../ dmsp_15_ephemeris_20170725.txt 22-Jun-2023 00:34 109560 dmsp_16_ephemeris_20170725.txt 22-Jun-2023 00:34 109495 dmsp_17_ephemeris_20170725.txt 22-Jun-2023 00:34 109712 dmsp_18_ephemeris_20170725.txt 22-Jun-2023 00:34 109639