Temperature Effects; Technical Support - ASD FieldSpec 3 User Manual

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B.8

Temperature Effects

B.9

Technical Support

ASD Document 600540 Rev. J
To reduce the effects of low-frequency noise conditions like those found
outdoors we recommend taking multiple spectra with spectrum averaging set
to 10-25, then further average those spectra in post-processing using the
ViewSpec program. ViewSpec also permits viewing large groups of files.
The FieldSpec spectroradiometer instruments have thermo-electrically cooled
SWIR detectors (to -25 C), significantly reducing noise in those areas.
If the FieldSpec spectroradiometer is exposed to direct sunlight, depending on
the intensity of the sunlight, the effective operating period may be shortened.
When the system fails due to extreme temperature, it will fail gradually but
the data won't make perfect sense. Shut down and let the instrument cool
before operating again.
You may also see the FieldSpec spectroradiometer saturate in the SWIR 2
region if the instrument is still coming to equilibrium from a cooler
environment to a warmer environment. Frequent re-optimizations will address
this problem until the instrument comes to equilibrium.
The ASD applications provide a warning when the SWIR detectors are out of
thermal regulation.
If you have any questions or concerns, please contact ASD Inc. by phone, fax,
or email:
Phone: 303-444-6522 X-144
Fax: 303-444-6825
email: support@asdi.com
Web: www.asdi.com
ftp: ftp.asdi.com
Technical support is committed to providing you with a timely response to
your questions. We will work with you to provide solutions to your
applications. Technical support is available to answer your questions Monday
thru Friday, 8 am to 5 pm Mountain Standard Time. We will happily respond
to your e-mail queries as well.
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Appendix B Reference Information
FieldSpec® 3 User Manual