../ dmsp_15_ephemeris_20210301.txt 22-Jun-2023 00:46 108031 dmsp_16_ephemeris_20210301.txt 22-Jun-2023 00:46 108202 dmsp_17_ephemeris_20210301.txt 22-Jun-2023 00:46 107968 dmsp_18_ephemeris_20210301.txt 22-Jun-2023 00:46 108176