Restart WingtraHub. Select the WingtraPilotProjects folder and go to the processing page again.
You can now unplug the orange dongle - keep it at a safe location in case you want to process PPK data on another machine in future.
For your sample project, make sure the option "PPK processing" is activated. Select the base files (RINEX). You can find them in the Base folder beside the
WingtraPilotProjects folder. WingtraHub displays the 3 files only once - select it and WingtraHub will use all three for processing.
Define the base location. The base location needs to be provided in WGS84 coordinates with ellipsoidal height or in Cartesian coordinates. For the sample project,
you can find the coordinates in a text file within the /base folder. Manually add a new base station with the coordinates and give it a descriptive name - WingtraHub
will remember your base stations.
Start processing and observe the processing steps. For batch processing of several projects, WingtraHub will automatically process one project after the other.
Have a look at your results. Navigate to /WingtraProjects/sample_project/OUTPUT and inspect the geotag pdf report, the geotags.csv file and the geotagged images.
Use the images and the csv for processing in Pix4D, Agisoft Photoscan or alike.
Finished! Go flying and process your first PPK projects
Now that you successfully completed the WingtraOne PPK tutorial, you are ready for your first real project. Take your system to perform one or several flight(s), insert the
camera SD card to your computer, select the /WingtraProjects folder on the SD card and run geotagging accordingly. For different options how to provide your base files
(RINEX) and base location check out the next section.
Your base station options
Option 1: Use subscription to a CORS or VRS network
In most parts of the world there exist "Continously Operating Reference Station (CORS)" networks. They consist of a number of fixedly installed base stations to which you
can subscribe. They offer web services that let you download base files and base location. Download RINEX files from the nearest CORS base station in your network.
The base location is normally given in a local coordinate system. Make sure you use an exact conversion between your local coordinates and WGS84 with ellipsoidal
height.
Alternatively, most of the networks offer a "Virtual Reference Station (VRS)" option, that interpolates the correction data of several nearby CORS stations to further
improve the accuracy of your project.
Option 2: Use your own RTK enabled base station
If you want to use your own RTK GNSS base station, place it at an open space when arriving at the field. Measure the base location with the device and make sure to
save the coordinates. Start logging of a RINEX file before you takeoff for the first flight and log continuously until after your last landing. Depending on the base station
model, you will log the RINEX file to an SD card in the receiver or stream it to a laptop or mobile device.
Option 3: Use your own non-RTK base station and place it on top of a point with known coordinates
If you own a GNSS base station that is not RTK enabled, you need to provide the base location manually. This can be done by placing the base station on top of a point
with known coordinates. Make sure you know the height of the pole to calculate the base location based on the known coordinates. The base location is defined at the
GNSS receiver antenna center. Arriving on the field, place the base station on top of the known location and start logging before taking off for the first flight. Depending on
the base station model, you will log the RINEX file to an SD card in the receiver or stream it to a laptop or mobile device.
Option 4: Use your own non-RTK base station and use third party applications to calculate the base location in
retrospect
In case options 1-3 are not available and you own a GNSS base station, you have the additional option to calculate the base location in retrospect using third party
software. For this workflow, place the base station once arriving on the field, configure the GNSS receiver as base station and start logging. Depending on the base station
model, you will log the RINEX file to an SD card in the receiver or stream it to a laptop or mobile device. In order to get sufficiently accurate results, the static GNSS
observation time should be at least one hour. Earliest two days after your flights, you can upload the RINEX files to an online GNSS data processing facility that uses
earth-wide orbit, clock and earth rotation corrections to estimate the base location in retrospect.
A widely used third party software that works world-wide is the Australian service Auspos. Upload your RINEX files earliest two days after the data collection and you will
get back the base location with a detailed report via email.
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