../ dmsp_15_ephemeris_20110928.txt 22-Jun-2023 00:18 109595 dmsp_16_ephemeris_20110928.txt 22-Jun-2023 00:18 109541 dmsp_17_ephemeris_20110928.txt 22-Jun-2023 00:18 109613 dmsp_18_ephemeris_20110928.txt 22-Jun-2023 00:18 109636