../ dmsp_15_ephemeris_20170507.txt 22-Jun-2023 00:34 109601 dmsp_16_ephemeris_20170507.txt 22-Jun-2023 00:34 109554 dmsp_17_ephemeris_20170507.txt 22-Jun-2023 00:34 109689 dmsp_18_ephemeris_20170507.txt 22-Jun-2023 00:34 109444