../ dmsp_15_ephemeris_20190909.txt 22-Jun-2023 00:41 109629 dmsp_16_ephemeris_20190909.txt 22-Jun-2023 00:41 109650 dmsp_17_ephemeris_20190909.txt 22-Jun-2023 00:41 109711 dmsp_18_ephemeris_20190909.txt 22-Jun-2023 00:41 109599