../ dmsp_15_ephemeris_20210812.txt 22-Jun-2023 16:36 109656 dmsp_16_ephemeris_20210812.txt 22-Jun-2023 16:36 109615 dmsp_17_ephemeris_20210812.txt 22-Jun-2023 16:36 109689 dmsp_18_ephemeris_20210812.txt 22-Jun-2023 16:36 109490