Abstract

We have analyzed the gas filter radiometer approach for long-term monitoring of stratospheric HCl, HF, CH₄, and H₂O using solar occultation at selected intervals in the 2–6 μm range. Our analysis shows that this instrument technique is feasible. This conclusion is based on a simulation study in which we evaluated the effect of various experiment errors on retrieval accuracy. The instrument errors used were based on measurements made on a breadboard model gas filter radiometer. The results show that HCl and HF can be measured with an rms error of 10% and CH₄ and H₂O with an error of 15% over the 10–30-km range.

© 1977 Optical Society of America

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