../ dmsp_15_ephemeris_20170904.txt 22-Jun-2023 16:50 109522 dmsp_16_ephemeris_20170904.txt 22-Jun-2023 16:50 109632 dmsp_17_ephemeris_20170904.txt 22-Jun-2023 16:50 109874 dmsp_18_ephemeris_20170904.txt 22-Jun-2023 16:50 109657