NASA Scientific and Technical Aerospace Reports

een purchased. The instrument has been delivered. The startup time for this instrument is relatively short and we expect to
be collecting our first data by mid-summer.
Author
Mass Spectrometers; Inductively Coupled Plasma Mass Spectrometry; Cosmochemistry; Geochemistry
20040074209 NASA Stennis Space Center, Bay Saint Louis, MS, USA
PITCON 2002: New Product Forum
Bailey, John; March 17, 2002; 29 pp.; In English; PITTCON 2002, 17-22 Mar. 2002, New Orleans, LA, USA
Report No.(s): SE-2002-03-00016-SSC; No Copyright; Avail: CASI; A03, Hardcopy
The Radiant Temperature Nulling Radiometer and the Polarization Enhanced Thermal Radiometer, which can measure
water body temperatures, are potentially useful for the calibration of remote sensing instruments. The design and operation
of both instruments are described in this viewgraph presentation.
CASI
Radiometers; Product Development
20040074241 NASA Goddard Space Flight Center, Greenbelt, MD, USA
Atmospheric and Surface Reflectance Measurements by the Geoscience Laser Altimeter System
Spinhirne, James D.; Palm, Steven P.; Hlavka, Dennis L.; Hart, William D.; Mehesh, Ashwin; Welton, Ellsworth J.; [2004];
2 pp.; In English; AGU Meeting, 8-12 Dec. 2003, San Francisco, CA, USA; No Copyright; Avail: Other Sources; Abstract
Only
The Geoscience Laser Altimeter System launched in early 2003 is the first satellite instrument IC space to globally
observe the distribution of clouds and aerosol through laser remote sensing. The instrument is a basic backscatter lidar that
operates at two wavelengths, 532 and 1064 nm. The mission data products for atmospheric observations include the calibrated,
observed, attenuated backscatter cross section for cloud and aerosol; height detection for multiple cloud layers; planetary
boundary layer height; cirrus and aerosol optical depth and the height distribution of aerosol and cloud scattering cross section
profiles. The data will enhance knowledge in several areas of atmospheric science: the distribution, transport and influence of
atmospheric aerosol, significantly more accurate measurements of the coverage and height of cirrus and other clouds, polar
cloud climatology and radiation influence, the dynamics planetary boundary layer and others. An overview and summary of
initial results are presented. Initial results from the first months of operation show the detailed height structure of clouds and
aerosol on a global basis as expected. The 532 nm channel was expected to be the more sensitive and primary channel for
aerosol measurements, but extensive aerosol loading in many regions are observed by the 1064 nm channel. Sensitivities are
down to a few times l0(exp 6) l/(m-sr), much better than originally expected. The 532 channel adds an order of magnitude
addition sensitivity. Initial comparisons to aerosol models have been done. Similarly for global cloud cover, good results are
obtained just from the 1064 nm channel and from both channels, a measurement of multiple layers and cloud overlap has been
made. Antarctica observations show high levels of total cloud cover including unique low-level cirrus and blowing snow. Data
products have been generated for cloud, aerosol and PBL presence and heights in addition to the basic scattering cross section
profiles.
Derived from text
Laser Altimeters; Cloud Physics; Aerosols; Surface Properties; Scattering Cross Sections; Remote Sensing
20040074254 Missouri Univ., Rolla, MO, USA
Manipulation of Microenvironment with a Built-in Electrochemical Actuator in Proximity of a Dissolved Oxygen
Microsensor
Kim, Chang-Soo; Lee, Cae-Hyang; Fiering, Jason O.; Ufer, Stefan; Scarantino, Charles W.; Nagle, H. Troy; Fiering, Jason O.;
Ufer, Stefan; Nagle, H. Troy; Scarantino, Charles W.; June 09, 2004; 24 pp.; In English
Contract(s)/Grant(s): NAG9-1423; 01-OBPR-01; Copyright; Avail: CASI; A03, Hardcopy
Abstract - Biochemical sensors for continuous monitoring require dependable periodic self- diagnosis with acceptable
simplicity to check its functionality during operation. An in situ self- diagnostic technique for a dissolved oxygen microsensor
is proposed in an effort to devise an intelligent microsensor system with an integrated electrochemical actuation electrode.
With a built- in platinum microelectrode that surrounds the microsensor, two kinds of microenvironments, called the
oxygen-saturated or oxygen-depleted phases, can be created by water electrolysis depending on the polarity. The functionality
of the microsensor can be checked during these microenvironment phases. The polarographic oxygen microsensor is fabricated
on a flexible polyimide substrate (Kapton) and the feasibility of the proposed concept is demonstrated in a physiological
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