../ dmsp_15_ephemeris_20180609.txt 22-Jun-2023 00:37 109523 dmsp_16_ephemeris_20180609.txt 22-Jun-2023 00:37 109559 dmsp_17_ephemeris_20180609.txt 22-Jun-2023 00:37 109723 dmsp_18_ephemeris_20180609.txt 22-Jun-2023 00:37 109640