../ dmsp_15_ephemeris_20190921.txt 22-Jun-2023 00:41 109568 dmsp_16_ephemeris_20190921.txt 22-Jun-2023 00:41 109644 dmsp_17_ephemeris_20190921.txt 22-Jun-2023 00:41 109634 dmsp_18_ephemeris_20190921.txt 22-Jun-2023 00:41 109605