https://tpm-ds.eo.esa.int/oads/data/Radarsat-1/RS1_OPER_SAR_EL_SGF_19980804T100552_N28-496_E116-175_0000_v0101.SIP.ZIP
https://tpm-ds.eo.esa.int/oads/data/Radarsat-1/RS1_OPER_SAR_SX_SGF_19980722T220510_N28-272_E116-190_0000_v0101.SIP.ZIP