Gail S Anderson

US Patent:

7337065, Feb 26, 2008

Filed:

Jan 23, 2001

Appl. No.:

09/767539

Inventors:

Steven M. Adler-Golden - Newtonville MA, US
Michael Matthew - Westford MA, US
Alexander Berk - Sharon MA, US
Lawrence S. Bernstein - Lexington MA, US
Gail Anderson - Boulder CO, US

Assignee:

Spectral Sciences, Inc. - Burlington MA

International Classification:

G01W 1/00

US Classification:

702 3, 702 5

Abstract:

This invention discloses several improved methods of correcting for atmospheric effects on a remote image of the Earth's surface taken from above, wherein the image comprises a number of simultaneously acquired images of the same scene, each including a large number of pixels, each at a different wavelength band, and including infrared through ultraviolet wavelengths. One method is for retrieving the aerosol/haze amount (i. e. , visible range) from an assumed ratio of in-band reflectances, rather than from an assumed reflectance value. Another method is for identifying cloud-containing pixels. This is used to improve the calculation of the spatially averaged radiance L*and reflectance ρimages in standard equations. Another method greatly reduces the number of mathematical operations required to generate the reflectance values. This method operates by averaging the water vapor and ρvalues over small groups of neighboring pixels, so that the same A, B, S, L*parameter values may also be assigned to all pixels within the group.

US Patent:

7433806, Oct 7, 2008

Filed:

Apr 20, 2001

Appl. No.:

09/838801

Inventors:

Alexander Berk - Sharon MA, US
Prabhat K. Acharya - Burlington MA, US
Lawrence S. Bernstein - Lexington MA, US
Gail P. Anderson - Boulder CO, US
Paul Lewis - Falls Church VA, US
James H. Chetwynd - Stoneham MA, US
Michael L. Hoke - Leominster MA, US

Assignee:

Spectral Sciences, Inc. - Burlington MA

International Classification:

G06G 7/48
G06K 9/40
G01N 30/90
G01N 21/62
G01N 1/22

US Classification:

703 2, 382274, 73 2337, 436171, 436181

Abstract:

A radiative transport band model algorithm has been developed for prediction and analysis of high spectral resolution radiometric measurements. Atomic and molecular line center absorption is determined from finite spectral bin equivalent widths. A new mathematically exact expansion for finite bin equivalent widths provides high accuracy at any desired spectral resolution. The temperature and pressure dependent Voigt line tail spectral absorption contributing to each spectral bin is pre-computed and fit to Padé approximants for rapid and accurate accounting of neighboring-to-distant lines.

US Patent:

58842268, Mar 16, 1999

Filed:

Jun 3, 1997

Appl. No.:

8/867966

Inventors:

Gail P. Anderson - Concord MA
James H. Chetwynd - Stoneham MA
Lawrence S. Bernstein - Lexington MA
Alexander Berk - Sharon MA
Prabhat K. Acharya - Burlington MA
David C. Robertson - Bedford MA
Eric P. Shettle - Chevy Chase MD

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

G06F16900

US Classification:

702 3

Abstract:

Recent upgrades to the MOTRAN atmospheric radiation code improve the accuracy of its radiance predictions, especially in the presence of clouds and thick aerosols, and for multiple scattering in regions of strong molecular line absorption. MODTRAN3. 5 features a generalized specification of cloud properties, while research version MODTRAN4 implements a Correlated-k (CK) approach for more accurate calculation of multiply scattered radiance. Comparisons to cloud measurements demonstrate the viability of the CK approach. The impact of these upgrades on predictions for AVIRIS viewing scenarios is discussed for both clear and clouded skies; the CK approach provides refined predictions for AVIRIS nadir and near-nadir viewing.

US Patent:

50758560, Dec 24, 1991

Filed:

Jul 17, 1989

Appl. No.:

7/383372

Inventors:

Francis X. Kneizys - Burlington MA
Eric P. Shettle - Wellesley MA
Leonard W. Abreu - Chelmsford MA
James H. Chetwynd - Stoneham MA
Gail P. Anderson - Concord MA
William O. Gallery - Winchester MA
John E. A. Selby - Huntington NY
Shepard A. Clough - Lexington MA

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

G06F 1554
G01J 500

US Classification:

364420

Abstract:

LOWTRAN 7 is a low-resolution propagation model and computer code for predicting atmospheric transmittance and background radiance from 0 to 50,000 cm. sup. - at a resolution of 20 cm. sup. -. The code is based on the LOWTRAN 6 (1983) model with a number of improvements. Multiple scattered radiation has been added to the model as well as new molecular band model parameters and new ozone and molecular oxygen absorption parameters for the UV. Other modifications include a wind-dependent desert model, new cirrus cloud models, and new cloud and rain models. The code also includes new representative (geographical and seasonal) atmospheric models and updated aerosol models with options to replace them with user-derived values. An improved extra-terrestrial solar source function is also included. Six modes of program execution are allowed with the new model and computer code for a given slant path geometry.