../ dmsp_15_ephemeris_20210828.txt 22-Jun-2023 00:48 109687 dmsp_16_ephemeris_20210828.txt 22-Jun-2023 00:48 109611 dmsp_17_ephemeris_20210828.txt 22-Jun-2023 00:48 109629 dmsp_18_ephemeris_20210828.txt 22-Jun-2023 00:48 109511