../ dmsp_15_ephemeris_20210305.txt 22-Jun-2023 00:46 108239 dmsp_16_ephemeris_20210305.txt 22-Jun-2023 00:46 108180 dmsp_17_ephemeris_20210305.txt 22-Jun-2023 00:46 108038 dmsp_18_ephemeris_20210305.txt 22-Jun-2023 00:46 108144