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Albedometers

Albedometers

LP PYRA 05 is constructed starting from two 1st class* pyranometers and the
LP PYRA 06 starting from two 2nd class* pyranometers (* according to ISO 9060
standards and to specifications published by the World Meteorological Organization).
An albedometer basically consists of two pyranometers, mounted back-toback,
one looking upward (sky) and one downward (earth). The upward pyrameter
measures the incident global radiation (direct radiation + diffuse radiation)
striking the ground, while the downward one, measures the global radiation
reflected from the ground. The outputs of the two pyranometers electric signals
(the two pyranometers which made up of the LP PYRA 05 are couppled in order
to have the same sensitivity) can be directly sent to a data logger or to an automatic
data processor. Albedo is the fraction of solar radiation that is reflected
from the ground, with respect to incident radiation:
ALBEDO =
Reflected Global Radiation
Incident Global Radiation
By using albedometers, we can calculate the net radiation obtained
through the difference between incident global radiation and reflected
global radiation.
Delta Ohm albedometers operate within 0.3 μm ÷3 μm spectral range. No power
supply is needed, as the two pyranometers generate a voltage which is usually
equal to:
10
mV
kW • m-2
Every pyranometer composing the albedometer is calibrated separately as per
the WRR (World Radiometric Reference) standard and is supplied with the relevant
Report of Calibration.
These are strong and reliable ground-based instruments, especially designed
to be used under all weather conditions. They are suitable for installation of the
field.
Recommended use: climatological research, weather stations, road weather
stations, agriculture stations, etc…

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