# Post processing This page covers how to process raw observations from a base station, change base station coordinates in Cube-A, and export GCPs for use in LiDARMill or Spatial Explorer. **If your base station was not placed on a known point** during collection of GCPs, your base station's raw observations will need to be post processed in order to obtain a more precise position. A precise base position solution can then be input into Cube-A to shift the location of all GCPs in response to this new base position. {% hint style="info" %} If you placed your base station over a known point during GCP collection, you can skip to the end of this section on [exporting GCPs from Cube-A](https://docs.phoenixlidar.com/hardware/stonex-s-900-and-cube-a/post-processing/export-points-from-cube-a) {% endhint %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.phoenixlidar.com/gnss-hardware-and-ground-control/stonex-s-900-and-cube-a/post-processing.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.