../ dmsp_15_ephemeris_20210506.txt 22-Jun-2023 00:47 109608 dmsp_16_ephemeris_20210506.txt 22-Jun-2023 00:47 109596 dmsp_17_ephemeris_20210506.txt 22-Jun-2023 00:47 109607 dmsp_18_ephemeris_20210506.txt 22-Jun-2023 00:47 109471