../ dmsp_15_ephemeris_20110420.txt 22-Jun-2023 00:17 109623 dmsp_16_ephemeris_20110420.txt 22-Jun-2023 00:17 109599 dmsp_17_ephemeris_20110420.txt 22-Jun-2023 00:17 109708 dmsp_18_ephemeris_20110420.txt 22-Jun-2023 00:17 109649