About soc camera Set Up inside B2 Tropical Forest



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About SOC Camera Set Up inside B2 Tropical Forest

(Jin Wu, 2011 Dec.)

1 Main Goals of this winter:


  1. Test if the camera observation system works or not

  2. Coded in Matlab or IDL or C to automatically processes the camera image

  3. Test how Light Intensity and integrating time together affect camera sensed image quality

  4. Test what is the best way to calculate the reflectance information of camera image

2 Notice about Experimental Set-Up

  1. Where to set up camera?

The location of camera should be very close to tower, by which we can use tower based PAR sensor for calibration in future

  1. 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.



  1. The requirements for camera set-up

Make it strong and stable—at least it will not fluctuate along with the wind

  1. Where to set up the reference plate

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.

3 Time schedule for the winter test

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

12/26/2011-01/02/2011: remotely control the camera with a fixed but changed exposure time in a diurnal base

4 Time schedule for camera calibration

01/02/2012: Neil, gets the fedex number from eeb department, and then mail it to SOC company for calibration.

5 Time schedule for drought experiment

~01/11/2012: Neil or Joost can pick up the camera from U of A EEB department

~01/12/2012: Neil and Robert can set up the camera in the new cable and rotating system; Steve could test the rotating system then; Jin can set the new parameters for the camera remotely

~01/13/2012-03/15/2012: our camera will be placed in the B2 for drought experiment

6 Time schedule for control experiments

~03/16/2012-03/23/2012: control experiment or delay



7 Time schedule for Amazon application

~05/15/2012-06/15/2012: Camera is installed in Amazon


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