1/ So, feel free to read this thread.https://twitter.com/bara/status/894783903239516160 …
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4/ ...ICBM nav systems, and talking w him extensively re ring laser gyro and other non-GPS (inertial navigation) systems.
5/ I was 10 or so when I had a RLG https://en.wikipedia.org/wiki/Ring_laser_gyroscope … mirror end-cap as a memento. So, anyway, I think the text is ok.
The text is perfectly fine, and the switch from GPS to INS make all the sense in the world. Don't think about changing it for one second! 1/
5/ I specifically wanted the gravel boats to use GPS on their way in bc the distance from the moon to Earth is such that inertial nav errors
6/ would be too high. I can't find the spreadsheet now, but I did the calculation to find out what thousandth-of-a-second-of-angle >
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