../ dmsp_15_ephemeris_20210723.txt 22-Jun-2023 00:47 109594 dmsp_16_ephemeris_20210723.txt 22-Jun-2023 00:47 109696 dmsp_17_ephemeris_20210723.txt 22-Jun-2023 00:47 109587 dmsp_18_ephemeris_20210723.txt 22-Jun-2023 00:47 109508