../ dmsp_15_ephemeris_20210118.txt 22-Jun-2023 00:46 107951 dmsp_16_ephemeris_20210118.txt 22-Jun-2023 00:46 107999 dmsp_17_ephemeris_20210118.txt 22-Jun-2023 00:46 107962 dmsp_18_ephemeris_20210118.txt 22-Jun-2023 00:46 107931