../ dmsp_15_ephemeris_20121227.txt 22-Jun-2023 00:21 109428 dmsp_16_ephemeris_20121227.txt 22-Jun-2023 00:21 109245 dmsp_17_ephemeris_20121227.txt 22-Jun-2023 00:21 109349 dmsp_18_ephemeris_20121227.txt 22-Jun-2023 00:21 109386