../ dmsp_15_ephemeris_20130831.txt 22-Jun-2023 00:22 109550 dmsp_16_ephemeris_20130831.txt 22-Jun-2023 00:22 109605 dmsp_17_ephemeris_20130831.txt 22-Jun-2023 00:22 109678 dmsp_18_ephemeris_20130831.txt 22-Jun-2023 00:22 109710