关于建立中国虚拟太阳天文台_CVSO_内容、计划等草案

Document Sample
关于建立中国虚拟太阳天文台_CVSO_内容、计划等草案 Powered By Docstoc
					The Virtual Solar Observatory
            (VSO)
      Huairou Solar Observating Station
     National Astronomical Observatories
       Chinese Academy of Sciences
                Ganghua Lin
Outline
    What is VSO
    Why is VSO
    Related Projects
    VSO’s initial Components
    Querying methods----before,now
    Meaning for Us to Join VSO
    Our basis
    Arckitecture of CVSO
    Related Web sites
What is VSO?
 The VSO is a new tool for investigating the
  physics of the Sun and its impact on the Earth
  environment. It would provide users with a
  common interface to an integrated system of
  distributed data archives (both space- and
  ground-based) and analysis systems, thereby
  enabling data exploration and accelerating the
  scientific process.
 The VSO will address one of the central
  challenges Of solar research: the need to locate,
  correlate, absorb, and analyze data from a wide
  array Of scientific instruments that measure the
  Sun on spatial and temporal scales that range
  over seven orders of magnitude.
What is VSO?

    This observatory is “virtual” because it
     exists only in the form of masses of
     information stored in computer systems.
      Why Is VSO
 The Sun exhibits complex phenomena,
such as flares, that pose important
challenges to our understanding of the
universe, Solar structure varies on time
scales from microseconds to decades and
on horizontal and vertical spatial scales
ranging from 10 to 106 km.
Why VSO
    Understanding solar structure, and ultimately
     predicting solar behavior, requires the
     correlation of many types of observations.
     These observations, which cover the entire
     electro magnetic spectrum as well as
     energetic particles, cannot be obtained with
     any single instrument or indeed at any single
     observatory. Thus, the data are stored in a
     myriad of locations, in dozens of formats, and
     analyzed by numerous applications.
Why VSO
   A researcher who wishes to combine several
  data sets faces the tasks of finding the data
  somewhere in the world, searching each set
  for the observations that most nearly fulfill the
  precise scientific requirements, arranging to
  have the data delivered, and mastering the
  various storage formats and calibrations.
  These labor-Intensive steps must be
  completed before any analysis can even begin,
  and have deterred many researchers from
  performing studies that would provide valuable
  new insights into solar structure and the
  mechanisms of solar activity and variability.
Why is VSO
 In spite of the difficulty of using such data systems,
  solar physics and the others have long exploited
  the scientific richness of cross-correlative studies.
 This process of locate, correlate, absorb, and
  analyze data is extraordinarily time-consuming
  and labor-intensive; yet it is pursued.
 The VSO will greatly increase the power and pace
  of the correlative studies needed to address
  fundamental challenges such as predicting
  geomagnetic storms, understanding solar
  irradiance variations and their effect on the Earth
  environment, detecting active regions below the
  solar surface before they cause solar activity, and
  understanding the generation of the solar wind,etc.
Related projects
  EGSO (European Grid of Solar Observations). It
   is taking a more highly structured approach,
   with formal Work Packages and a more
   ambitious set of design goals.
  SEC (the Solar Event Catalogue) server, which
   hosts event catalogues (flares, CME, etc.) and
   indices gathered from a number of sources and
   updated daily.
  SFC (Solar Feature Catalogue) for sunspots,
   active regions and filaments.
  DSO (Database of Solar Observatories)
   contains detailed information about all
   instruments and observatories
Related projects

    Scientific Use Cases: such as, Flare
     impulsive phase: energy deposition,
     determine the conditions that lead to the
     onset of a flare, solar wind acceleration
     in the corona, comparison of coronal and
     in-situ solar wind diagnostics,
     phenomena associated with CME onset,
     etc
Related projects
   NASA Living With a Star (LWS): There is
    a broader effort under way to provide a
    data environment for NASA’s Living With
    a Star program. Ideally, the VSO should
    “plug and play” with such a system.
   CoSec (the Collaborative Sun-Earth
    Connector),
   VSPO (Virtual Space Plasma
    Observatory),
   VHO (Virtual Heliospheric Observatory)
VSO’s initial Components
   The VSO is a scalable environment for
    searching, integrating, and analyzing databases
    distributed over the Internet. Initially, It would
    comprise a federated system of solar archives
    containing data from space- and ground-based
    instruments, from US and international sources,
    from NSF- and NASA-funded groups. A key
    element of the VSO is an integrated data-
    mining and analysis capability that can be
    applied both across and within databases.
VSO’s initial Components
    NSO(National Solar Observatory): spectral atlases,
     magnetograms (photospheric and chromospheric),
     Dopplergrams, synoptic maps (magnetic field and other
     parameters), coronal emission-line scans, GONG,
     (Global Oscillations Network Group); and GONG+, and
     SOLIS (Synoptic Optical Long-term Investigation of the
     Sun);
    SDAC (Solar Data Analysis Center): a variety of space
     mission and ancillary data: SOHO,TRACE, Yohkoh,
     CGROBATSE solar flare data, GOES soft X-ray
     photometry, SMM, OSO-7 raster images, Solar-B (from
     2005), STEREO (from 2005);
    Stanford University solar group: SOHO MDI, Wilcox
     Solar Observatory magnetograms,TON helioseismology
     database, Mt. Wilson 60-ft. tower data, LOWL
     helioseismology database
Querying methods
-----------before
Querying methods
-----------now
Meaning for us to Join VSO

  To look toward international front edge,
   put limited energy in advantaged project.
  This would brings us both many new
   chances and challenges. Through the
   bridge to the VSO, Chinese solar
   physical scientist will enjoy latest
   technologies and astronomy
   achievement of the worldwide,
   meanwhile also share our own sources
   with international colleagues.
Our basis
   Data:
 photospheric magnetogram and filtergram:1987.6.12----
    now
 chromospheric magnetogram:1987.6.12----now
 H-alpha filtergram:1991----now
 H-beta filtergram:1987.6.12----now
 full disk H-alpha image:1991----now
 full disk CaII image:1991----1997, upgrading now
 full disk photospheric magnetogram: 1991----1997,
    upgrading now
  Data processing:
       the existence of an extensive software package
    created by our experiment group
Our basis

  Network: fiber line in huairou station
  security system: firewall, antivirus,etc
  Data automatically backup function
  Now we are implementing conversion
   from huairou data model to VSO Data
   Model
Arckitecture of CVSO

                Users lever




             assembling level




              Resource level




             Construction level
Related Web sites

  http://solarvirtual.org
  http://www.mssl.ucl.ac.uk/grid/egso/soft
   ware/

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:0
posted:4/18/2013
language:English
pages:26