../ dmsp_15_ephemeris_20201101.txt 22-Jun-2023 17:01 109577 dmsp_16_ephemeris_20201101.txt 22-Jun-2023 17:01 109461 dmsp_17_ephemeris_20201101.txt 22-Jun-2023 17:01 109508 dmsp_18_ephemeris_20201101.txt 22-Jun-2023 17:01 109474