../ dmsp_15_ephemeris_20170720.txt 22-Jun-2023 16:26 109576 dmsp_16_ephemeris_20170720.txt 22-Jun-2023 16:26 109575 dmsp_17_ephemeris_20170720.txt 22-Jun-2023 16:26 109575 dmsp_18_ephemeris_20170720.txt 22-Jun-2023 16:26 109629