Infotech Finland5 May 2017 19:48
They have been researching KMK tech. They attached KMK sensors to wires and attaché to helicopters so radiation can be detected on the ground. And it worked well.
"NORDUM Exercise
NORDUM (Intercomparison of Nordic unmanned aerial monitoring platforms) exercise was organized in the Hauerseter Leir military campsite, Gardermoen, Norway. The NKS-B activity NORDUM is the first joint Nordic exercise for unmanned systems. All in all, five teams participated in this event coming from different universities and radiation safety related institutions located in Norway, Sweden and Finland.
In the NORDUM exercise, the objective was to locate and identify potential radioactive materials from the arranged scenario areas. The scenario areas varied from cluttered areas containing large shipping containers and various metal structures to open field and forest scenarios. For the measurements, a stand-alone sensor package was constructed containing a RTK (Real Time Kinematic) capable GPS (u-blox C94-M8P-3), measurement computer (Raspberry Pi 3 Model B), a 433 MHz (3DR) radio, a 3.7V Li-ion battery and a gamma radiation spectrometer (Kromek GR1-A).
In the arranged scenarios, the teams needed to localize hidden radiation sources and visualize their location utilizing GPS. In the scenarios, the constructed stand-alone sensor package performed well in most scenarios, although some radio link related issues were encountered especially near large metal structures. The utilized Kromek GR1-A was sensitive enough that radiation sources could also be identified from local spectrum histograms when enough flybys near the radiation source was made.
The stand-alone sensor package was carried with a DJI Inspire 1 T600 quadcopter, hanging 1.5 meters below the vehicle. This made possible manoeuvring the sensor very close to the objects being measured. The quadcopter had a flight time of 10 minutes with a 5.7 Ah 22.2V Li-ion flight battery and the sensor package. The 4k resolution camera was utilized during flight to observe the sensor position and to manoeuver it to wanted positions. Although the conditions were rather windy, flying with the sensor package was manageable. The quadcopter with the sensor package is shown in Figure 21. The measurement results from one of the three scenarios is shown in Figure 22 and Figure 23."