../ dmsp_15_ephemeris_20121219.txt 22-Jun-2023 00:21 109430 dmsp_16_ephemeris_20121219.txt 22-Jun-2023 00:21 109345 dmsp_17_ephemeris_20121219.txt 22-Jun-2023 00:21 109364 dmsp_18_ephemeris_20121219.txt 22-Jun-2023 00:21 109407