Biospherical OCULLAR Prototype featured in NASA's Cutting Edge

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OCULLAR sunset

The prototype Ocean Color Underwater Low Light Advanced Radiometer (OCULLAR) resulted from a collaboration between Biospherical Instruments and NASA/GSFC scientist Dr. Stanford Hooker. OCULLAR is designed to measure light in natural waters under low-light conditions across multiple wavelength regions, from the ultraviolet to the near-infrared, with 14 decades of dynamic range. The instrument pairs a miniature photomultiplier tube (PMT) with a Biospherical microradiometer coupled to a silicon photodetector. A microprocessor embedded in the microradiometer activates the PMT when low-light conditions are detected, and is powered off under higher light conditions where the silicon detector microradiometers take over. The first field campaign using the prototype successfully collected data under moonlit skies, including using a BioSHADE (shadowband) accessory to measure direct and diffuse components of moonlight. In addition to OCULLAR systems supporting ocean color research, versions optimized for studying predation and other nocturnal behaviors are possible.

See the article online at http://gsfctechnology.gsfc.nasa.gov/OCULLAR.html.

 

Biospherical Instruments introduces the GUVis-3511

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GUVis-3511 radiometer configured with BioSHADE and BioGPS.GUVis-3511 radiometer configured with BioSHADE and BioGPS.Biospherical Instruments has just released the GUVis-3511, the latest member of BSI's line of atmospheric radiometers. The GUVis-3511 is based on BSI’s proprietary microradiometer technology and available with up to 19 channels, ranging from 305 to 1,640 nm.  The instrument can also be equipped with a shadowband accessory to determine the direct solar irradiance. Depending on configuration, the GUVis-3511 affords the measurement of the UV Index and the retrieval of aerosol optical depth, cloud optical thickness, and total column ozone. Click here for more information and here for a paper published in Atmospheric Measurement Techniques using the instrument for shipborne measurements of aerosol optical depth.

 

New Product Announcements

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  • C-PrOPS: Compact-Propulsion Option for Profiling Systems. C-PrOPS is an auxiliary technology that adds dual thruster-based dynamic positioning to the deployment package known as C-OPS. The Compact Thruster Remote Accessory (C-TRAC) is a wireless unit to control C-PrOPS.
  • Biospherical Instruments has just released the GUVis-3511, the latest member of BSI's line of atmospheric radiometers. The GUVis-3511 is based on BSI’s proprietary microradiometer technology and available with up to 19 channels, ranging from 305 to 1,640 nm.  The instrument can also be equipped with a shadowband accessory to determine the direct solar irradiance. Depending on configuration, the GUVis-3511 affords the measurement of the UV Index and the retrieval of aerosol optical depth, cloud optical thickness, and total column ozone. Click here for more information.
  • C-OPS: Compact Optical Profiling System. C-OPS instruments measure the vertical distribution of spectral radiance and irradiance in aquatic environments, as well as incident global irradiance above the water's surface.
  • New Profiler for AOPs: C-OPS. The High Resolution Multichannel Profiler is optimized for coastal remote sensing studies. C-OPS is a radiometer system for determining apparent optical properties in aquatic systems. Avoiding any influence from the shadow of the boat, the frame can be optimized for either slow descent rates for work in very shallow (e.g., 3 m) and coastal waters, or faster descent rates for observations in the open ocean.
  • AMOUR. The newly developed Advanced Multi-purpOse Usb Radiometer (AMOUR) is a high-speed USB Radiometer for research and engineering in the laboratory or field.
 

Measurements during the 2017 total solar eclipse

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Total solar eclipse of 21 August 2017 observed with GUVis-3511.Total solar eclipse of 21 August 2017 observed with GUVis-3511.

BSI performed measurements with a GUVis-3511 radiometer in Oregon during The Great American Eclipse of August 21, 2017. An in-depth article about the campaign is here.

 

AOP TM Ready for Download

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The NASA Technical Memorandum written by Biospherical and NASA titled, "Advances in Measuring the Apparent Optical Properties (AOPs) of Optically Complex Waters,” NASA TM-2010-215856, is now available for download. This TM documents the Biospherical systems that support both in-air and in-water AOP determinations and describes the development of the Microradiometer and C-OPS, as well as the SHALLO family of instruments. For your convenience, PDFs of individual chapters from this TM have been included on our Web pages that deal with their respective instruments.

 

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