../ dmsp_15_ephemeris_20170510.txt 22-Jun-2023 00:34 109448 dmsp_16_ephemeris_20170510.txt 22-Jun-2023 00:34 109621 dmsp_17_ephemeris_20170510.txt 22-Jun-2023 00:34 109692 dmsp_18_ephemeris_20170510.txt 22-Jun-2023 00:34 109631