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pierredv : ligado   11

Response to 5 July 2017 PNT Advisory Board Letter on Ligado Spectrum Proposal
"I was more than puzzled by the July 5, 2017 letter from the PNT Advisory Board (“PNT AB”) about Ligado’s spectrum proposal."
Dennis-Roberson  GPS  Ligado  Interference  harmful-interference 
december 2018 by pierredv
GPS Experts Vote Unanimously to Oppose Ligado's Newest Proposal - Inside GNSS Aug 2018
The NationalSpace-Based Positioning, Navigation, and Timing (PNT) Advisory Board urged opposition to the proposal saying that even if the transmissions’ power was lowered to just under 10 watts it “will create totally unacceptable interference for a great number of GPS users in the United States.”
InsideGNSS  GPS  Ligado 
august 2018 by pierredv
National PNT Engineering Forum rejects Ligado test results : GPS World Mar 2018
"he gap analysis concluded that the results from the first three tests are sufficient and appropriate to inform spectrum policy makers on the major impacts of a proposed LTE network on GPS receivers. The DOT test results revealed the power levels that GPS and GNSS receivers can tolerate from interference sources in the adjacent band in an effort to inform the enforcement of a GPS interference protection criterion."
GPS  Ligado 
march 2018 by pierredv
Telecom, Economic Experts Weigh in on Putting Broadband Near GPS | Inside GNSS
Via Rich Lee
"Inside GNSS has confirmed that Ligado will speak November 15 before the National Space-Based Positioning, Navigation, and Timing (PNT) Advisory Board at its next meeting in Redondo Beach, California. If it can win them over it would be a turning point for the company, which had to file bankruptcy in its previous incarnation as LightSquared and then revise its plans in an effort to ease interference."
GPS  InsideGNSS  Ligado 
november 2017 by pierredv
Impact of LTE Signals on GPS Receivers | NIST
The National Advanced Spectrum and Communications Test Network (NASCTN) has completed the Impacts of LTE Signals on GPS Receivers project and has released the NASCTN report LTE Impacts on GPS (link is external)  along with the measurement data associated with this project.
NIST  NASCTN  Ligado  GPS  LTE  receivers  testing 
march 2017 by pierredv
Surprise GPS Receiver Tests Involving Ligado Spectrum Effort | Inside GNSS Jul 2016
rehearses arguments for C/No vs. location accuracy criteria for LTE/GPS interference
InsideGNSS  GPS  Ligado  LightSquared  NASCTN 
february 2017 by pierredv
Mobile-phone expansion could disrupt key weather satellites : Nature News & Comment - Jul 2016
"As Hurricane Patricia barrelled down on Mexico last October, forecasters at the US National Oceanic and Atmospheric Administration (NOAA) grabbed as many ­satellite images as they could to track its progress. But at least one crucial shot failed to download. A 22 October image from the ­Geostationary Operational Environ­mental Satellite (GOES) system showed a black swathe — no data — across most of the Pacific Ocean. . . . The culprit was radio interference from mobile-phone companies. And the problem may soon get worse."
"In a representative sample of GOES imagery taken between May and September 2015, the agency found that 3.6% of the data ­during that stream had been subject to interference. And in May of this year, NOAA clocked 30 events in which satellite transmissions had dropped out, either streaking or nearly obliterating the images. “We consider that to be unacceptable,” Wissman says."
cellular  satellite  weather  weathersatellite  interference  LightSquared  Ligado  NOAA  GOES  NatureJournal 
july 2016 by pierredv
Rebranded LightSquared still faces barriers to wholesale network rollout - PolicyTracker Feb 2016
The new version of LightSquared, now called Ligado Networks, has settled its dispute with several GPS providers and is seeking spectrum licence modifications from the US regulator. But the company's effort to reinvent itself still needs buy-in from an array of federal agencies, leaving its future uncertain.
LightSquared  Ligado  PolicyTracker  FCC 
february 2016 by pierredv

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