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Questions regarding the path of a point directly below an object in space.

2 votes
1 answer
88 views

TLE propagation, I don't understand which time should I use in (t - t_0)?

I'm trying to plot ground tracks with the help of TLE data. However, there are some equations that contain "times", and I can't understand which time I should use and format. Like for example, TLE Epo …
ed190's user avatar
  • 103
0 votes
0 answers
78 views

How can I plot ground tracks on the surface of the Moon?

I'm curious if there's a module or Python library capable of plotting ground tracks on the Moon's surface, similar to how Skyfield or Astropy functions. I understand that Two-Line Elements (TLEs) are …
ed190's user avatar
  • 103
1 vote
0 answers
197 views

How to convert Geocentric Coordinates to ECEF using Skyfield?

I'm trying to obtain ECEF coordinates from geocentric coordinates and then plot the ground track using the subpoint function. Any advice? My objective is to create an accurate ground track. Additional …
ed190's user avatar
  • 103
1 vote
0 answers
145 views

How does the Gpredict software algorithm track satellites?

I was wondering how Gpredict calculates the ground tracks, Lat, Long and elevation based on a ground station. If I understand correctly, Gpredict takes the values from a TLE (Two-Line Element) set, th …
ed190's user avatar
  • 103