../ dmsp_15_ephemeris_20180729.txt 22-Jun-2023 00:38 109486 dmsp_16_ephemeris_20180729.txt 22-Jun-2023 00:38 109607 dmsp_17_ephemeris_20180729.txt 22-Jun-2023 00:38 109602 dmsp_18_ephemeris_20180729.txt 22-Jun-2023 00:38 109656