Table 2.

used PS InSAR datasets.

Sensor	Geometry	Time interval	No. of scenes	Density (PS/km2)
ERS 1/2	Ascending	11/09/92–05/06/00	34	6.55
ERS 1/2	Descending	01/05/92–08/01/01	70	46.45
ENVISAT	Ascending	22/01/03–22/09/10	65	64.74
ENVISAT	Descending	07/07/03–13/09/10	49	20.41
RADARSAT	Ascending	30/012/05–26/01/10	47	85.86
RADARSAT	Descending	31/01/06–03/02/10	47	85.86
COSMOSky-Med	Descending	16/05/11–02/05/12	32	400.62
TERRASar-X	Descending	28/10/11–22/09/12	30	813