../ dmsp_15_ephemeris_20211006.txt 22-Jun-2023 16:36 109593 dmsp_16_ephemeris_20211006.txt 22-Jun-2023 16:36 109580 dmsp_17_ephemeris_20211006.txt 22-Jun-2023 16:36 109461 dmsp_18_ephemeris_20211006.txt 22-Jun-2023 16:36 109499