Differential Optical Absorption Spectrometer (DOAS)


The DOAS has been deployed for field testing.  The transceiver has been modified to improve  the beam collimation and alignment. The calibration unit has  been  upgraded and is now leak-free.

The analyzer has been assembled and programmed to take measurements of criteria gas pollutants. Sulfur dioxide (SO2) measurements were  made from October 2012 to January 2013.