../ dmsp_15_ephemeris_20110419.txt 22-Jun-2023 00:17 109568 dmsp_16_ephemeris_20110419.txt 22-Jun-2023 00:17 109664 dmsp_17_ephemeris_20110419.txt 22-Jun-2023 00:17 109717 dmsp_18_ephemeris_20110419.txt 22-Jun-2023 00:17 109667