The location of camera should be very close to tower, by which we can use tower based PAR sensor for calibration in future
From what angles to set up camera?
Oblique View: BRDF effect? But how to quantify it as there is no control comparison (nadir view)
Nadir View: still has the BRDF effect caused by the relative position between the central of camera and the object, as the camera image is very wide (of 40 degree)
We will decide to test it in Nadir view this time, though oblique view is very popular in Tapojos; next time when the rotating system is done by Steve Bissell, we can then design the rotating frequency there, by which we can use B2 biome to test the BRDF effect as well.
Reference Plates: four teflon reference plates, and one grey reference plate
Positioning: two comparable teflon reference plates will be positioned at different height; while other two comparable teflon reference plates will be placed at upper canopy height but different locations; the grey reference plate will be placed at the upper canopy height as well.
12/22/2011: Set-up the camera inside B2, and do some relative tests, including: remotely camera image acquisition and temperature data logged, remotely in between laptop communication, data transferred from laptop to the external hard drive, the position to set up the reference plates of different kinds, change the focus of the camera to adapt to large landscape, and to set it down the F-Stop
12/23/2011: AM-double check the camera image inside the lab, by testing the exposure time from early morning to mid-day; PM-to make sure if I need to go to Biosphere 2 to directly control the laptop, or do we have any problem in remote communicating, or any other problem happening to the usage of our camera
12/24/2011: Remotely control the camera with the change of exposure time from early morning to the late afternoon—test the combined effect of light intensity and exposure time on the camera images
12/25/2011: remotely control the camera by setting a constant exposure time in a diurnal base