../ dmsp_15_ephemeris_20210512.txt 22-Jun-2023 16:29 109647 dmsp_16_ephemeris_20210512.txt 22-Jun-2023 16:29 109471 dmsp_17_ephemeris_20210512.txt 22-Jun-2023 16:29 109621 dmsp_18_ephemeris_20210512.txt 22-Jun-2023 16:29 109476