Mr. Donald Abelson

Chief of the International Bureau

Federal Communications Commission

445 12th Street SW

Washington, D.C. 20554

Dear Mr. Abelson:

The National Telecommunications and Information Administration (NTIA),
on behalf of the Executive Branch Agencies, have approved the release of
an additional draft Executive Branch proposal for WRC-07. This proposal
considers the federal agency inputs toward the development of U.S.
Proposals for WRC-07.

The enclosed document contains a draft proposal that addresses agenda
item 1.12, Appendix 4. Active and Passive Sensors. This proposal is
forwarded for your consideration and review by your WRC-07 Advisory
Committee. Jim Vorhies of my staff is the primary contact for NTIA.

> Sincerely,
>
> (Original signed by Karl Nebbia February 17, 2006)
>
> Fredrick R. Wentland
>
> Associate Administrator
>
> Office of Spectrum Management

Enclosure

**United States of America**

**DRAFT PROPOSAL FOR THE WORK OF THE CONFERENCE**

**Agenda Item 1.12:** to consider possible changes in response to
Resolution **86** (Rev. Marrakesh, 2002) of the Plenipotentiary
Conference: "Advance publication, coordination, notification and
recording procedures for frequency assignments pertaining to satellite
networks" in accordance with Resolution **86 (WRC-03)**;

**Background information**: In response to a request by the scientific
and research community responsible for operation of active and passive
sensors on satellites (as defined in Nos. **1.182** and **1.183**), and
in coordination with that community, a set of technical data relating to
these sensors was established for use by all administrations for
registration purposes. The Director of the Radiocommunication Bureau
(BR) published Circular Letter CR/137 of 14 February 2000, which
requests administrations, when submitting advance publication
information to the Bureau on planned Earth exploration-satellite service
(EESS)/space research service (SRS) satellite networks in which active
and/or passive sensors are to be deployed, to kindly also submit
specific information as attached to that Circular Letter.

Following CR/137, the Director of the BR in his Report to the World
Radiocommunication Conference 2003 (WRC-03)[^1] indicated that there
were additional data requirements for the EESS/SRS contained in CR/137
and suggested that the conference might wish to consider reviewing
Appendix **4** to include the additional information. However, no
proposals were submitted to the conference.

Currently, the additional information submitted to BR in accordance with
Circular Letter CR/137 is being scanned and published in the
International Frequency Information Circular (IFIC) (Space services) as
an attachment to the Special Section related to the relevant advanced
publication (API) only. It is not reproduced in the IFIC at the time of
notification. The scanned documents are being published once on IFIC
CD-ROM. These data are neither stored in the Space Network System (SNS)
database nor published on Space Radiocommunication Station on
CD-ROM.[^2] Therefore, the information concerning EESS and SRS satellite
networks where active and passive sensor systems are to be deployed is
not easily available after publication of the API on the relevant IFIC.
This information is useful in analyzing the compatibility of these
sensors with systems operating in other services and facilitates their
advance publication, notification and the subsequent entry in the Master
International Frequency Register (MIFR).

To address the need, the data elements contained in Appendix **4** were
reviewed to determine which existing elements should be required to best
facilitate the advance publication and notification of active and
passive sensors on satellites. Based on the review, the addition of two
new columns to account for the advance publication and notification of
active and passive sensors are proposed. The inclusion of the new
columns would consequentially require modifications to the BR software
and revisions to the Preface to the IFIC, *inter alia,* the inclusion of
new station classes.

Proposal

USA/ /01 MOD

+-----+--------------------------------------------------+-----+-----+
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| pen |                                                  |     |     |
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| 4   |                                                  |     |     |
|     |                                                  |     |     |
| *   |                                                  |     |     |
| *Ta |                                                  |     |     |
| ble |                                                  |     |     |
| of  |                                                  |     |     |
| cha |                                                  |     |     |
| rac |                                                  |     |     |
| ter |                                                  |     |     |
| ist |                                                  |     |     |
| ics |                                                  |     |     |
| to  |                                                  |     |     |
| be  |                                                  |     |     |
| sub |                                                  |     |     |
| mit |                                                  |     |     |
| ted |                                                  |     |     |
| for |                                                  |     |     |
| sp  |                                                  |     |     |
| ace |                                                  |     |     |
| and |                                                  |     |     |
| ra  |                                                  |     |     |
| dio |                                                  |     |     |
| ast |                                                  |     |     |
| ron |                                                  |     |     |
| omy |                                                  |     |     |
| s   |                                                  |     |     |
| erv |                                                  |     |     |
| ice |                                                  |     |     |
| s** |                                                  |     |     |
| (W  |                                                  |     |     |
| RC- |                                                  |     |     |
| 03) |                                                  |     |     |
+-----+--------------------------------------------------+-----+-----+
| *   | ***A ^\_^ GENERAL CHARACTERISTICS OF THE         | *   | *   |
| *It | SATELLITE NETWORK, EARTH STATION OR RADIO        | *[A | *[A |
| ems | ASTRONOMY STATION***                             | dva | dva |
| in  |                                                  | nce | nce |
| A   |                                                  | pu  | pu  |
| ppe |                                                  | bli | bli |
| ndi |                                                  | cat | cat |
| x** |                                                  | ion | ion |
|     |                                                  | or  | or  |
|     |                                                  | not | not |
|     |                                                  | ifi | ifi |
|     |                                                  | cat | cat |
|     |                                                  | ion | ion |
|     |                                                  | of  | of  |
|     |                                                  | a   | a   |
|     |                                                  | s   | s   |
|     |                                                  | pac | pac |
|     |                                                  | ebo | ebo |
|     |                                                  | rne | rne |
|     |                                                  | act | act |
|     |                                                  | ive | ive |
|     |                                                  | or  | or  |
|     |                                                  | p   | p   |
|     |                                                  | ass | ass |
|     |                                                  | ive | ive |
|     |                                                  | sen | sen |
|     |                                                  | sor | sor |
|     |                                                  | as  | as  |
|     |                                                  | d   | d   |
|     |                                                  | efi | efi |
|     |                                                  | ned | ned |
|     |                                                  | in  | in  |
|     |                                                  | N   | N   |
|     |                                                  | os. | os. |
|     |                                                  | 1.  | 1.  |
|     |                                                  | 182 | 182 |
|     |                                                  | and | and |
|     |                                                  | 1.  | 1.  |
|     |                                                  | 183 | 183 |
|     |                                                  | on  | on  |
|     |                                                  | bo  | bo  |
|     |                                                  | ard | ard |
|     |                                                  | a   | a   |
|     |                                                  | no  | g   |
|     |                                                  | n-g | eos |
|     |                                                  | eos | tat |
|     |                                                  | tat | ion |
|     |                                                  | ion | ary |
|     |                                                  | ary | sat |
|     |                                                  | sat | ell |
|     |                                                  | ell | ite |
|     |                                                  | ite | n   |
|     |                                                  | n   | etw |
|     |                                                  | etw | ork |
|     |                                                  | ork | ]{. |
|     |                                                  | ]{. | und |
|     |                                                  | und | erl |
|     |                                                  | erl | ine |
|     |                                                  | ine | }** |
|     |                                                  | }** |     |
+-----+--------------------------------------------------+-----+-----+
| *   | **IDENTITY OF THE SATELLITE NETWORK, EARTH       | **  | **  |
| *A. | STATION OR RADIOASTRONOMY STATION**              |  ** |  ** |
| 1** |                                                  |     |     |
+-----+--------------------------------------------------+-----+-----+
| A.  | the identity of the satellite network            | *   | *   |
| 1.a |                                                  | *[X | *[X |
|     |                                                  | ]{. | ]{. |
|     |                                                  | und | und |
|     |                                                  | erl | erl |
|     |                                                  | ine | ine |
|     |                                                  | }** | }** |
+-----+--------------------------------------------------+-----+-----+
| A   | the symbol of the notifying administration (see  | *   | *   |
| .1. | the Preface)                                     | *[X | *[X |
| f.1 |                                                  | ]{. | ]{. |
|     |                                                  | und | und |
|     |                                                  | erl | erl |
|     |                                                  | ine | ine |
|     |                                                  | }** | }** |
+-----+--------------------------------------------------+-----+-----+
| A   | if the notice is submitted on behalf of a group  | *   | *   |
| .1. | of administrations, the symbols of each of the   | *[+ | *[+ |
| f.2 | administrations in the group, submitting the     | ]{. | ]{. |
|     | information on the satellite network (see the    | und | und |
|     | Preface)                                         | erl | erl |
|     |                                                  | ine | ine |
|     |                                                  | }** | }** |
+-----+--------------------------------------------------+-----+-----+
| A   | if the notice is submitted on behalf of an       | *   | *   |
| .1. | intergovernmental satellite organization, the    | *[+ | *[+ |
| f.3 | symbol of that organization (see the Preface)    | ]{. | ]{. |
|     |                                                  | und | und |
|     |                                                  | erl | erl |
|     |                                                  | ine | ine |
|     |                                                  | }** | }** |
+-----+--------------------------------------------------+-----+-----+
| *   | **DATE OF BRINGING INTO USE**                    | **  | **  |
| *A. |                                                  |  ** |  ** |
| 2** |                                                  |     |     |
+-----+--------------------------------------------------+-----+-----+

  ------------ -------------------------------------------------- ------------------------ ------------------------
  A.2.a        the date (actual or foreseen, as appropriate) of   **[X]{.underline}**      **[X]{.underline}**
               bringing the frequency assignment (new or                                   
               modified) into use                                                          

               The date of bringing into use denotes the date at                           
               which the frequency assignment is brought into                              
               regular operation\* to provide the published                                
               radiocommunication service with the technical                               
               parameters within the technical characteristics                             
               notified to the Bureau                                                      

               Whenever the assignment is changed in any of its                            
               basic characteristics (except in the case of a                              
               change under A.1.a, the date to be given shall be                           
               that of the latest change (actual or foreseen, as                           
               appropriate)                                                                

               ^\*^ Pending further studies by ITU-R on the                                
               applicability of the term "regular operation" to                            
               non-geostationary satellite networks, the                                   
               condition of regular operation shall be limited to                          
               geostationary satellite networks                                            

  A.2.b        for a space station, the period of validity of the **[X]{.underline}**      **[X]{.underline}**
               frequency assignments (see Resolution **4 (Rev.                             
               WRC-03)**)                                                                  

  **A.3**      **OPERATING ADMINISTRATION OR AGENCY**             ** **                    ** **

  A.3.a        the symbol for the operating administration or     **[X]{.underline}**      **[X]{.underline}**
               agency (see the Preface) that is in operational                             
               control of the space station, earth station or                              
               radio astronomy station                                                     

               In the case of Appendix **30B**, required only for                          
               notification under Article 8                                                

  A.3.b        the symbol for the address of the administration   **[X]{.underline}**      **[X]{.underline}**
               (see the Preface) to which communication should be                          
               sent on urgent matters regarding interference,                              
               quality of emissions and questions referring to                             
               the technical operation of the network or station                           
               (see Article **15**)                                                        

               In the case of Appendix **30B**, required only for                          
               notification under Article 8                                                

  **A.4**      **ORBITAL INFORMATION**                            ** **                    ** **

  A.4.a.1      the nominal geographical longitude on the                                   **[X]{.underline}**
               geostationary-satellite orbit (GSO)                                         

  A.4.a.2.a    the planned longitudinal tolerance easterly limit  ** **                    **[X]{.underline}**

  A.4.a.2.b    the planned longitudinal tolerance westerly limit  ** **                    **[X]{.underline}**

  A.4.a.2.c    the planned inclination excursion                  ** **                    **[X]{.underline}**

  A.4.b.1      the number of orbital planes                       **[X]{.underline}**      

  A.4.b.2      the reference body code                            **[X]{.underline}**      

  A.4.b.4.a    the angle of inclination (*i~j~*) of the orbital   **[X]{.underline}**      
               plane with respect to the Earth's equatorial plane                          
               (0° ≤ *i~j~* \< 180°)                                                       

  A.4.b.4.b    the number of satellites in the orbital plane      **[X]{.underline}**      

  A.4.b.4.c    the period                                         **[X]{.underline}**      

  A.4.b.4.d    the altitude, in kilometres, of the apogee of the  **[X]{.underline}**      
               space station                                                               

  A.4.b.4.e    the altitude, in kilometres, of the perigee of the **[X]{.underline}**      
               space station                                                               

  **A.5**      **COORDINATIONS**                                                           ** **

  **A.6**      **AGREEMENTS**                                                              ** **

  **A.7**      **SPECIFIC EARTH STATION OR RADIO ASTRONOMY                                 ** **
               STATION SITE CHARACTERISTICS**                                              

  **A.8**      **Not used**                                                                ** **

  **A.9**      **Not used**                                                                ** **

  **A.10**     **EARTH STATION COORDINATION AREA DIAGRAMS**                                ** **

  **A.11**     **REGULAR HOURS OF OPERATION**                                              ** **

  **A.12**     **RANGE OF AUTOMATIC GAIN CONTROL, in dB**                                  ** **

  **A.13**     **REFERENCES TO THE PUBLISHED SPECIAL SECTIONS OF                           ** **
               THE BUREAU\'S INTERNATIONAL FREQUENCY INFORMATION                           
               CIRCULAR (see the Preface)**                                                

  A.13.a       the reference and number of the advance            **[X^3^]{.underline}**   **[X^3^]{.underline}**
               publication information in accordance with No.                              
               **9.1**                                                                     

  **A.14**     **FOR STATIONS OPERATING IN A FREQUENCY BAND       ** **                    ** **
               SUBJECT TO Nos. 22.5C, 22.5D OR 22.5F: SPECTRUM                             
               MASKS**                                                                     

  **A.15**     **COMMITMENT REGARDING COMPLIANCE WITH ADDITIONAL  ** **                    ** **
               OPERATIONAL EQUIVALENT POWER FLUX DENSITY, epfd                             
               LIMITS**                                                                    

  **A.16**     **COMMITMENT REGARDING COMPLIANCE WITH OFF^\_^AXIS ** **                    ** **
               POWER LIMITATIONS OR POWER FLUX-DENSITY, pfd,                               
               LIMITS**                                                                    

  **A.17**     **COMPLIANCE WITH POWER FLUX-DENSITY, pfd,         ** **                    ** **
               LIMITS**                                                                    

  A.17.d       the mean power flux-density produced at the        **[+]{.underline}**      **[+]{.underline}**
               Earth's surface by any spaceborne sensor, as                                
               defined in No. **5.549A**                                                   

               Required only for satellite systems operating in                            
               the Earth exploration-satellite service (active)                            
               or space research service (active) in the band                              
               35.5-36 GHz                                                                 

  **Items in   ***B ^\_^ CHARACTERISTICS TO BE PROVIDED FOR EACH  **[Advance publication   **[Advance publication
  Appendix**   SATELLITE ANTENNA BEAM OR EACH EARTH STATION OR    or notification of a     or notification of a
               RADIO ASTRONOMY ANTENNA***                         spaceborne active or     spaceborne active or
                                                                  passive sensor as        passive sensor as
                                                                  defined in Nos. 1.182    defined in Nos. 1.182
                                                                  and 1.183 on board a     and 1.183 on board a
                                                                  non-geostationary        geostationary satellite
                                                                  satellite                network]{.underline}**
                                                                  network]{.underline}**   
  ------------ -------------------------------------------------- ------------------------ ------------------------

  ------------ -------------------------------------------------- ------------------------ ------------------------
  **B.1**      **IDENTIFICATION AND DIRECTION OF THE SATELLITE                             ** **
               ANTENNA BEAM**                                                              

  B.1.a        the designation of the satellite antenna beam      **[X]{.underline}**      **[X]{.underline}**

               For an earth station, the designation of the                                
               satellite antenna beam of the associated space                              
               station                                                                     

  B.1.b        an indicator showing whether the antenna beam,     **[X]{.underline}**      **[X]{.underline}**
               under B.1.a, is fixed or whether it is steerable                            
               and / or reconfigurable                                                     

  **B.2**      **TRANSMISSION / RECEPTION INDICATOR FOR THE BEAM  ** **                    ** **
               OF THE SPACE STATION OR THE ASSOCIATED SPACE                                
               STATION**                                                                   

  **B.3**      **SPACE STATION ANTENNA CHARACTERISTICS**          ** **                    ** **

  B.3.a.1      the maximum co-polar isotropic gain, in dBi        **[X]{.underline}**      **[X]{.underline}**

               Where a steerable beam (see No. **1.191**) is                               
               used, if the effective boresight area (see No.                              
               **1.175**) is identical with the global service                             
               area, the maximum antenna gain, in dBi, is                                  
               applicable to all points on the Earth's visible                             
               surface                                                                     

  B.3.c.1      the co-polar antenna radiation pattern, in the     **[X]{.underline}**      **[X]{.underline}**
               case of:                                                                    

               -- non-geostationary space stations                                         

               -- geostationary or non-geostationary space                                 
               stations where the antenna radiation beam is                                
               directed towards another satellite                                          

               -- elliptical antenna beams for Appendix **30**,                            
               **30A** or **30B**                                                          

  **B.4**      **ADDITIONAL CHARACTERISTICS FOR NON-GEOSTATIONARY ** **                    ** **
               SPACE STATION ANTENNA**                                                     

  B.4.b.1.a    the orientation angle alpha, in degrees, (see most **[X]{.underline}**      **[X]{.underline}**
               recent version of Recommendation ITU-R SM.1413)                             

  B.4.b.1.b    the orientation angle beta, in degrees, (see most  **[X]{.underline}**      **[X]{.underline}**
               recent version of Recommendation ITU-R SM.1413)                             

  **Items in   ***C ^\_^ CHARACTERISTICS TO BE PROVIDED FOR EACH  **[Advance publication   **[Advance publication
  Appendix**   GROUP OF FREQUENCY ASSIGNMENTS FOR A SATELLITE     or notification of a     or notification of a
               ANTENNA BEAM OR AN EARTH STATION OR RADIO          spaceborne active or     spaceborne active or
               ASTRONOMY ANTENNA***                               passive sensor as        passive sensor as
                                                                  defined in Nos. 1.182    defined in Nos. 1.182
                                                                  and 1.183 on board a     and 1.183 on board a
                                                                  non-geostationary        geostationary satellite
                                                                  satellite                network]{.underline}**
                                                                  network]{.underline}**   
  ------------ -------------------------------------------------- ------------------------ ------------------------

  --------- -------------------------------------------------- ------------------------ ------------------------
  **C.1**   **FREQUENCY RANGE**                                                         ** **

  **C.2**   **ASSIGNED FREQUENCY (FREQUENCIES)**                                        ** **

  C.2.a.1   the assigned frequency (frequencies), as defined   **[X^4^]{.underline}**   **[X^4^]{.underline}**
            in No. **1.148**                                                            

            ^\_^ in kHz up to 28 000 kHz inclusive                                      

            ^\_^ in MHz above 28 000 kHz to 10 500 MHz                                  
            inclusive                                                                   

            ^\_^ in GHz above 10 500 MHz                                                

            If the basic characteristics are identical, with                            
            the exception of the assigned frequency, a list of                          
            frequency assignments may be provided                                       

            In the case of Appendix **30B**, required only for                          
            notification under Article 8                                                

  C.2.b     the centre of the frequency band observed          **[X^5^]{.underline}**   **[X^5^]{.underline}**

            ^\_^ in kHz up to 28 000 kHz inclusive                                      

            ^\_^ in MHz above 28 000 kHz to 10 500 MHz                                  
            inclusive                                                                   

            ^\_^ in GHz above 10 500 MHz                                                

  C.2.c     if the frequency assignment is to be filed under   **[+]{.underline}**      **[+]{.underline}**
            No. **4.4**, an indication to that effect                                   

  **C.3**   **ASSIGNED FREQUENCY BAND**                                                 ** **

  C.3.a     the bandwidth of the assigned frequency band, in   **[X^4^]{.underline}**   **[X^4^]{.underline}**
            kHz (see No. **1.147**)                                                     

            In the case of Appendix **30B**, required only for                          
            notification under Article 8                                                

  C.3.b     the bandwidth of the frequency band, in kHz,       **[X^5^]{.underline}**   **[X^5^]{.underline}**
            observed by the station                                                     

  **C.4**   **CLASS OF STATION AND NATURE OF SERVICE**                                  ** **

  C.4.a     the class of station, using the symbols from the   **[X]{.underline}**      **[X]{.underline}**
            Preface                                                                     

  C.4.b     the nature of service performed, using the symbols **[X]{.underline}**      **[X]{.underline}**
            from the Preface                                                            

  **C.5**   **RECEIVING SYSTEM NOISE TEMPERATURE**                                      ** **

  **C.6**   **POLARIZATION**                                                            ** **

  C.6.a     the type of polarization (see the Preface)         **[X^3^]{.underline}**   **[X^3^]{.underline}**

            In the case of circular polarization, this                                  
            includes the sense of polarization (see Nos.                                
            **1.154** and **1.155**)                                                    

            In the case of a space station submitted in                                 
            accordance with Appendix **30** or **30A**, see                             
            § 3.2 of Annex 5 to Appendix **30**                                         

  C.6.b     if linear polarization is used, the angle, in      **[+^3^]{.underline}**   **[+^3^]{.underline}**
            degrees, measured counter-clockwise in a plane                              
            normal to the beam axis from the equatorial plane                           
            to the electric vector of the waves as seen from                            
            the satellite                                                               

            In the case of a space station submitted in                                 
            accordance with Appendix **30** or **30A**, see                             
            § 3.2 of Annex 5 to Appendix **30**                                         
  --------- -------------------------------------------------- ------------------------ ------------------------

  --------- -------------------------------------------------- ------ -------
  **C.7**   **NECESSARY BANDWIDTH AND CLASS OF EMISSION**             ** **

            (in accordance with Article **2** and Appendix            
            **1)**                                                    
  --------- -------------------------------------------------- ------ -------

  ------------ -------------------------------------------------- ------------------------ ------------------------
  **C.8**      **POWER CHARACTERISTICS OF THE TRANSMISSION**                               ** **

  C.8.b.1      the total peak envelope power, in dBW, supplied to **[X^4^]{.underline}**   **[X^4^]{.underline}**
               the input of the antenna                                                    

               For coordination or notification of an Appendix                             
               **30A** earth station the values shall include the                          
               maximum range of power control                                              

               [For notification of active sensors the values                              
               shall include the average power, in                                         
               dBW.]{.underline}                                                           

               Required if C.8.a.1 is not provided                                         

  **C.9**      **INFORMATION ON MODULATION CHARACTERISTICS**                               ** **

  **C.10**     **TYPE AND IDENTITY OF THE ASSOCIATED STATION(S)** ** **                    

               (the associated station may be another space                                
               station, a typical earth station of the network or                          
               a specific earth station)                                                   

  **C.11**     **SERVICE AREA(S)**                                                          

  **C.12**     **REQUIRED PROTECTION RATIO**                                                

  **C.13**     **CHARACTERISTICS OF OBSERVATIONS FOR RADIO                                  
               ASTRONOMY STATIONS**                                                        

  **C.14**     **Not used**                                                                ** **

  **C.15**     **DESCRIPTION OF THE GROUP(S) REQUIRED IN THE CASE                           
               OF NON-SIMULTANEOUS EMISSIONS**                                             

  **Items in   ***D ^\_^ OVERALL LINK CHARACTERISTICS***          **[Advance publication   **[Advance publication
  Appendix**                                                      or notification of a     or notification of a
                                                                  spaceborne active or     spaceborne active or
                                                                  passive sensor as        passive sensor as
                                                                  defined in Nos. 1.182    defined in Nos. 1.182
                                                                  and 1.183 on board a     and 1.183 on board a
                                                                  non-geostationary        geostationary satellite
                                                                  satellite                network]{.underline}**
                                                                  network]{.underline}**   
  ------------ -------------------------------------------------- ------------------------ ------------------------

**Reasons:** To modify Appendix **4** in order to facilitate the filing
of active and passive sensors as defined in Nos. **1.182** and **1.183**
respectively.

USA/ /02 MOD

ANNEX 2

Characteristics of satellite networks, earth stations\
or radio astronomy stations[^3]     (WRC-03)

### Footnotes to Tables A, B, C and D {#footnotes-to-tables-a-b-c-and-d .heading_b1}

1 Not required for coordination under No. **9.7A**.

2 The most recent version of Recommendation ITU‑R SF.675 should be used
to the extent applicable in calculating the maximum power density per
Hz. For carriers below 15 GHz, the power density is averaged over the
worst 4 kHz band. For carriers at or above 15 GHz, the power density is
averaged over the worst 1 MHz band. In the case of assignments with a
bandwidth less than the stated averaging bandwidth, the maximum density
is calculated as if the assignment occupied the averaging bandwidth.

[3 Required at notification only.]{.underline}

[4 Required only for active sensors, as defined in No. **1.182**, at
notification.]{.underline}

[5 Required only for passive sensors, as defined in No. **1.183**, at
notification.]{.underline}

**Reasons**: Consequential. Definition of footnotes inserted into the
spaceborne active and passive sensor column proposed in USA/ /01 is
required. Due to the fact that active sensors are emitters and passive
sensors are not, certain data elements are applicable only to one type
of sensor.

USA/ /03 MOD

+-----+----------------------------------------------------+------+---+
| Ap  |                                                    |      |   |
| pen |                                                    |      |   |
| dix |                                                    |      |   |
| 4   |                                                    |      |   |
|     |                                                    |      |   |
| *   |                                                    |      |   |
| *Ta |                                                    |      |   |
| ble |                                                    |      |   |
| of  |                                                    |      |   |
| cha |                                                    |      |   |
| rac |                                                    |      |   |
| ter |                                                    |      |   |
| ist |                                                    |      |   |
| ics |                                                    |      |   |
| to  |                                                    |      |   |
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| sub |                                                    |      |   |
| mit |                                                    |      |   |
| ted |                                                    |      |   |
| for |                                                    |      |   |
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| ra  |                                                    |      |   |
| dio |                                                    |      |   |
| ast |                                                    |      |   |
| ron |                                                    |      |   |
| omy |                                                    |      |   |
| s   |                                                    |      |   |
| erv |                                                    |      |   |
| ice |                                                    |      |   |
| s** |                                                    |      |   |
| (W  |                                                    |      |   |
| RC- |                                                    |      |   |
| 03) |                                                    |      |   |
+-----+----------------------------------------------------+------+---+
| *   | ***A ^\_^ GENERAL CHARACTERISTICS OF THE SATELLITE | **   | * |
| *It | NETWORK, EARTH STATION OR RADIO ASTRONOMY          | Noti | * |
| ems | STATION***                                         | fica | N |
| in  |                                                    | tion | o |
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| ppe |                                                    | coor | i |
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|     |                                                    | A)** | a |
|     |                                                    |      | t |
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|     |                                                    |      | y |
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|     |                                                    |      | s |
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|     |                                                    |      | e |
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|     |                                                    |      | i |
|     |                                                    |      | t |
|     |                                                    |      | e |
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|     |                                                    |      | t |
|     |                                                    |      | w |
|     |                                                    |      | o |
|     |                                                    |      | r |
|     |                                                    |      | k |
|     |                                                    |      | * |
|     |                                                    |      | * |
+-----+----------------------------------------------------+------+---+

+-----+----------------------------------------------------+------+---+
| A.1 | the mean power flux-density produced at the        | *    | * |
| 7.d | Earth's surface by any spaceborne sensor, as       | *~~+ | * |
|     | defined in No. **5.549A**                          | ~~** | ~ |
|     |                                                    |      | ~ |
|     |                                                    |      | + |
|     |                                                    |      | ~ |
|     |                                                    |      | ~ |
|     |                                                    |      | * |
|     |                                                    |      | * |
+-----+----------------------------------------------------+------+---+
|     | > Required only for satellite systems operating in |      |   |
|     | > the Earth exploration-satellite service (active) |      |   |
|     | > or space research service (active) in the band   |      |   |
|     | > 35.5-36 GHz                                      |      |   |
+-----+----------------------------------------------------+------+---+

**Reasons:** Consequential. The addition in Appendix **4** of data
element A.17.d in the columns for spaceborne active and passive sensors
as proposed in USA/ /01 makes its inclusion in the coordination and
notification of satellite networks columns redundant. Therefore, it may
be deleted from the two columns shown.

\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

[^1]: See Document 4 (Add.3) at:
    <http://www.itu.int/md/choice_md.asp?id=R03-WRC03-C-0004!A3!MSW-E&lang=e&type=sitems>

[^2]: SRS-on-CD -- see at:
    <http://www.itu.int/ITU-R/software/space/srscdrom/index.html>

[^3]: ^2^ See footnote 1.