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Laboratory evaluation and application of microwave absorption properties under simulated conditions for planetary atmospheres (Document No: 19900005709)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Steffes, Paul G. |
| Copyright Year | 1989 |
| Description | Radio absorptivity data for planetary atmospheres obtained from spacecraft radio occultation experiments and earth-based radio astronomical observations can be used to infer abundances of microwave absorbing atmospheric constituents in those atmospheres, as long as reliable information regarding the microwave absorbing properties of potential constituents is available. Work performed has shown that laboratory measurements of the millimeter-wave opacity of ammonia between 7.5 mm and 9.3 mm and also at the 3.2 mm wavelength require a different lineshape to be used in the theoretical prediction for millimeter-wave ammonia opacity than was previously used. The recognition of the need to make such laboratory measurements of simulated planetary atmospheres over a range of temperatures and pressures which correspond to the altitudes probed by both radio occultation experiments and radio astronomical observations, and over a range of frequencies which correspond to those used in both radio occultation experiments and radio astronomical observations, has led to the development of a facility at Georgia Tech which is capable of making such measurements. It has been the goal of this investigation to conduct such measurements and to apply the results to a wide range of planetary observations, both spacecraft and earth-based, in order to determine the identity and abundance profiles of constituents in those planetary atmospheres. |
| File Size | 1514755 |
| Page Count | 50 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19900005709 |
| Archival Resource Key | ark:/13960/t8x973t5j |
| Language | English |
| Publisher Date | 1989-10-01 |
| Access Restriction | Open |
| Subject Keyword | Lunar And Planetary Exploration Planetary Atmospheres Electromagnetic Absorption Atmospheric Models Pressure Distribution Absorptivity Temperature Profiles Environment Simulation Ammonia Radio Occultation Radio Astronomy Atmospheric Composition Millimeter Waves Opacity Microwaves 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 |
