../ dmsp_15_ephemeris_20210818.txt 22-Jun-2023 17:03 109705 dmsp_16_ephemeris_20210818.txt 22-Jun-2023 17:03 109652 dmsp_17_ephemeris_20210818.txt 22-Jun-2023 17:03 109741 dmsp_18_ephemeris_20210818.txt 22-Jun-2023 17:03 109616