../ dmsp_15_ephemeris_20111231.txt 22-Jun-2023 00:19 109264 dmsp_16_ephemeris_20111231.txt 22-Jun-2023 00:19 109254 dmsp_17_ephemeris_20111231.txt 22-Jun-2023 00:19 109274 dmsp_18_ephemeris_20111231.txt 22-Jun-2023 00:19 109384