Instrument : Normal Incidence Multifilter Radiometer (NIMFR)
Instrument Categories
Aerosols, Radiometric, Derived Quantities and Models
General Overview
The Normal Incidence Multi-Filter Radiometer (NIMFR) is a ground-based instrument that provides a time series of the shortwave spectral direct normal irradiance. Additionally, there is a broadband silicon detector that can crudely measure the direct normal broadband irradiance. These irradiance measurements can be used to infer clear sky aerosol optical depth and columnar abundances of ozone and water vapor. The NIMFR is one of a class of instruments known as sun photometers.
Output Value-Added Products
This instrument is an input to the following value-added products, which provide improved measurements or derived quantities.
- nimfraod1mich : NIMFR: derived total & aerosol optical depth from 1st Michalsky algorithm
Output Datastreams
- nimfr : Normal Incidence Multi-Filter Radiometer (NIMFR): direct normal irradiances
Primary Measurements
The following measurements are those considered scientifically relevant.
- Shortwave narrowband diffuse downwelling irradiance
- Shortwave narrowband direct normal irradiance
- Shortwave narrowband total downwelling irradiance
- Optical depth
Locations
- North Slope Alaska (NSA)
- Central Facility, Atqasuk AK (C2)
- Central Facility, Barrow AK (C1)
- Southern Great Plains (SGP)
- Central Facility, Lamont, OK (C1)
- SHEBA (Surface HEat Budget of the Arctic) (SHB)
- Ice Station SHEBA (C1)
Contact(s)
Gary Hodges
(303) 497-6460
Gary.Hodges@noaa.gov
