(window.webpackJsonp=window.webpackJsonp||[]).push([[563],{877:function(t,i,a){"use strict";a.r(i);var e=a(10),s=Object(e.a)({},(function(){var t=this,i=t._self._c;return i("ContentSlotsDistributor",{attrs:{"slot-key":t.$parent.slotKey}},[i("h1",{attrs:{id:"ultimate-accuracy-with-post-processing"}},[i("a",{staticClass:"header-anchor",attrs:{href:"#ultimate-accuracy-with-post-processing"}},[t._v("#")]),t._v(" Ultimate accuracy with post-processing")]),t._v(" "),i("h2",{attrs:{id:"tight-coupling-ppk"}},[i("a",{staticClass:"header-anchor",attrs:{href:"#tight-coupling-ppk"}},[t._v("#")]),t._v(" Tight Coupling PPK")]),t._v(" "),i("p",[t._v("PPK（后处理运动学）是两件事的组合：")]),t._v(" "),i("ul",[i("li",[t._v("在后处理中增加一个基站，即使没有实时使用基站，后处理也应用于GNSS数据。")]),t._v(" "),i("li",[t._v("在最终惯性解上完成的前进/后退和合并。")])]),t._v(" "),i("fdi-img",{attrs:{alt:"MEMS",src:"/knowledge-base/05/050301.png"}}),t._v(" "),i("p",[t._v("这两件事可以显着改善实时记录的数据，特别是对于GNSS中断的应用，例如桥梁测量。")]),t._v(" "),i("p",[t._v("有关实时与后期处理的更多信息，您可以关注")]),t._v(" "),i("h3",{attrs:{id:"what-is-needed"}},[i("a",{staticClass:"header-anchor",attrs:{href:"#what-is-needed"}},[t._v("#")]),t._v(" What is needed")]),t._v(" "),i("p",[t._v("为了获得PPK解决方案，我们需要一个后处理软件，例如Qinertia，来自INS的原始IMU数据，来自GNSS接收器的原始数据，当然所有数据都应该有准确的时间戳。")]),t._v(" "),i("h3",{attrs:{id:"ppk-in-qinertia"}},[i("a",{staticClass:"header-anchor",attrs:{href:"#ppk-in-qinertia"}},[t._v("#")]),t._v(" PPK in Qinertia")]),t._v(" "),i("p",[t._v("PPK 或后处理运动学使用与 RTK 相同的算法，但在后处理环境中。这种操作模式的主要优点是提高了性能，在具有挑战性的条件下最大限度地提高厘米级的可用性。这是可能的，因为在后处理应用程序中不存在 RTCM 更正中断的风险，而且还会影响前向/后向/合并处理的性质。")]),t._v(" "),i("p",[t._v("PPK的另一个关键优势是简化了实时设置，因为无需将RTCM校正馈送到漫游车GNSS。这些更正只需要在基站级别单独记录。")]),t._v(" "),i("p",[t._v("PPK 还可以使用全球可用的 7000+ 开放式接入基站之一执行，进一步简化了实时设置。")]),t._v(" "),i("h4",{attrs:{id:"single-base-station-in-qinertia"}},[i("a",{staticClass:"header-anchor",attrs:{href:"#single-base-station-in-qinertia"}},[t._v("#")]),t._v(" Single base station in Qinertia")]),t._v(" "),i("p",[t._v("In Qinertia, you can either load your own base station data if you had a base station installed during the survey, or you can choose one from a network of available base stations.")]),t._v(" "),i("fdi-img",{attrs:{alt:"MEMS",src:"/knowledge-base/05/050302.png"}}),t._v(" "),i("p",[t._v("Whatever solution you choose, it is possible to do a PPP computation (Precise Point positioning) on the base station to calculate its position accurately. This allows you to make sure the position you entered manually is accurate or to calculate the base station position if not entered correctly in real time for ultimate accuracy.")]),t._v(" "),i("h4",{attrs:{id:"vbs-in-qinertia"}},[i("a",{staticClass:"header-anchor",attrs:{href:"#vbs-in-qinertia"}},[t._v("#")]),t._v(" VBS in Qinertia")]),t._v(" "),i("p",[t._v("The Virtual Base Station concept, developed initially for network RTK providers, can be extended to post-processing, using the freely available base stations.")]),t._v(" "),i("p",[t._v("In case the mission to post-process is too wide for a single baseline RTK processing, or when base stations are too far from the trajectory, it is then possible to use a Virtual Base Station network to enable centimeter level accuracy of the rover position.")]),t._v(" "),i("fdi-img",{attrs:{alt:"MEMS",src:"/knowledge-base/05/050303.png"}}),t._v(" "),i("p",[t._v("Qinertia VBS implementation is particularly efficient in processing VBS networks, with a distance from the rover to the bases easily reaching up to 100km or more. This feature greatly extends the availability of PPK.")]),t._v(" "),i("h2",{attrs:{id:"post-processed-ppp"}},[i("a",{staticClass:"header-anchor",attrs:{href:"#post-processed-ppp"}},[t._v("#")]),t._v(" Post-processed PPP")]),t._v(" "),i("p",[t._v("Precise Point Positioning is an alternative solution in case no base stations were available nearby, and it can change some offshore data to a 10cm accurate position.")]),t._v(" "),i("fdi-math",{attrs:{content:"\\begin{aligned}\nDCM =\\begin{pmatrix}\\cos\\psi&-\\sin\\psi&0\\\\\\sin\\psi&\\cos\\psi&0\\\\0&0&1\\end{pmatrix}\\cdot\\begin{pmatrix}\\cos\\theta&0&\\sin\\theta\\\\0&1&0\\\\-\\sin\\theta&1&\\cos\\theta\\end{pmatrix}\\cdot\\begin{pmatrix}1&0&0\\\\0&\\cos\\varphi&-\\sin\\varphi\\\\0&\\sin\\varphi&\\cos\\varphi\\end{pmatrix}  \\\\\nDCM =\\begin{pmatrix}\\cos\\theta\\cdot\\cos\\psi&\\sin\\varphi\\cdot\\sin\\theta\\cdot\\cos\\psi-\\cos\\varphi\\cdot\\sin\\psi&\\cos\\varphi\\cdot\\sin\\theta\\cdot\\cos\\psi+\\sin\\varphi\\\\\\cos\\theta\\cdot\\sin\\psi&\\sin\\varphi\\cdot\\sin\\theta\\cdot\\sin\\psi+\\cos\\varphi\\cdot\\cos\\psi&\\cos\\varphi\\cdot\\sin\\theta\\cdot\\sin\\psi-\\sin\\varphi\\\\-\\sin\\theta&\\sin\\varphi\\cdot\\cos\\theta&\\cos\\varphi\\cdot\\cos\\theta\\end{pmatrix} \n\\end{aligned}"}})],1)}),[],!1,null,null,null);i.default=s.exports}}]);