FCC 25.259 Revised as of October 1, 2007
Goto Year:2006 |
2008
Sec. 25.259 Time sharing between NOAA meteorological satellite systems and
non-voice, non-geostationary satellite systems in the 137–138 MHz band.
(a) A non-voice, non-geostationary mobile-satellite service system licensee
(“NVNG licensee”) time-sharing spectrum in the 137–138 MHz frequency band
shall not transmit signals into the “protection areas” of National Oceanic
and Atmospheric Administration (“NOAA”) satellite systems. When calculating
the protection areas for a NOAA satellite in the 137.333–137.367 MHz,
137.485–137.515 MHz, 137.605–137.635 MHz and 137.753–137.787 MHz bands, a
NVNG licensee shall use an earth station elevation angle of five degrees
towards the NOAA satellite and will cease its transmissions prior to the
NVNG licensee's service area, based on an elevation angle of zero degrees
towards the NVNG licensee's satellite, overlapping the NOAA protection area.
When calculating the protection areas for a NOAA satellite in the
137.025–137.175 MHz and 137.825–138 MHz bands, a NVNG licensee shall use an
earth station elevation angle of zero degrees, or less if reasonably
necessary, towards the NOAA satellite and will cease its transmissions prior
to the NVNG licensee's service area, based on an elevation angle of zero
degrees towards the NVNG licensee's satellite, overlapping the NOAA
protection area. A NVNG licensee is responsible for obtaining the necessary
ephemeris data. This information shall be updated system-wide on at least a
weekly basis. A NVNG licensee shall use an orbital propagator algorithm with
an accuracy equal to or greater than the NORAD propagator used by NOAA.
(b) A NVNG licensee time sharing spectrum in the 137–138 MHz band shall
establish a 24-hour per day contact person and telephone number so that
claims of harmful interference into NOAA earth station users and other
operational issues can be reported and resolved expeditiously. This contact
information shall be made available to NOAA or its designee. If the National
Telecommunications and Information Administration (“NTIA”) notifies the
Commission that NOAA is receiving unacceptable interference from a NVNG
licensee, the Commission will require such NVNG licensee to terminate its
interfering operations immediately unless it demonstrates to the
Commission's reasonable satisfaction, and that of NTIA, that it is not
responsible for causing harmful interference into the worldwide NOAA system.
A NVNG licensee assumes the risk of any liability or damage that it and its
directors, officers, employees, affiliates, agents and subcontractors may
incur or suffer in connection with an interruption of its non-voice,
non-geostationary mobile-satellite service, in whole or in part, arising
from or relating to its compliance or noncompliance with the requirements of
this paragraph (b). The Commission will not hesitate to impose sanctions on
a NVNG licensee time-sharing spectrum in the 137–138 MHz band with NOAA,
including monetary forfeitures and license revocations, when appropriate.
(c) Each satellite in a NVNG licensee's system time-sharing spectrum with
NOAA in the 137–138 MHz band shall automatically turn off and cease
satellite transmissions if, after 72 consecutive hours, no reset signal is
received from the NVNG licensee's gateway earth station and verified by the
satellite. All satellites in such NVNG licensee's system shall be capable of
instantaneous shutdown on any sub-band upon command from such NVNG
licensee's gateway earth station.
[ 62 FR 59296 , Nov. 3, 1997]
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