Set Initial State RPO Sequence

The Set Initial State RPO sequence sets the initial Cartesian position and velocity of the chase satellite relative to the reference satellite and also sets the initial epoch. You should only use this sequence once in an RPO mission; it must be at the beginning, after setting the reference vehicle (using the Set Reference Vehicle RPO).

The following picture shows an initial state at -1000 meters on the RBar.

Watch the following video to learn more about the RPO sequence on this page.

Sequence parameters

Option	Description
WhoAmI	Enter, as a string, the name of the current satellite.
Init_Radial_Pos	Enter, in distance units, the initial radial offset from the target.
Init_InTrack_Pos	Enter, in distance units, the initial in-track offset from the target.
Init_CrossTrack_Pos	Enter, in distance units, the initial cross-track offset from the target.
Init_Radial_Vel	Enter the initial radial velocity relative to the target.
Init_InTrack_Vel	Enter the initial in-track velocity relative to the target.
Init_CrossTrack_Vel	Enter the initial cross-track velocity relative to the target.
Initial_Epoch	Enter the initial state epoch in UTCG.
ThisSequence	Enter, as a string, the name of this sequence. This is nominally Set_Initial_State, but if you insert the sequence multiple times in the MCS, Astrogator adds a monotonically increasing number to the end of the name (Set_Initial_State1, Set_Initial_State2, etc.).