../ dmsp_15_ephemeris_20201205.txt 22-Jun-2023 17:01 109392 dmsp_16_ephemeris_20201205.txt 22-Jun-2023 17:01 109500 dmsp_17_ephemeris_20201205.txt 22-Jun-2023 17:01 109304 dmsp_18_ephemeris_20201205.txt 22-Jun-2023 17:01 109297