../ dmsp_15_ephemeris_20210923.txt 22-Jun-2023 00:48 109719 dmsp_16_ephemeris_20210923.txt 22-Jun-2023 00:48 109621 dmsp_17_ephemeris_20210923.txt 22-Jun-2023 00:48 109627 dmsp_18_ephemeris_20210923.txt 22-Jun-2023 00:48 109654