satkit-data 0.9.0

Datafiles for the Satellite Orbital Dynamics Toolkit, Updated February 23 2026

Satellite Tookit Data Package

This package contains necessary data files for the Satellite Toolkit, "satkit", python data package.

The files include:

• leap-seconds.list
  A list of the UTC leap seconds since 1972. This is a common file in *nix platforms and is used to keep track of the number of seconds (currently 37) that UTC lags TAI

• linux_p1550p2650.440
  File containing the precice ephemerides of the planets and 400 large asteroids between the years 1550 and 2650, as modelled by the Jet Propulsion Laboraotry (JPL). Note: this file is large -- approx. 100 MB.

• tab5.2a.txt, tab5.2b.txt, tab5.2d.txt
  Tables from IERS Conventions Technical Note 36, containng coefficients used in the precice rotation between the inertial International Celestial Reference Frame and the Earth-fixed International Terrestrial Reference Frame.

• EGM96.gfc, JGM2.gfc, JGM3.gfc, ITU-GRACE16.gfc
  Files containing gravity coefficients for various gravity models. These are used to compute the precise acceleration due to Earth gravity as a function of position in the Earth-fixed ITRF frame.

• SW-All.csv
  Space Weather. The solar flux at $\lambda~=~10.7cm$ (2800 Mhz) is an indication of solar activity, which in turn is an important predictor of air density at altitudes relevant for low-Earth orbits. This file is updated at celestrack.org every 3 hours with the most-recent space weather information.

• EOP-All.csv
  Earth orientation parameters. This includes $\Delta UT1$, the difference between $UT1$ and $UTC$, as well as $x_p$ and $y_p$, the polar "wander" of the Earth rotation axis. This file is updated daily with most-recent values at celestrak.org