301 - This repository has been moved to the eagletrt organization.

eagletrt-ubx-parser

A nodejs program for @eagletrt to parse GGA GLL and RMC messages of ubx files to csv or json.

Project purpose

The telemetry of eagletrt uses two high-precision GPS, one as base-station and another in the car as a rover. The rover GPS data are parsed by the telemetry and saved in a local mongodb. The base-station saves instead a raw ubx log file. The purpose of this project is making easy to parse the wanted data (latitude, longitude timestamp altitude and speed) and save it in an easy-handable format such as json and csv.

How it was made

The project is a very simple NodeJS program and uses no third-party module but chalk for a colourful log.

How to use it

To use this parser:

• Clone this repo
• Install nodejs
• Navigate to the root folder of this project
• Execute npm i
• Move the ubx file which are to be exported in the /inputs folder
• Open the config.json file, it will contain two properties:
  • TYPE is the output format. It can be CSV or JSON
  • INPUTS is an array containing the name (without extension) of the file in the inputs folder that are to be parsed
• Change the config.json file as wanted
• Execute npm start, the parsed file will be in the outputs/csv or outputs/json folder

Notes

From the ubx only the GGA, GLL and RMC messages are considered.

Only the latitude longitude timestamp altitude speed and course properties are kept.

The coordinates are converted in a more suitable format, that can be used directly for instance on Google Earth.

Not all messages contain every parameter. In general, every parameter that is not contained in a message is set to NaN.