../ dmsp_15_ephemeris_20190901.txt 22-Jun-2023 00:41 109651 dmsp_16_ephemeris_20190901.txt 22-Jun-2023 00:41 109613 dmsp_17_ephemeris_20190901.txt 22-Jun-2023 00:41 109737 dmsp_18_ephemeris_20190901.txt 22-Jun-2023 00:41 109713