../ dmsp_15_ephemeris_20121218.txt 22-Jun-2023 00:21 109332 dmsp_16_ephemeris_20121218.txt 22-Jun-2023 00:21 109324 dmsp_17_ephemeris_20121218.txt 22-Jun-2023 00:21 109399 dmsp_18_ephemeris_20121218.txt 22-Jun-2023 00:21 109493