Issue 10 Volume 41 May 16, 2003

used to validate the specified performance requirements outlined for this instrument.
Author
Design Analysis; Fourier Transformation; Spectrometers; Remote Sensing; Earth Orbital Environments
20030032346 DYNACS Engineering Co., Inc., Cocoa Beach, FL, USA
Air Monitoring for Hazardous Gas Detection
Arkin, C. Richard; Naylor, Guy; Haskell, William; Floyd, David; Curley, Charles; Griffin, Timothy P.; Adams, Frederick;
Follistein, Duke; [2003]; 18 pp.; In English; 40th Space Congress, 29 Apr. - 1 May 2003, Cape Canaveral, FL, USA; Original
contains black and white illustrations
Contract(s)/Grant(s): NAS10-98001
Report No.(s): KSC-2003-018; No Copyright; Avail: CASI; A03, Hardcopy
The Hazardous Gas Detection Lab is involved in the design and development of instrumentation that can detect and
quantify various hazardous gases. Traditionally these systems are designed for leak detection of the cryogenic gases used for
the propulsion of the Shuttle and other vehicles. Mass spectrometers are the basis of these systems, which provide excellent
quantitation, sensitivity, selectivity, response and limits of detection. Unfortunately, these systems are large, heavy and
expensive. This feature limits the ability to perform gas analysis in certain applications. Smaller and lighter mass spectrometer
systems could be used in many more applications primarily due to the portability of the system. Such applications would
include air analysis in confined spaces, in-situ environmental analysis and emergency response. In general, system cost is
lowered as size is reduced. With a low cost air analysis system, several systems could be utilized for monitoring large areas.
These networked systems could be deployed at job-sites for worker safety, throughout a community for pollution warnings,
or dispersed in a battlefield for early warning of chemical or biological threats. Presented will be information on the first
prototype of this type of system. Included will be field trial data, with this prototype performing air analysis autonomously
from an aircraft.
Author
Gas Detectors; Air Quality; Environmental Monitoring; Measuring Instruments; Prototypes
20030032362 AI Solutions, Inc., Lanham, MD, USA
Stationkeeping Approach for the Microwave Anisotropy Probe (MAP)
Rohrbaugh, Dave; Schiff, Conrad; [2002]; 10 pp.; In English; AIAA Guidance and Control Conference, Aug. 2002, Monterey,
CA, USA
Contract(s)/Grant(s): NASS-01090
Report No.(s): AIAA Paper 2002-4429; No Copyright; Avail: CASI; A02, Hardcopy
The Microwave Anisotropy Probe was successfully launched on June 30, 2001 and placed into a Lissajous orbit about
the L2 Sun-Earth-Moon libration point. However, the L2 libration point is unstable which necessitates occasional
stationkeeping maneuvers in order to maintain the spacecraft s Lissajous orbit. Analyses were performed in order to develop
a feasible L2 stationkeeping strategy for the MAP mission. The resulting strategy meets the allotted fuel budget, allowing for
enough fuel to handle additional he1 taxes, while meeting the attitude requirements for the maneuvers. Results from the first
two stationkeeping maneuvers are included.
Author
Stationkeeping; Microwave Anisotropy Probe; Attitude (Inclination)
20030032364 NASA Goddard Space Flight Center, Greenbelt, MD, USA
The Use of Transfer Radiometers in Validating the Visible through Shortwave Infrared Calibrations of Radiance
Sources Used by Instruments in NASA’s Earth Observing System
Butler, James J.; Barnes, Robert A.; [2002]; 22 pp.; In English; Copyright; Avail: CASI; A03, Hardcopy
The detection and study of climate change over a time frame of decades requires successive generations of satellite,
airborne, and ground-based instrumentation carefully calibrated against a common radiance scale. In NASA s Earth Observing
System (EOS) program, the pre-launch radiometric calibration of these instruments in the wavelength region from 400 nm to
2500 nm is accomplished using internally illuminated integrating spheres and diffuse reflectance panels illuminated by
irradiance standard lamps. Since 1995, the EOS Calibration Program operating within the EOS Project Science Office (PSO)
has enlisted the expertise of national standards laboratories and government and university metrology laboratories in an effort
to validate the radiance scales assigned to sphere and panel radiance sources by EOS instrument calibration facilities. This
state-of-the-art program has been accomplished using ultra-stable transfer radiometers independently calibrated by the above
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