../ dmsp_15_ephemeris_20130111.txt 22-Jun-2023 00:21 108000 dmsp_16_ephemeris_20130111.txt 22-Jun-2023 00:21 107825 dmsp_17_ephemeris_20130111.txt 22-Jun-2023 00:21 107972 dmsp_18_ephemeris_20130111.txt 22-Jun-2023 00:21 107988