autonomous airborne sun/sky-scanning spectrometer

Demonstrated (Existing)

POC

Technology/Application

Funding/Timeline

Planned (Future)

In Development (Mature)

NASA Ames Instrument Workshop April 13, 2005

Autonomous Airborne Sun/Sky-Scanning Spectrometer

• Beat Schmid BAER/SGG, bschmid@mail.arc.nasa.gov x4-5933• Team Members: Nicholas Truong, Roy Johnson, Phil Russell, Jens Redemann, John Livingston

• Ground-based prototype NASA DDF: Mar 04-06• Miniaturization design study NOAA: Mar 05-07• Funding opportunities: NASA, NOAA, DOE

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Measures: Continuous spectrum of solar direct-beam transmission and scattered light at wavelengths, = 300-1017 nm

Data products: Aerosol optical depth Columns of H2O, O3, NO2 Aerosol extinction Density of H2O, O3, NO2

When UAVflies vertical profiles

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Technology: Zeiss Monolithic Miniature Spectrometer, CCD 1044×64 pixels, fiber optics, quad detector, custom entrance optics, tracking motors, bearings, seals, flashdisks

Technology Readiness Level: Ground-based prototyping

Technical challenges:Tracking accuracy, autonomous sun finding, straylight supression, dynamic range, spectrometer temperature control window frost & dirt, pressure & weather seals.

Ames role:World leader in airborne sunphotometry.

Sun-tracking head

Optical fiberEntrance aperture