Study Shows GRB Stations Don't Need big Protection Zones, LightSquared Says

Safeguarding National Oceanic and Atmospheric Administration geostationary operational environmental satellite rebroadcast (GRB) stations from interference would require "relatively small protection zones," LightSquared said in an FCC filing in docket 12-340. LightSquared has been pushing the FCC for reallocation and auction of a slice of NOAA spectrum and for conditions on its spectrum license that would let LightSquared share it for its terrestrial broadband network (see 1512310016). Wednesday's filing updated 2014 LightSquared submissions about NOAA's use of the 1675-1680 MHz band and the compatibility of commercial operations there, which showed the two could coexist by relocating some NOAA radiosondes and establishing defined protection and coordination zones, LightSquared said. But it said that study covered only NOAA's sensor data link in 1673.4-1678.6 MHz and not its GRB link at 1680.6-1692.6. LightSquared also again urged the FCC to issue a public notice on its NOAA spectrum idea (see 1601140037). NOAA didn't comment. In a separate ex parte filing in the docket Wednesday, the company recapped a meeting between CEO Doug Smith and board member Reed Hundt and FCC, NOAA, NTIA and Office of Management and Budget representatives about NOAA sharing 1675-1680 MHz. Some state and local governments and private entities use NOAA signals in or near the spectrum band, LightSquared said, saying it submitted a report to the FCC identifying alternative delivery mechanisms for those non-NOAA entities. LightSquared said the general consensus at the meeting was that the issue needing addressing "is not a matter of technology [but] a matter responsibility, logistics and funding -- issues that could be addressed by the Commission ... through service rules, license conditions and the auction process." An FCC notice-and-comment process would have to identify all use cases, if not necessarily all users, of the band, LightSquared said. In that report, also filed Wednesday, LightSquared said its investigation into non-NOAA users "was limited in scope because the universe of users was unknown." Some of those users include the Data Collection System/Data Collection Platform Report service where NOAA collects weather and environmental data from thousands of sensors around the U.S.; Emergency Managers Weather Information Network, which is used by state and local governments and public safety agencies to receive weather-related NOAA warnings; and geostationary operational environmental satellite variable/GRB, used by some private forecasting services and university research institutions for their forecasting models. Commercial operations wouldn't impinge on DCS/DCPR ability to upload data to NOAA, LightSquared said.