Standards

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Sylvain Guillet edited this page Jul 25, 2023 · 12 revisions

Standards

System of units

All inputs and outputs values are expressed in international system of units

Identifying object

In IO Astrodynamics an object could be a celestial body, a spacecraft, an instrument and some methods require object id to perform operation.

Identifying rules are based on NAIF ID codes

Barycenters

0 'SOLAR_SYSTEM_BARYCENTER'
0 'SSB'
0 'SOLAR SYSTEM BARYCENTER'
1 'MERCURY_BARYCENTER'
1 'MERCURY BARYCENTER'
2 'VENUS_BARYCENTER'
2 'VENUS BARYCENTER'
3 'EARTH_BARYCENTER'
3 'EMB'
3 'EARTH MOON BARYCENTER'
3 'EARTH-MOON BARYCENTER'
3 'EARTH BARYCENTER'
4 'MARS_BARYCENTER'
4 'MARS BARYCENTER'
5 'JUPITER_BARYCENTER'
5 'JUPITER BARYCENTER'
6 'SATURN_BARYCENTER'
6 'SATURN BARYCENTER'
7 'URANUS_BARYCENTER'
7 'URANUS BARYCENTER'
8 'NEPTUNE_BARYCENTER'
8 'NEPTUNE BARYCENTER'
9 'PLUTO_BARYCENTER'
9 'PLUTO BARYCENTER'
10 'SUN'

Lagrange points

391 'L1'
392 'L2'
394 'L4'
395 'L5'

Planets and moons

Planet id = barycenter id * 100 + 99
Ex. Earth id = 3 * 100 + 99 = 399

Moon id = barycenter id * 100 + n : where n is the satellite number
Ex. Moon id = 3 * 100 + 1 = 301

Spacecrafts

Spacecraft id must be a negative number.
Don't use spacecraft id already used : https://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/req/naif_ids.html#Spacecraft