../ dmsp_15_ephemeris_20230318.txt 22-Jun-2023 00:55 108259 dmsp_16_ephemeris_20230318.txt 22-Jun-2023 00:55 108171 dmsp_17_ephemeris_20230318.txt 22-Jun-2023 00:55 108172 dmsp_18_ephemeris_20230318.txt 22-Jun-2023 00:55 108209