Glossary of Solar Radiation Resource Terms

Other relevant glossaries


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Nadir - straight down (toward the center of the Earth).


NCDC - the United States National Climatic Data Center.


NIP - a Normal Incident Pyrheliometer, used to determine the amount of solar irradiance emitted from the direction of the sun. Below is a picture of two NIPs (silver) mounted on a sun-following tracker (white) at the Solar Radiation Research Laboratory. These thermopile-based radiometers have a uniform spectral response from 280 nm to 2800 nm and a 5.7° field of view.

   


NOAA - the United States National Oceanic and Atmospheric Administration.


Non-renewable Energy Source - there is no formal definition for this term. Typical usage defines it as any energy source that is used faster than it is replenished. Standard examples are petroleum products, natural gas, coal, and fissionable materials; the replenishment rates of these energy sources are immensely slow, making it likely that they will become depleted at some time.


Normal Radiation - radiation striking a surface that is facing the sun. Mathematically, the word normal is the vector (direction) that is perpendicular to a surface, and the direction of a normal radiation source is perpendicular to a radiation source. Global (total) normal solar irradiance is all radiation that strikes a flat surface that faces the sun, while direct normal solar irradiance excludes all radiation that does not come from the direction of the sun in the sky.


NREL - the National Renewable Energy Laboratory, a U. S. National Laboratory specializing in developing technologies and procedures for using renewable energy sources.


NSRDB - the 1961-1990 National Solar Radiation Data Base, which supplies hourly solar and meteorological data from 239 locations in the United States and its territories.


The following links allow you to move to the words beginning with that letter.

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