Micromet Systems Radiation and Soil Sensors
Q*7
HFT
Introduction
Q*7 net radiometers are used to determine the total net radiation (sum of
visible and infrared; difference between incoming and outgoing) near the
Earth's surface. They have two calibration coefficients -- one for positive
values (generally daytime, dominated by visible radiation) and another,
smaller, value for negative values (nighttime, infrared). ISFF also routinely
measures all 4 of these radiation components at up to 4 locations individually
with pyranometers and pyrgeometers, but usually still uses net radiometers for
redundancy.
ISFF also uses the Micromet Systems heat flux plates (HFT) and soil temperature
sensors to determine the heat flux into, and heat storage by, the top layer
of soil.
These sensors are used to determine components of the total surface energy
balance.
Links