Dynamic spectroscopic measurements of the temperature and pressure cycles in a MOPITT pressure modulator cell.
The temperature and pressure cycles inside a pressure modulator cell (PMC) of the type used for gas-correlation radiometry aboard the Measurements of Pollution in the Troposphere (MOPITT) satellite instrument have been determined from dynamic measurements of the spectral line shapes of the R(0) and R(18) transitions in the fundamental vibrational-rotational band of carbon monoxide. The line strengths and linewidths were used to calculate the temperature and pressure, respectively, with a temporal resolution of approximately 200 micros, or 1/100 of a PMC cycle. The results are compared with a thermodynamic box model.
Wehr
Richard
R
Department of Physics, University of Toronto, Toronto, Ontario M5S 1A7, Canada. rick@atmosp.physics.utoronto.ca
McKernan
Eamonn
E
Vitcu
Adrian
A
Ciurylo
Roman
R
Drummond
James R
JR