../ dmsp_15_ephemeris_20180419.txt 22-Jun-2023 00:37 109540 dmsp_16_ephemeris_20180419.txt 22-Jun-2023 00:37 109567 dmsp_17_ephemeris_20180419.txt 22-Jun-2023 00:37 109777 dmsp_18_ephemeris_20180419.txt 22-Jun-2023 00:37 109578