Yes, exactly. Hyperspectral sensors are still quite far away from being an economically valid solution for farmers and even crop consultants; the sensors are just simply too expensive at the moment. Currently, the best way in detecting specific stress is perhaps having knowledge in the times that certain stressors or diseases typically appear- and to try to detect them in respect of chlorophyll or nitrogen flux at certain windows of the crop's development- is what I am thinking: this is sort of a work around solution. The question is, how early can these be detected with just reflectance data alone. If its not detectable before or at the time a farmer may typically apply blanket treatment of, say a fungicide, then its impractical.
I am using micasense - (first number is center wavelength, second number is bandwidth):
475 - 20
560- 20
670-10
720-10
840-40
spatial resolution ~5cm/pixel @60 metres. Im mounting this on a UAV and capturing a mosaik of the field crops.
I'll check out Huete's work- thanks. If you'd like, you can private message me on this forum to talk more in depth. These bands are fairly narrow- my main concern is the narrow red edge channel. Anyways, thanks for your help!
Alex