../ dmsp_15_ephemeris_20180711.txt 22-Jun-2023 00:37 109506 dmsp_16_ephemeris_20180711.txt 22-Jun-2023 00:37 109505 dmsp_17_ephemeris_20180711.txt 22-Jun-2023 00:37 109534 dmsp_18_ephemeris_20180711.txt 22-Jun-2023 00:37 109565