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                                                                                                                                                                      RTK、GPS、GNSS有什么區別,什么是GNSS

                                                                                                                                                                        這個用來定位的儀器,有人叫它GPS

                                                                                                                                                                      也有人叫它RT

                                                                                                                                                                      還有人說這是GNSS,不是GPS也不是RTK

                                                                                                                                                                      針對以上幾個關鍵詞,我們探討一下什么稱呼才是正確合理的

                                                                                                                                                                      1、首先來我們看看什么叫GPS

                                                                                                                                                                      GPS是英文Global Positioning System(全球定位系統)的簡稱。

                                                                                                                                                                      利用GPS定位衛星,在全球范圍內實時進行定位、導航的系統,稱為全球衛星定位系統,簡稱GPS。GPS是由美國國防部研制建立的一種具有全方位、全天候、全時段、高精度的衛星導航系統,能為全球用戶提供低成本、高精度的三維位置、速度和精確定時等導航信息,是衛星通信技術在導航領域的應用典范,它極大地提高了地球社會的信息化水平,有力地推動了數字經濟的發展。

                                                                                                                                                                      2、RTK是一種實時定位技術,什么是RTK?

                                                                                                                                                                      RTK(Real - time kinematic,實時動態)載波相位差分技術,是實時處理兩個測量站載波相位觀測量的差分方法,將基準站采集的載波相位發給用戶接收機,進行求差解算坐標。這是一種新的常用的衛星定位測量方法,以前的靜態、快速靜態、動態測量都需要事后進行解算才能獲得厘米級的精度,而RTK是能夠在野外實時得到厘米級定位精度的測量方法,它采用了載波相位動態實時差分方法,是GPS應用的重大里程碑,它的出現為工程放樣、地形測圖,各種控制測量帶來了新的測量原理和方法,極大地提高了作業效率。

                                                                                                                                                                      3、GNSS是全球四大定位系統的組合

                                                                                                                                                                      GNSS的全稱是全球導航衛星系統(Global Navigation Satellite System),它是泛指所有的衛星導航系統,包括全球的、區域的和增強的,如美國的GPS、俄羅斯的Glonass、歐洲的Galileo、中國的北斗衛星導航系統,以及相關的增強系統,如美國的WAAS(廣域增強系統)、歐洲的EGNOS(歐洲靜地導航重疊系統)和日本的MSAS(多功能運輸衛星增強系統)等,還涵蓋在建和以后要建設的其他衛星導航系統。國際GNSS系統是個多系統、多層面、多模式的復雜組合系統。

                                                                                                                                                                       

                                                                                                                                                                      總結

                                                                                                                                                                      GPS:GPS是最早的全球定位系統,所以現在好多人把任何用于衛星定位的技術都統稱為GPS,包括手機定位、車載定位等等。但是中海達V90是四星系統收到的衛星不只是GPS,包括現在發力北斗系統,將來完善的伽利略系統。

                                                                                                                                                                      RTK:RTK技術是能夠實時獲取地物厘米級的三維坐標,而且V90用于道路測量、放樣測量、施工測量、水上定位等等方面,全部都是利用此技術,基本上99%的時間都用于RTK模式測量,所以大家都習慣把它喊成RTK。

                                                                                                                                                                      GNSS:而實際上V90是一款GNSS接收機,他利用四種全球定位系統,實現網絡和電臺完整的RTK系統解決方案,還可以接收靜態數據用于PPK解算系統,真是多功能的綜合體。

                                                                                                                                                                       

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