BKG NTRIP Client(BNC) note

安装

库文件

安装程序所需共享库：

sudo apt-get update && sudo apt-get install -y \qt4-default \libqtwebkit4 \libssl1.0-dev 

• 按提示安装所需库文件

安装 libqtwebkit4

• https://blog.csdn.net/iteye_5593/article/details/82130775

安装 libpng12-0

• https://blog.csdn.net/weixin_44144528/article/details/107095843
• sudo apt install libqt4-svg

运行BNC程序

cd bnc-2.12.17-ubuntu-64bit-shared
chmod +x bnc-2.12.17-ubuntu-64bit-shared  <!--若本身是有可执行属性，可省略此步-->
./bnc-2.12.17-ubuntu-64bit-shared

若三个库文件没有通过以上命令安装成功，可下载相应库文件安装包自行安装

BNC使用

启动

在windows中可将配置文件拖入BNC图标
linux中可用命令行启动

bnc --conf <configFileName> 

说明记录

PPP

• 可处理单/多系统L3、P3或L3&P3无电离层线性组合测距码或测距码和相位观测值
• BNC中所用广播改正是以天线相位中心为参考的
• BNC不能改正相位缠绕(Phase Windup)
• 改正了卫星天线相位中心
• 忽视了卫星天线相位中心变化
• 观测值通过接收机天线相位中心变化和天线
• 忽视了由极移引起的旋转

所需数据流

实时解算

• 观测值数据流
• 广播星历电文
• 包含对广播星历改正的数据流，改正数据流格式必须为RTCM 3格式 若没有广播改正流，则处理模式为SPP

事后解算

• rinex 观测文件、rinex导航文件、由Broadcast Corrections面板输出的广播改正文件(.C文件)
• 若无.C文件，处理模式为SPP

解算结果文件

• .log文件

Each row reports the PPP result of one epoch. It begins with a UTC time stamp (yy-mm-dd hh:mm:ss) which tells us when the result was produced. A second time stamp (yyyy-mm-dd_hh:mm:ss) describes the PPP’s epoch in ‘GPS Time’. It is followed by the derived XYZ position in [m], its North, East and Up displacement compared to an introduced a priori coordinate, and the estimated tropospheric delay [m] (model plus correction).

• .ppp文件
  
  Depending on selected processing options you find ‘GPS Time’ stamps (yyyy-mm-dd_hh:mm:ss.sss) followed by

• SATNUM: Number of satellites per GNSS,

• RES: Code and phase residuals for contributing GNSS systems in [m]
  Given per satellite with cIF/lIF for ionosphere-free linear combination of code/phase observations

• CLK: Receiver clock errors in [m],

• TRP: A priori and correction values of tropospheric zenith delay in [m],

• OFFGLO: Time offset between GPS time and GLONASS time in [m],

• OFFGAL: Time offset between GPS time and Galileo time in [m],

• OFFBDS: Time offset between GPS time and BDS time in [m],

• AMB: L3 biases, also known as ‘floated ambiguities’
  Given per satellite with ‘nEpo’ = number of epochs since last ambiguity reset

• MOUNTPOINT: Here ‘CUT07’ with XYZ position in [m] and dN/dE/dU in [m] for North, East, and Up
  displacements compared to a priori marker coordinates.

注意事项

• 注意保持数据流与软件各项设置相对应。