../ dmsp_15_ephemeris_20170509.txt 22-Jun-2023 00:34 109487 dmsp_16_ephemeris_20170509.txt 22-Jun-2023 00:34 109523 dmsp_17_ephemeris_20170509.txt 22-Jun-2023 00:34 109690 dmsp_18_ephemeris_20170509.txt 22-Jun-2023 00:34 109643