../ dmsp_15_ephemeris_20210404.txt 22-Jun-2023 00:46 108211 dmsp_16_ephemeris_20210404.txt 22-Jun-2023 00:46 108235 dmsp_17_ephemeris_20210404.txt 22-Jun-2023 00:46 108219 dmsp_18_ephemeris_20210404.txt 22-Jun-2023 00:46 108222