user avatar
user avatar
user avatar
Brandon Rhodes
  • Member for 7 years, 2 months
  • Last seen more than a month ago
9 votes
Accepted

How to get earth-centered, earth-fixed coordinates from Skyfield?

3 votes
Accepted

Why can n2yo somehow interpret this TLE but Skyfield can't? Why does it return nans and zeros for position?

5 votes

Nuances of the terms (mean / osculating / Keplerian / orbital) elements

1 vote
Accepted

Ephemeris for lunar body-centered body-fixed coordinates?

2 votes

How to calculate cone angle between two satellites given their look angles?

33 votes
Accepted

Is 75 meters an exceptionally close distance for two satellites to pass at >6,000 m/s?

1 vote
Accepted

How to (correctly) rotate this data so the Ecliptic is in the XY plane?

1 vote

Asteroid 2013 TX68 March 5, 2016 close approach, and calculating with Skyfield

11 votes

How to obtain UTC of the epoch time in a satellite TLE (two line element)?

8 votes

Time, UTC, Julian Date, TLE epoch - how are they related quantitatively?