Preliminary Results of the Solar Flux Radiometer Experiment Aboard the Pioneer Venus Multiprobe Mission
| Autor: | N. D. Castillo, Martin G. Tomasko, William L. Wolfe, Peter H. Smith, Alan W. Holmes, James M. Palmer, Lyn R. Doose |
|---|---|
| Rok vydání: | 1979 |
| Předmět: |
Physics
Multidisciplinary Radiometer Meteorology biology business.industry Cloud cover Venus biology.organism_classification Solar energy Atmospheric sciences Atmosphere of Venus Atmosphere Altitude Physics::Space Physics Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics business Zenith |
| Zdroj: | Science. 203:795-797 |
| ISSN: | 1095-9203 0036-8075 |
| DOI: | 10.1126/science.203.4382.795 |
| Popis: | The solar flux radiometer aboard the Pioneer Venus large probe operated successfully during its descent through the atmosphere of Venus. Upward, downward, and net fluxes from 0.4 to 1.0 micrometers were obtained at more than 390 levels between 185 millibars (at an altitude of approximately 61 kilometers) and the surface. Fluxes from 0.4 to 1.8 micrometers were also obtained between 185 millibars and about the level at which the pressure was 2 atmospheres. Data from 80 to 185 millibars should be available after additional decoding by the Deep Space Network. Upward and downward intensities in a narrower band from 0.59 to 0.66 micrometers were also obtained throughout the descent in order to constrain cloud properties. The measurements indicate three cloud regions above the 1.3-atmosphere level (at an altitude of approximately 49 kilometers) and a clear atmosphere beneath that level. At the 67 degrees solar zenith of the probe entry site, some 15 watts per square meter are absorbed at the surface by a dark ground, which implies that about 2 percent of the solar energy incident on the planet is absorbed at the ground. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|