Instrument : Narrow Field of View Zenith Radiometer (NFOV)

Instrument Categories
Cloud Properties, Radiometric

Picture of the Narrow Field of View Zenith Radiometer (NFOV)

General Overview

The Narrow Field of View Zenith Radiometer (NFOV) is a ground-based radiometer that looks straight up. As implied by the name, the field of view of the instrument is narrow, thus permitting the measurement of the downwelling zenith radiance. The output of the instrument consists of a time series of 1-sec observations of the zenith spectral radiance. The radiance is measured at a wavelength of 869 nm. Data from the instrument have many uses; for example, the internal structure of clouds may be characterized by examining a time series of the radiance data.

Output Datastreams

  • nfov : Narrow Field of View (NFOV)
  • nfov2ch : Narrow Field of View-2 channel (NFOV2CH)

Primary Measurements

The following measurements are those considered scientifically relevant.


Southern Great Plains
SGPC1Browse DataCentral Facility, Lamont, OK
ARM Mobile Facility
FKBM1Browse DataBlack Forest, Germany
GRWM1Browse DataGraciosa Island, Azores, Portugal
HFEM1Browse DataShouxian, Anhui, China
MAOM1Browse DataManacapuru, Amazonas, Brazil; AMF1
PGHM1Browse DataARIES Observatory, Nainital, Uttarkhand, India
PVCM1Browse DataHighland Center, Cape Cod MA; AMF 1
PYEM1Browse DataPoint Reyes, CA


Gary Hodges
(303) 497-6460