In Situ Microradiometers: Smaller, Faster, and Scalable to Hyperspectral

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNG05CA40C
Agency Tracking Number: 042331
Amount: $70,000.00
Phase: Phase I
Program: SBIR
Awards Year: 2005
Solicitation Year: 2004
Solicitation Topic Code: E1.03
Solicitation Number: N/A
Small Business Information
5340 Riley Street, San Diego, CA, 92110-2621
DUNS: 091488635
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Charles Booth
 Principal Investigator
 (619) 686-1888
 booth@biospherical.com
Business Contact
 John Morrow
Title: Business Official
Phone: (619) 686-1888
Email: morrow@biospherical.com
Research Institution
N/A
Abstract
Radiometers are a crucial element in NASA's studies of Planet Earth. This proposal addresses the basic need for a miniature spectrometer, flexibly configurable and optimized for above and in-water optical property measurements. The innovation we are proposing develops a 1 cm diameter photodetector module, called a "microradiometer." The microradiometer will consist of a photodetector, preamplifier with controllable gain, high resolution analog to digital converter (ADC), microprocessor, and an addressable digital port, all on one small, thin circuit assembly. We anticipate that the design will result in significant improvements in dynamic range, sampling speed, reliability, and reduced power consumption over existing instruments. In one embodiment, a single microradiometer forms the basis of a very small (much less than 2.5 cm diameter) single-channel submersible light sensor. In another application, clusters of microradiometers can be matched with front-end optics (collector/window/filter stack) to form small, fast, less expensive multiwavelength radiometers for a variety of measurements ? even hyperspectral applications. The envisioned microradiometer-based systems can be packaged into small underwater housings suitable for deployment on drifters, moorings, towed vehicles, and vertical profilers. Networks of these multiwavelength radiometers, configured to measure irradiance or radiance, can be operated synchronously by a central data acquisition computer.

* Information listed above is at the time of submission. *

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