NDLI: COCAP: A carbon dioxide analyser for small unmanned aircraft systems

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COCAP: A carbon dioxide analyser for small unmanned aircraft systems

Content Provider	Scilit
Author	Kunz, Martin Lavric, Jost V. Gerbig, Christoph Tans, Pieter Neff, Don Hummelgård, Christine Martin, Hans Rödjegård, Henrik Wrenger, Burkhard Heimann, Martin
Copyright Year	2017
Description	Unmanned aerial systems (UAS) could provide a cost-effective way to close gaps in the observation of the carbon cycle, provided that small yet accurate analysers are available. We have developed a COmpact Carbon dioxide analyser for Airborne Platforms (COCAP). The accuracy of COCAP's carbon dioxide (CO2) measurements is ensured by calibration in an environmental chamber, regular calibration in the field and by chemical drying of sampled air. In addition, the package contains a lightweight thermal stabilisation system that reduces the influence of ambient temperature changes on the CO2 sensor by two orders of magnitude. During validation of COCAP's CO2 measurements in simulated and real flights we found a measurement error of 1.2 μmol mol−1 or better with no indication of bias. COCAP is a self-contained package that has proven well suited for the operation on board small UAS. Besides carbon dioxide dry air mole fraction it also measures air temperature, humidity and pressure. We describe the measurement system and our calibration strategy in detail to support others in tapping the potential of UAS for atmospheric trace gas measurements.
Ending Page	1849
Page Count	17
Starting Page	1833
DOI	10.5194/amt-2017-207
Issue Number	3
Volume Number	11
Language	English
Publisher	Copernicus GmbH
Publisher Date	2017-11-07
Access Restriction	Open
Subject Keyword	Unmanned Aircraft Systems Carbon Dioxide Analyser Contained Package
Content Type	Text
Resource Type	Article

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