../ dmsp_15_ephemeris_20170412.txt 22-Jun-2023 16:25 109583 dmsp_16_ephemeris_20170412.txt 22-Jun-2023 16:25 109604 dmsp_17_ephemeris_20170412.txt 22-Jun-2023 16:25 109776 dmsp_18_ephemeris_20170412.txt 22-Jun-2023 16:25 109738