CHCNAV CoProcess 2025: Professional Post-Processing for High-Precision Positioning

CHCNAV CoProcess 2025 is the official post-processing software suite for GNSS and inertial data from CHCNAV and other compatible GNSS receivers and inertial measurement units (IMUs). It is designed for surveyors, geomatics engineers, and mapping professionals who require the highest possible accuracy by processing raw field data in the office, typically achieving centimeter-level positioning for applications like topographic surveys, drone mapping, and mobile mapping.

Core Function: From Raw Measurements to Precise Coordinates
The software’s primary function is to perform Post-Processed Kinematic (PPK) corrections. It combines raw satellite observations logged by a rover receiver with data from a base station (or a network of reference stations) after returning from the field. By processing this data together, it can compute highly accurate positions for the rover’s trajectory, which is especially critical for drone/UAV photogrammetry and mobile mapping where real-time correction signals may be unreliable.

Key Processing Workflows & Features:

1. GNSS Baseline Processing & Network Adjustment

  • Multi-System, Multi-Frequency Processing: Supports GPS, GLONASS, Galileo, BeiDou, and other satellite systems. Utilizes dual/triple-frequency data to resolve ambiguities and achieve high precision.

  • Baseline Processing: Computes accurate vectors between a base station and rover points. Supports static, rapid-static, and kinematic (PPK) survey modes.

  • Network Adjustment: Processes data from multiple base stations in a network to improve accuracy and reliability over large areas.

2. GNSS/IMU Tightly Coupled Processing

  • Inertial Navigation System (INS) Integration: A key advanced feature. It tightly couples raw GNSS observations with raw IMU data (accelerometer and gyroscope measurements). This fusion provides a robust, continuous, and accurate position, velocity, and attitude (roll, pitch, heading) solution, even during short GNSS signal outages (under bridges, in urban canyons, under tree cover).

  • Trajectory Export: Outputs a smooth, high-rate trajectory file that is essential for direct georeferencing in photogrammetry software (like Pix4D, Agisoft) or for mobile mapping point cloud generation.

3. Data Management & Quality Control

  • Data Import & Compatibility: Imports raw data from CHCNAV receivers (like i series, Alpha series), common formats (RINEX), and u-blox receivers.

  • Quality Analysis & Reports: Provides graphical tools to analyze data quality, satellite visibility, and processing results. Generates processing reports