GENERAL INFORMATION

1.  Principal Investigator:  Prof James Weinman
 
2.  Institution: NASA Goddard Space Flight Center, Code 975, Building 22,
Greenbelt MD 20771

3.  Instrument (include brief physical description and
    explain function):  

Microwave radiometer suite (collectively the Airborne Multichannel Microwave
Radiometer - AMMR) with channels at 21, 37 and 92 GHz.  The radiometers were
designed for airborne use but have been modified to operate in ground-based
mode.  The radiometer shipping cases (3 in all) are fitted with rotatable
mirrors which allow manual scanning in the vertical plane.  The radiometers
will be predominantly operated in a zenith pointing mode.  The channels are
such that we can retrieve cloud liquid water path and water vapor column
above the radiometer during their round-the-clock operating cycle.
 
We will also bring the Millimeter-wave Imaging Radiometer (MIR) with
channels at 89, 150, 183 and 220 GHz to suppliment our data during
interesting weather conditions.  This instrument flew on board the NASA ER-2
during the Spring IOP in support of SUCCESS.  Ground-based operation of this
instrument during the Fall IOP will provide ancillary data for retrieval of
water vapor and cloud liquid water content.

4.  a. Brief statement of work including objectives,
       approach, and requisite atmospheric conditions:

We aim to add to our 450 hours of AMMR radiometer data from the Spring 96
IOP.  Cloud liquid water path and water vapor column will be retrieved and
the results compared with those from the CART site MWP and our airborne
21/37 GHz radiometer flown in the Twin Otter of the ARM-UAV program.  The
radiometers were demonstrated to work well in all atmospheric conditions.
Ideal conditions for our work are non-drizzling water clouds.  Coordinated
scans in the vertical plane may be carried out where possible with
participating cloud radars for retrieval of 2D cloud liquid water content
fields.

    b. Is the information to be gathered during the IOP for
       the support of an ARM Instrument Development Program
       (IDP) project?

No - our primary objective is to support the ARM-UAV Fall 96 mission.

    c. If the answer to 4.c. is yes, identify the CART
       instrument and the specific objectives of the work
       with regard to producing the CART instrument.

INFORMATION REQUIRED TO ASSESS THE IMPACT ON OPERATIONS AT 
THE SOUTHERN GREAT PLAINS CART SITE

5.  Date of arrival at ARM Southern Great Plains CART site:

Instruments shipped week of September 2nd.  Investigators will arrive week
of September 9th 1996.  Note investigators will also be supporting the
ARM-UAV program at Blackwell-Tonkowa airport.

6.  Dates of operation:

September 11th through October 5th

7.  Hours of operation:

Radiometers will be operated 24 hours per day, mostly unmanned with one or
two visits by our personnel to the site on each day.  The MIR may be stored
during inclement weather.

8.  Date of departure:

October 5th or 6th

9.  Names of personnel who will be working at the site:

Paul Racette
Mike Triesky
Dave Jones
James Weinman

10. Requested instrument location (near central facility,
    etc.):

Where  previously located - just to the east of the road crew storage
garage.  On the last IOP we received excellent support from your staff and
two horizontal palettes were set up for us at this location for locating our
boxes.  We would like to use these again if possible.

Note: After we receive your response to items 11 - 14, a site 
operations coordinator will contact you to discuss the 
elements of support you may require.  We want to be helpful, 
but can only provide support within the limits available to 
us.  Some elements of support may be difficult or present 
particular problems.  There may be alternative solutions 
available to site operations.  The site operations 
coordinator will explore these with you to determine the best 
solution.

11. Site Support

       a. Will you request assistance of the CART site staff
          during deployment or operations?

Yes.

          If yes:

          (1)  Estimate the number of man-hours requested: 

22 man-hours if palettes are still in place from previous IOP.  Upto 4 if
palettes need re-siting

          (2)  Will the CART staff require special training?  

No - we will operate the instruments ourselves

               If yes, explain.

          (3)  Is an operating procedure available for CART 
               site evaluation and use?   N/A

               If yes, please provide us with a copy.

               If no, when will an operating procedure be
               available?

       b. Will you need assistance with on-site delivery or
          unloading, e.g., access to a forklift, etc.?

Possibly  10 mins help moving boxes into location (forklift may be necessary
to remove boxes from shipping vehicle)

       c. Will you need on-site transportation?

No

          If yes, explain.

       d. Will you need on-site communications?

             Voice?  No

             Data?  No

12. Facility Requests

       a.  Dimensions of instrument, equipment and shelter:

For the AMMR radiometer: Box sizes:

30.5(L) x 49.5(W) x 24.5(H) inches    x 1
37.9(L) x 21.0(W) x 18.0(H) inches    x 2

For the MIR

46.0(L) x 28.0(W) x 36.0(H) inches    x 2

       b.  Additional space required for access, support
           facilities, vehicles, etc.:

We would like to be able to bring the MIR inside when not in use and have
some indoor work area (previously the road crew storage shed) in case
examination of the radiometer interiors is required.

       c.  Requests for the the setting, e.g., grade,
           vegetation, concrete support pad, etc.:

As before - the area to the east of the shed had tall vegetation cut down
giving a clear view to a low elevation horizon (required for calibration
purposes)

       d.  Access requirements (vehicle or pedestrian,
           frequency):  

May wish to drive compact car to front of storage shed to unload boxes,
otherwise access will be on foot approximately twice daily

       e.  Shelter request for instrument, equipment,
           personnel:

As in 12b.

13. Equipment Requested

       a. Routine Tools:  May wish to sign out a conventional toolkit for
one day at the start of the IOP and one at the end
       b. Special Tools: We will provide
       c. Electronic parts: We will provide
       d. Diagnostic or test equipment: We will provide
       e. Simple hardware: None
       f. Simple building material: None needed
       g. Laboratory material: We will provide
       h. Other:

14. Expendables Requested

       a. Specialty gases:
       b. Solvents:
       c. Reagents:
       d. Cleaning materials:
       e. Balloons:
       f. Stationery supplies:
       g. Other:  Accessible LN2 supply with flexible delivery hose

15. Utilities Requested

       a. Power:

          Source and number of circuits?  2

          Voltage and total amperage? 120VAC
 
          Single Phase?          3-Phase?   Single phase only

       b. Water:  No special requirement
  
       c. Sewage and waste disposal: No special requirement

16. Interference and susceptibility to Interference (include 
    information on power output and frequency

       a. Electronic:              Instruments are passive giving no emissions
       b. Electromagnetic:
       e. Acoustic:

17. Safety Issues

       a. Does this equipment emit microwave radiation?   No (passive
instrument)

          What is the output power?
          Restricted safety area:    No restriction

       b. Does this equipment emit acoustic energy?  No
          Frequency range:

          dB at 5 feet from source:
          Direction of maximum  acoustic energy:

       c. Does this equipment emit laser energy? No

          Class:
          Laser power:
          Is the laser eye safe?
          What purpose does it perform?
          Will a restricted area be required?

       d. Hazardous materials used, e.g., toxic materials,
          compressed gases, cryogens, etc.  (Material Safety 
          Data Sheets are required.)     

 Liquid nitrogen during calibration only.  NASA personnel are familiar with
DoE cryogen handling requirements and will be present during all such activity.

          Quantity to be stored at the site:  Would wish to make use of
CART site supply therefore no special requirement 
          How will hazardous materials be stored?  N/A
          How will materials be installed into the equipment?  N/A
          How will excess material be disposed of? N/A

       e. Specify the waste generated by the operation of the 
          equipment.  

None

          Type of waste:
          Quantity of waste:
          Form of hazardous waste:
          Plan for disposal of waste:

       f. Will work be performed at an elevated area or
          confined space?  

No - all operations at or near ground level and in the open, perhaps with
the exception of investigative work on radiometer components at desk level.

          How will the work area be accessed?  By foot
          Height of the fall potential:  None
          Plan for fall protection (handrails, safety harness 
          and SOP for their use):  N/A

       g. Will safety equipment be properly maintained and
          deployed (yes, no, or n/a)? 

Yes - LN2 handling equipment will be used and maintained properly

            (1) Fire Extinguishers:

            (2) Signs Denoting

              Hearing hazard: N/A
              Microwave radiation: N/A
              Restricted area: N/A
              Hazardous materials: N/A
              Safety glasses required: N/A
              High Voltage or Energized Electrical Equipment: N/A
              Tripping hazards: Extension cords will be flagged
              Other identified hazards: N/A

        h. Are there any other known safety issues and/or
           requirements?

18. Do you have weather support requirements?   

No 

        a. Weather forecast support for operations  

N/A

           (1) List specific cloud, precipitation, etc.
               conditions that must be known in order to make
               operational decisions or that could favorably 
               or adversly impact your experiment.

           (2) What is the desired forecast lead time for
               each of the conditions listed in (1)?

        b. Weather warning support requirements  N/A

           (1) List specific conditions that could cause 
               safety hazards for your operations, e.g., 
               lightning, high winds, etc:

           (2) Desired weather warning lead time:

19. If you have any other support requirements that have not 
    been addressed by questions 1 - 19, please explain them 
    here:

YOUR DATA CONTRIBUTIONS TO ARM

20. List the atmospheric data that you will release to the 
    ARM Science Team (through the ARM Experiment Center and
    Data Archive) and the estimated availability date (months
    after IOP) for each of these data.

Brightness temperatures at 21, 37, 92 GHz from AMMR radiometer
Brightness temperatures at 89, 150, 183, 220 GHz from MIR
Units: Kelvin
Accuracy : Approx 3 K 
Precision : Approx 0.5 K
Ranges: 3-330 K
Temporal resolution : Approx 1 Hz
Temporal reporting  : Undecided - may be 0.25 to 1 Hz
Items g-l : N/A
Angular resolution: -3dB full width = 6 degrees (MIR 3 degrees)

Retrieved variables : cloud liquid water path and column water vapor
Units : kg/m2
Accuracy and precision : under review
Temporal reporting: as brightness temperatures

21.  For each of the data types that your listed in item 21,
     please provide information on the following data
     attributes, as applicable:

       a. Units
       b. Accuracy (proximity to true value)
       c. Precision (repeatability, reciprocal of sample
          variance)
       d. Range of acceptable values
       e. Temporal resolution (temporal representativeness of
          observation)
       f. Temporal reporting interval (time interval between
          successive
          observations)
       g. Vertical resolution
       h. Vertical range (minimum and maximum)
       i. Vertical coordinate (meters above mean sea level,
          millibars, etc.)
       j. Horizontal resolution
       k. Horizontal range (minimum and maximum)
       l. Horizontal coordinate (UTM, lat/long, etc.)
       m. Angular resolution
       n. Angular spacing
       o. Spectral resolution
       p. Spectral range

22. What data format do you plan to use?

All data will provided to the ARM program in NetCDF format in due course
with supporting metadata and platform files.

23. Provide an estimate of the data volume, itemized by
    observation:

Will advise at a later date

YOUR DATA REQUIREMENTS FROM ARM 

24. List the in situ quantities you require for comparison
    with your instrument data.

Radiosonde data

25. List the additional in situ quantities you require (see
    note below):

26. List the remotely sensed quantities you require for 
    comparison with your instrument data:

CART site MWR brightnesses and retrieved products

27. List the additional remotely sensed quantities you
    require (see note below):

Note:  These additional quantities might be needed to 
diagnose discrepancies between remote sensor and in situ 
observations, or to calibrate/tune algorithms used to derive 
data streams from remote sensor output.

Note: Dave Jones of NASA GSFC is already a regisitered user of the ARM ARCHIVE.

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