10 µm Heterodyne Spectroscopy at Telescopes with 1 m Aperture
| Autor: | H. U. Kaufl, S. Drapatz, U. Schrey, H. Rothermel |
|---|---|
| Rok vydání: | 1986 |
| Předmět: |
Heterodyne
Physics biology business.industry Aperture Superheterodyne receiver Astrophysics::Instrumentation and Methods for Astrophysics Field of view Venus Mars Exploration Program biology.organism_classification law.invention Optics law Physics::Space Physics Astrophysics::Earth and Planetary Astrophysics Spectral resolution business Spectroscopy |
| Zdroj: | Instrumentation and Research Programmes for Small Telescopes ISBN: 9789027723253 |
| DOI: | 10.1007/978-94-010-9433-7_84 |
| Popis: | Heterodyne spectroscopy combines high instrumental transmission with virtually unlimited spectral resolution. For 250K bodies like Mars and Venus resolution is limited to 107 (=30 m/s) because of photon statistics whereas for solar measurements the cm/s velocity range, desirable for study of solar oscillations, is feasible. Since a single heterodyne receiver is conserving its etendu, smaller collecting area results in larger field of view. The signal remains unchanged as long as the source is large enough to fill the beam. For Mars, Venus and the Sun heterodyne observation with 1m aperture is competitive. |
| Databáze: | OpenAIRE |
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