../ dmsp_15_ephemeris_20180807.txt 22-Jun-2023 16:53 109598 dmsp_16_ephemeris_20180807.txt 22-Jun-2023 16:53 109606 dmsp_17_ephemeris_20180807.txt 22-Jun-2023 16:53 109676 dmsp_18_ephemeris_20180807.txt 22-Jun-2023 16:53 109591