../ dmsp_15_ephemeris_20120921.txt 22-Jun-2023 00:20 109555 dmsp_16_ephemeris_20120921.txt 22-Jun-2023 00:20 109558 dmsp_17_ephemeris_20120921.txt 22-Jun-2023 00:20 109734 dmsp_18_ephemeris_20120921.txt 22-Jun-2023 00:20 109744