Terrestrial Planet Finder Coronagraph Instrument Design

Shaklan, Stuart; Balasubramanian, Kunjithapatham; Ceperly, D.; Green, J. J.; Hoppe, Daniel; Lay, Oliver P.; Lisman, P. Douglas; Mouroulis, Pantazis

doi:10.1017/s1743921306009987

Cited by 2 publications

(2 citation statements)

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“…The Terrestrial Planet Finder Coronagraph mission (TPF-C) is aimed to make the direct detection and the characterization (multi-spectral imaging at resolution up to 70) of nearby terrestrial extrasolar planets in the visible range. The telescope would have an elliptical aperture of (6 to 8) × 3.5 m 2 [Stapelfeldt et al 2005, Shaklan et al 2006]. An…”

Section: Resultsmentioning

confidence: 99%

The Earth as an extrasolar planet: the vegetation spectral signature today and during the last Quaternary climatic extrema

Arnold¹,

Bréon

Brewer

2009

International Journal of Astrobiology

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The so-called Vegetation Red-Edge (VRE), a sharp increase in the reflectance around 700 nm, is a characteristic of vegetation spectra, and can therefore be used as a biomarker if it can be detected in an unresolved extrasolar Earth-like planet integrated reflectance spectrum. Here we investigate the potential for detection of vegetation spectra during the last Quaternary climatic extrema, the Last Glacial Maximum (LGM) 1 and the Holocene optimum, for which past climatic simulations have been made. By testing the VRE detectability during these extrema when Earth's climate and biomes maps were different from today, we are able to test the vegetation detectability on a terrestrial planet different from our modern Earth. Data from the Biome3.5 model have been associated to visible GOME spectra for each biome and cloud cover to derive Earth's integrated spectra for given Earth phases and observer positions. The VRE is then measured. Results show that the vegetation remains detectable during the last climatic extrema. Compared to current Earth, the Holocene optimum with a greener Sahara slightly increases the mean VRE on one hand, while on the other hand, the large ice cap over the northern Hemisphere during the LGM decreases vegetation detectability. We finally discuss the detectability of the VRE in the context of recently proposed space missions.

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Section: Resultsmentioning

confidence: 99%

The Earth as an extrasolar planet: the vegetation spectral signature today and during the last Quaternary climatic extrema

Arnold¹,

Bréon

Brewer

2009

International Journal of Astrobiology

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“…Alternative concepts for starlight suppression for this mission are also being studied. A pupil remapping study (Guyon 2005), a visible nulling concept (Shao 2005), and a comparison of coronagraph forms (Shaklan 2005) are presented orally and in posters in this conference.…”

Section: Technology Research and Developmentmentioning

confidence: 99%

Terrestrial Planet Finder Coronagraph Observatory Summary

et al. 2005

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Creating an optical space telescope observatory capable of detecting and characterizing light from extra-solar terrestrial planets poses technical challenges related to extreme wavefront stability. The Terrestrial Planet Finder Coronagraph design team has been developing an observatory based on trade studies, modeling and analysis that has guided us towards design choices to enable this challenging mission. This paper will describe the current flight baseline design of the observatory and the trade studies that have been performed. The modeling and analysis of this design will be described including predicted performance and the tasks yet to be done.

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Terrestrial Planet Finder Coronagraph Instrument Design

Abstract: Abstract. We describe the baseline TPF-C instrument design as of October 2005.

Cited by 2 publications

References 11 publications

The Earth as an extrasolar planet: the vegetation spectral signature today and during the last Quaternary climatic extrema

The Earth as an extrasolar planet: the vegetation spectral signature today and during the last Quaternary climatic extrema

Terrestrial Planet Finder Coronagraph Observatory Summary

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