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Copyright of Geomatics & Information Science of Wuhan University is the property of Geomatics & Information Science of Wuhan University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In the Global Positioning System (GPS), the receiver hardware-induced code and phase biases are important factors affecting precise timing, precise modeling of ionosphere and un-difference ambiguity resolution. In the estimation and modeling of ionospheric electron content, it is generally assumed that the GPS receiver hardware biases are constant amounts, without considering the possible fluctuations and influencing factors. Therefore, to analyze the time-varying characteristics of receiver hardware biases can help improve the accuracy and reliability of the ionospheric electron content estimation. In this paper, the time-varying characteristics of single-epoch and single-day solved GPS receiver differential code bias (DCB) and differential phase bias (DPB) are analyzed, and the correlation between the variation of receiver hard⁃ ware delay and the change of ambient temperature is explored experimentally. The results indicate that re⁃ ceiver DCB will mutate after a restart. And after restarting, the receiver DCB and DPB have a changing process, which takes about 25 min, afterwards they keep stabilized. Also, it’s worth noting that the receiv⁃ er DCB and DPB cannot be stable for a long time. The experimental results show that the change of receiv⁃ er DCB and DPB can reach about 0.8 m and 4 mm in 2-3 h. In addition, the fluctuation of receiver hard⁃ ware delay has a strong correlation with the change of the vicinity temperature. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Agro-Environment Science is the property of Journal of Agro-Environment Science Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)