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The successful completion of this IRAD will deliver a fully functional instrument at TRL 6. The key characteristics that we will demonstrate are simplicity, low cost, small size, and sufficient sensitivity to measure formaldehyde in the troposphere. Our goal is to reduce the size and cost by a factor of three compared to our existing In Situ Airborne Formaldehyde (ISAF) instrument while sacrificing a factor of ten in sensitivity. To maximize the value of this IRAD, we plan on testing the instrument on an aircraft. Our target flight opportunity will be the Atlas jet operated at NASA Ames. The Ames AJAX project (Atlas Jet Atmospheric eXperiment) is designed to validate OCO-2 with weekly flights. The same flights can be used for validating OMI on Aura and TEMPO (the recently selected Venture-1) by including measurements of formaldehyde, ozone, and CO.
As a consequence, formaldehyde is a primary measurement objective in two proposed missions of the Decadal Survey (GEO-CAPE and GACM) and the first funded Venture-Instrument (TEMPO). These missions will require NASA airborne in situ measurements of formaldehyde from the ground to the lower stratosphere to determine measurement and science requirements, develop retrieval algorithms and for validation. For example, both the Venture suborbital DISCOVER-AQ and the HQ-directed SEAC4RS campaigns target formaldehyde as a primary objective to validate and extend the measurements made by the OMI instrument on Aura.
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