../ dmsp_15_ephemeris_20210917.txt 22-Jun-2023 16:36 109709 dmsp_16_ephemeris_20210917.txt 22-Jun-2023 16:36 109682 dmsp_17_ephemeris_20210917.txt 22-Jun-2023 16:36 109552 dmsp_18_ephemeris_20210917.txt 22-Jun-2023 16:36 109686