../ dmsp_15_ephemeris_20170627.txt 22-Jun-2023 16:49 109600 dmsp_16_ephemeris_20170627.txt 22-Jun-2023 16:49 109564 dmsp_17_ephemeris_20170627.txt 22-Jun-2023 16:49 109649 dmsp_18_ephemeris_20170627.txt 22-Jun-2023 16:49 109502