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icerad (00)
The portable radiation package (PRP) is an instrument suite to collect atmospheric radiation measurements on a moving platform. The instrument suite consists of a precision spectral pyranometer (PSP), precision infrared radiometer (PIR), and continuously rotating shadowband radiometer.
CO2 Profiling System for CO2 Storage (a1-level)
The Southern Great Plains (SGP) carbon dioxide flux (CO2FLUX) measurement systems provide half-hour average fluxes of CO2, H2O (latent heat), sensible heat, and momentum. The systems use the eddy covariance technique, which computes the fluxes from the vertical wind speed in combination with the concentrations of CO2 and H2O, temperature, and horizontal wind speed, respectively. A 3D sonic anemometer obtains the wind components and the temperature, while an infrared gas analyzer measures CO2 and H2O. A sub-system also measures half-hour averages of radiation, meteorological, and soil measurements.
mfrsr (00)
The visible multifilter rotating shadowband radiometer (MFRSR) is a passive instrument that measures global and diffuse components of solar irradiance at six narrowband channels and one open, or broadband, channel. Direct irradiance is not a primary measurement, but is calculated using diffuse and global measurements. To collect one data record, the MFRSR takes measurements at four different shadowband positions. The first measurement is taken with the shadowband in the nadir (home) position. The next three measurements are, in order, the first side-band, sun-blocked, and second side-band. The side-band measurements are used to correct for the portion of the sky obscured by the shadowband. The nominal wavelengths of the narrowband channels are 415, 500, 615, 673, 870, and 940 nm. From such measurements, the atmosphere’s aerosol optical depth at each wavelength can be inferred. In turn, these optical depths may be used to derive information about the column abundances of ozone and water vapor, as well as aerosol and other atmospheric constituents.
Radiometer for ACE-ENA
The broadband SPN total, zenith1, and zenith2 downwelling SW irradiances were corrected for tilt up to 10 degrees of tilt (per Long et al., 2010). For tilt greater than 10 degrees these values are set to ""bad"". No tilt correction has been applied to the MFR spectral data.
Solar Infrared Radiation Station (SIRS), Sky Radiation (SKYRAD), Ground Radiation (GNDRAD), and Broadband Radiometer Station (BRS) Instrument Handbook
The solar infrared radiation station (SIRS), ground radiometers on stand for upwelling radiation (GNDRAD), and sky radiometers on stand for downwelling radiation (SKYRAD) provide continuous measurements of broadband shortwave (solar) and longwave (atmospheric or infrared) irradiances for downwelling and upwelling components. The following six irradiance measurements are collected from a network of stations to help determine the total radiative flux exchange at each of the primary U.S. Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) field research sites—(Southern Great Plains [SGP], North Slope of Alaska [NSA)]and Eastern North Atlantic [ENA])—as well as the ARM mobile facilities (AMF): Direct normal shortwave (solar beam), Diffuse horizontal shortwave (sky), Global horizontal shortwave (total hemispheric), Upwelling shortwave (reflected), Downwelling longwave (atmospheric infrared), Upwelling longwave (surface infrared).