../ dmsp_15_ephemeris_20180426.txt 22-Jun-2023 00:37 109552 dmsp_16_ephemeris_20180426.txt 22-Jun-2023 00:37 109582 dmsp_17_ephemeris_20180426.txt 22-Jun-2023 00:37 109647 dmsp_18_ephemeris_20180426.txt 22-Jun-2023 00:37 109709