TITAN HD USER MANUAL
95
9-3-6 Humidity
Humidity remains in the atmosphere even on bright days. Water of all three
states can be found naturally in the atmosphere: liquid (rain, fog, and clouds),
solid (snowflakes, ice crystals), and gas (water vapor). Water in any state is
an obstacle to accurate temperature measurements. When the wave passes
through the water particles, a part of its energy is absorbed and a part is
scattered. Therefore the electromagnetic wave is attenuated.
Use the text and voice annotation features of the device to create notes.
9-3-5 Atmospheric Transmittance
Electromagnetic radiation flows through the atmosphere everyday. Most of this
energy is absorbed, but some of the radiation makes it though. This is called
transmission and refers to the absorption, scattering, and reflection ability of the
surrounding atmosphere. Visible light is one of the wavelengths that makes it
through generally unabsorbed.
Transmission can cause abnormal readings if not properly accounted.
See
Section 8-17-1-3 ROI Regional Environmental Parameters
and
Section
8-17-2 Global Environmental Parameters
to learn how to adjust the atmospheric
transmittance value of an ROI.
