Goke AGPS User Manual

About this manual

The Goke AGPS User Manual describes the GPD (GPS Positioning Data) implementation used to accelerate GPS chip positioning. It covers the process of downloading GPD files from the Goke server, uploading them via the naviTrack tool, and the communication protocol used over the serial port.

The guide also explains how to delete outdated GPD data, the expected improvement in cold‑start time (10‑15 seconds), and provides detailed packet structures for transmitting GPD data, acknowledgments, and mode switching commands. This manual is written in Chinese.

What's inside

• GPD Introduction
• Obtaining GPD Files
• Using GPD Files
• Deleting GPD Data
• Effect of GPD on Positioning
• GPD Communication Transmission

Specifications

Frequently asked questions

How can I delete GPD data stored in the chip?

Enter the command “PGKC047” in the naviTrack tool’s command input box to clear the GPD data.

How do I obtain GPD files for the AGPS module?

Download the appropriate GPD file from the Goke GPD server website; files are updated every 2 hours.

What improvement does GPD provide for GPS cold‑start time?

Using GPD can reduce cold‑start positioning time by about 10–15 seconds, with greater gains in weak signal conditions.