LABORATORY AND FIELD INVESTIGATIONS OF EPPLEY RADIATION SENSORS
More precise radiation measurements in the Antarctic are required for studies designed to assess the radiation and heat budgets of that area. These requirements inspired the present investigation which is aimed at the experimental determination of certain of the instrumental characteristics and thei...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.395.3023 2023-05-15T14:01:16+02:00 LABORATORY AND FIELD INVESTIGATIONS OF EPPLEY RADIATION SENSORS Edwin C. Flowers Norbert F. Helkrt Norbert F. Helfert The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.395.3023 http://docs.lib.noaa.gov/rescue/mwr/094/mwr-094-04-0259.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.395.3023 http://docs.lib.noaa.gov/rescue/mwr/094/mwr-094-04-0259.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://docs.lib.noaa.gov/rescue/mwr/094/mwr-094-04-0259.pdf text ftciteseerx 2016-01-08T02:26:44Z More precise radiation measurements in the Antarctic are required for studies designed to assess the radiation and heat budgets of that area. These requirements inspired the present investigation which is aimed at the experimental determination of certain of the instrumental characteristics and their consequences. Laboratory investigations of a group of Eppley pyranometers verifies previous findings that the temperature response is a unique characteristic of each instrument which can produce radiation-values 14 percent too high under the extreme Antarctic temperature conditions and differences between instruments at the same temperature of 3 to 8 percent. Tests made on the effect of inverting the pyranometer for the measurement of reflected solar radiation show that the instrument sensitivity decreases by 4 to 6 percent in this position. A test on one normal incidence pyrheliometer indicates virtually no temperature effect. Weather Bureau calibrations of several pyrheliometers give results in excellent agreement with the calibrations performed by Eppley Laboratory. Field shade calibrations and simultaneous exposure comparisons of a group of Eppley pyranometers at the South Pole indicate that the computation of the total solar radiation should probably be made using separate direct and diffuse calibration factors for the pyranometers. Text Antarc* Antarctic South pole South pole Unknown Antarctic South Pole The Antarctic |
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English |
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More precise radiation measurements in the Antarctic are required for studies designed to assess the radiation and heat budgets of that area. These requirements inspired the present investigation which is aimed at the experimental determination of certain of the instrumental characteristics and their consequences. Laboratory investigations of a group of Eppley pyranometers verifies previous findings that the temperature response is a unique characteristic of each instrument which can produce radiation-values 14 percent too high under the extreme Antarctic temperature conditions and differences between instruments at the same temperature of 3 to 8 percent. Tests made on the effect of inverting the pyranometer for the measurement of reflected solar radiation show that the instrument sensitivity decreases by 4 to 6 percent in this position. A test on one normal incidence pyrheliometer indicates virtually no temperature effect. Weather Bureau calibrations of several pyrheliometers give results in excellent agreement with the calibrations performed by Eppley Laboratory. Field shade calibrations and simultaneous exposure comparisons of a group of Eppley pyranometers at the South Pole indicate that the computation of the total solar radiation should probably be made using separate direct and diffuse calibration factors for the pyranometers. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Edwin C. Flowers Norbert F. Helkrt Norbert F. Helfert |
spellingShingle |
Edwin C. Flowers Norbert F. Helkrt Norbert F. Helfert LABORATORY AND FIELD INVESTIGATIONS OF EPPLEY RADIATION SENSORS |
author_facet |
Edwin C. Flowers Norbert F. Helkrt Norbert F. Helfert |
author_sort |
Edwin C. Flowers |
title |
LABORATORY AND FIELD INVESTIGATIONS OF EPPLEY RADIATION SENSORS |
title_short |
LABORATORY AND FIELD INVESTIGATIONS OF EPPLEY RADIATION SENSORS |
title_full |
LABORATORY AND FIELD INVESTIGATIONS OF EPPLEY RADIATION SENSORS |
title_fullStr |
LABORATORY AND FIELD INVESTIGATIONS OF EPPLEY RADIATION SENSORS |
title_full_unstemmed |
LABORATORY AND FIELD INVESTIGATIONS OF EPPLEY RADIATION SENSORS |
title_sort |
laboratory and field investigations of eppley radiation sensors |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.395.3023 http://docs.lib.noaa.gov/rescue/mwr/094/mwr-094-04-0259.pdf |
geographic |
Antarctic South Pole The Antarctic |
geographic_facet |
Antarctic South Pole The Antarctic |
genre |
Antarc* Antarctic South pole South pole |
genre_facet |
Antarc* Antarctic South pole South pole |
op_source |
http://docs.lib.noaa.gov/rescue/mwr/094/mwr-094-04-0259.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.395.3023 http://docs.lib.noaa.gov/rescue/mwr/094/mwr-094-04-0259.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766270857660858368 |