../ dmsp_15_ephemeris_20210426.txt 22-Jun-2023 00:46 109679 dmsp_16_ephemeris_20210426.txt 22-Jun-2023 00:46 109598 dmsp_17_ephemeris_20210426.txt 22-Jun-2023 00:46 109644 dmsp_18_ephemeris_20210426.txt 22-Jun-2023 00:46 109479