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Go script to download GPS Ephemeris Data for Sony Cameras
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Sony GPS Ephemeris Data Download Tool

This is a simple tool to download the latest GPS Ephemeris data (GPS prediction or assistme file) onto a Sony Cyber-shot camera (tested on the Sony DSC HX90V) on a Mac computer.

This tool is needed because the Sony PlayMemories software, which is normally responsible for updating the GPS data, is not yet compatible with macOS 10.13.


Download a compiled binary from the releases page or install and build:

go get
go install

Run the script passing in the mount location of the SD card or camera (in this example the SD card is called Untitled and is mounted in the /Volumes folder, where MacOS mounts SD cards by default):

assistme /Volumes/Untitled
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