103 research outputs found
Radiometric measurements of the microwave emissivity of foam
Includes bibliographical references.Radiometric measurements of the microwave emissivity of foam were conducted during May 2000 at the Naval Research Laboratory's Chesapeake Bay Detachment using radiometers operating at 10.8 and 36.5 GHz. Horizontal and vertical polarization measurements were performed at 36.5 GHz; horizontal, vertical, +45°, Â45°, left-circular, and right-circular polarization measurements were obtained at 10.8 GHz. These measurements were carried out over a range of incidence angles from 30° to 60°. Surface foam was generated by blowing compressed air through a matrix of gas-permeable tubing supported by an aluminum frame and floats. Video micrographs of the foam were used to measure bubble size distribution and foam layer thickness. A video camera was boresighted with the radiometers to determine the beam-fill fraction of the foam generator. Results show emissivities that were greater than 0.9 and approximately constant in value over the range of incidence angles for vertically polarized radiation at both 10.8 and 36.5 GHz, while emissivities of horizontally polarized radiation showed a gradual decrease in value as incidence angle increased. Emissivities at +45°, Â45°, left-circular, and right-circular polarizations were all very nearly equal to each other and were in turn approximately equal to the average values of the horizontal and vertical emissivities in each case.This work was sponsored by the Department of the Navy, Office of Naval Research under Award N0014-00-1-280 to the University of Massachusetts, Award N00014-00-0152 to the University of Washington, and Award N0001400WX21032 to the Naval Research Laboratory
3D-Printed Stationary Phases with Ordered Morphology: State of the Art and Future Development in Liquid Chromatography Chromatographia
On the diffraction of sound by a screen with circular apertures in the presence of a low Mach number grazing flow
PERROS Y GATOS, GUARDIA Y PROTECCIĂN EN LOS HOGARES INDĂGENAS DE UNA LOCALIDAD CHAMULA (CHIAPAS, MĂXICO)
ESTUDIO DE SISTEMAS GANADEROS SUSTENTABLES MEDIANTE UN PROCESO METODOLĂGICO ESTANDARIZADO
Guest Editorial Foreword to the Special Issue on the 9th Specialist Meeting on Microwave Radiometry and Remote Sensing Applications (MicroRad â06)
HE 9th Specialist Meeting on Microwave Radiometry and
Remote Sensing Applications (MicroRad â06) was held
from February 28 to March 3, 2006, in San Juan, Puerto Rico,
a Commonwealth of the USA. The conference was chaired by
Dr. Steven Reising of Colorado State University, Fort Collins,
and the local organizing chair was Dr. Sandra Cruz-Pol of
the University of Puerto Rico at MayagĂŒez. The objective of
MicroRad â06 was to provide an open forum to report and
discuss recent advances in the field of microwave radiometry
and to gather all parties, including the research, industrial,
and academic communities, who are involved in projects and
studies in microwave radiometry of the land, oceans, and atmosphere.
The meeting was highly successful, with 125 participants
from 15 countries, 146 submitted abstracts, 80 oral
presentations, and 50 interactive posters during four full days of
sessions.
MicroRad â06 is the most recent in a series of meetings
focusing on Microwave Radiometry and Remote Sensing of
the Environment, dating back to 1983 when the first MicroRad
meeting was organized and hosted by the late Prof. Giovanni
dâAuria of the University âLa Sapienzaâ of Rome, Italy. An
In Memoriam article for Prof. dâAuria appeared on p. 8 of the
IEEE GRSS Newsletter, Issue #142, March 2007. The second
MicroRad meeting was held in Florence, Italy, organized and
chaired by Dr. Paolo Pampaloni at Istituto di Ricerca sulle Onde
Elettromagnetiche, Consiglio Nazionale delle Ricerche. Since
then, MicroRad meetings have been held approximately every
2 1/2 years, alternating between the USA and Italy. Previous
MicroRad meetings in the USA were held in Boulder, CO (1992
and 2001), and in Boston, MA (1996). The MicroRad meetings
in Italy were convened in Rome at âLa Sapienzaâ (1983 and
2004) and at âTor Vergataâ (1994), as well as in Florence (1988
and 1999).
The technical program of MicroRad â06 opened with a
session on microwave radiometer calibration, featuring presentations
on current and planned radiometer systems by representatives
of government agencies, industry, and universities. The
focus on sensors continued with a session devoted to instru-
Digital Object Identifier 10.1109/TGRS.2007.900318
mentation and advanced techniques and one on radiofrequency
interference (RFI) mitigation. The first day concluded with a
session on experimental campaigns, which included airborne
and ground-based measurements as well as calibration and validation
of spaceborne sensors. The second day shifted to consideration
of science application areas, which began with a session
on soil moisture and salinity satellite missions at L-band. This
was followed by sessions focusing on ocean wind, sea ice,
electromagnetic modeling of the sea surface, and snow cover.
The morning of the third day focused on land surfaces with sessions
on snow cover, soil moisture, vegetation, and electromagnetic
modeling of microwave emission from the land and the
cryosphere.
On the afternoon of the third day, the emphasis shifted to
weather and the atmosphere, starting with two sessions on
retrieval methodologies and radiance assimilation. These included
four presentations from government laboratories on both
sides of the Atlantic to highlight rapid advances in numerical
weather prediction and direct applications of satellite radiances.
Finally, the fourth and final day of MicroRad â06 focused on
atmospheric remote sensing, which emphasized temperature
and humidity in the morning and clouds and precipitation in
the afternoon, including many presentations on ground-based
techniques and sensor design.
At the conclusion of each of the 16 oral sessions of
MicroRad â06, the co-chairs introduced the poster papers on
the topic of the session. The long coffee breaks each morning
and afternoon provided plenty of time for discussion with poster
presenters, which gave the conference the distinctive academic
flavor typical of MicroRad meetings
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