The Navy Navigation Satellite System - Transit, Scout, Polaris, US Navy 1967, HD Remaster

[@omless]

this is probably the most underrated channel on this platform

[@jimmeyers8960]

This channel is awesome.

[@maksimsmelchak7433]

👍🏻😎🇺🇸

[@jacksonjohnson4182]

I'm gonna need some help with understanding how the relative position to the satellite is computed. The way I think about it, noting when that Doppler curve crosses 0 only tells you when you and the satellite lie in a plane who's normal direction is parallel to the satellite's velocity. This plane would then create an intersection curve with Earth's surface and you now know you lie somewhere on the curve. You could then use the magnitude of the Doppler shift to determine how far from the satellite you are (the further away you are, the smaller the magnitude of the Doppler shift, I think). This still leaves two possible position solutions, one on either side of the "plane" the satellite orbits in. As a position gets closer to being directly underneath the satellite, the difference between these two position solutions would get smaller and perhaps harder to deduce via separate means like a different nav system. Am I missing something? Also, the way I imagine it, you would have to know the inclination of the orbit as well. Do the computers receiving the position data just plot a line from successive 2 min broadcast windows? Clearly the system worked and I just don't quite understand something

[@gianluca.g]

The rotation of the earth provides a second doppler effect which can be used to determine if the ground station is on the left or on the right of the satellite. The doppler curve crosses 0 at the broadcast frequency + fA, where "fA" is the second doppler effect given by the fact that the ground station is either getting closer to the satellite (right side) or moving away from it (left side). Transit satellites are not stationary longitudinally