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

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$70,000.00
Award Year:
2005
Program:
SBIR
Phase:
Phase I
Contract:
NNG05CA40C
Agency Tracking Number:
042331
Solicitation Year:
2004
Solicitation Topic Code:
E1.03
Solicitation Number:
n/a
Small Business Information
Biospherical Instruments Inc.
5340 Riley Street, San Diego, CA, 92110-2621
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
091488635
Principal Investigator:
Charles Booth
Principal Investigator
(619) 686-1888
booth@biospherical.com
Business Contact:
John Morrow
Business Official
(619) 686-1888
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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