The Harvard Halogens Instrument (HAL) is an in situ airborne fluorescence analyzer developed by Harvard University. It uses chemical titration-resonance fluorescence to detect chlorine monoxide (ClO) and thermal dissociation-chemical titration-resonance fluorescence to detect chlorine nitrate (ClONO2). HAL operates at the 118.9 nm wavelength and reports data every 35 seconds. It measures ClO and ClONO2 mixing ratios with a precision of 3 pptv and 10 pptv, respectively.
Instrument Details
- Meter/Analyzer
- Earth Science > Atmosphere > Atmospheric ChemistryEarth Science > Atmosphere > Atmospheric Chemistry > Halocarbons And HalogensEarth Science > Atmosphere > Atmospheric Chemistry > Halocarbons And Halogens > Chlorine MonoxideEarth Science > Atmosphere > Atmospheric Chemistry > Halocarbons And Halogens > Chlorine NitrateEarth Science > Atmosphere > Atmospheric Chemistry > Halocarbons And Halogens > Bromine Monoxide
- Troposphere
- 35 s
- Point
- 2521.4 THz
- Currently unavailble
David Wilmouth
David Wilmouth
Harvard University
Currently unavailable
Currently unavailable
Unpublished
 NASA Earth Resources-2 Aircraft 58 Campaigns · 107 Instruments |  Dynamics and Chemistry of the Summer Stratosphere 2021—2022 Central United States 3 Deployments · 5 Data Products
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 NASA WB-57 15 Campaigns · 76 Instruments |  Mid-latitude Airborne Cirrus Properties Experiment 2011 Central United States 1 Deployment · 7 Data Products
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