Emlid.com

=== rtk ===
http://diydrones.com/profiles/blogs/autonomous-mission-and-package-delivery-with-rtk-gps-asterx-m-uas 
http://northsurveying.com/index.php/instruments/gnss-rtk-receiver
http://diydrones.com/profiles/blogs/new-software-for-reach-rtk
https://community.emlid.com/t/reachview-2-beta-release/4304
http://diydrones.com/profiles/blogs/smartap-rtk-released , Sky-Drones is introducing SmartAP RTK, this is a perfect addition to the flight controller when positioning precision really matters, it provides centimeter level accuracy. The system is based on the latest UBlox Neo-M8P chipset and is fully integrated across all SmartAP flight controllers and software. Standard telemetry is used to send RTCM corrections via SmartAP GCS http://sky-drones.com/ SmartAP Ground Control Station (GCS) has been officially released for public. Initial system configuration and high-level autonomous mission planning now can be done in one app!
http://diydrones.com/profiles/blogs/tuffwing-integrates-emlid-reach-rtk-gets-4cm-precision-without a manufacturer of affordable aerial mapping systems recently performed integration of Reach RTK to enable making precision maps without use of ground control points. The system was benchmarked by comparing direct georeferenced model with a set of GCPs, used solely for error detection purposes. Achieved lateral RMS error is just 4cm according to the Pix4D quality report. http://www.tuffwing.com/?utm_medium=email&utm_campaign=EMLID
http://diydrones.com/profiles/blogs/autonomous-mission-and-package-delivery-with-rtk-gps-asterx-m-uas , http://www.septentrio.com/ We are testing the RTK GPS receiver from Septentrio, the AsteRX-m UAS with ArduCopter 3.4. The GPS can be used to land accurate as shown in the first part of our video. The land location was logged and loaded into the waypoint file in Mission Planner. In the second part we show an autonomous transportation of a package as possible application. http://www.septentrio.com/insights/look-no-ground-control-points you’ve been asked to survey some points on the ground with centimetre-level accuracy. Feeling confident? How about a few hundred points spread over 7.5 hectares (18.53 acres) and the job has to be done in one afternoon. Throw in the fact that the area you have to survey is in a quarry which has been closed off due to a recent landslide. Still feeling confident? You should and here’s why. 
Improvements in Unmanned Aerial Vehicle (UAV) technology combined with more compact high-end Global Navigation Satellite Systems (GNSS) receivers means that you no longer have to compromise on precision to measure in those hard-to-reach areas.
=== emlid ===
https://community.emlid.com/t/3dr-solo-with-reach/1846/25
http://diydrones.com/profiles/blogs/reach-rtk-gps-can-now-embed-ground-control-points-in-imagery Reach was built with precision mapping applications it mind. One of the big challenges in UAV mapping is eliminating Ground Control Points which are time consuming and costly to place. Reach RTK can help achieve that by synchronizing with the camera shutter on sub ms level. I have written more about this in a previous post. All you need to do is connect hotshoe adapter to your camera and wire it to Reach port. Only two connections are required "GND" and "Time Mark". During RINEX conversion on Reach you will see a new field that will show how many time marks have been collected. That should match the amount of pictures taken by the camera. Those of you who have access to GrafNav can already start mapping and getting accurately georeferenced pictures. Thanks to @Stu74 we know that it parses time marks from RINEX and interpolates the post processed coordinates.
We have also implemented this feature in RTKLIB and will release modified RTKPost soon.
https://emlid.com/reach/
Main function of Reach is to compute precise coordinates. To do so it uses technology called RTK – Real-time kinematics. Two connected receivers within 10km radius are used and static device streams corrections to the moving one. You can simply connect one device to your home router and another one to a smartphone with web access.
RTKLIB is an amazingly powerful open-source software written by Tomoji Tokasu for RTK and postprocessing. Algorithms used to determine accurate position are computational intensive and RTKLIB was mostly used on PCs and laptops. We have created a tiny, yet very powerful module that runs RTKLIB and locates your position with centimeter precision.
https://www.indiegogo.com/projects/navio-autopilot-shield-for-raspberry-pi#/ NAVIO: Autopilot Shield for Raspberry Pi
Control cars, boats, multirotors, planes and other kinds of drones directly from your Raspberry.
=== tersus ===
http://www.tersus-gnss.com/ The latest pilot version of Precis-BX316 RTK board was showed during 7th China Satellite Navigation Conference in May. This version supports GPS L1L2/BDS B1B2/GLONASS G1G2 and with GPS L1L2 heading mode. In addition, it supports up to 20Hz RTK solution output and onboard SD card for raw data logging, which is key for post process and data analysis. Camera shuttle synchronization feature for aerial mapping applications is added as well. They are ideal for UAVs. The official launch of Precis-BX316 will be in Q4 and datasheet is ready now. If you are interested and want to get details of technical specifications, drop us a line to sales@tersus-gnss.com or click Datasheet for Precis-BX316. Stay tuned.
Category:Gps and gprs
Category:Uav project
Category:Intel edison
Category:Real time kinematics
Category:Uav ground mapping