Questions tagged [ecef]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
4 votes
1 answer
248 views

In which direction does the x axis of the ECI at 1.1.2000 at 12:00 (J2000) go and where is the 0 deg meridian?

I am currently getting a bit lost in reference frames and coordinate systems. From my point of view, I am currently in the ICRS frame. I know that the ECI from my point is only moving but not rotating,...
user avatar
  • 430
2 votes
1 answer
727 views

Converting J2000 to ECEF?

Say I get the orbital elements for the ISS from JPL Horizons. Say that data is expressed in J2000, an inertial frame. I want to express it in ECEF. This is a simple rotation transform. All I need is ...
user avatar
2 votes
2 answers
294 views

Is it posible to convert JPL Horizons Vectors to ECEF?

I'm needing to accurately find the sun and moon position in ECEF and I'm wanting to make use of JPL's Horisons VECTORS to do this. What data should I export from the web interface and how should I ...
user avatar
1 vote
0 answers
26 views

Calculating angular deviation from LEO magnetic field

The situation I need to calculate pointing errors for a satellite that points along Earth's magnetic field. The satellite's position and orientation are given to me w.r.t ECI J2000. The orientation is ...
user avatar
1 vote
1 answer
149 views

Earth magnetic field vector in ECEF

I've this problem... 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: D: ...
user avatar
  • 11
6 votes
4 answers
2k views

Are ECI and ECEF both frames and/or coordinate systems? Is there a difference?

I don't know really know the difference between a frame and a coordinate system. I'd proposed ECEF and ECI tags, do we need them? Frames seems to be the standard in meta but there is concern so any ...
user avatar
  • 148k
3 votes
3 answers
911 views

Is this commonly attributed ECI (Earth-Centered Inertial) to ECEF (Earth-Centered Earth-Fixed) transformation accurate?

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 steps and considerations (...
user avatar
  • 983
4 votes
1 answer
1k views

C/Fortran library for ECI to ECEF conversion

Does anyone know of a good C or fortran library which constructs the rotation matrix to convert from ECI to ECEF components?
user avatar
  • 183