../ dmsp_15_ephemeris_20200521.txt 22-Jun-2023 00:44 109645 dmsp_16_ephemeris_20200521.txt 22-Jun-2023 00:44 109489 dmsp_17_ephemeris_20200521.txt 22-Jun-2023 00:44 109587 dmsp_18_ephemeris_20200521.txt 22-Jun-2023 00:44 109559