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Medusa Detector Operating System (mDOS)

Introduction

The Medusa Detector Operating System (mDOS) is the software that runs on Medusa gamma-ray spectrometers. It handles all measurement tasks automatically — collecting spectra, logging GPS positions, processing radionuclide concentrations — and makes the data accessible through a web interface you open in any browser. There is no software to install.

This manual describes how to connect to mDOS, conduct a survey, review and download your data, and configure the system to your needs.

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Supported Detectors

This manual applies to all Medusa gamma-ray spectrometers running mDOS V4.x.

Detector

Description

MS-100 UAV

Anthropogenic mapping

MS-350

Ultralight drone and handheld detector

MS-700

Walking detector

MS-1000

Drone-borne detector

MS-2000

Agri detector

MS-4000

Airborne detector

MS-20k

Airborne crystal pack

MS-100 gSMS

Stationary soil moisture sensor (see gSMS)

All Medusa systems produced from April 2021 onward have the electronics to run mDOS.

mDOS version

Build

V4.0

500


What You Need

To use mDOS you need:

  • A powered Medusa detector

  • A device with a modern web browser (computer, tablet, or phone)

  • A network connection between your device and the detector — either via the detector's built-in WiFi access point or via Ethernet

No additional software, drivers, or accounts are required. All configuration and data access happens through the browser interface.


How to Use This Manual

This manual is structured around workflows. Each chapter guides you through a task from start to finish.

If you want to…

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Get connected for the first time

Connecting to the Detector

Understand what you see on screen

Interface Overview

Get up and running as quickly as possible

Your First Measurement

Conduct a full field survey

Conducting a Survey

Review and download your data

Reviewing and Downloading Data

Configure the detector

System, Sensors, WiFi, Map, Communication

Integrate with external software

JSON Format and NMEA Output

Solve a problem

Troubleshooting

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