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Satellite telemetry of meteorological satellite plays an important role for satellite safety management. In existing system, threshold value is used to monitor the abnormity because of large volumes of data which is collected every three seconds. However, the abnormal data in the threshold range cannot be detected timely. Based on this, in the paper we… (More)
A new tetrahalogenated benzoic acid 4-chloro-2,3,5-trifluorobenzoic acid was synthesized from methyl 2,3,4,5-tetrafluorobenzoate via three steps. The structure of the newly synthesized compound was established by FTIR, NMR, MS and elemental analysis.