Comments on: Set up to fail? https://tmfassociates.com/blog/2017/10/16/set-up-to-fail/ Satellites, spectrum and other stuff Tue, 03 Feb 2026 21:36:32 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: mjmarcus https://tmfassociates.com/blog/2017/10/16/set-up-to-fail/comment-page-1/#comment-96292 mjmarcus Mon, 16 Oct 2017 20:18:49 +0000 http://tmfassociates.com/blog/?p=6222#comment-96292 What is puzzling to me is the table prepared by GPS proponents and its choice of parameters. It characterizes the LightSquared/Ligado system by deployment type, distances, and "Max Tolerable EIRP". It appears that the GPS gang has made a set of assumptions about their potential neighbor with respect to antenna height and antenna pattern and will not allow the neighbor to try different technical parameters to be a better neighbor. The GPS gang wants to characterize their system by just 1 parameter. I also recall that FCC and NTIA were supposed to develop long term standards for GPS receiver immunity and don't recall seeing anything come out of that. What is puzzling to me is the table prepared by GPS proponents and its choice of parameters. It characterizes the LightSquared/Ligado system by deployment type, distances, and “Max Tolerable EIRP”. It appears that the GPS gang has made a set of assumptions about their potential neighbor with respect to antenna height and antenna pattern and will not allow the neighbor to try different technical parameters to be a better neighbor. The GPS gang wants to characterize their system by just 1 parameter.

I also recall that FCC and NTIA were supposed to develop long term standards for GPS receiver immunity and don’t recall seeing anything come out of that.

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