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Coronagraphic observations of lunar sodium
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Sprague, A. L. Hunten, D. M. |
| Copyright Year | 1997 |
| Description | The core of the proposed work was to observe the lunar sodium atmosphere with our classical Lyot coronagraph and specially-built grating spectrograph on Mount Lemmon, a 9400-foot peak about an hour's drive from Tucson. It is optimized for low scattered light and for observing from the Moon's limb to an altitude of approx. 1 lunar radius. The grating has 600 lines/mm and a blaze angle of 49 deg, and is used with a somewhat wide slit at a resolving power of about 5000. It is called DARRK for the initials of the people who designed it. The rejection of stray light from the Moon's disk is spectacularly good: when the sky is clear this light is absent right up to a few arcsec from the limb. We use an excellent 1024 by 1024 pixel CCD camera, operated at -100 C; the exposures are 10 to 30 min. Data reduction is done with ERAF running on a Sun Sparcstation. |
| File Size | 126608 |
| Page Count | 3 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19980201076 |
| Archival Resource Key | ark:/13960/t1ck3bd7c |
| Language | English |
| Publisher Date | 1997-09-10 |
| Access Restriction | Open |
| Subject Keyword | Astronomy Radii Moon Exposure Slits Sun Data Reduction Pixels Ccd Cameras Supports Sodium Lunar Atmosphere Coronagraphs Resolution 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 |
