The Correction Model Research Of Rtk Net Ionosphere And Troposphere

Nowadays troposphere and ionosphere delay is the main error to impact the GPS positioning accuracy to further improves, but it is also the main error to affect the RTK positioning accuracy and effective distance. In order to improve the continuous operation of reference station for positioning accuracy and effective distance, this text researches on the high-precision correction models of troposphere and ionosphere delay in GPS signals and the real-time fitting method of regional troposphere and ionosphere systematically, mainly refers to the basic research on related knowledge of troposphere and ionosphere and the solving theory of ionosphere and troposphere delay.With the several parts about research methods, as well as the application scope of troposphere and ionosphere delay correction models, the author tries to study the compact of troposphere and ionosphere delay in the atmosphere to the positioning of GPS continuous operation reference station comprehensively and deeply, and also lays the groundwork for further research in the future.This text mainly includes three parts:First, it introduces and sums up the description about research background and related basic research systematically, laying the foundation for the research, relating to the following mainly: the study purpose and the significance as well as the major domestic and international research method fruits on troposphere and ionosphere delay error in the GPS positioning in the atmosphere.Second, it studies the systemic theory methods of the continuous operation reference station for real-time dynamic positioning and the advantages and disadvantages compared to routine RTK, etc.Third, the main body of this article is the correction theories and methods as well as the related contents study on ionosphere and troposphere delay, including mainly:1. Having studied the basic concepts of ionosphere and troposphere, analyzed the producing reasons of ionosphere and troposphere delay, and also studied the basic principles of delay correction.2. Having researched on several correction models, the ionosphere mainly uses dual-band correction method, the troposphere mainly uses several correction models such as Hopfield model and Saastamoinen model as well as Brandt model.3. Having studied the correction method of ionosphere and troposphere about the continuous operation reference station for real-time dynamic positioning, they are mainly surface fitting, weighted distance, multi-faceted function, and so on.