../ dmsp_15_ephemeris_20121101.txt 22-Jun-2023 00:21 109496 dmsp_16_ephemeris_20121101.txt 22-Jun-2023 00:21 109479 dmsp_17_ephemeris_20121101.txt 22-Jun-2023 00:21 109468 dmsp_18_ephemeris_20121101.txt 22-Jun-2023 00:21 109426