Garmin and Iridium Renewing Their Opposition to Ligado TLPS Plans

Garmin and Iridium brought concerns about Ligado's broadband terrestrial low-power service plans to meetings with Wireless Bureau and eighth-floor staff, said FCC docket 11-109 filings posted Tuesday. Recapping a meeting with an aide to Commissioner Jessica Rosenworcel, Garmin said it discussed its worries about Ligado interference with Garmin's certified aviation devices. It repeated its oft-made argument in favor of the 1 dB standard for determining harmful interference to GPS receivers. Iridium -- recapping meetings with the Office of Engineering and Technology, the Wireless and International bureaus and the offices of Chairman Ajit Pai and Commissioners Brendan Carr and Jessica Rosenworcel (see here, here, here, here, here and here) -- said it repeated its technical analysis findings (see 1609020029 and 1612140061) that Ligado's L-band operations would cause significant harmful out-of-band emission interference to Iridium's mobile terminals. It said Ligado's proposed OOBE limit at 1626.5 MHz doesn't provide enough interference protection. It said the FCC shouldn't grant Ligado's application on its 1627.5-1637.5 MHz plans but that if it does, it must impose conditions to ensure enough interference protection for Iridium services. Ligado didn't comment.