../ dmsp_15_ephemeris_20180930.txt 22-Jun-2023 00:38 109709 dmsp_16_ephemeris_20180930.txt 22-Jun-2023 00:38 109582 dmsp_17_ephemeris_20180930.txt 22-Jun-2023 00:38 109676 dmsp_18_ephemeris_20180930.txt 22-Jun-2023 00:38 109519