../ dmsp_15_ephemeris_20110514.txt 22-Jun-2023 00:17 109430 dmsp_16_ephemeris_20110514.txt 22-Jun-2023 00:17 109638 dmsp_17_ephemeris_20110514.txt 22-Jun-2023 00:17 109728 dmsp_18_ephemeris_20110514.txt 22-Jun-2023 00:17 109596