PPK module
for drone mapping

Deliver centimeter-precise maps with Reach M2 on a drone. Map wherever you need with less ground control points.



PPK Mapping in the Arctic. Water and Ice
Research Laboratory, Carleton University

Precise georeferencing
with less ground control points

Save your time and reach remote areas

Reach onboard a drone allows you to drastically cut the number of ground control points (GCPs) this simplifies the setup process on-site and accurately maps even remote areas.

Why camera synchronization
is so important?

Usually, the 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 only have position readings every 4 m, which is not suitable for precise georeferencing. There is also 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 only be used to check your accuracy.

How to get

Connect Reach to a hot shoe port on a camera

Connect Reach to a hot shoe port on a camera

Every time a photo is taken the camera produces a pulse on a flash hot-shoe connector which is synced to a shutter opening.

Fly a drone, Reach will record photo events

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.

Download logs from Reach and base station

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).

Process logs and get a file with geotags of photos

Process logs and get a file with geotags
of photos

Process RINEX files using Emlid Studio. The file is created with precise coordinates of the photos and can be used for georeferencing.


To ensure smooth synchronization of Reach and a camera, we recommend you use the Reach M2 hot shoe adapter. You can get it in Online Store with UAV kit or separately.

Our PPK modules are fully compatible with most cameras with hot shoe including

  • Sony A6000
  • Nikon D3200
  • Canon EOS 4000D
  • Canon EOS 700D DSLR
  • Ricoh GR III
  • Sony Alpha A7R III
  • Samsung NX1000
Android and iOS

Comes with the Emlid Flow app
and cloud-based service Emlid Flow 360

Emlid Flow is a mobile app for iOS and Android. The app handles all the fieldwork—receiver settings and data collection. All survey data is in sync with cloud-based service Emlid Flow 360, which allows you to access your projects from the browser and manage survey data.


Logs are automatically recorded in the RINEX format for further post-processing. View a list of the logs and download them using the Emlid Flow app.
For PPK, you can use our free software Emlid Studio.


Emlid Flow shows current satellite levels and your location on a map. It allows you to easily access full information about the receiver: battery charge, type of Internet connection, and receiver solution status.

Work with different background maps

Upload topographic maps, cadastral plans, and aerial imagery from WMS and WMTS sources or work with a built-in satellite map.

Managing projects in the cloud

The Emlid Flow app is synchronized with the Emlid Flow 360 service. This allows you to create and access survey projects, manage coordinate systems, and export and import data using both the mobile app and the cloud service at

Reach is designed for harsh conditions Reach is designed for harsh conditions

to be tough

Reach receivers are designed to work in challenging conditions, even in frosty and dusty areas, under the burning sun

-20 to

+65 ºС

We extensively tested Reach M2 in conditions that simulate coldest winters and hottest summers.

User reviews

Luke Wijnberg

CEO of 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.


Drones for Aerial Mapping

Tuffwing performed integration of Emlid Reach RTK to enable precision maps to be made without the use of GCPs. The lateral RMS error achieved is just 4cm according to the Pix4D quality report.

Event 38

Drone Manufacturer

With the M2 integrated into the E400 mapping drone, we created an orthomosaic and DSM with 0.98 cm horizontal and 2.29 cm vertical RMSE. The M2 beats all the other GNSS solutions we have used in the past.

Reach in
the Emlid Store

The basic features of Emlid Flow are available for free to all Emlid users.

Shipping from Chicago

2-3 days by USPS Priority Mail Express
2-7 days by FedEx, UPS

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Reach M2 Datasheet
622 kb


  • Dimensions 56.4 x 45.3 x 14.6 mm
  • Weight 35 g
  • Operating tº -20 to +65 ºC


  • 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


  • 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


  • 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


  • 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


  • Signal tracked GPS/QZSS L1C/A, L2C
    BeiDou B1I, B2I
    Galileo E1B/C, E5b
  • Number of channels 184
  • Update rates 10 Hz GNSS

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Ask our team

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(9:00-18:00 CET).

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Toll Free: 888-454-1916

Direct Dial: +1 817 865 3334 (ex. 101)

Emlid Tech Kft.