Cost-Effective Hyperspectral Transmissometers for Oceanographic Applications: Performance Analysis

Area of Science:

• Oceanography
• Optical Oceanography
• Instrumentation

Background:

• Advancements in micro-spectrometers and light emitting diodes (LEDs) have enabled the development of compact, affordable hyperspectral transmissometers.
• These new instruments expand research capabilities in oceanographic applications, particularly for in-situ measurements.

Purpose of the Study:

• To evaluate the performance of the commercial LED-based hyperspectral transmissometer VIPER for determining beam attenuation coefficients in coastal waters.
• To analyze experimental uncertainties including instrument stability, ambient light effects, and temperature/salinity corrections.

Main Methods:

• Experimental evaluation of the VIPER transmissometer under coastal conditions.
• Analysis of instrument stability, ambient light contamination, and temperature effects.
• Validation of VIPER performance through simultaneous field measurements with other transmissometers.

Main Results:

• The VIPER transmissometer exhibits issues with LED thermal management and ambient light contamination.
• Field validation confirmed VIPER's potential as a cost-effective alternative for beam attenuation measurements.
• Specific optimizations are necessary for reliable data acquisition in coastal environments.

Conclusions:

• The VIPER LED-based hyperspectral transmissometer is a compact and cost-effective option for coastal beam attenuation measurements.
• Careful consideration of thermal management and ambient light is crucial for accurate performance.
• Further optimizations are recommended to enhance the reliability of this new technology in oceanographic research.