../ dmsp_15_ephemeris_20121230.txt 22-Jun-2023 00:21 109396 dmsp_16_ephemeris_20121230.txt 22-Jun-2023 00:21 109323 dmsp_17_ephemeris_20121230.txt 22-Jun-2023 00:21 109332 dmsp_18_ephemeris_20121230.txt 22-Jun-2023 00:21 109444