../ dmsp_15_ephemeris_20130309.txt 22-Jun-2023 00:21 108275 dmsp_16_ephemeris_20130309.txt 22-Jun-2023 00:21 108123 dmsp_17_ephemeris_20130309.txt 22-Jun-2023 00:21 108145 dmsp_18_ephemeris_20130309.txt 22-Jun-2023 00:21 108163