|
The CATS instruments have been in continuous
operation at the NOAA baseline observatories since 1999. While the CATS
instruments measure the same compounds as their predecessor, the Radiatively
Important Trace Species (RITS) instruments; the new gas chromatographs
(GCs) also measure several additional trace gases including carbonyl
sulfide (COS), halon-1211 (CBrClF2), HCFC-22 (CHClF2), methyl chloride
(CH3Cl), and methyl bromide (CH3Br). The CATS GCs are custom built instruments
with four separate channels. Each channel is comprised of a pair of separation
columns, flow controllers, an air selection valve, and an electron capture
detector. More information on the CMDL/HATS in situ programs and chromatography
techniques can be found at this link.
|
Engineering
Data