I have recently started using S1 SAR and SNAP. I have two specific files that are consecutive but do not mosaic. The resultant file is a just narrow strip. I have used this graph to mosaic four or five pairs previous to these with success.
These are from 05 Feb 2016 and cover an area over Hudson Strait and Ungava Bay.
S1A_EW_GRDM_1SDH_20160205T220738_20160205T220838_009817_00E5DC_1D17
S1A_EW_GRDM_1SDH_20160205T220534_20160205T220638_009817_00E5DC_D341
This is graph I have used:
Any feedback/ advice greatly appreciated.