Autonomous Orbit Determination for a Hybrid Constellation

Table 4

Average RMS errors of 100 Monte Carlo runs for different orbit determination scenarios.

	RMS error
	LEO layer satellite		MEO layer satellite
	Position (m)	Velocity (cm/s)	Position (m)	Velocity (cm/s)
Image	14.22	1.75	—	—
Image + altimeter (ocean)	32.77	3.32	—	—
Image + altimeter (the geometer calibration site)	8.34	0.96	—	—
Image + altimeter (the geometer calibration site) + inter-satellite range	3.94	0.41	9.06	0.38