Sec. 25.258  Sharing between NGSO MSS Feeder links Stations and GSO FSS 
          services in the 29.25-29.5 GHz Bands.

    (a) Operators of NGSO MSS feeder link earth stations and GSO FSS 
earth stations in the band 29.25 to 29.5 GHz where both services have a 
co-primary allocation shall cooperate fully in order to coordinate their 
systems. During the coordination process both service operators shall 
exchange the necessary technical parameters required for coordination.
    (b) Licensed GSO FSS systems shall, to the maximum extent possible, 
operate with frequency/polarization selections, in the vicinity of 
operational or planned NGSO MSS feeder link earth station complexes, 
that will minimize instances of unacceptable interference to the GSO FSS 
space stations.

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    (c) NGSO MSS satellites operating in this frequency band shall 
compensate for nodal regression due to the oblate shape of the Earth, 
and thus maintain constant successive sub-satellite ground tracks on the 
surface of the Earth.
    (d) NGSO MSS systems applying to use the 29.25-29.5 GHz band, for 
feeder link earth station uplink, will have to demonstrate that their 
system can share with the authorized U.S. GSO/FSS systems operating in 
this band.
[ 61 FR 44181 , Aug. 28, 1996]

                     Subpart D--Technical Operations

    Source:   58 FR 13421 , Mar. 11, 1993, unless otherwise noted.