../ dmsp_15_ephemeris_20210412.txt 22-Jun-2023 16:29 109656 dmsp_16_ephemeris_20210412.txt 22-Jun-2023 16:29 109639 dmsp_17_ephemeris_20210412.txt 22-Jun-2023 16:29 109663 dmsp_18_ephemeris_20210412.txt 22-Jun-2023 16:29 109668