../ dmsp_15_ephemeris_20120401.txt 22-Jun-2023 00:19 108180 dmsp_16_ephemeris_20120401.txt 22-Jun-2023 00:19 108218 dmsp_17_ephemeris_20120401.txt 22-Jun-2023 00:19 108257 dmsp_18_ephemeris_20120401.txt 22-Jun-2023 00:19 108197