../ dmsp_15_ephemeris_20210610.txt 22-Jun-2023 00:47 109616 dmsp_16_ephemeris_20210610.txt 22-Jun-2023 00:47 109590 dmsp_17_ephemeris_20210610.txt 22-Jun-2023 00:47 109540 dmsp_18_ephemeris_20210610.txt 22-Jun-2023 00:47 109578