../ dmsp_15_ephemeris_20211009.txt 22-Jun-2023 17:04 109626 dmsp_16_ephemeris_20211009.txt 22-Jun-2023 17:04 109566 dmsp_17_ephemeris_20211009.txt 22-Jun-2023 17:04 109535 dmsp_18_ephemeris_20211009.txt 22-Jun-2023 17:04 109674