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Capabilities / Instruments

NIMFR

Normal Incidence Multifilter Radiometer

Baseline VAP, Baseline Instrument

The normal incidence multifilter radiometer (NIMFR) is a ground-based instrument that provides a time series of the shortwave spectral direct normal irradiance. Additionally, a broadband silicon detector 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.

Primary Measurements

Browse Data

Contact

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Gary Hodges
Lead Mentor NOAA Earth System Research Laboratory

Related Data Announcements

New Aerosol Optical Depth Data Available for SGP and NSA

References

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Hodges et al. Multifilter Rotating Shadowband Radiometer (MFRSR), Multifilter Radiometer (MFR), and Normal Incidence Multifilter Radiometer (NIMFR) Instrument Handbook. 2016. 10.2172/1251387.

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Atmospheric Radiation Measurement (ARM) | Reviewed March 2025