../ dmsp_15_ephemeris_20210923.txt 22-Jun-2023 17:04 109719 dmsp_16_ephemeris_20210923.txt 22-Jun-2023 17:04 109621 dmsp_17_ephemeris_20210923.txt 22-Jun-2023 17:04 109627 dmsp_18_ephemeris_20210923.txt 22-Jun-2023 17:04 109654