../ dmsp_15_ephemeris_20171121.txt 22-Jun-2023 16:51 109565 dmsp_16_ephemeris_20171121.txt 22-Jun-2023 16:51 109426 dmsp_17_ephemeris_20171121.txt 22-Jun-2023 16:51 109429 dmsp_18_ephemeris_20171121.txt 22-Jun-2023 16:51 109287