"Orbit_State_Vectors" in SNAP (SAR data)

Microwave Toolbox
#1

Hi, excuse me for a simple question of “Orbit_State_Vectors” of SAR data in SNAP.
As below, in the “Abstracted_Metadata”, there is a field named “Orbit_State_Vectors”. So what are the values of “x_pos”, “y_pos”, and “z_pos”? Furthermore, what are the units of these values (metre or pixel or …)?
Thank you.

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#2

Those are the the position in meters and velocity in m/s in Earth-fixed coordinate system, see:

https://sentinel.esa.int/documents/247904/351187/GMES_Sentinels_POD_Service_File_Format_Specification

#3

Hi everyone,

I got a question that may sound funny, but why are there 12 orbit vectors? To what does each one correspond exactly? Thank you!

Sohrab