../ dmsp_15_ephemeris_20180712.txt 22-Jun-2023 16:53 109508 dmsp_16_ephemeris_20180712.txt 22-Jun-2023 16:53 109503 dmsp_17_ephemeris_20180712.txt 22-Jun-2023 16:53 109723 dmsp_18_ephemeris_20180712.txt 22-Jun-2023 16:53 109580