Showing papers by "Greg Kopp published in 1999"
01 Jan 1999
TL;DR: The Terrestrial Planet Finder as mentioned in this paper is a space-based, cryogenic (35 K) interferometer for direct detection of Earth-type planets around nearby stars, which uses phase chopping to distinguish planet light from the symmetric background.
Abstract: We describe the features of the optical system for the Terrestrial Planet Finder, a space-based, cryogenic (35 K) interferometer for direct detection of Earth-type planets around nearby stars. Interferometric nulling suppresses stellar glare by a factor of several thousand or more, and phase chopping distinguishes planet light from the symmetric background. The mid-infrared (7-20 /spl mu/m) is favorable for detecting planetary emission relative to that from the star, and this spectral region also offers important molecular signatures indicative of key atmospheric gases.
2 citations
05 Oct 1999
TL;DR: In this article, the authors describe the features of the optical system for Terrestrial Planet Finder, a space-based, cryogenic interferometer for direct detection of Earth-type planets around nearby stars.
Abstract: We describe the features of the optical system for Terrestrial Planet Finder, a space-based, cryogenic interferometer for direct detection of Earth-type planets around nearby stars. Destructive interference in a stellar interferometer suppresses stellar glare by a factor of several thousand or more, and phase chopping distinguishes planet light from symmetric backgrounds. The mid-IR is favorable for detecting planetary emission relative to that from the star, and this spectral region also offers important molecular signatures indicative of key atmospheric gases.
1 citations