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Hyperspectral fiber-optic field
radiometer with up to four independent channels for measuring radiance and
plane and scalar irradiance. Completely self-contained with programmable
controller, data logger, and internal rechargeable batteries. Submersible
up to 200 meters and includes depth sensor.
CARACTERISTICAS
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Up
to four independent channels (CCD spectrometers) for measuring up to four
light-field quantities (irradiance or radiance) nearly simultaneously.
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Several
spectrometer configurations offer wavelength ranges from 300nm-1000nm and
pixel resolution from 0.30.
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Sophisticated
controller is easily programmed for autonomous data collection (e.g., moorings)
or communicates with external computer.
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Built-in
auto exposure and dark correction plus radiometrically calibrated output.
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Up
to 512 MB of nonvolatile flash memory for internal logging.
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Rugged
and versatile fiber-optic cables and light collectors provide enormous
flexibility.
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Submersible
to 200 meters and includes accurate depth sensor.
APLICACIONES
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Ocean-color
remote sensing - Measure above and in-water remote-sensing reflectance.
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Primary
productivity - Measure spectral scalar irradiance in situ.
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Ocean-optical
research - Measure profiles of any light-field quantity.
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Environmental
monitoring - autonomous or integrated with a mooring
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Benthic
optical properties - Can be diver operated for measuring the bottom
reflectance and the transmission of light through benthic canopies.
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Any
application requiring the measurement of absolute (calibrated) radiometric
field quantities with high spectral resolution.
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El HydroRad
es un avance revolucionario en el campo de los radiómetros. Competitively priced, the HydroRad includes
up to four CCD spectrometers in an acetal plastic pressure housing. The
housing and fiber-optic cables are pressure rated to 200 meters and the
HydroRad includes an accurate depth sensor. The spectrometers receive light
from a specially designed fiber-optic cabling and connector system that is
extremely rugged and radiometrically stable. Three types of light
collectors can be used to measure plane irradiance, scalar irradiance, and
radiance. The complete HydroRad system is calibrated in absolute
radiometric units for both in-air and in-water measurements.
The
standard spectrometer option measures the range from 350 to 850 nm with 0.30
to 0.35 nm pixel resolution, while the high-resolution composite-grating
spectrometer option measures the range from 250 to 1100 nm with 0.40 to
0.45 nm pixel resolution. Both options collect data from all
spectrometer channels simultaneously
The
HydroRad-E1, shown at left, and -E2 include one embedded planar irradiance
collector. HydroRad-E2's also include a collector on a fiber optic
cable, which extends from the bottom of the unit.
The
HydroRad is completely self-contained and can be operated manually,
autonomously, or via an externally connected computer for real-time data
collection and display. A sophisticated embedded controller powered by
internal rechargeable batteries (or powered externally if desired) performs
all of the functions for operating and collecting data from the
spectrometers. The controller is programmed to seek optimal integration
times depending on light levels, automatically correct for dark current,
and radiometrically calibrate the output data. It has many other sophisticated
programming functions for autonomous operation.
Multiple
HydroRads (with optional daisy-chain ports) can be daisy-chained together
to form a virtual instrument of up to 12 channels.
The
fiber-optic design available with this field radiometer offers many
advantages over traditional field radiometers. The relatively small
light-collectors, for example, can be located away from the HydroRad
housing to minimize self-shading and to provide the ability to measure
light in a variety of configurations. For remote-sensing applications, we
offer two innovative accessories, a fiber-optically tethered buoy for
measuring both above surface and below surface irradiance and radiance, and
an extendable wand designed specifically for holding the fiber-optic
collectors for measuring above water downwelling irradiance and upwelling
radiance.
Standard
embedded collectors are Planar Irradiance.
However, Radiance collectors may be
substituted. Standard Fiber Optic Cable length is 3 meters - lengths up to
100 meters are available. Customer should specify collector type for
each fiber optic cable.
Para
ver ejemplos de configuraciones HydroRad diseñada
para varias aplicaciones, consultar aquí: · Solicitar
información sobre los productos
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