../ dmsp_15_ephemeris_20210418.txt 22-Jun-2023 00:46 109660 dmsp_16_ephemeris_20210418.txt 22-Jun-2023 00:46 109596 dmsp_17_ephemeris_20210418.txt 22-Jun-2023 00:46 109754 dmsp_18_ephemeris_20210418.txt 22-Jun-2023 00:46 109631