Instrument : Normal Incidence Multifilter Radiometer (NIMFR)

Instrument Categories
Aerosols, Radiometric

Picture of the Normal Incidence Multi-Filter Radiometer (NIMFR)
Picture of the Normal Incidence Multi-Filter Radiometer (NIMFR)

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.

  • mfrsraod1mich : MFRSR: derived total & aerosol optical depth from 1st Michalsky algorithm
  • nimfraod1mich : NIMFR: derived total & aerosol optical depth from 1st Michalsky algorithm
  • sasheniraod : Shortwave Array Spectroradiometer-Hemispheric, NIR Aerosol Optical Depths
  • sashevisaod : Shortwave Array Spectroradiometer-Hemispheric, VIS Aerosol Optical Depths

Output Datastreams

  • nimfr : Normal Incidence Multi-Filter Radiometer (NIMFR): direct normal irradiances

Primary Measurements

The following measurements are those considered scientifically relevant.

Locations

North Slope Alaska
NSAC1Browse DataCentral Facility, Barrow AK
NSAC2Browse DataCentral Facility, Atqasuk AK
Southern Great Plains
SGPC1Browse DataCentral Facility, Lamont, OK

Contact(s)

Gary Hodges
(303) 497-6460
Gary.Hodges@noaa.gov