The Application of the TDI Method to Observations of Lunar Occultations

Details The Application of the TDI Method to Observations of Lunar Occultations The Application of the TDI Method to Observations of Lunar Occultations

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997phdt........25s&link_type=abstract

Thesis (PHD). VANDERBILT UNIVERSITY , Source DAI-B 58/11, p. 6015, May 1998, 135 pages.

Computer Science

1

Time Delay Integration

Scientific paper

In my dissertation, I discuss how the time delay integration (TDI) method can be applied to observations of lunar occultations. The TDI method allows us to track the diffraction pattern of an occulted star by stepping the photon-generated charge packages in a CCD array placed in the pupil plane of a large telescope. The use of TDI should considerably improve the signal-to-noise ratio that can be reached in occultation observations compared with that which can be obtained currently using conventional high-speed photometers. This novel method could extend lunar occultation studies to faint stars and telescopes with large apertures without the aperture distortion effect inherent in the conventional method. The high signal-to-noise ratio allows us to obtain stellar angular diameters with accuracy better than 2% for mv<5 and φ >1 mas as well as more accurate photometry in close double systems.

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