2002-10-17
Jan 22, 2016
2002-10-17
• Brief Introduction of LAMOST
• Brief Introduction of BADC
• Virtual Observatory of China
• VO-oriented LAMOST
LAMOST
MAIN CHARACTERISTICS
有效通光孔径 (Clear aperture): 4m
视场角直径 (Field of view): 5°
焦面线直径 (Focal plane): 1.75m
焦距 (Focal length): 20m
光纤数 (Number of fibers): 4000
光谱覆盖范围 (Spectral range): 370~ 900nm
光谱分辨率 (Spectral resolution):1 ~ 0.25nm
观测天区 (Sky coverage): Declination -10 to +90
固定球面主镜MB
Fixed Spherical Mirror
焦面Focal Plane
改正镜MA
Corrector Mirror
光纤Fiber Optics
光谱仪 Spectroscopies
LAMOST
LAMOST
Scientific aims :• Extra-galactic spectroscopic survey — Large scale structure of the universe
• Stellar spectroscopic survey — Structure of the Galaxy
• Cross identification of multi-waveband surveys —Virtual Observatory
LAMOST 星系红移巡天样品空间分布图(数值模拟结果)
Sample space distribution of the
LAMOST galaxy survey
(numerical simulation results)
• Brief Introduction of LAMOST
• Brief Introduction of BADC
• Virtual Observatory of China
• VO-oriented LAMOST
World Data Center for Astronomy
Beijing Astronomical Data Center (BADC)
• CDS/ADC catalogs
• USNO-A1.0
• USNO-A2.0
• Hipparcos/Tycho catalogs
• RealSky atlas
• DSS
• DSS-II
• Einstein X-ray archives
• ROSAT X-ray archives
• NASA/ADS mirror
• Astronomy Yellow page
• Software warehouse
• 2MASS• BATC (Beijing-Arizona-Taiwan-
Connecticut )
BADC Resources
• SDSS SX will be mirrored as soon as it is available
CPU MEM Capacity NIC
Intel P4 1.2GHz×10
1GB×5 80GB+20GB×4+1TB×4=4.16TB
100 MbpsD-link Switcher
Cost <200, 000 RMB (24, 000 USD)
ADS mirror server(8-1) × 80 GB=560 GB
RAID 5
Hardware Environments
• Brief Introduction of LAMOST
• Brief Introduction of BADC
• Virtual Observatory of China
• VO-oriented LAMOST
China-VO
The Advantages of Building China-VO
• Acquire data and technologies from other IVOA partners
• Share our data (LAMOST, SST, FAST, BATC …) with international astronomers
•Provide a convenient portal for native users accessing national and international archives
• Bring up a group of VO-oriented astronomers, engineers and students
• Education outreach
China-VO
Data Data Data Data
Processing
ProcessingProcessing
Simple Search Advanced Search
Mining & Discovery
Statistic and AnalysesVO Resource
Manager
PortalJava Servlet HTTPS
OGSA
XMLVOTable
XMLFITS
XMLJPG
XML…
PHP
C++ Java
SQL, XQuery SkyQuery, AML
WebService
WebService
China-VO
Characteristics of China-VO
Focusing on Spectrum Automatic Processing and Relevant Technology
• Automatic processing for multi-fiber spectrum data• Spectrum line automatic extraction • Automatic classification of Spectrum data• Redshift measurement • Cross-identification between spectrum data and other data• Visualization
Based on core services (Metadata services, Simple search patterns, Simple functions) provided by IVO, we try to realize:
China-VO
Current Partners
• Department of Astronomy, Beijing Univ.
• Beijing Astrophysical Center, CAS-PKU
• Astrophysical Center, Tsinghua Univ.
• Supercomputing Center, CAS
• Institute of Computing Technology, CAS
• Brief Introduction of LAMOST
• Brief Introduction of BADC
• Virtual Observatory of China
• VO-oriented LAMOST
VO-LAMOST
LAMOST will select observing objects from VO
Multi waveband sky survey archives, i.e. FIRST, NVSS, 2MASS, IRSA , SDSS, POSS…
LAMOST will enhance astronomical spectrum resources greatly with its output
LAMOST vs. SDSS = 4000 : 600
VO provides opportunities and challenges to LAMOST
VO-LAMOST
Just from the beginning:
VO-oriented LAMOST metadata model
VO-oriented LAMOST data model
VO-oriented Atomic services and toolkits
Preserve metadata as much as possible
Roadmap for China-VO
•2002.7 : Draft of China-VO Architecture.•2002.10: Online access for most collected archives; Join in
IVOA.•2003.1 : System requirement analyse and scientific goals
definition; Architecture design; Initial web services design. •2003.5 : Initial online access to China-VO•2003.8 : Initial China-VO functional demo•2003.10: VO-oriented LAMOST Data Model (LmstD) 1.0•2004.1 : China-VO 1.0 •2004.10: LmstD 2.0•2005.1 : China-VO 2.0
Now, We urgent need:
Experts in data-based computing Astronomy
Attendees with skills of: XML, OGSA, Java, Database
Cooperation National and International
Money
References and Links
China-VO http://www.china-vo.org
LAMOST http://www.lamost.org
Beijing Astronomical Data Center http://badc.lamost.org
National Virtual Observatory (US) http://www.us-vo.org