当前位置: X-MOL 学术GPS Solut. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Antenna phase center correction differences from robot and chamber calibrations: the case study LEIAR25
GPS Solutions ( IF 4.9 ) Pub Date : 2020-02-11 , DOI: 10.1007/s10291-020-0957-5
Grzegorz Krzan , Karol Dawidowicz , Pawel Wielgosz

In recent years, the Global Navigation Satellite Systems (GNSS) have been intensively modernized, resulting in the introduction of new carrier frequencies for GPS and GLONASS and the development of new satellite systems such as Galileo and BeiDou (BDS). For this reason, the absolute field antenna calibrations performed so far for the two legacy carrier frequencies, the GPS and GLONASS, seem to be insufficient. Hence, all antennas will require a re-calibration of their phase center variations for the new signals to ensure the highest measurement accuracy. Currently, two absolute calibration methods are used to calibrate GNSS antennas: field calibration using a robot and calibration in an anechoic chamber. Unfortunately, differences in these methodologies also result in a disparity in the obtained antenna phase center corrections (PCC). Therefore, we analyze the differences between individual PCC obtained with these two methods, specifically for the Leica AR-25 antenna model (LEIAR25). In addition, the influence of PCC differences on the GNSS-derived position time series for 19 EUREF Permanent GNSS Network (EPN) stations was also assessed. The results show that the calibration method has a noticeable impact on PCC models. PCC differences determined for the ionosphere-free combination may reach up over 20 mm and can be transferred to the position domain. Further tests concerning the positioning accuracy showed that for horizontal coordinates differences between solutions were mostly below 1 mm, exceeding 2 mm only at two stations for the GLONASS solution. However, the height component differences exceeded 5 mm for four, six and six stations out of 19 for the GPS, GLONASS and Galileo solutions, respectively. These differences are strongly dependent on large L2 calibration differences.

中文翻译:

机器人和腔室校准的天线相位中心校正差异:案例研究LEIAR25

近年来,全球导航卫星系统(GNSS)进行了现代化升级,从而为GPS和GLONASS引入了新的载波频率,并开发了伽利略和北斗(BDS)等新的卫星系统。因此,到目前为止,对于两个传统载波频率GPS和GLONASS进行的绝对场天线校准似乎是不够的。因此,所有天线都将需要对新信号的相位中心变化进行重新校准,以确保最高的测量精度。当前,有两种绝对的校准方法用于校准GNSS天线:使用机器人进行现场校准和在消声室内进行校准。不幸的是,这些方法的差异还导致获得的天线相位中心校正(PCC)不一致。因此,我们分析了通过这两种方法获得的各个PCC之间的差异,特别是针对Leica AR-25天线模型(LEIAR25)。此外,还评估了PCC差异对19个EUREF永久GNSS网络(EPN)站的GNSS衍生位置时间序列的影响。结果表明,校正方法对PCC模型有明显的影响。为无电离层组合确定的PCC差异可能会超过20 mm,并且可以转移到位置域。有关定位精度的进一步测试表明,对于水平坐标,解决方案之间的差异大多在1 mm以下,对于GLONASS解决方案,仅在两个站点上才超过2 mm。但是,GPS的19个位置中的四个,六个和六个站的高度分量差超过5 mm,GLONASS和Galileo解决方案分别。这些差异很大程度上取决于较大的L2校准差异。
更新日期:2020-02-11
down
wechat
bug