VARI was originally designed for satellite imagery. It is a vegetation index the uses only light waves from the visible light section of the spectrum (Red, Green, Blue). It puts a quantitative value on vegetative fraction estimation (VARI = (Green – Red) / (Green + Red – Blue). The index is only affected by atmospheric
An IMU sensor is a digital device that measures and records an Unmanned Aerial Vehicles’s acceleration, angular rate, and orientation in order to maneuver it. The IMU uses a conflation of accelerometers, gyroscopes, and magnetometers to achieve the measuring process. Recent developments in this area has allowed for IMU-enabled GPS (Global Positioning System) devices as
In DJI Mavic 3M, the M stands for multispectral. This Mavic 3 version couples a RGB camera and a multispectral camera that lets you survey and analyze your field and crops to determine how healthy your crop is as well as any environmental stress that might be present. The Mavic 3M’s multispectral camera has 4
NDVI (Normalized Difference Vegetation Index) is a graphical display that represents the results from images that were captured with a multispectral sensor during a remote unmanned vehicle survey mission and analyzed for the presence of live green plant life. Thus, NDVI information will bear out a measure for crop health. Learn More (Last Edit: 18
NTRIP (Network Transport of RTCM via Internet Protocol) is a communication protocol that allows synchronization between an UAV and a base station so corrections for location positioning can occur in real-time during a survey flight. The protocol streams DGPS (Differential Global Positioning) to enhance the available GNSS (Global Navigational Satellite Systems) which dramatically increases the
A Geographic Information System(GIS) is a computer application that is setup to gather, store, and examine data that corresponds to specific location position on the earth’s surface. It can also display this information for the user in the form of maps so that one can view, analyze, and recognize relational patterns that will help them
This is a process where the GPS data and the images that were obtained during an aerial flight from a drone mission are processed alongside data at the ground base station after the flight is completed instead of during the flight (or real-time). It is used to correct the location data in the images. Learn
RTK (real-time kinematic) positioning is a function that can be applied during an aerial survey to correct for errors in location positions of GPS or GNSS, or satellite navigation systems. The information being gathered by the unmanned drone is sent to a ground base station where real-time corrections are applied. Wikipedia RTK
Near infrared (NIR) radiation has a wavelength longer than the human eyes can detect, and it is located nearest to the section of the spectrum where the human eye can detect. The NIR region starts around the 700 µm – 800 µm. The human eye is a lot less sensitive to light wavelengths above 700
Longwave infrared (LWIR) is usually demarcated to fall between 8.0 – 14.0 µm wavelengths in the electromagnetic spectrum. It is a frequently utilized infrared technology for many drone applications, such as: Farm and crop analysis and solar field scans. The LWIR wavelengths can detect temperatures that radiate off the plants and the crop field. Thus