WU Jizhong. Propagation Delay Induced by Antenna Snow Cover Using PPP Technology[J]. Geomatics and Information Science of Wuhan University, 2012, 37(5): 617-620.
Citation: WU Jizhong. Propagation Delay Induced by Antenna Snow Cover Using PPP Technology[J]. Geomatics and Information Science of Wuhan University, 2012, 37(5): 617-620.

Propagation Delay Induced by Antenna Snow Cover Using PPP Technology

Funds: 武汉大学地球空间环境与大地测量教育部重点实验室开放研究基金资助项目(10-01-12);;江西省数字国土重点实验室开放基金资助项目(DLLJ201105)
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  • Received Date: March 14, 2012
  • Published Date: May 04, 2012
  • The purpose of this investigation is to illustrate the effects of receiver antenna snow accumulation on GPS phase observables.Firstly,the effects of snow cover on carrier phase signal field strength and power are analyzed.Then a simplified model is developed to estimate GPS phase propagation delay due to the complicated mixing ratio of snow and resultant complex refractivity.The theoretical analysis revealed that the magnitude of propagation delay,which can be significant in high-accuracy GPS applications,depends on satellite elevation,the water content of snow and snow depth.At last,the daily coordinates of two stations with ten continuous days of GPS observations are estimated using precise point positioning technology.The results indicate that antenna snow cover have an effect on the antenna phase center,and induce horizontal and vertical errors of several centimeters or even more.
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