of National High Technology Research and Development Program of China(No.2012AA101902);Chinese Universities Scientific Fund(No.2014RC015);Science&Technology Pillar Program of Tianjin(14ZCZDNC00004);Science and Technology for Xinjiang(No.2011AB024)。
Although Global Navigation Satellite System(GNSS)terminal has been widely used for fleet management,it cannot satisfy the need of managing changes of laborer and implement during farm operation,which are important for...