The visible nulling coronagraph - architecture definition and technology development (2009)
Shao, Michael, Levine, B. Martin, Wallace, J. Kent, Liu, Duncan T., Schmidtlin, Edouard, Serabyn, Eugene, ...
NASA/JPL
High contrast imaging with the JWST NIRCAM coronagraph. (2009)
Green, Joseph J., Beichman, Charles, Basinger, Scott A., Horner, Scott, Meyer, Michael, Redding, David C., ...
Relative to ground-based telescopes, the James Webb Space Telescope (JWST) will have a substantial sensitivity advantage in the 2.2-5pm wavelength range where brown dwarfs and hot Jupiters are...
Sidick, Erkin, Morgan, Rhonda M., Green, Joseph J., Ohara, Catherine M., Redding, David C.
We have developed a new, adaptive cross-correlation (ACC) algorithm to estimate with high accuracy the shift as large as several pixels in two extended-scene images captured by a Shack-Hartmann...
The terrestrial planet finder coronagraph optical surface requirements (2009)
Shaklan, Stuart B., Green, Joseph J., Palacios, David M.
We derive the requirements on the surface height uniformity and reflectivity uniformity of the Terrestrial Planet Finder Coronagraph telescope and instrument optics for spatial frequencies within and...
Wavefront sensing and control software for a (2008)
Scott A. Basinger, David C. Redding, Fang Shi, David Cohen, Joseph J. Green, Catherine M. Ohara, ...
segmented space telescope
An adaptive cross-correlation algorithm for extended-scene Shack-Hartmann wavefront sensing (2007)
Sidick, Erkin, Green, Joseph J., Ohara, Catherine M., Redding, David C.
NASA/JPL
Coronagraph Workshop papers (2007)
Traub, Wesley A., Abe, Lyu, Angel, Roger, Arenberg, Jon, Balasubramanian, Bala, Baudoz, Pierre, ...
This volume contains the written contributions corresponding to the oral presentations of about 45 authors at the Coronagraph Workshop 2006.
The sensitivity of shaped pupil coronagraphs to optical aberrations (2006)
Green, Joseph J., Shaklan, Stuart B., Vanderbei, Robert J., Kasdin, N. Jeremy
Unlike focal-plane coronagraphs that use occuliting spots and Lyot stops to eliminate diffraction, pupil-plane coronagraphs operate by shaping the pupil to redirect the diffracted stellar light into...
Target selection and imaging requirements for JWST fine phasing (2006)
Green, Joseph J., Dean, Bruce H., Ohara, Catherine M., Zhang, Yan
To achieve and maintain the fine alignment of its segmented primary mirror the James Webb Space Telescope (JWST) plans to use focus-diverse wavefront sensing (WFS) techniques with science camera...
High contrast imaging testbed for the Terrestrial Planet Finder Coronagraph (2006)
Lowmman, Andrew E., Trauger, John T., Gordon, Brian, Green, Joseph J., Moody, Dwight, Niessner, Albert F., ...
The Terrestrial Planet Finder (TPF) mission is planning to launch a visible coronagraphic space telescope in 2014. To achieve TPF science goals, the coronagraph must have extreme levels of wavefront...
High contrast imaging testbed for the Terrestrial Planet Finder Coronagraph (2006)
Lowman, Andrew E., Trauger, John T., Gordon, Brian, Green, Joseph J., Niessner, Albert F., Moody, Dwight, ...
. . .viability. This paper describes the current testbed design and preliminary experimental results.
Low-order aberration sensitivity of eighth-order coronagraph masks (2006)
Shaklan, Stuart B., Green, Joseph J.
In a recent paper, Kuchner, Crepp, and Ge describe new image-plane coronagraph mask designs that reject to eighth order the leakage of starlight caused by image motion at the mask, resulting in a...
Chananb, Gary, Crossfielda, Ian, Dumonta, Philip, Green, Joseph J., Macintosh, Bruce
High-contrast imaging, particularly direct detection of extrasolar planets, is a major science driver for the next generation of extremely large telescopes such as the segmented Thirty Meter...
Science camera calibration for extreme adaptive optics (2006)
Wallace, J. Kent, Green, Joseph J., Shao, Michael, Troy, Mitchell, Lloyd, James, MacIntosh, Bruce
The nascent field of planet detection has yielded a host of extra-solar planet detections. To date, these detections have been the result of indirect techniques: the planet is inferred by precisely...
Wittenborn, John L., Green, Joseph J.
In late July, the U.S. Environmental Protection Agency ("EPA" or "the Agency") submitted proposed effluent limitation guidelines ("ELGs") for the metal products and machinery ("MP&M") industrial...
Metal Products and Machinery Effluent Limitation Guidelines Phase 1: Analysis of Current Data (2006)
Scott, Collier S., Chee, Michael T., Wittenborn, John L., Green, Joseph J.
We have completed our analysis of the data that the U.S. Environmental Protection Agency ("EPA" or "the Agency") is using to develop effluent limitation guidelines ("ELGs") for the shipbuilding...
Green, Joseph J., Shaklan, Stuart B.
The presence of optical aberrations in the entrance pupil of a coronagraph causes the stellar light to scatter about the occulting spot, reducing the effective contrast achievable. Even if these...
Green, Joseph J., Basinger, Scott A., Cohen, David, Niessner, Albert F., Redding, David C., Shaklan, Stuart B., ...
The Terrestrial Platet Finder high contrast imaging testbed facilitates the investigation into the diversity of engineering challenges presented by the goal of direct exo-planet detection, for...
The Terrestrial Planet Finder coronagraph dynamics error budget (2005)
Shaklan, Stuart B., Marchen, Luis, Green, Joseph J., Lay, Oliver P.
The Terrestrial Planet Finder Coronagraph (TPF-C) demands extreme wave front control and stability to achieve its goal of detecting earth-like planets around nearby stars. We describe the performance...
Coronagraph mask tolerances for exo-Earth detection (2005)
Lay, Oliver P., Green, Joseph J., Hoppe, Daniel J., Shaklan, Stuart B.
We present the results of analysis of random errors and simulate the effects of systematic errors using specific mask designs.
Testbed for extended-scene Shack-Hartmann and phase retrieval wavefront sensing (2005)
Morgan, Rhonda M., Ohara, Catherine M., Green, Joseph J., Roberts, Jennifer, Sidick, Erkin, Shcheglov, Kirill
We have implemented a testbed to demonstrate wavefront sensing and control on an extended scene using Shack-Hartmann and MGS phase retrieval simultaneously. This dual approach allows for both high...