../ dmsp_15_ephemeris_20101213.txt 22-Jun-2023 00:16 109247 dmsp_16_ephemeris_20101213.txt 22-Jun-2023 00:16 109274 dmsp_17_ephemeris_20101213.txt 22-Jun-2023 00:16 109319 dmsp_18_ephemeris_20101213.txt 22-Jun-2023 00:16 109380