Zobrazeno 1 - 10
of 135
pro vyhledávání: '"Ch Wehrli"'
Publikováno v:
Theoretical and Applied Climatology
Lachat, D.; Wehrli, C. (2012). A century of apparent atmospheric transmission over Davos, Switzerland. Theoretical and Applied Climatology, 110(4), pp. 539-547. Springer 10.1007/s00704-012-0685-z
Lachat, D.; Wehrli, C. (2012). A century of apparent atmospheric transmission over Davos, Switzerland. Theoretical and Applied Climatology, 110(4), pp. 539-547. Springer 10.1007/s00704-012-0685-z
Pyrheliometer measurements have been carried out at the Physikalisches Meteorologisches ObservatoriumDavos from 1909 to present which results in the longest stationary direct irradiance record worldwide. A variety of different instruments and measure
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::997f41e585bb04c28b48f15977213a62
http://doc.rero.ch/record/317753/files/704_2012_Article_685.pdf
http://doc.rero.ch/record/317753/files/704_2012_Article_685.pdf
Autor:
Ch. Wehrli, D. Lachat
Publikováno v:
Journal of Geophysical Research: Atmospheres. 118:3285-3291
[1] Apparent atmospheric transmission has been calculated from the longest stationary pyrheliometer record worldwide located at the Physikalisch-Meteorologisches Observatorium Davos covering the years 1909 to 2010. Periods of early brightening up to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c4bbfe2c2a36a9c5870c9f4c126358d5
https://doi.org/10.1002/jgrd.50344
https://doi.org/10.1002/jgrd.50344
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 63:1479-1487
Solar spectral irradiance variations are known to exhibit a strong wavelength dependence with the amount of variability increasing towards shorter wavelengths. The bulk of solar radiation is emitted at visible and infrared wavelengths. Thus, the spec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5da37780ff5e9fd816e467aa06972731
https://doi.org/10.1016/s1364-6826(01)00020-7
https://doi.org/10.1016/s1364-6826(01)00020-7
Autor:
Ch Wehrli
Publikováno v:
Metrologia. 37:419-422
Atmospheric optical depths are determined by relating ground-based measurements of direct solar radiation to the extraterrestrial value, I0, that a filter radiometer would read outside the atmosphere. Usually I0 is determined by the Langley extrapola
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d686dc4fee500561caaf57cec3283bc
https://doi.org/10.1088/0026-1394/37/5/16
https://doi.org/10.1088/0026-1394/37/5/16
Publikováno v:
Metrologia. 32:653-656
Two sunphotometers with three channels at 862 nm, 500 nm and 335 nm were operated in space for eleven months on board the European Retrievable Carrier (EURECA). Both instruments experienced substantial losses of sensitivity, although the second instr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d2521b47baee4974ec5cce60f120ead2
https://doi.org/10.1088/0026-1394/32/6/51
https://doi.org/10.1088/0026-1394/32/6/51
Publikováno v:
Advances in Space Research. 16:29-32
During its 9 months of operation, the experiment SOVA-2 (Solar Constant and Variability) on board the European Retrievable Carrier (EURECA) has measured the total solar irradiance with two radiometers of the type PMO6-R. The solar variability has bee
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9e5e0908e45ac68e6b218b48ac570323
https://doi.org/10.1016/0273-1177(95)00263-e
https://doi.org/10.1016/0273-1177(95)00263-e
Publikováno v:
Advances in Space Research. 16:25-28
The solar irradiance has been measured at 3 wavelengths (335, 500 and 862nm) by the experiment SOVA2 from the European Retrievable Carrier (EURECA). The dataset, corrected for instrumental effects and degradation, is examined for solar variability on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::923b8aa8cd3ab98dc8a05efc4c114578
https://doi.org/10.1016/0273-1177(95)00262-d
https://doi.org/10.1016/0273-1177(95)00262-d
Publikováno v:
Advances in Space Research. 16:51-54
The operational environment of EURECA as experienced by the SOVA2 experiment is presented. This experiment has independently measured the solar pointing with a high resolution sun sensor and monitored several temperatures as ancillary parameters to b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9548c6b3ec32bb6f18642ea5f10fa1d8
https://doi.org/10.1016/0273-1177(95)00268-j
https://doi.org/10.1016/0273-1177(95)00268-j
Publikováno v:
Solar Physics. 152:23-29
The solar total irradiance has been measured during the EURECA (EUropean Retrievable CArrier) mission by the radiometers PM06 of the experiment SOVA 2 (SOlar VAriability, Experiment 2). The instruments are of the active cavity type with a sampling of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::571de0b3bb528829e6d870e8c150d4e4
https://doi.org/10.1007/bf01473178
https://doi.org/10.1007/bf01473178
Autor:
Alain Fichot, Benoît Penelle, Claus Fröhlich, V. Domingo, J. Romero, D. Crommelynck, Ch Wehrli
Publikováno v:
Metrologia. 30:375-379
The experiment SOVA (SOlar VAriability) on board EURECA (EUropean REtrievable CArrier) contains two types of radiometers sunphotometers for measuring the total and spectral irradiance at five wavelengths between 335 nm and 862 nm. Besides the direct
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::94427889750f3846ab26eea3fd8d1765
https://doi.org/10.1088/0026-1394/30/4/032
https://doi.org/10.1088/0026-1394/30/4/032