../ dmsp_15_ephemeris_20120728.txt 22-Jun-2023 00:20 109438 dmsp_16_ephemeris_20120728.txt 22-Jun-2023 00:20 109594 dmsp_17_ephemeris_20120728.txt 22-Jun-2023 00:20 109666 dmsp_18_ephemeris_20120728.txt 22-Jun-2023 00:20 109552