../ dmsp_15_ephemeris_20220427.txt 22-Jun-2023 00:51 109606 dmsp_16_ephemeris_20220427.txt 22-Jun-2023 00:51 109598 dmsp_17_ephemeris_20220427.txt 22-Jun-2023 00:51 109627 dmsp_18_ephemeris_20220427.txt 22-Jun-2023 00:51 109527