../ dmsp_15_ephemeris_20210411.txt 22-Jun-2023 00:46 109777 dmsp_16_ephemeris_20210411.txt 22-Jun-2023 00:46 109630 dmsp_17_ephemeris_20210411.txt 22-Jun-2023 00:46 109592 dmsp_18_ephemeris_20210411.txt 22-Jun-2023 00:46 109692