Calibration
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Optical Calibration Services 
The R&D of solar radiation instrumentation has significant
calibration requirements. The specialized optical laboratory YES
operates to characterize products includes three major facilities
for the measurement of spectral, cosine and absolute responses of
optical radiation detectors. Our optical laboratory facilities
give us the capability to fully characterize the performance of
radiometric instrumentation referenced to NIST standards. As
standard policy, we also execute any outstanding Engineering
Change Orders on instruments returned for calibration, effectively
offering a free technology upgrade to our customers. Customers
have the option of having a benchmark pre-calibration for data
taken prior to modifications. |
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Portable Field Calibrator
The Model PFC-5001 Portable Field Calibrator is a highly stable
irradiance light source for performing absolute characterization
of field-calibrating narrow band spectroradiometers in-situ. While
it is optimized for use with the Model RSS-1024 and Model
UVRSS-1024 spectroradiometers, it can be readily setup and adapted
to a wide variety of optical detectors both in the laboratory and
in the field. The PFC-5001 is a computer-controlled stabilized
single lamp light source. An internal stabilized current
regulation circuit ensures precise current regulation to the
rugged 200 watt tungsten filament lamp, providing constant optical
power output under all environmental temperatures. Two internal
independent fans maintain the internal air that surrounds the lamp
envelope at a nearly constant temperature. Current monitoring
resistive shunt temperatures as well as housing temperatures can
be monitored during operation. An exit aperture provides precise
positioning of the spatially uniform light flux to the device
under test (DUT). Custom mechanical alignment fixtures are
typically built to order to mate the system to a variety of
radiometers. |
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Satellite Quality Monitor
The Model SQM-5002 Satellite Quality Monitor is a
computer-controlled, diffuse light source for field-calibrating
narrow band filter radiometers and CCD imagers in-situ. A
commercialization of the SeaWIFS Quality Monitor initially
developed by NASA's Goddard Space Flight Center and NIST, the
SQM-5002 supports field stability checks of ground-level filter
radiometers to assist with verifying the performance of remote
sensing platforms. While the lamp housing and components are
nearly identical to the original NASA design, the control system
and power supply were re-designed to enhance performance and are
enclosed in a waterproof NEMA-4X enclosure. The SQM-5002 is a
complete system and provides three optical output intensity
levels. It can be readily adapted to a wide variety of optical detectors in the laboratory or the field. |
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Interactive
Model