Measuring Optical Properties in Case 2 Waters: Some AOP and IOP Considerations David R. Dana, Chief Engineer Robert A. Maffione, Chief Scientist HOBI Labs, Inc.
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Measuring Optical Properties in Case 2 Waters: Some AOP and IOP Considerations
David R. Dana, Chief EngineerRobert A. Maffione, Chief Scientist
HOBI Labs, Inc.
1. Hyperspectral and IOP Measurements
Why IOPs?
Water Constituents
IOPs
AOPs
Satellite Observations
Sun,Weather
Atmosphere,Sensor, platform
Why Hyperspectral Measurements?
Why Hyperspectral Measurements?
Hyperspectral: What’s Different?
• Optical designs and detector characteristics vary• Fiber optic light collectors• Integration time and dynamic range• Data density
2. Bubbles
Calculated VSF of Bubbles
HydroBeta
Bubbles in the Lab
HydroBeta with Bubbles
Bubble VSF Time Series
Bubble VSF Calculated and Measured
HydroProfiler with HydroBeta (etc)
WALRUS in Bubbles
Bubble Experiment Results
• HydroBeta detected characteristic bubble signature, but bubbles dissipated very rapidly.
• WALRUS observations of radiometric parameters also showed substantial, but short-lived, bubble effects.
• Bubble effects persist only if continually replenished by wind or waves.
3. Near-shore Internal Waves
Monterey Bay
Boris BORISBio-Optical
Remotely-operated Instrumented Submersible
Thin Layer in Monterey Bay
Downcast Upcast
The layer shifts - rapidly!
Internal Wave Revealed
Density
Beam attenuation
Optical Effects of a Near-Shore Internal Wave
590 nm
Modeled Lw for a Modulated 2-Layer System
Layer at 10 m
Layer at 5 m
532 nm
The End
Why Hyperspectral Measurements?
Related Documents
