PPK mapping with centimeter accuracy. Use fewer GCPs
Why camera synchronization is so important?
Usually autopilot triggers the camera and records the coordinate it has at that moment. When the drone is flying at 20 m/s and GPS works at 5 Hz, that means your autopilot will have position readings only each 4 m, which is not suitable for precise georeferencing. In addition, there is always a delay between the trigger and the actual moment the photo is taken.
Reach eliminates the delay
Reach solves the problem of positioning by connecting directly to the camera hot shoe port, which is synced with the shutter. The time and coordinates of each photo are logged with a resolution of less than a microsecond. This method allows GCPs to be used only to check your accuracy.
1.
Connect Reach to a hot shoe port on a camera
Every time a photo is taken 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, get 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
Process RINEX files using free RTKLIB software. The produced file with precise coordinates of the photos can be used for georeferencing.
NTRIP or another Reach as a base station
To calculate centimeter-precise coordinates in PPK and RTK, Reach needs corrections from a base station. It could be either another Reach receiver or an NTRIP service. VRS is also supported.
Compatibility
Reach M2 and M+ work seamlessly with other Reach receivers over any link and are compatible with any other receiver that supports RTCM3 and NTRIP.
Choosing between
Reach M+ and Reach M2
Reach M+
and Reach RS+
If you work within short baselines, then Reach M+ is an optimal choice.
Reach M2
and Reach RS2+
Provides robust performance and quick initialization, allowing work on long baselines.
Up to 10 km
Up to 60 km
Up to 20 km
Up to 100 km
1-2 min
5 sec
Single-band
Multi-band
update rate
Up to 14 Hz
Up to 10 Hz
Comes
with Emlid Flow app
The most user-friendly software for data collection that is available both for Android and iOS. Supports thousands of coordinate systems and is translated into multiple 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
Reach can trigger cameras as well as register events. The event mark feature is a must for aerial mapping as it allows the precise time when the shutter was activated to be registered.
Simple log
management
Logs are automatically recorded directly to RINEX in the internal memory. 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.
Reach in action
3DroneMapping completes PPK trials with the average zero mean error in all axes
Luke Wijnberg, 3DroneMapping
As a brief synopsis of the results, the maximum deviation of points was no more than 0.09m in all axes. This is an incredible result given the fact that the average pixel size of the resulting imagery was 0.045m. The average mean error in all axes is just few mm!
Tuffwing gets 4cm precision without GCPs with Emlid Reach RTK
Brian Christal, Tuffwing
Tuffwing recently performed integration of Emlid Reach RTK to enable precision maps to be made without the use of GCPs. The system has been benchmarked by comparing a direct georeferenced model with a set of GCPs, used solely for error detection purposes. The lateral RMS error achieved is just 4cm according to the Pix4D quality report.
Event38 integrates Emlid Reach and starts providing a ready-to-go PPK mapping solution
Jeff Taylor, Event38
In this case study, we produced an orthomosaic in the Drone Data Management System™ with 2.45cm horizontal and 5.08cm vertical RMSE, as compared with a survey-grade GPS on the ground.
Reach
in the Emlid Store
Emlid Flow app and all features of Reach receivers are included
Delivery worldwide.
2-5 days by DHL, up to 3 weeks by airpost.
Specifications
Mechanical
- Dimensions 56.4 x 45.3 x 14.6 mm
- Weight 35 g
- Operating tº -20 to +65 ºC
Electrical
-
Power supply voltage on
USB or JST-GH connectors 4.75 - 5.5 V - Antenna DC bias 3.3 V
- Typical current consumption @5V 300 mA
Positioning
- Static horizontal 4 mm + 0.5 ppm
- Static vertical 8 mm + 1 ppm
- Kinematic horizontal 7 mm + 1 ppm
- Kinematic vertical 14 mm + 1 ppm
Connectivity
- LoRa radio (sold separately)
- Frequency range 868/915 MHz
- Distance Up to 8 km
- Wi-Fi 802.11 b/g/n
- Bluetooth 4.0/2.1 EDR
- Ports USB, UART, Event
Data
- Corrections NTRIP, VRS, RTCM3
- Position output NMEA, LLH/XYZ
-
Data logging
RINEX with events
with update rate up to 10 Hz - Internal storage 16 GB
GNSS
-
Signal tracked
GPS/QZSS L1C/A, L2C
GLONASS L1OF, L2OF
BeiDou B1I, B2I
Galileo E1B/C, E5b - Number of channels 184
- Update rates 10 Hz GNSS
- IMU 9DOF
Mechanical
- Dimensions 56.4 x 45.3 x 14.6 mm
- Weight 35 g
- Operating tº -20 to +65 ºC
Electrical
-
Power supply voltage on USB
or JST-GH connectors 4.75 - 5.5 V - Antenna DC bias 3.3 V
- Typical current consumption @5V 250 mA
Positioning
- Static horizontal 5 mm + 1 ppm
- Static vertical 10 mm + 2 ppm
- Kinematic horizontal 7 mm + 1 ppm
- Kinematic vertical 14 mm + 2 ppm
Connectivity
- LoRa radio (sold separately)
- Frequency range 868/915 MHz
- Distance Up to 8 km
- Wi-Fi 802.11 b/g/n
- Bluetooth 4.0/2.1 EDR
- Ports USB, UART, Event
Data
- Corrections NTRIP, VRS, RTCM3
- Position output NMEA, LLH/XYZ
-
Data logging
RINEX with events
with update rate up to 14 Hz - Internal storage 8 GB
GNSS
-
Signal tracked
GPS/QZSS L1, GLONASS G1,
BeiDou B1, Galileo E1, SBAS - Number of channels 72
- Update rates 14 Hz/5 Hz
- IMU 9DOF
Have a question?
Ask our team
Email us at info@emlid.com or fill in the contact form. Our application engineers will reply to you within a working day
(9:00-18:00 CET).