../ dmsp_15_ephemeris_20210310.txt 22-Jun-2023 00:46 108169 dmsp_16_ephemeris_20210310.txt 22-Jun-2023 00:46 108253 dmsp_17_ephemeris_20210310.txt 22-Jun-2023 00:46 108133 dmsp_18_ephemeris_20210310.txt 22-Jun-2023 00:46 108153