Thermal
Remote
Sensing
is
described
as
the
acquisition
of
image
data
in
the
infrared
part
of
the
electromagnetic
spectrum.
It
uses
the
radiations
that
are
emitted
by
the
surface itself.
Thermal
infrared
is
emitted
energy
that
is
sensed
digitally.
Thermal
remote
sensing
is
used
on
areas
to
assess
the
heat
island,
to
perform
land
cover
classifications
and
as
an
input
for
models
of
urban
surface
atmosphere
exchange.
Thermal
Remote
Sensing
is
a
special
case
of
reserving
land
surface
temperature
which
varies
in
accordance
to
the
surface
energy
balance.
Thermal data are usually acquired in sequences, where the first image is taken at night and the second is taken during the day. The image that is taken at night is used to monitor the raw emission of the surface and the second image that is taken during the day is used to see what part of incident shortware solar radiation is transformed to thermal radiation and then emitted to the surface.
This
principle
is
used
quite
often
in
geological
applications
and
we
can
study
the
presence
of
different
rocks
based
on
their
thermal
capacity.
Whereas
the
domain
of
visible
and
near
infrared
(VNIR)
radiation
is
suitable
for
monitoring
the
presence
of
metallic
minerals
such
as
hematite,
the
shortwave
infrared
domain
(SWIR)
is
used
for
the
detection
of
minerals
containing
OH-
functional
group.
But
none
of
these
domains
is
suitable
for
observing
the
major
constituents
of
igneous
rocks,
silica
and
feldspar.
In
addition
to
the
geological
applications,
Thermal
Remote
Sensing
image
data
can
be
used
for
:
- Studying the transformation of shortware solar radiation into longware thermal radiation and and evapo transpiration in the case of vegetation.
- Detection of heat loss in buildings
- Detection of the damages of steam pipelines and caliduct
- Detection of the subsurface fires
More Knowledge Contact
:- Spatial
IT Solutions
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