A new networkmonitoring system formeteorologicaldata collecting and sending is designed and implemented based onmetadata technique.To a greatextent, the system solved the problem ofmeteorologicaldata transfer from observation station to the provincial meteorological bureau, and to nationalmeteorological administration through amethod of automated real-timemonitoring. System fully took into account the various types ofmeteorologicaldata transmission characteristics (frequency ofobservation, transmission time limitations, file naming, etc. ) and provided awide range ofdata displaymode. In addition tomonitoring transmission time, transmission type, transmission station, timing diagrams, GISmap, the system also providedmultiple functions such as voice alarm forabnormaldata, SMS notification and transmission quality statistics and evaluation. Through trial operation in the actual operations, the system obtained a very good effectand greatly reduce the staff’sworkload. At the same time, the system’s stability, scalability and function features have been tested and are shown as an outstanding performance. The results of trial operation also showed that the system could
meet currentmeteorological operation and provide a good interface for the future expansion.

Using three meteorological factors such as temperature, average wind speed, relative humiditymeasured by automatic weather station in real - time as the basic parameters, the critical meteorological index for freezing and melting of wind sensor in automatic weather station was established. The wind - driven sensor antifreezing heating device was controlled for automatic operation through the PC - RS232 communication interface, ATmega8 - based single - chip and op toelectronic isolation circuit, which would realize the goal of the wind sensor antifreezeing p rotection in automatic weather station.

Based on the data ofwheat stripe rust observation, the meteorological data from seven weather stations and the data ofwinter wheat growth periods in different districts of Tianshui during 1994 - 2006, the characteristics ofwheat stripe rust development and the relation between meteorological factors and winterwheat growth period were analyzed with the method of statistics. The results show that the occurring area ofwinter stripe rust p resented linear increase trend after 1994 with the globalwarming. The ep idemic of stripe rust depends on both localmeteorological condition and stripe rust develop ing trend in periphery area. The model for the stripe rust forecast wasmade and this p rovide some help for active p revention of stripe rust and scientific decision of winterwheat p roduction.