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... > Instruments > Earth Remote Sensing Instruments > Passive Remote Sensing > Photon/Optical Detectors > Photometers > NOAA O3 Classic

Preferred term

NOAA O3 Classic  

Definition

  • The NOAA-O3 instrument consists of a mercury lamp, two sample chambers that can be periodically scrubbed of ozone, and two detectors that measure the 254-nm radiation transmitted through the chamber. The ozone absorption cross-section at this wavelength is accurately known; hence, the ozone number density can be easily calculated. Since the two absorption chambers are identical, virtually continuous measurements of ozone are made by alternating the ambient air sample and ozone scrubbed sample between the two chambers. At a one-second data collection rate, the minimum detectable concentration of ozone (one standard deviation) is 1.5 x 10 10 molecules/cm 3 (0.6ppbv at STP). (en)

Broader concept

Change note

  • 2022-04-18 12:35:01.0 [tstevens] Insert Concept add broader relation (NOAA O3 Classic [f21311d0-6788-472b-a315-b130932435c2,894377] - Photometers [f66daf4f-4d71-49a0-9d3d-205dc7f1faed,886965]);
  • 2022-04-18 12:36:25.0 [tstevens] insert AltLabel (id: null category: primary text: Dual-Beam UV-Absorption Ozone Photometer language code: en); insert Definition (id: null text: The NOAA-O3 instrument consists of a mercury lamp, two sample chambers that can be periodically scrubbed of ozone, and two detectors that measure the 254-nm radiation transmitted through the chamber. The ozone absorption cross-section at this wavelength is accurately known; hence, the ozone number density can be easily calculated. Since the two absorption chambers are identical, virtually continuous measurements of ozone are made by alternating the ambient air sample and ozone scrubbed sample between the two chambers. At a one-second data collection rate, the minimum detectable concentration of ozone (one standard deviation) is 1.5 x 10 10 molecules/cm 3 (0.6ppbv at STP). language code: en);

URI

https://gcmd.earthdata.nasa.gov/kms/concept/f21311d0-6788-472b-a315-b130932435c2

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