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TOPAZ system forecasting

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Topaz System has no web interface to present it's product(netCDF files) ... Compatibility of TOPAZ netCDF files with the existing applications (Conventions ... – PowerPoint PPT presentation

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Title: TOPAZ system forecasting


1
Title
  • TOPAZ system forecasting
  • product presentation
  • (modeling netCDF files)?

2
Introduction
  • Student
  • Goran Zangana
  • Supervisers
  • Carsten Helgesen
  • Torill Hamre
  • Laurent Bertino

3
Topics of content
  • Nansen Center.
  • Topaz System.
  • Today's situation.
  • Forecating Examples.
  • TOPAZ system product format (netCDF files).
  • OPeNDAP DODS (dds,das,......).
  • Overview over some of OPeNDAP clients.
  • OPeNDAP applications atchitecture.
  • Some applications structure.
  • What have been done?What are challenges?

4
Nansen Center
  • Nansen Environmental and Remote Sensing Center
    (NERSC) is an independent non-profit research
    institute affiliated with the University of
    Bergen, Norway. The Nansen Center conducts basic
    and applied environmental research funded by
    national and international governmental agencies,
    research councils and industry.

5
Topaz System
  • Topaz is a forecasting system for the ocean_sea
    parameters (temp., salinity,.....) at Nansen
    center.
  • The Topaz domain covers North Atlantic and
    Arctic.
  • Topaz product users
  • Noncommercial User
  • Global Oceanography researcher, participants in
    operational oceanography projects.
  • Commercial User
  • 2.1 Offshore operations industries
  • 2.1.1 Oil industries.
  • 2.1.2 ship traffics.
  • 2.1.3 fishing industries.
  • 2.2 Offshore operations personnel.

6
Today's situation
  • Topaz System has no web interface to present it's
    product(netCDF files).

7
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8
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9
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10
netCDF files(Input Data)?
  • netCDF(Network Common Data Format)
  • is a set of software libraries and
    machine-independent data formats that
  • support the creation, access, and sharing of
    array-oriented scientific data.
  • netCDF library NCO (netCDF Operator).

11
netCDF file architecture
12
netcdf topaz_V3_mersea_nat_grid1to8_da_class1_b200
80305_f200803149999 dimensions
longitude 869 latitude 441
depth 12 variables float
longitude(longitude)
longitudeaxis "X"
longitudestandard_name "longitude"
longitudeunits "degrees_east"
longitudevalid_range -180., 180.
longitudelong_name "longitude"
float latitude(latitude)
latitudeaxis "Y"
latitudeunits "degrees_north"
latitudevalid_range -90., 90.
latitudestandard_name "latitude"
latitudelong_name "latitude"
13
netCDF files continue....
  • Which netCDF type are they?
  • Grid data (Class 1)?
  • Rectilinear
  • Curvilinear
  • In-Situ data (Class 2)?
  • Stations
  • Sections (profiles)?
  • Time series data comparison data (Class 3)?

14
OPeNDAPDODS(dds,das,...)
  • OPeNDAP (Open-source Project for a Network Data
    Access Protocol)
  • is internet protocol for remotely accessing
    scientific data.

15
OPeNDAPDODS(dds,das..) cont...
  • DODS (Distributed Oceanographic Data System).
  • Is a system that allows you to access data over
    the internet using OPeNDAP, from programs that
    weren't originally designed for that purpose.
  • With DODS, you access data using a URL, just like
    a URL you would use to access a web page.
  • DDS
  • The Data Descriptor Structure (DDS) is a data
    structure used by the DODS software to describe
    datasets and subsets of those datasets.
  • DAS
  • The Data Attribute Structure (DAS) is a set of
    name-value pairs used to describe the data in a
    particular dataset
  • These are the structures of the netCDF meta_data
    which DODS provides and they are stored in an
    application server or in a database account.

16
Overview over some of OPeNDAP clients
  • CDAT (Climate Data Analysis Tools).
  • Matlab
  • Ferret
  • ncBrowse
  • ncview
  • NCO (netCDF Operators).
  • OPeNDAP Data Connector.
  • LAS (Live Access Server)?
  • DChart(Dapper Data Viewer)?

17
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18
Some applications structure
  • Dapper-DChart.
  • http//eva.nersc.no8183/dods/
  • http//eva.nersc.no8183/dchart/
  • LAS (Live Access Server)?
  • http//topaz.nersc.no/las/servlets/dataset
  • http//topaz.nersc.no8182/las/v7alphaUI.html

19
Dapper architecture
OPeNDAP Protocol (HTTP)?
Dapper HTTP Server
OPeNDAP clientDChart

CORBA (IIOP)?

Climate Data Portal


Java netCDF library
MySQL

20
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21
What have been done?
  • Analyzing understanding the problem.
  • Installation, implementation of both
    dapper-dchart LAS applications the
    prerequisites softwares by them.
  • Integration LAS with Thredds.
  • Presentation of class 1 for both NAT ARCTIC in
    LAS.

22
What are challenges?
  • Class 2 Class 3
  • Compatibility of TOPAZ netCDF files with the
    existing applications (Conventions for
    standardization of TOPAZ netCDF files following
    COARDS Cooperative Ocean/Atmosphere Research
    Data Service).
  • Pacific Marine Environmental Laboratory (PMEL)
    provided the EPIC software package for
    oceanographic data. PMEL has developed the EPIC
    system library (EPS library), which is layered on
    top of the netCDF input/output library, to write
    netCDF files with the conventions to recommended
    standard implementation.
  • http//www.epic.noaa.gov/epic/eps-manual/epslib_to
    c.htmlSEC30
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