../ dmsp_15_ephemeris_20210207.txt 22-Jun-2023 16:28 108073 dmsp_16_ephemeris_20210207.txt 22-Jun-2023 16:28 108040 dmsp_17_ephemeris_20210207.txt 22-Jun-2023 16:28 107991 dmsp_18_ephemeris_20210207.txt 22-Jun-2023 16:28 108073