Description
Why camera synchronization is so important
Imagine you are flying your drone at 20m/s with a GPS that works at 5Hz. This means a typical autopilot trigger for your camera will only record position readings every 4m. In addition, there is always a delay between the trigger and the moment the photo is taken, which prevents you from capturing the accurate georeferencing you need.
Reach eliminates the delay
To provide accurate georeferencing, the Reach M2 connects directly to the camera hot shoe port, which is synced with the shutter. This method allows GCPs to be used only to check the accuracy of your survey, whilst logging the time and coordinates of each photo at a resolution of less than a microsecond.
PPK workflow
1. Connect Reach to a hot shoe port on a camera
When a photo is taken, the camera produces a pulse on a flash hot-shoe connector which is synced to a shutter opening.
2. Fly a drone, Reach will record photo events
Reach captures flash sync pulses with sub-microsecond resolution and stores them in a raw data RINEX log in the internal memory.
3. Download logs from Reach and base station
After the flight, you can download the RINEX logs from your airborne Reach module and a base station (Reach RS, CORS or another receiver).
4. Process logs and get a file with geotags of photos
Using the free Emlid Studio software process RINEX files to produce a file that contains precise coordinates of the photos, which can be used for georeferencing.
NTRIP or another Reach as a base station
Reach needs corrections from a base station in PPK and RTK, to determine centimetre-precise coordinates. It could be either another Reach receiver or an NTRIP service. VRS is also supported.
RTK
Up to 60km
PPK
Up to 100km
Time to fix
5 seconds
RINEX logging update rate
Up to 20Hz (coming with a software update, up to 10 Hz now)
Comes with the Emlid Flow app
Emlid Flow is the most user-friendly data collection software that is available for Android and iOS, supports thousands of coordinate systems and has been translated into many languages. With Emlid Flow, you can control all the features of Reach receivers, such as setting up a base station, logging RINEX data, and configuring NMEA output.
Camera control
As well as trigger cameras, the Emlid Reach M2 can register events. The event mark feature is a must for aerial mapping as it records the precise time the shutter was activated..
Simple log management
Logs are automatically recorded directly to RINEX in the internal memory. Users can view a list of the logs and download them using the Emlid Flow app.
Monitoring data
Emlid Flow shows current satellite levels, your location on a map, and much more.
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