../ dmsp_15_ephemeris_20190717.txt 22-Jun-2023 16:31 109501 dmsp_16_ephemeris_20190717.txt 22-Jun-2023 16:31 109488 dmsp_17_ephemeris_20190717.txt 22-Jun-2023 16:31 109488 dmsp_18_ephemeris_20190717.txt 22-Jun-2023 16:31 109447