../ dmsp_15_ephemeris_20210727.txt 22-Jun-2023 16:29 109491 dmsp_16_ephemeris_20210727.txt 22-Jun-2023 16:29 109579 dmsp_17_ephemeris_20210727.txt 22-Jun-2023 16:29 109722 dmsp_18_ephemeris_20210727.txt 22-Jun-2023 16:29 109497