Instrument : Multifilter Rotating Shadowband Radiometer (MFRSR)

Instrument Categories
Aerosols, Radiometric

Picture of the Multi-Filter Rotating Shadowband Radiometer (MFRSR)
Picture of the Multi-Filter Rotating Shadowband Radiometer (MFRSR)

General Overview

The multifilter rotating shadowband radiometer (MFRSR) takes spectral measurements of direct normal, diffuse horizontal and total horizontal solar irradiances. These measurements are at nominal wavelengths of 415, 500, 615, 673, 870, and 940 nm. The measurements are made at a user-specified time interval, usually about one minute or less. The sampling rate for the Atmospheric Radiation Measurement (ARM) Climate Research Facility MFRSRs is 20 seconds. From such measurements, one may infer the atmosphere's optical depth at the wavelengths mentioned above. In turn, these optical depths may be used to derive information about the column abundances of ozone and water vapor (Michalsky et al. 1995), as well as aerosol (Michalsky et al. 1994) and other atmospheric constituents.

A silicon detector is also part of the MFRSR. This detector provides a measure of the broadband direct normal, diffuse horizontal and total horizontal solar irradiances. A MFRSR head that is mounted to look vertically downward can measure upwelling spectral irradiances. In the ARM system, this instrument is called a "multifilter radiometer (MFR)". At the Southern Great Plains (SGP) there are two MFRs; one mounted at the 10-m height and the other at 25 m. At the North Slope of Alaska (NSA) sites, the MFRs are mounted at 10 m. MFRSR heads are also used to measure "normal incidence" radiation by mounting on a solar tracking device. These are referred to as normal incidence multi-filter radiometers (NIMFRs) and are located at the SGP and NSA sites. Another specialized use for the MFRSR is the narrow field of view (NFOV) instrument located at SGP. The NFOV is a ground-based radiometer (MFRSR head) that looks straight up.

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
  • mfrsrcldod1min : Derived: Cloud Optical Properties from MFRSR, MWR, Langley Analysis
  • nimfraod1mich : NIMFR: derived total & aerosol optical depth from 1st Michalsky algorithm
  • qcrad1long : Surface Radiation Measurement Quality Control testing, including climatologically configurable limits
  • qcradbeflux1long : Surface Radiation Measurement (BEFLUX input) QC testing, incl. climatologically configurable limits
  • qcradbrs1long : Surface Radiation Measurement (BRS input) QC testing, incl. climatologically configurable limits
  • sasheniraod : Shortwave Array Spectroradiometer-Hemispheric, NIR Aerosol Optical Depths
  • sashevisaod : Shortwave Array Spectroradiometer-Hemispheric, VIS Aerosol Optical Depths

Output Datastreams

  • mfrsr : Multi-Filter Rotating Shadowband Radiometer (MFRSR): 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
SGPE1Browse DataLarned, KS
SGPE2Browse DataHillsboro, KS (Extended)
SGPE3Browse DataLeRoy, KS
SGPE4Browse DataPlevna, KS
SGPE5Browse DataHalstead, KS
SGPE6Browse DataTowanda, KS
SGPE7Browse DataElk Falls, KS
SGPE8Browse DataColdwater, KS
SGPE9Browse DataAshton, KS
SGPE10Browse DataTyro, KS
SGPE11Browse DataByron, OK
SGPE12Browse DataPawhuska, OK
SGPE13Browse DataLamont, OK (Extended)
SGPE15Browse DataRingwood, OK
SGPE16Browse DataVici, OK (Extended)
SGPE18Browse DataMorris, OK (Extended)
SGPE19Browse DataEl Reno, OK
SGPE20Browse DataMeeker, OK (Extended)
SGPE22Browse DataCordell, OK
SGPE24Browse DataCyril, OK
SGPE25Browse DataSeminole, OK
SGPE27Browse DataEarlsboro, OK
SGPE31Browse DataAnthony, KS
SGPE32Browse DataMedford, OK
SGPE33Browse DataNewkirk, OK
SGPE34Browse DataMaple City, KS
SGPE35Browse DataTryon, OK
SGPE36Browse DataMarshall, OK
SGPE37Browse DataWaukomis, OK
SGPE38Browse DataOmega, OK
Tropical Western Pacific
TWPC1Browse DataCentral Facility, Manus I., PNG
TWPC2Browse DataCentral Facility, Nauru Island
TWPC3Browse DataCentral Facility, Darwin, Australia
ARM Mobile Facility
FKBM1Browse DataBlack Forest, Germany
GANM1Browse DataGan Airport, Gan Island, Maldives
GRWM1Browse DataGraciosa Island, Azores, Portugal
HFEM1Browse DataShouxian, Anhui, China
HFES1Browse DataTai Hu (lake), Zhejiang/Jiangsu, China; Supplemental
MAOM1Browse DataManacapuru, Amazonas, Brazil; AMF1
NIMM1Browse DataNiamey, Niger
NIMS1Browse DataNiamey, Niger-Ancillary
OLIM1Browse DataOliktok Point, Alaska
PGHM1Browse DataARIES Observatory, Nainital, Uttarkhand, India
PVCM1Browse DataHighland Center, Cape Cod MA; AMF 1
PYEM1Browse DataPoint Reyes, CA
SBSM1Browse DataSteamboat Springs CO, Valley Site
SBSS1Browse DataSteamboat Springs CO, Thunderhead Lodge
TMPM1Browse DataU. of Helsinki Research Station (SMEAR II), Hyytiala, Finland; AMF2

Contact(s)

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