                                 
  meteorological                                         
  phenomenon spectrum                                    
  width within a                                         
  sampled volume for                                     
  which the indicated                                    
  accuracy applies.                                      
  Stated accuracy                                        
  values apply for                                       
  Nyquist velocities                                     
  of the system.                                         
  (Gaussian spectrum                                     
  assumed.)\                                             
  \                                                      
  Note 2: Precision                                      
  is defined as the                                      
  quantization, the                                      
  smallest resolvable                                    
  increment.\                                            
  \                                                      
  Note 3. Significant                                    
  biases introduced                                      
  by the                                                 
  computational                                          
  technique should be                                    
  minimized.                                             
  ------------------- ---------------------------------- -----------------

**TO:**

3.7.2.2.3.1 Mean Radial Velocity and Spectrum Width

For the range of possible dwell times (T~D~), the RDA shall (1) provide
estimates of mean radial velocity (V) and spectrum width (W) with the
following accuracy and precision **for all Azimuth Sample Intervals
specified in 3.7.2.2.2.1**:

TABLE 3-14 MEAN RADIAL VELOCITY AND SPECTRUM WIDTH

  ------------------- ---------------------------------- -----------------
                                                         

                      Accuracy                           Precision\
                                                         (Note 2)

  Mean Radial         For a true spectrum width (Note 1) 0.50 ms^-1^
  Velocity            of 4 ms^-1^ the standard deviation 
                      in the estimate of the mean radial 
                      velocity will be less than or      
                      equal to 1.0 ms^-1^ including      
                      quantization errors, for           
                      signal-to-noise ratio (SNR)        
                      greater than 8 dB.                 

  Spectrum Width      For a true spectrum width (Note 1) 0.50 ms^-1^
                      of 4 ms^-1^ the standard deviation 
                      in the estimate of the spectrum    
                      width will be less than or equal   
                      to 1.0 ms^-1^ including            
                      quantization errors, for SNR       
                      greater than 10 dB.                

  Note 1: True                                           
  spectrum width is                                      
  defined as one                                         
  standard deviation                                     
  of the                                                 
  meteorological                                         
  phenomenon spectrum                                    
  width within a                                         
  sampled volume for                                     
  which the indicated                                    
  accuracy applies.                                      
  Stated accuracy                                        
  values apply for                                       
  Nyquist velocities                                     
  of the system.                                         
  (Gaussian spectrum                                     
  assumed.)\                                             
  \                                                      
  Note 2: Precision                                      
  is defined as the                                      
  quantization, the                                      
  smallest resolvable                                    
  increment.\                                            
  \                                                      
  Note 3. Significant                                    
  biases introduced                                      
  by the                                                 
  computational                                          
  technique should be                                    
  minimized.                                             
  ------------------- ---------------------------------- -----------------

**FROM:**

3.7.2.2.3.2 [Reflectivity (Z)]{.underline}

For the reflectivity provided by the RDA, from 2 to 230km, the estimates
shall (1) be averaged over 1 km range bins. These reflectivity estimates
shall (2) meet the following accuracy and precision requirements:

TABLE 3-15 REFLECTIVITY (Z)

  ----------------- ----------------------------------- -----------------
                    Accuracy                            Precision\
                                                        (Note 2)

  Reflectivity(Z)   For a true spectrum width of 4      1 dB
                    ms^-1^ the standard deviation in    
                    the estimate of the reflectivity    
                    will be less than or equal to 1 dB  
                    at SNR [\>]{.underline} 10 dB       
                    (including only the error due to    
                    meteorological signal               
                    fluctuations).                      

  Note 1: Accuracy                                      
  is defined as one                                     
  standard                                              
  deviation (SD) of                                     
  the estimate,                                         
  including effects                                     
  of precision.\                                        
  \                                                     
  Note 2: Precision                                     
  is defined as the                                     
  quantization, the                                     
  smallest                                              
  resolvable                                            
  increment.                                            
  ----------------- ----------------------------------- -----------------

Automatic calibration shall (3) reduce system hardware drift errors to
less than 1 dB.

**TO:**

3.7.2.2.3.2 [Reflectivity (Z)]{.underline}

For the reflectivity provided by the RDA, from 2 to 230km, **all**
estimates shall (1) meet the following accuracy and precision
requirements **when averaged over 1 km for all Azimuth Sample Interval
as specified in 3.7.2.2.1**:

TABLE 3-15 REFLECTIVITY (Z)

  ----------------- ----------------------------------- -----------------
                    Accuracy                            Precision\
                                                        (Note 2)

  Reflectivity(Z)   For a true spectrum width of 4      1 dB
                    ms^-1^ the standard deviation in    
                    the estimate of the reflectivity    
                    will be less than or equal to 1 dB  
                    at SNR [\>]{.underline} 10 dB       
                    (including only the error due to    
                    meteorological signal               
                    fluctuations).                      

  Note 1: Accuracy                                      
  is defined as one                                     
  standard                                              
  deviation (SD) of                                     
  the estimate,                                         
  including effects                                     
  of precision.\                                        
  \                                                     
  Note 2: Precision                                     
  is defined as the                                     
  quantization, the                                     
  smallest                                              
  resolvable                                            
  increment.                                            
  ----------------- ----------------------------------- -----------------

Automatic calibration shall (3) reduce system hardware drift errors to
less than 1 dB.

**FROM:**

15. [Volume Coverage Pattern (VCP) Control]{.underline}

The capability to select the operational VCP from the set of defined
local and remote (adaptation data) VCP suites shall (1) be provided
(Note: "Local" scan strategies are stored in the RDA. "Remote" scan
strategies are stored in the RPG). The capability shall (2) be provided
to modify VCP parameters by elevation scan where appropriate. The
parameters shall (3) include, but are not limited to Doppler PRF
selection, SNR, sector definition, and velocity measurement increment.

**TO:**

3.7.3.4.15 [Volume Coverage Pattern (VCP) Control]{.underline}

The capability to select the operational VCP from the set of defined
local and remote (adaptation data) VCP suites shall (1) be provided
(Note: "Local" scan strategies are stored in the RDA. "Remote" scan
strategies are stored in the RPG). The capability shall (2) be provided
to modify VCP parameters by elevation scan where appropriate. The
parameters shall (3) include, but are not limited to Doppler PRF
selection, SNR, sector definition, and velocity measurement increment.
**The capability to display the current operational VCP shall (4) be
provided. The display shall (5) include but not limited to Doppler PRF
selection, SNR, sector definition, base data resolution and velocity
measurement increment.**

**ADD:**

**Appendix B Definitions**

**1.xx Effective Beam Width**

**Effective Beam Width is the azimuthal resolution of a combination of
the one-way antenna pattern, the azimuthal extent of the processed
receiver samples, and any applied data windowing. The Effective Beam is
computed by the convolution of the one-way antenna pattern with the
square of the data window as defined over the azimuthal extent of the
sample.**

**FROM:**

TABLE E-1a. PRODUCT GENERATION & ARCHIVE PERFORMANCE LOAD

+----------------+--------------+-----------+-----------------+------+
| **Product      | **Coverage** | **Res     | **Products**    | **A  |
| Name**         |              | olution** |                 | rchi |
|                |              |           |                 | ve** |
+================+==============+===========+=================+======+
| 1\.            | 0-230        | 1 x 1 °   | lowest 4 + 6.2, | lo   |
| Reflectivity   |              |           | 10.0, 14.0      | west |
|                |              |           |                 | 1    |
| Graphic        |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| Graphic        | 0-460        | 2 x 1 °   | lowest 3        | lo   |
|                |              |           |                 | west |
|                |              |           |                 | 1    |
+----------------+--------------+-----------+-----------------+------+
| Graphic        | 0-460        | 4 x 1 °   | None            |      |
+----------------+--------------+-----------+-----------------+------+
| Digital        | 0-460        | 1 x 1 °   | All elevations  | None |
+----------------+--------------+-----------+-----------------+------+
| 2\. Mean       | 0-60         | 0.25 x 1  | lowest 1        | lo   |
| Radial         |              | °         |                 | west |
| Velocity       |              |           |                 | 1    |
|                |              |           |                 |      |
| Graphic        |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| Graphic        | 0-115        | 0.5 x 1 ° | lowest 4 + 6.2, | lo   |
|                |              |           | 10.0            | west |
|                |              |           |                 | 1    |
+----------------+--------------+-----------+-----------------+------+
| Graphic        | 0-230        | 1 x 1 °   | 14 elevations   | lo   |
|                |              |           |                 | west |
|                |              |           |                 | 1    |
+----------------+--------------+-----------+-----------------+------+
| Digital        | 0-230        | 0.25 x 1  | All elevations  | None |
|                |              | °         |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 3\. Spectrum   | 0-60         | 0.25 x 1  | lowest 1        | lo   |
| Width          |              | °         |                 | west |
|                |              |           |                 | 1    |
+----------------+--------------+-----------+-----------------+------+
|                | 0-115        | 0.5 x 1 ° | None            |      |
+----------------+--------------+-----------+-----------------+------+
|                | 0-230        | 1 x 1     | lowest 4        | lo   |
|                |              |           |                 | west |
|                |              |           |                 | 1    |
+----------------+--------------+-----------+-----------------+------+
| 4\. Combined   | 230 x 230    | 1 x 1     | lowest 1        | None |
| Shear          |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 5\. Combined   | 230 x230     | 1 x 1     | No longer       |      |
| Shear Contour  |              |           | available       |      |
+----------------+--------------+-----------+-----------------+------+
| 6\. Composite  | 0-230        | 1 x 1     | 1 (16 lvl)\     | N    |
| Reflectivity   |              |           | 1 (8 lvl)       | one\ |
|                |              |           |                 | None |
+----------------+--------------+-----------+-----------------+------+
|                | 0-460        | 4 x 4     | 1 (16 lvl)\     | yes\ |
|                |              |           | 1 (8 lvl)       | yes  |
+----------------+--------------+-----------+-----------------+------+
| AP removed     | 0-230        | 1 x 1     | None            | None |
+----------------+--------------+-----------+-----------------+------+
| AP removed     | 0-460        | 4 x 4     | None            | None |
+----------------+--------------+-----------+-----------------+------+
| 7\. Composite  | 0-230        | 1 x 1     | No longer       |      |
| Reflectivity   |              |           | available       |      |
| Contour        |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
|                | 0-460        | 4 x 4     | No longer       |      |
|                |              |           | available       |      |
+----------------+--------------+-----------+-----------------+------+
| 8\. Echo Tops  | 0-230        | 4 x 4     | 1               | yes  |
+----------------+--------------+-----------+-----------------+------+
| 9\. Echo Tops  | 0-230        | 4 x 4     | No longer       | None |
| Contour        |              |           | available       |      |
+----------------+--------------+-----------+-----------------+------+
| 10\. Severe    | 50 x 50      | see       | None            |      |
| Weather        |              | product   |                 |      |
| Analysis\      |              | de        |                 |      |
| (4 Products):  |              | scription |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 11\. Severe    | 0-230        | 4 x 4     | 1 (with VIL)    | yes  |
| Weather        |              |           |                 |      |
| Probability    |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 12\. Velocity  |              | 1000 ft   | None            |      |
| Azimuth        |              | alt       |                 |      |
| Display VAD    |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| Wind Profile   |              | 1000 ft   | 1               | None |
|                |              | alt       |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 13\. Combined  | 25 x 25      |           | No longer       |      |
| Moment         |              |           | available       |      |
+----------------+--------------+-----------+-----------------+------+
| 14\. Cross     |              | 1 x 0.5   | 3               | None |
| Section (230km |              |           |                 |      |
| X 70k\')       |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 15\. Weak Echo | 50 x 50      | 1 x 1     | No longer       |      |
| Region         |              |           | available       |      |
+----------------+--------------+-----------+-----------------+------+
| 16\. Storm Rel | 50 x 50      | 0.5 x 1°  | 1               |      |
| Mean Radial    |              |           |                 |      |
| Vel Region     |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| Map            | 0-230        | 1 x 1°    | lowest 4 + 6.2, | lo   |
|                |              |           | 10.0, 14.0      | west |
|                |              |           |                 | 1    |
+----------------+--------------+-----------+-----------------+------+
| 17\.           | 0-230        | 4 x 4     | 1               | yes  |
| Vertically     |              |           |                 |      |
| Integrated     |              |           |                 |      |
| Liquid         |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 18\. Storm     | 0-460        | N/A       | 1               | yes  |
| Tracking       |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 19\. Hail      | 0-230        | N/A       | 1               | yes  |
| Detection      |              |           |                 |      |
| (Enhanced)     |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 20\.           | 0-230        | N/A       | 1               | yes  |
| Mesocyclone    |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| Mesocyclone    | 360 degrees  | N/A       | All Elevations  | None |
| Rapid Update   | x 124 nm     |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| Mesocyclone    | 0-230 km     | N/A       | 1               | None |
| Detection      |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| Mesocyclone    | 0-230        | N/A       | All Elevations  | None |
| Detection Data |              |           |                 |      |
| Array Product  |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| Digital        | 0-230 km     | N/A       | All Elevations  | None |
| Mesocyclone    |              |           |                 |      |
| Detection      |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 21\. Tornado   | 0-230        | N/A       | 1               | yes  |
| Vortex         |              |           |                 |      |
| Signature      |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| Tornado Vortex | 0-230 km     | N/A       | 1               | None |
| Signature      |              |           |                 |      |
| Rapid Update   |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 22\. Storm     | 0-460        | N/A       | 1               | None |
| Structure      |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 23\. Layer     |              |           |                 |      |
| Composite      |              |           |                 |      |
| Reflec         |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 33M-60M        | 460 x 460    | 4 x 4     | 1               | None |
+----------------+--------------+-----------+-----------------+------+
| 24M-33M        | 460 x 460    | 4 x 4     | 1               | None |
+----------------+--------------+-----------+-----------------+------+
| Sfc-24M        | 460 x 460    | 4 x 4     | 1               | None |
+----------------+--------------+-----------+-----------------+------+
| AP removed     | 460 x 460    | 4 x 4     | 1               | None |
| Sfc-24M        |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 24\. Layer     |              |           |                 |      |
| Composite Turb |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 33M-60M        | 300 x 300    | 4 x 4     | No longer       |      |
|                |              |           | available       |      |
+----------------+--------------+-----------+-----------------+------+
| 24M-33M        | 300 x 300    | 4 x 4     | No longer       |      |
|                |              |           | available       |      |
+----------------+--------------+-----------+-----------------+------+
| 25\. User      | N/A          | N/A       | 1               | yes  |
| Alert Message  |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 26\. Radar     | N/A          | N/A       | 1               | yes  |
| Coded Message  |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 27\. Free Text | N/A          | N/A       | 1               | None |
| Message        |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 28\. Sfc       | 0-230        | 2 x 1°    | 1               | yes  |
| Rainfall       |              |           |                 |      |
| Accumulation 1 |              |           |                 |      |
| hr             |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 3 hr           | 0-230        | 2 x 1°    | 1               | None |
+----------------+--------------+-----------+-----------------+------+
| 29\. Storm     | 0-230        | 2 x 1°    | 1               | yes  |
| Total Rainfall |              |           |                 |      |
| Accum          |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 30\. Hourly    | 0-230        | 1/40 LFM  | 1               | yes  |
| Digital Precip |              |           |                 |      |
| Array          |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 31\.           | N/A          | N/A       | 1               | yes  |
| Supplemental   |              |           |                 |      |
| Precipitation  |              |           |                 |      |
| Data           |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 32\. User      | 0-230        | 2 x 1°    | 1               | None |
| Selectable     |              |           |                 |      |
| Precip Accum   |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 33\. Hybrid    | 0-230\       | 1 x 1°\   | 1               | None |
| Reflectivity   | 0-230        | 2 x 1°    |                 |      |
|                |              |           |                 |      |
| \- Digital\    |              |           |                 |      |
| - Image        |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 34\. Clutter   | 0-230        | 1 km x    | 1               | Yes  |
| filter control |              | 1.4º      |                 |      |
|                |              | (Legacy   |                 |      |
|                |              | RDA)\     |                 |      |
|                |              | 1 km x    |                 |      |
|                |              | 1.0º      |                 |      |
|                |              | (Open     |                 |      |
|                |              | RDA)      |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 35\. ITWS      | 0-115        | 1 km x 1  | None            | None |
| Digital Base   |              | º         |                 |      |
| Velocity       |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 36\. Clutter   | 0-230        | 1 x 1°    | Lowest          | None |
| Likelihood     |              |           |                 |      |
| Reflectivity   |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 37\. Clutter   | 0-230        | 1 x 1°    | Lowest          | None |
| Likelihood     |              |           |                 |      |
| Doppler        |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 38\. SuperOb   | 0-230        | Default = | Default = 1 per | None |
|                | (adaptable,  | 5 x 6°    | hour (adaptable |      |
|                | de           | (a        | between 6 per   |      |
|                | fault=100km) | daptable) | hour and one    |      |
|                |              |           | every 3 hours)  |      |
+----------------+--------------+-----------+-----------------+------+
| 39\. High      | 0-460        | 1 x 1°    | 1               | Yes  |
| Resolution VIL |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 40\. User      | 360 degrees  | 1 degree  | None            | None |
| Selectable     | x 124 nm     | x 0.54 nm |                 |      |
| Layer          |              |           |                 |      |
| Composite      |              |           |                 |      |
| Reflectivity   |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 41\. Digital   | 0-345        | 1 x 1 °   | 1               | None |
| High           |              |           |                 |      |
| Resolution     |              |           |                 |      |
| Enhanced Echo  |              |           |                 |      |
| Tops           |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 42 One Hour    | 0-230        | 1 x 1     | 1               | None |
| Snow           |              |           |                 |      |
| Accumulation   |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 43\. Storm     | 0-230        | 1 x 1     | 1               | None |
| Total Snow     |              |           |                 |      |
| Accumulation   |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 44\. User      | 0-230        | 1 x 1     | 1               | None |
| Selectable     |              |           |                 |      |
| Snow           |              |           |                 |      |
| Accumulation   |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| Note: Total    |              |           |                 |      |
| product        |              |           |                 |      |
| generation is  |              |           |                 |      |
| depicted (both |              |           |                 |      |
| routine and    |              |           |                 |      |
| one time       |              |           |                 |      |
| requests).     |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+

**TO:**

TABLE E-1a. PRODUCT GENERATION & ARCHIVE PERFORMANCE LOAD

+----------------+--------------+-----------+-----------------+------+
| **Product      | **Coverage** | **Res     | **Products**    | **A  |
| Name**         |              | olution** |                 | rchi |
|                |              |           |                 | ve** |
+================+==============+===========+=================+======+
| 1\.            | 0-230        | 1 x 1 °   | lowest 4 + 6.2, | lo   |
| Reflectivity   |              |           | 10.0, 14.0      | west |
|                |              |           |                 | 1    |
| Graphic        |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| Graphic        | 0-460        | 2 x 1 °   | lowest 3        | lo   |
|                |              |           |                 | west |
|                |              |           |                 | 1    |
+----------------+--------------+-----------+-----------------+------+
| Graphic        | 0-460        | 4 x 1 °   | None            |      |
+----------------+--------------+-----------+-----------------+------+
| Digital        | 0-460        | 1 x 1 °   | All elevations  | None |
+----------------+--------------+-----------+-----------------+------+
| **Super        | **0-460**    | **0.25 x  | **TBD**         | **T  |
| Resolution     |              | 0.5 °**   |                 | BD** |
| Reflectivity** |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 2\. Mean       | 0-60         | 0.25 x 1  | lowest 1        | lo   |
| Radial         |              | °         |                 | west |
| Velocity       |              |           |                 | 1    |
|                |              |           |                 |      |
| Graphic        |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| Graphic        | 0-115        | 0.5 x 1 ° | lowest 4 + 6.2, | lo   |
|                |              |           | 10.0            | west |
|                |              |           |                 | 1    |
+----------------+--------------+-----------+-----------------+------+
| Graphic        | 0-230        | 1 x 1 °   | 14 elevations   | lo   |
|                |              |           |                 | west |
|                |              |           |                 | 1    |
+----------------+--------------+-----------+-----------------+------+
| Digital        | 0-230        | 0.25 x 1  | All elevations  | None |
|                |              | °         |                 |      |
+----------------+--------------+-----------+-----------------+------+
| **Super        | **0-300**    | **0.25 x  | **TBD**         | **T  |
| Resolution     |              | 0.5 °**   |                 | BD** |
| Mean Radial    |              |           |                 |      |
| Velocity**     |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 3\. Spectrum   | 0-60         | 0.25 x 1  | lowest 1        | lo   |
| Width          |              | °         |                 | west |
|                |              |           |                 | 1    |
+----------------+--------------+-----------+-----------------+------+
|                | 0-115        | 0.5 x 1 ° | None            |      |
+----------------+--------------+-----------+-----------------+------+
|                | 0-230        | 1 x 1     | lowest 4        | lo   |
|                |              |           |                 | west |
|                |              |           |                 | 1    |
+----------------+--------------+-----------+-----------------+------+
| **Super        | **0-300**    | **0.25 x  | **TBD**         | **T  |
| Resolution     |              | 0.5 °**   |                 | BD** |
| Spectrum       |              |           |                 |      |
| Width**        |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 4\. Combined   | 230 x 230    | 1 x 1     | lowest 1        | None |
| Shear          |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 5\.            |              |           |                 |      |
| **Deleted**    |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 6\. Composite  | 0-230        | 1 x 1     | 1 (16 lvl)\     | N    |
| Reflectivity   |              |           | 1 (8 lvl)       | one\ |
|                |              |           |                 | None |
+----------------+--------------+-----------+-----------------+------+
|                | 0-460        | 4 x 4     | 1 (16 lvl)\     | yes\ |
|                |              |           | 1 (8 lvl)       | yes  |
+----------------+--------------+-----------+-----------------+------+
| -AP removed    | 0-230        | 1 x 1     | None            | None |
+----------------+--------------+-----------+-----------------+------+
| -AP removed    | 0-460        | 4 x 4     | None            | None |
+----------------+--------------+-----------+-----------------+------+
| 7\.            |              |           |                 |      |
| **Deleted**    |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 8\. Echo Tops  | 0-230        | 4 x 4     | 1               | yes  |
+----------------+--------------+-----------+-----------------+------+
| 9\.            |              |           |                 |      |
| **Deleted**    |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 10\. Severe    | 50 x 50      | see       | None            |      |
| Weather        |              | product   |                 |      |
| Analysis\      |              | de        |                 |      |
| (4 Products):  |              | scription |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 11\. Severe    | 0-230        | 4 x 4     | 1 (with VIL)    | yes  |
| Weather        |              |           |                 |      |
| Probability    |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 12\. Velocity  |              | 1000 ft   | None            |      |
| Azimuth        |              | alt       |                 |      |
| Display VAD    |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| -Wind Profile  |              | 1000 ft   | 1               | None |
|                |              | alt       |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 13\.           |              |           |                 |      |
| **Deleted**    |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 14\. Cross     |              | 1 x 0.5   | 3               | None |
| Section (230km |              |           |                 |      |
| X 70k\')       |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 15\.           |              |           |                 |      |
| **Deleted**    |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 16\. Storm Rel | 50 x 50      | 0.5 x 1°  | 1               |      |
| Mean Radial    |              |           |                 |      |
| Vel Region     |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| Map            | 0-230        | 1 x 1°    | lowest 4 + 6.2, | lo   |
|                |              |           | 10.0, 14.0      | west |
|                |              |           |                 | 1    |
+----------------+--------------+-----------+-----------------+------+
| 17\.           | 0-230        | 4 x 4     | 1               | yes  |
| Vertically     |              |           |                 |      |
| Integrated     |              |           |                 |      |
| Liquid         |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 18\. Storm     | 0-460        | N/A       | 1               | yes  |
| Tracking       |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 19\. Hail      | 0-230        | N/A       | 1               | yes  |
| Detection      |              |           |                 |      |
| (Enhanced)     |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 20\.           | 0-230        | N/A       | 1               | yes  |
| Mesocyclone    |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| Mesocyclone    | 360 degrees  | N/A       | All Elevations  | None |
| Rapid Update   | x 124 nm     |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| Mesocyclone    | 0-230 km     | N/A       | 1               | None |
| Detection      |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| Mesocyclone    | 0-230        | N/A       | All Elevations  | None |
| Detection Data |              |           |                 |      |
| Array Product  |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| Digital        | 0-230 km     | N/A       | All Elevations  | None |
| Mesocyclone    |              |           |                 |      |
| Detection      |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 21\. Tornado   | 0-230        | N/A       | 1               | yes  |
| Vortex         |              |           |                 |      |
| Signature      |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| Tornado Vortex | 0-230 km     | N/A       | 1               | None |
| Signature      |              |           |                 |      |
| Rapid Update   |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 22\. Storm     | 0-460        | N/A       | 1               | None |
| Structure      |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 23\. Layer     |              |           |                 |      |
| Composite      |              |           |                 |      |
| Reflec         |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 33M-60M        | 460 x 460    | 4 x 4     | 1               | None |
+----------------+--------------+-----------+-----------------+------+
| 24M-33M        | 460 x 460    | 4 x 4     | 1               | None |
+----------------+--------------+-----------+-----------------+------+
| Sfc-24M        | 460 x 460    | 4 x 4     | 1               | None |
+----------------+--------------+-----------+-----------------+------+
| AP removed     | 460 x 460    | 4 x 4     | 1               | None |
| Sfc-24M        |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 24.**Deleted** |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 25\. User      | N/A          | N/A       | 1               | yes  |
| Alert Message  |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 26\. Radar     | N/A          | N/A       | 1               | yes  |
| Coded Message  |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 27\. Free Text | N/A          | N/A       | 1               | None |
| Message        |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 28\. Sfc       | 0-230        | 2 x 1°    | 1               | yes  |
| Rainfall       |              |           |                 |      |
| Accumulation   |              |           |                 |      |
|                |              |           |                 |      |
| \- 1 hr        |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| -3 hr          | 0-230        | 2 x 1°    | 1               | None |
+----------------+--------------+-----------+-----------------+------+
| 29\. Storm     | 0-230        | 2 x 1°    | 1               | yes  |
| Total Rainfall |              |           |                 |      |
| Accum          |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 30\. Hourly    | 0-230        | 1/40 LFM  | 1               | yes  |
| Digital Precip |              |           |                 |      |
| Array          |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 31\.           | N/A          | N/A       | 1               | yes  |
| Supplemental   |              |           |                 |      |
| Precipitation  |              |           |                 |      |
| Data           |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 32\. User      | 0-230        | 2 x 1°    | 1               | None |
| Selectable     |              |           |                 |      |
| Precip Accum   |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 33\. Hybrid    | 0-230\       | 1 x 1°\   | 1               | None |
| Reflectivity   | 0-230        | 2 x 1°    |                 |      |
|                |              |           |                 |      |
| \- Digital\    |              |           |                 |      |
| - Image        |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 34\. Clutter   | 0-230        | 1 km x    | 1               | Yes  |
| filter control |              | 1.4º      |                 |      |
|                |              | (Legacy   |                 |      |
|                |              | RDA)\     |                 |      |
|                |              | 1 km x    |                 |      |
|                |              | 1.0º      |                 |      |
|                |              | (Open     |                 |      |
|                |              | RDA)      |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 35\. ITWS      | 0-115        | 1 km x 1  | None            | None |
| Digital Base   |              | º         |                 |      |
| Velocity       |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 36\. Clutter   | 0-230        | 1 x 1°    | Lowest          | None |
| Likelihood     |              |           |                 |      |
| Reflectivity   |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 37\. Clutter   | 0-230        | 1 x 1°    | Lowest          | None |
| Likelihood     |              |           |                 |      |
| Doppler        |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 38\. SuperOb   | 0-230        | Default = | Default = 1 per | None |
|                | (adaptable,  | 5 x 6°    | hour (adaptable |      |
|                | de           | (a        | between 6 per   |      |
|                | fault=100km) | daptable) | hour and one    |      |
|                |              |           | every 3 hours)  |      |
+----------------+--------------+-----------+-----------------+------+
| 39\. High      | 0-460        | 1 x 1°    | 1               | Yes  |
| Resolution VIL |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 40\. User      | 360 degrees  | 1 degree  | None            | None |
| Selectable     | x 124 nm     | x 0.54 nm |                 |      |
| Layer          |              |           |                 |      |
| Composite      |              |           |                 |      |
| Reflectivity   |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 41\. Digital   | 0-345        | 1 x 1 °   | 1               | None |
| High           |              |           |                 |      |
| Resolution     |              |           |                 |      |
| Enhanced Echo  |              |           |                 |      |
| Tops           |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 42 One Hour    | 0-230        | 1 x 1     | 1               | None |
| Snow           |              |           |                 |      |
| Accumulation   |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 43\. Storm     | 0-230        | 1 x 1     | 1               | None |
| Total Snow     |              |           |                 |      |
| Accumulation   |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| 44\. User      | 0-230        | 1 x 1     | 1               | None |
| Selectable     |              |           |                 |      |
| Snow           |              |           |                 |      |
| Accumulation   |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+
| Note: Total    |              |           |                 |      |
| product        |              |           |                 |      |
| generation is  |              |           |                 |      |
| depicted (both |              |           |                 |      |
| routine and    |              |           |                 |      |
| one time       |              |           |                 |      |
| requests).     |              |           |                 |      |
+----------------+--------------+-----------+-----------------+------+