../ dmsp_15_ephemeris_20200921.txt 22-Jun-2023 00:45 109591 dmsp_16_ephemeris_20200921.txt 22-Jun-2023 00:45 109677 dmsp_17_ephemeris_20200921.txt 22-Jun-2023 00:45 109629 dmsp_18_ephemeris_20200921.txt 22-Jun-2023 00:45 109476