Are ECI and ECEF Frames, and Do They Belong to the Geocentric ...
Dec 11, 2023 · All three are centered on the Earth. But ECI is fixed relative to the distant stars, ECEF is fixed relative to the Earth's surface, and geocentric doesn't specify a fixed orientation. …
orbital mechanics - Are ECI and ECEF both frames and/or …
Nov 7, 2020 · I'd always thought that ECI and ECEF were the same thing except one rotated and the other didn't. They were two cartesian coordinate systems centered on the geocenter with …
Is this commonly attributed ECI (Earth-Centered Inertial) to ECEF ...
Apr 1, 2020 · As noted in this previous Stack Exchange question, and many others like it, the transformation from ECI to ECEF (or vice versa) is not a simple process, requiring several …
Transform ECI to ECEF - Space Exploration Stack Exchange
Sep 14, 2019 · I need to transform ECI to ECEF coordinate. Here, I need the formula in math and algorithm. I have looking for the formula in the internet, but I can find one. I have x, y, z …
Where do I find ECEF coordinates of a satellite?
Jun 18, 2022 · Where do I find ECEF coordinates of a satellite? You don't "find it." That information is not published. You'll have to compute it rather than find it. What is published for …
Algorithm to convert from ECEF coordinates to ECI coordinates
There isn't a single ECI frame; there are many to choose from (see e.g. ). This choice will effect the conversion. Once you've chosen a suitable frame, you essentially just need to know the …
How to calculate the ECEF coordinates of a satellite given its ...
Sep 29, 2022 · So I am looking for a way to 'reverse engineer' satellite ECEF coordinates given its angles of elevation and azimuth and given the coordinates of an object on Earth serving as a …
How to calculate Earth's velocity vector in ECEF?
Apr 27, 2016 · Yes, ECEF mean Earth Centred, Earth Fixed. And, yes Earth is not moving relative to itself, but Earth velocity vector is moving in that reference frame, because of Earth's rotation …
Earth magnetic field vector in ECEF - Space Exploration Stack …
Jan 19, 2021 · I want to express the earth magnetic field vector in ECEF reference frame. As now I've just found some models for computing these values related to the earth magnetic field:
python - Converting ECEF acceleration to ECI in Astropy? - Space ...
Jul 1, 2025 · I am using Astropy to convert between and ECEF frame and an ECI one, I can do this happily with position and velocity by creating a CartesianRepresentation object with the …