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Gillespie, A.

Publications and source records attributed to Gillespie, A..

9 records
All sourcesNASA NTRSDOE OSTI
NASA NTRS2005

Inverted Martian Craters in Lineated Glacial Valleys, Ismenius Lacus Region, Mars

We studied small, uniquely-shaped craters found on the surface of lineated terrain in the Ismenius Lacus region of Mars. By utilizing MOC and THEMIS satellite images, we located terrain including lineations (viscous flow features), smoothing of topography, and morphologic features such as polygons and gullies, which appear to be strong evidence of preexisting ice deposits.

McConnell, B. S.↗
NASA NTRS2003

Plans for living on a restless planet sets NASA's solid Earth agenda

What are the most important challenges facing solid Earth science today and over the next two decades? And what is the best approach for NASA, in partnership with other agencies, to address these challenges? A new report, living on a restless planet, provides a blueprint for answering these questions. The top priority for a new spacecraft mission in the area of solid earth science over the next 5 years, according to this report, is a satellite dedicated to interferometric synthetic aperture radar(inSAR).

Earth magnetic field imaging spectroscopy solid ea↗
NASA NTRS1999

ASTER Validation Plan

This document is the validation plan for the ASTER standard data products.

ASTER validator calibration algorithm↗
NASA NTRS1997

Field Thermal Infrared Imaging Experiments

Day/night radiant temperature differences acquired from thermal imaging techniques proved effective in separating four seral stage and one deciduous forest class.

temperature↗
NASA NTRS1985

Geologic Utility of LANSDAT-4 TM Data

The performance of the TM vis-a-vis various geological applications was quantified by analyzing: (1) the geological utility of the data with respect to the increased spatial resolution and number of bands (compared to the MSS); (2) the geometric accuracy; (3) the radiometric performance of the TM scanner. Preliminary analyses were performed on TM scenes: over Death Valley, California, and over southern Arizona. Both scenes were acquired in CCT-PT format, where the data were geometrically and radiometrically corrected. Overall, the TM data appears to contain a marked increase in geologically useful information; however, a number of instrumental or processing artifacts may well limit the ability of the geologist to fully extract this information.

Abrams, M.↗