../ dmsp_15_ephemeris_20170715.txt 22-Jun-2023 00:34 109581 dmsp_16_ephemeris_20170715.txt 22-Jun-2023 00:34 109525 dmsp_17_ephemeris_20170715.txt 22-Jun-2023 00:34 109644 dmsp_18_ephemeris_20170715.txt 22-Jun-2023 00:34 109413