A Novel Double Cluster and Principal Component Analysis-Based Optimization Method for the Orbit Design of Earth Observation Satellites

Table 3

Coverage and TT&C indices of orbits O1 and O2.

Index	Orbit O1	Orbit O2
Frequency of coverage (FC)	100	100
Total coverage time (TCT)/s	8445	5970
Average time per coverage (ATC)/s	86	60
Maximum coverage gap (MCG)/s	4213.5	2842.5
Average coverage gap (ACG)/s	1117.75	1162.5
Minimum coverage gap (ICG)/s	486.25	270.75
Average time interval of TT&C (ATI-TT&C)/s	3886	3930
Average time of each TT&C (AT-TT&C)/s	31	38