Title: TOPAZ system forecasting
1Title
- TOPAZ system forecasting
- product presentation
- (modeling netCDF files)?
2Introduction
- Student
- Goran Zangana
- Supervisers
- Carsten Helgesen
- Torill Hamre
- Laurent Bertino
3Topics 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?
4Nansen 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.
5Topaz 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.
6Today's situation
- Topaz System has no web interface to present it's
product(netCDF files).
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10netCDF 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).
11netCDF file architecture
12netcdf 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"
13netCDF 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)?
14OPeNDAPDODS(dds,das,...)
- OPeNDAP (Open-source Project for a Network Data
Access Protocol) - is internet protocol for remotely accessing
scientific data.
15OPeNDAPDODS(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.
16Overview 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)?
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18Some 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
-
-
19Dapper architecture
OPeNDAP Protocol (HTTP)?
Dapper HTTP Server
OPeNDAP clientDChart
CORBA (IIOP)?
Climate Data Portal
Java netCDF library
MySQL
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21What 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.
22What 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