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安裝中文字典英文字典辭典工具!
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- orbit - Can someone explain to me the TEME reference frame in defining . . .
TEME of Epoch—In this approach, the epoch of the TEME frame is held constant Subsequent rotation matrices must therefore account for the change in precession and nutation from the epoch of the TEME frame to the epoch of the transformation
- orbital mechanics - How to convert TEME (or ITRF) to horizontal . . .
I have TEME coordinates from sgp4 propagation I can convert those (in python) to ITRF given date and time of observation How to convert coordinates from one of those two frames to horizontal azim
- From TEME to RA DEC - Astronomy Stack Exchange
The algorithm computes the positions (X, Y, Z) in the True Equator Mean Equinox coordinate frame (TEME) From that, I would like to find the corresponding RA DEC coordinates at the given epoch I thought this was just a change of frame from Cartesian to spherical coordinates, with RA = arctan (Y X) and DEC = arcsin (Z R)
- Fixing satellite eclipse equations from textbooks that are seemingly . . .
I have tried implementing equations from two different textbooks in Python to find if a satellite is in eclipse, but both fail a significant percentage of the time when tested against data from ind
- Eccentricity of TLE orbit from velocity and radius in TEME
I was reading this question: Calculation of Eccentricity of orbit from velocity and radius and tried to use the proposed equation to reconstruct the ecco field of TLE by it's R,V vectors The formu
- Conversion between Astronomical Frames, ex. IRCF, FK5, FK4, etc…
I'm a little bit confused about reference frames, and I was wondering if someone could help clarify a few things? So let's say I have equatorial coordinates that refer to the mean equator and equi
- fundamental astronomy - Difference between J2000, FK5 and ICRS . . .
I have no background in astronomy I have been wanting to write code to make star charts for a given location and time, which led to this question I figured out that I would need to convert the
- How can I calculate the right ascension of an observer on Earths . . .
I know that calculating the geocentric position of the respective Topos object at a specific time results in a Geocentric object that has an attribute radec; however I am not confident that this delivers the right ascension in the TEME (Earth centered inertial frame
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