../ dmsp_15_ephemeris_20210509.txt 22-Jun-2023 00:47 109671 dmsp_16_ephemeris_20210509.txt 22-Jun-2023 00:47 109661 dmsp_17_ephemeris_20210509.txt 22-Jun-2023 00:47 109662 dmsp_18_ephemeris_20210509.txt 22-Jun-2023 00:47 109430