A Casa C-212 Aviocar plane with loop antenna.
I spotted a strange plane completely encircled by some kind of loop antenna flying low (below 3000 ft) in the skies over Nepean this afternoon.
Doing a bit of research on the Internets, I discovered that this plane is a Spanish-built CASA C-212 Aviocar, and the loop antenna is used for electromagnetic geophysical surveying. Here is an example of such a survey conducted by the United States Geological Survey, of the Upper San Pedro River Drainage system near Fort Huachuca, Southeastern Arizona in 1997, and here is a collection of papers on Airborne Geophysical Surveys.
A Casa C-212 Aviocar plane with loop antenna.
I spotted a strange plane completely encircled by some kind of loop antenna flying low (below 3000 ft) in the skies over Nepean this afternoon.
Doing a bit of research on the Internets, I discovered that this plane is a Spanish-built CASA C-212 Aviocar, and the loop antenna is used for electromagnetic geophysical surveying. Here is an example of such a survey conducted by the United States Geological Survey, of the Upper San Pedro River Drainage system near Fort Huachuca, Southeastern Arizona in 1997, and here is a collection of papers on Airborne Geophysical Surveys.