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黑河翻译公司关键字：Currently, the global GPS receiver manufacturers are about 67, producing more than 500 types of receivers, application of the patent of thousands of items. China's ocean-going vessels in the fishing boats and equipment are also about 18 million units of receiving equipment.In 2000, the global GPS industry output value reached 85 billion U.S. dollars, providing about 10 million jobs, experts estimate that in 2005 total output value of U.S. $ 60 billion.Russia, EU and China also joined the competition in the industry. Ongoing and planned program of a Russian navigation constellation GLONASS, the European Union's Galileo program and China's Compass program.The industry's products are: applicable to all situations, different uses of the receivers, and other products combine to form a more extensive use of products such as geographic information systems combined with the car map navigation system, combined with mobile phone set up communications, navigation, positioning in a mobile phone.(4) space remote sensingRemote sensing is the second space satellite communications and satellite navigation applications after the third. Currently running around the Earth remote sensing satellite ground including meteorology, resources, mapping, marine, environmental monitoring satellite. They constantly sent back to the atmosphere, oceans and land resources of images and data for weather forecasting, agriculture, forestry management, marine fisheries resources survey, disaster monitoring provides a wealth of information essential to daily life.Current to electromagnetic waves, including the vast majority of remote sensing band-band products, including visible, infrared, microwave-band images and data. According to the foreign price, the price per square kilometer for the satellite images of U.S. $ 30-40. According to United Nations projections, global remote sensing and geographic information system annual output value reached 40-50 billion dollars.According to the calculations, the U.S. weather satellite applications in agriculture production and reduce disaster losses, benefit from $ 2 billion annually, the input-output ratio of 1:7, a value of 1:10 in the former Soviet Union.Use of remote sensing technology for crop yield estimation has been made with satisfactory results. From the mid-1980s, China has selected winter wheat, corn and rice and other major crops for production and area forecasts. During the provincial (or regional) in a large area yield estimation of wheat yield estimation accuracy of better than 95%, 90% better than corn, rice is better than 85%.
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