Establishing the Moon as a Spectral Radiance Standard
| Autor: | Robert L. Wildey, Hugh H. Kieffer |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Atmospheric Science
Scintillation business.industry Astrophysics::Instrumentation and Methods for Astrophysics Ocean Engineering Photometer Physics::Geophysics law.invention Stars Apparent magnitude SeaWiFS Optics law Observatory Physics::Space Physics Radiance Astrophysics::Solar and Stellar Astrophysics Radiometry Astrophysics::Earth and Planetary Astrophysics business Geology Remote sensing |
| Zdroj: | Journal of Atmospheric and Oceanic Technology. 13:360-375 |
| ISSN: | 1520-0426 0739-0572 |
| DOI: | 10.1175/1520-0426(1996)013<0360:etmaas>2.0.co;2 |
| Popis: | A new automated observatory dedicated to the radiometry of the moon has been constructed to provide new radiance information for calibration of earth-orbiting imaging instruments, particularly Earth Observing System instruments. Instrumentation includes an imaging photometer with 4.5-in. resolution on a fully digital mount and a full-aperture radiance calibration source. Interference filters within 0.35–0.95 µm correspond to standard stellar magnitude systems, accommodate wavelengths of lunar spectral contrast, and approximate some band-passes of planned earth-orbiting instruments (ASTER, Landsat-7 ETM, MISR, MODIS, and SeaWIFS). The same equipment is used for lunar and stellar observations, with the use of an aperture stop in lunar imaging to comply with Nyquist's theorem and lengthen exposure times to avoid scintillation effects. A typical robotic night run involves observation of about 60 photometric standard stars and the moon; about 10 of the standard stars are observed repeatedly to determi... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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