../ dmsp_15_ephemeris_20201213.txt 22-Jun-2023 00:45 109401 dmsp_16_ephemeris_20201213.txt 22-Jun-2023 00:45 109397 dmsp_17_ephemeris_20201213.txt 22-Jun-2023 00:45 109272 dmsp_18_ephemeris_20201213.txt 22-Jun-2023 00:45 109394