../ dmsp_15_ephemeris_20210207.txt 22-Jun-2023 00:46 108073 dmsp_16_ephemeris_20210207.txt 22-Jun-2023 00:46 108040 dmsp_17_ephemeris_20210207.txt 22-Jun-2023 00:46 107991 dmsp_18_ephemeris_20210207.txt 22-Jun-2023 00:46 108073