Fuselage Analyzer System
The AOS® CO2 Airborne Analyzer System is a portable, fully automated, artifact-free, in-situ air sampler for the measurement of atmospheric carbon dioxide. It takes multiple forms, depending on the platform and scientific objectives. The forms are rack mount, fuselage, wing pod and modular. There are both manned and unmanned aircraft. AOS has a team of individuals that have taken the system from invention to full deployment in successful support of scientific missions. References are available upon request.
Follows is the documentation for the unmanned aircraft (UAV) equipped with the fuselage form of the analyzer system.
Summary Specifications for the Fuselage Analyzer System
Attribute |
Value |
| Form |
Fuselage (Carbon Fiber Cylinder) |
| Precision |
≤ 100 ppbv at 1Hz |
| Broadband Precision |
≤ 0.11 ppmv at 10 Hz |
| Accuracy |
≤ 0.2 ppmv |
| Pneumatic Bandwidth |
≤ 50Hz |
| Electro-Optical Modulation |
100 Hz |
| Dimensions |
0.2 m O.D. x 0.7m Length |
| Weight |
6 kg |
| Electrical power |
< 30 Watts |
Specifications: Detail
Precision/Accuracy Specifications:
- Precision of 100 ppbv rms at 1 Hz with option of less than 50 ppbv.
- Pneumatic Bandwidth up to 50 Hz with 200 sccm giving 1 Hz.
- System calibration good to approximately 0.2 ppmv referenced to the WMO scale for CO2 DMF.
- Calibration (responsivity) verified before and after each flight by insertion of reference gases into the full system.
- Hermetically sealed fuselage to protect analyzer from ditching at sea and crashes on land.
Data Logging: CO2 DMF at frequencies up to 50 Hz that is synched with a full set of diagnostics and environmental parameters. Data are downloaded to user’s computer by wireless communication or by external cabling. (The system remains closed and sealed except for regularly scheduled maintenance.)
Additional Data Logging, Environmental Parameters:
- 3-D Location (Latitude/Longitude/Altitude) and Universal Time by GPS.
- Ambient Pressure (mBar).
Additional Data Logging, System Diagnostics: Flows, temperatures, pressures, and humidity of sample.
Data Reduction Capabilities: Reduction software is available that enables the user to present the observations in an informative context that includes a full set of diagnostics and historical analysis of the calibrations. This software is the result of the deployment of over 200 airborne missions from five manned and two unmanned platforms and for a great range of environmental conditions.
- Graphical editors are used to rate the observations and to organize them into vertical profiles, transects and time series.
- Format of reduced data stream is dictated by user.
- Dynamical, three dimensional plots are available for the fight pattern and CO2 DMF.
- Prompt reduction to calibrated CO2 DMF that can be finished within 1 hour after completion of a mission.
- Reduction takes the form of a Flight Log that is customized for the user. This log ends with a summary evaluation of each mission and makes recommendations for future observations.
Operational Specifications of Payload:
- Control by RC or auto-pilot.
- Electrical power needs are less than 30 W by rechargeable battery.
- Capable of running for more than 2 hours of continuous operation on battery power.
- Operates in 0 to 100% relative humidity, non-condensing.
- Service ceiling to 3 km.
Protocols, methodologies and technologies for calibration/validation:
- Calibration referred to the WMO scale of CO2 DMF by proven manipulation of reference gases.
- Validation to absolute DMF by new AOS flask technology to the accuracy of approximately 0.2 ppmv
- Broadband validation by deployment of pairs of analyzers on the same platform.
- Established protocols for on-site calibration and diagnostics of the full system including the platform itself.
- AOS provides all the technologies (flask, verifier analyzer) required to calibrate the CO2 DMF for both absolute level and bandwidth.
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