../ dmsp_15_ephemeris_20210703.txt 22-Jun-2023 00:47 109573 dmsp_16_ephemeris_20210703.txt 22-Jun-2023 00:47 109561 dmsp_17_ephemeris_20210703.txt 22-Jun-2023 00:47 109587 dmsp_18_ephemeris_20210703.txt 22-Jun-2023 00:47 109423