../ dmsp_15_ephemeris_20180317.txt 22-Jun-2023 00:36 108161 dmsp_16_ephemeris_20180317.txt 22-Jun-2023 00:36 108241 dmsp_17_ephemeris_20180317.txt 22-Jun-2023 00:36 108165 dmsp_18_ephemeris_20180317.txt 22-Jun-2023 00:36 108045