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Radiometer for accurate (+ or - 1%) measurement of solar irradiance equal to 10,000 solar constants
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Kendall, J. M. ,. Sr |
| Copyright Year | 1981 |
| Description | The 10,000 solar constant radiometer was developed for the accurate (+ or - 1%) measurement of the irradiance produced in the image formed by a parabolic reflector or by a multiple mirror solar installation. This radiometer is water cooled, weighs about 1 kg, and is 5 cm (2 in.) in diameter by 10 cm (4 in.) long. A sting is provided for mounting the radiometer in the solar installation capable of measuring irradiances as high as 20,000 solar constants, the instrument is self calibrating. Its accuracy depends on the accurate determination of the cavity aperture, and absorptivity of the cavity, and accurate electrical measurements. The spectral response is flat over the entire spectrum from far UV to far IR. The radiometer responds to a measurement within 99.7% of the final value within 8 s. During a measurement of the 10,000 solar constant irradiance, the temperature rise of the water is about 20 C. The radiometer has perfect cosine response up to 60 deg off the radiometer axis. |
| File Size | 5084506 |
| Page Count | 26 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19810021876 |
| Archival Resource Key | ark:/13960/t1vf1nn5g |
| Language | English |
| Publisher Date | 1981-07-01 |
| Access Restriction | Open |
| Subject Keyword | Radiometers Fluid Mechanics Calibrating Irradiance Radiant Heating Water Temperature Parabolic Reflectors Graphs Charts Heat Flux Heat Transfer Solar Flux Density Circuit Diagrams Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
