../ dmsp_15_ephemeris_20200518.txt 22-Jun-2023 00:44 109542 dmsp_16_ephemeris_20200518.txt 22-Jun-2023 00:44 109559 dmsp_17_ephemeris_20200518.txt 22-Jun-2023 00:44 109508 dmsp_18_ephemeris_20200518.txt 22-Jun-2023 00:44 109511