../ dmsp_15_ephemeris_20180815.txt 22-Jun-2023 00:38 109504 dmsp_16_ephemeris_20180815.txt 22-Jun-2023 00:38 109585 dmsp_17_ephemeris_20180815.txt 22-Jun-2023 00:38 109699 dmsp_18_ephemeris_20180815.txt 22-Jun-2023 00:38 109623