../ dmsp_15_ephemeris_20210401.txt 22-Jun-2023 00:46 108170 dmsp_16_ephemeris_20210401.txt 22-Jun-2023 00:46 108242 dmsp_17_ephemeris_20210401.txt 22-Jun-2023 00:46 108097 dmsp_18_ephemeris_20210401.txt 22-Jun-2023 00:46 108157