Introduction to Dept. of Communications & Computer Engineering (Part 2) Mamoru YAMAMOTO Research Insititute for Sustainable Humanosphere (RISH), Kyoto University (Dept of Communications & Computer Engineering) E-mail: [email protected]Kyoto University Clock Tower Building August 2009
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Introduction to Dept. of Communications & Computer Engineering (Part 2)
Mamoru YAMAMOTO
Research Insititute for Sustainable Humanosphere(RISH), Kyoto University
Internet, optical fiber and cellular system have made significant & incredible progress during last a few decades
High performance computing combined withBroadband Networks (optical fiber (backbone) + various wireless access systems) (in terms of coverage) , i.e., from mega-cell to body area network (BAN) or RFID tag.
Remote sensing: another aspect of ICT, used for social safety/security and environmental research. All contributing to the realization of so-called “ubiquitous network society”
Research Groups in Dept of CCE :
Computer EngineeringLogic Circuits, Algorithms and Complexity Theory (Iwama)Computer Architecture (Tomita-retired 2009)Computer Software (Yuasa)
Communications Systems EngineeringDigital Communications (Yoshida)Integrated-Media Communications (Morikura)Intelligent Communication Networks (Takahashi)
Integrated Systems EngineeringProcessor Architecture and Systems Synthesis (Takashi Sato)Integrated Circuits Design Engineering (Onodera)Advanced Signal Processing (Toru Sato)
Radio Atmospheric Sciences (Research Institute for Sustainable Humanosphere)
Operational wind profiler network over JapanWINDAS:Wind Profiler Network and Data Acquisition System
Data center
Data center/Weather model
31 LTRs are located and used for everyday weather forecasting.
Lower Troposphere Radar (LTR)
GPS Signals received on a low earth orbiting (LEO) satellite are used for an active limb sounding of the atmosphere and ionosphere.
During a rising or setting of a GPS satellite (occultation), the radio rays between the GPS and LEO satellites successively scan the atmosphere (and the ionosphere) from the receiver height down to the surface. A refractive index profile can be retrieved from the time variations of the ray bending angles.
Bending AngleLEO Satellite
Tangent Point
GPS Satellite
Propagation Delay of GPS Signals
Determination of LEO Orbit
Bending of Radio Ray Path
Refractive Index Profile near the Tangent Point
Humi-dity
Tempe-rature
ElectronDensity
Data Assimilation Into NWP models
Basic Concept of GPS Occultation Measurement
Comparison of temperature profiles between the COSMIC GPS RO result (#49 and #50) and radiosonde at Kuching, Malaysia.Profiles are shifted by 5K each.
Temperature profiles with GPS RO have a height resolution comparable to a radiosonde, which is useful for the studies of the detailed structure of the tropopause, perturbations with atmospheric waves, etc.
#50
#49
Kuching
COSMIC
Radio beacon experiment of the ionosphere
Dual-band (150MHz/400MHz) beacon transmitted from satellite is received on the ground.Radiowave ray paths are bended from the shortest path depending at different frequency.Detecting phase difference between two signals, total electron content (TEC) of the ionosphere can be estimated.
RaidowavepathShortest
path
Satellite
Ionosphere
Receiver on the ground
GNU Radio Beacon Receiver
We develop a digital beacon receiver by using the open hardware/software.
・ LINUX PC・ GNU Radio
Software toolkit for SDR (Software Defined Radio), a free software.
・ USRP (Universal Software Radio Peripheral, see picture)A/D + signal processing board well associated with GNU Radio.
Picture of USRPGNU Radio http://gnuradio.org/tracUSRP http://www.ettus.com
MF radar, PontianakWest Kalimantan(1995- ) U. Adelaide
Hemispheric ComparisonThe MU radar (Shigaraki), MF radar (Adelaide-U)
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MF radar, Pameungpeuk (2004-)
Coordinated Observation of Equatorial Atmosphere Dynamics in Indonesia
Coordinated Observation of Equatorial Atmosphere Dynamics in Indonesia
Regional network in IndonesiaMeteor radar (Jakarta,
SummaryCCE covers studies for designing and physical properties of LSI.(Takashi Sato lab., Onodera lab.)Another important use of ICT technology is remote sensing.(Toru Sato lab. + RISH labs)CCE holds two labs that belong to RISH. They do,
Development of various remote sensing techniques for the atmosphere/ionosphere.
MU radar, and Equatorial Atmosphere Radar (Indonesia)GPS occultation, Satellite beacon, Lidar, etc.
Study atmosphere dynamics by utilizing the instruments.Our studies contribute social safety/security, and
environmental research.Many instruments and observation sites are located in
Southeast Asian countries including Thailand and Vietnam.