../ dmsp_15_ephemeris_20121201.txt 22-Jun-2023 00:21 109409 dmsp_16_ephemeris_20121201.txt 22-Jun-2023 00:21 109301 dmsp_17_ephemeris_20121201.txt 22-Jun-2023 00:21 109318 dmsp_18_ephemeris_20121201.txt 22-Jun-2023 00:21 109454