../ dmsp_15_ephemeris_20210424.txt 22-Jun-2023 16:29 109609 dmsp_16_ephemeris_20210424.txt 22-Jun-2023 16:29 109648 dmsp_17_ephemeris_20210424.txt 22-Jun-2023 16:29 109595 dmsp_18_ephemeris_20210424.txt 22-Jun-2023 16:29 109624