../ dmsp_15_ephemeris_20180728.txt 22-Jun-2023 00:38 109511 dmsp_16_ephemeris_20180728.txt 22-Jun-2023 00:38 109670 dmsp_17_ephemeris_20180728.txt 22-Jun-2023 00:38 109612 dmsp_18_ephemeris_20180728.txt 22-Jun-2023 00:38 109603