What Are The Units Of Radiance; Can I Post-Process My Data - ASD FieldSpec 3 User Manual

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Figure B-1
Near Field (less than 1 meter):
Far Field (greater than 1 meter):
B.1.7

What are the units of radiance?

B.1.8

Can I post-process my data?

ASD.Document 600540 Rev. C
Field of View
D == effective diameter of foreoptic lens
A == foreoptic's angular field-of-view
X == distance to viewed surface
Y == diameter of field-of-view
Y = D + 2 * X * Tan(A/2)
Y = 2 * X * Tan(A/2)
Radiance is measured in Watts per square meter (W/m
However, the FieldSpec spectroradiometer measures spectral radiance, which
is the amount of radiance per unit wavelength. Spectral radiance is measured
in Watts per square meter per nanometer (W/m
Yes. ViewSpec is one of many applications that can post-process your data.
ENVI is another imagine processing application. The spectral data can be
important into many different applications.
The complete specification of the ASD file format is available upon request.
77
Appendix B Reference Information
2
).
2
/nm).
FieldSpec® 3 User Manual