../ dmsp_15_ephemeris_20210214.txt 22-Jun-2023 00:46 108140 dmsp_16_ephemeris_20210214.txt 22-Jun-2023 00:46 108124 dmsp_17_ephemeris_20210214.txt 22-Jun-2023 00:46 107957 dmsp_18_ephemeris_20210214.txt 22-Jun-2023 00:46 107981