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.


 retired = Originating instrument has been retired at this location
Southern Great Plains
SGPC1 Browse Data Browse PlotsCentral Facility, Lamont, OK retired
ARM Mobile Facility
FKBM1 Browse Data Browse PlotsBlack Forest, Germany retired
GRWM1 Browse Data Browse PlotsGraciosa Island, Azores, Portugal retired
HFEM1 Browse Data Browse PlotsShouxian, Anhui, China retired
MAOM1 Browse Data Browse PlotsManacapuru, Amazonas, Brazil; AMF1
PGHM1 Browse Data Browse PlotsARIES Observatory, Nainital, Uttarkhand, India retired
PVCM1 Browse Data Browse PlotsHighland Center, Cape Cod MA; AMF 1 retired
PYEM1 Browse Data Browse PlotsPoint Reyes, CA retired


Gary Hodges
(303) 497-6460