Gas Camera

The Resonance GCSO2-1 is a UV-sensitive camera that compares images in two spectral bands to produce concentration maps of SO2 plumes.  This method is based on differential optical absorption spectroscopy (DOAS) methodology for remote sensing of atmospheric gases (Refs 1-12).  GCSO2-1 has been under development since 2008 and the GC-SO2-1 is an elegant implementation of the method that has several unique features.

The gas camera employs a single back-thinned CMOS camera, which simultaneously captures two images of the target plume in bands centered on 310 and 320 nm. Offsets due to changes between two imaging chips or moving filters are eliminated.  The two images are mirrored about the optical axis of the camera, which eliminates distortion and edge dimming.  A complete calibration is obtained by use of a PC-controlled SO2 gas cell wheel.  Modeling and measurements show that the concentration maps from GCSO2-1 are highly specific to SO2 and are insensitive to changes in the spectrum of daylight due to solar elevation.

  • Specifications
  • Features
  • Volcano Images
  • Stack Images
  • Quick Comparison



Housing Dimensions

284 x 182 x 188 mm

170 x 135 x 110 mm

Camera Mass (excluding batteries)

3.5 kg

700 g

Tripod/Laptop/Camera w/batteries mass

1.9 kg/2.5 kg/1.0 kg

1.9 kg/0.7 kg/1.0 kg


Ethernet and GPIO

Ethernet/USB 3.0

Single Pixel Width at Plume with Lens

(4 km distance)

1 meter

2 meters

Focal Length

24 mm

12 mm

Field of View (with CMOS camera)

12.5 x 16.0 degrees

15.0 x 22.0 degrees

Motorized Calibration Wheel

Hall-sensor Servo

Not Applicable

Light Sources, Spectrometers´╗┐, Monochromators, Detectors , Components and Systems from Extreme Ultraviolet (EUV) to Infrared (IR)

Resonance Ltd  | Telephone (705)733-3633

143 Ferndale Drive North, Barrie, Ontario L4N 9V9 Canada