../ dmsp_15_ephemeris_20200711.txt 22-Jun-2023 00:44 109520 dmsp_16_ephemeris_20200711.txt 22-Jun-2023 00:44 109479 dmsp_17_ephemeris_20200711.txt 22-Jun-2023 00:44 109627 dmsp_18_ephemeris_20200711.txt 22-Jun-2023 00:44 109551