全球定位系統(tǒng)的介紹外文翻譯-其他專業(yè)(已修改)
2025-02-04 07:30 本頁(yè)面
【正文】 畢 業(yè) 設(shè) 計(jì)（論 文） 外 文 參 考 資 料 及 譯 文 譯文題目： Introduction to the Global Positioning System 全球定位系統(tǒng)的介紹 學(xué)生姓名： 學(xué) 號(hào)： 專 業(yè)： 集成電路設(shè)計(jì)與集成系統(tǒng) 所在學(xué)院： 電子工程學(xué) 院 指導(dǎo)教師： 杜慧敏 職 稱： 教授 201x 年 xx 月 xx 日 Introduction to the Global Positioning System From “Corvallis Microtechnology, Inc. 1996” Chapter One: What is GPS? The Global Positioning System (GPS) is a location system based on a constellation of about 24 satellites orbiting the earth at altitudes of approximately 11,000 miles. GPS was developed by the United States Department of Defense (DOD), for its tremendous application as a military locating utility. The DOD39。s investment in GPS is immense. Billions and billions of dollars have been invested in creating this technology for military uses. However, over the past several years, GPS has proven to be a useful tool in nonmilitary mapping applications as well. GPS satellites are orbited high enough to avoid the problems associated with land based systems, yet can provide accurate positioning 24 hours a day, anywhere in the world. Uncorrected positions determined from GPS satellite signals produce accuracies in the range of 50 to 100 meters. When using a technique called differential correction, users can get positions accurate to within 5 meters or less. Today, many industries are leveraging off the DOD39。s massive underta king. As GPS units are being smaller and less expensive, there are an expanding number of applications for GPS. In transportation applications, GPS assists pilots and drivers in pinpointing their locations and avoiding collisions. Farmers can use GPS to guide equipment and control accurate distribution of fertilizers and other chemicals. Also，GPS is used for providing accurate locations and as a navigation tool for hikers, hunters and boaters. Many would argue that GPS has found its greatest utility in the field of Geographic Information Systems (GIS). With some consideration for error, GPS can provide any point on earth with a unique address (its precise location). A GIS is basically a descriptive database of the earth (or a specific part of the earth). GPS tells you that you are at point X,Y,Z while GIS tells you that X,Y,Z is an oak tree, or a spot in a stream with a pH level of . GPS tells us the where. GIS tells us the what. GPS/GIS is reshaping the way we locate, anize, analyze and map our resources. Chapter Two: Trilateration How GPS Determines a Location In a nutshell, GPS is based on satellite ranging calculating the distances between the receiver and the position of 3 or more satellites (4 or more if elevation is desired) and then applying some good old mathematics. Assuming the positions of the satellites are known, the location of the receiver can be calculated by determining the distance from each of the satellites to the receiver. GPS takes these 3 or more known references and measured distances and triangulates an additional position. As an example, assume that I have asked you to find me at a stationary position bas
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