../ dmsp_15_ephemeris_20210911.txt 22-Jun-2023 00:48 109734 dmsp_16_ephemeris_20210911.txt 22-Jun-2023 00:48 109688 dmsp_17_ephemeris_20210911.txt 22-Jun-2023 00:48 109637 dmsp_18_ephemeris_20210911.txt 22-Jun-2023 00:48 109669