../ dmsp_15_ephemeris_20101211.txt 22-Jun-2023 00:16 109321 dmsp_16_ephemeris_20101211.txt 22-Jun-2023 00:16 109382 dmsp_17_ephemeris_20101211.txt 22-Jun-2023 00:16 109344 dmsp_18_ephemeris_20101211.txt 22-Jun-2023 00:16 109484