../ dmsp_15_ephemeris_20181201.txt 22-Jun-2023 00:39 109363 dmsp_16_ephemeris_20181201.txt 22-Jun-2023 00:39 109365 dmsp_17_ephemeris_20181201.txt 22-Jun-2023 00:39 109395 dmsp_18_ephemeris_20181201.txt 22-Jun-2023 00:39 109280