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Technical Manual for RDMDB

Index : Technical Manual for Regional Data Bases

1. NEAR-GOOS Regional Real Time Data Base (RRTDB)

 (Ommission. See Regional Real Time Data Base Homepage.)

2. NEAR-GOOS Regional Delayed Mode Data Base (RDMDB)

 2.1 Retrievable data
 2.2 Data processing and quality control at RDMDB
 2.3 Data retrieval from RDMDB
 2.4 Provision of data to RDMDB
 2.5 Maintenance of RDMDB
 2.6 Various addresses of RDMDB


2. NEAR-GOOS Regional Delayed Mode Data Base (RDMDB)

 The Japan Oceanographic Data Center (JODC) operates the RDMDB. This manual describes the operation of the RDMDB.
 

2.1 Retrievable data

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 The following data can be retrieved from the RDMDB.

1) Data collected through the Regional Real Time Data Base (RRTDB).
 The following data are transferred to the RDMDB 30 days after they are received by the RRTDB.


2) Data collected through the National Delayed Mode Data Base (NDMDB).
 Data collected and managed by the NDMDB excluding those collected and managed via the National Real Time Data Base (NRTDB) are transferred to the RDMDB at regular intervals.

3) Data directly sent to the RDMDB
 These data include detailed oceanographic data that cannot be reported on a real time basis, such as CTD 2db water temperature and salinity data, moored current meter data and ocean wave data.

4) Other data
 Prompt report on current and temperature of the adjacent areas of Japan prepared by the Hydrographic and Oceanographic Department, Japan Coast Guard.
 

2.2 Data processing and quality control at RDMDB

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 Data transferred to the RDMDB after 30 days since they are received by the RRTDB are classified by type and each of the classified data received in a period of one month counting from the date of reception are compiled into one file. After that, these data are registrated in the RDMDB data retrieval system, which will be descripted later, so that they can be accessed by users. Basically, the same data format used at the RRTDB is accepted when data are compiled into files, and contents of data are not edited. Examples of file names are given below.
 

2005_07.bathy
BATHY data received by the RRTDB in July 2005.
2004_07.JAFIC
Data observed by the Japan Fisheries Information Service Center (JAFIC) in July 2004 and reported to the RRTDB.
2002_07.subst
All water temperature data collected by the RRTDB in July 2002, converted to the common format.
2000_04.sstanl
Daily North-West Pacific Ocean sea-surface temperature analysis data in April 2000 compiled by the Japan Meteorological Agency.


 Data not mentioned above are processed properly one by one. After that, they are registered in the RDMDB data retrieval system for access by users.
 A page containing information on file names and data formats for data collected and managed by the RDMDB is provided in the NEAR-GOOS RDMDB Homepage, which will be described later.
 

2.3 Data retrieval from RDMDB

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 The RDMDB can be accessed from the NEAR-GOOS RDMDB Homepage provided in the JODC WWW site.
 The main contents of the NEAR-GOOS RDMDB Homepage are as follows:


 The RDMDB data retrieval system displays a list of data by type and period so that a user can select data on the screen and retrieve it.
 For more information on the RDMDB data retrieval system, see the NEAR-GOOS RDMDB Homepage.
 

2.4 Provision of data to RDMDB

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 The users of the RDMDB data base are encouraged to contribute their data to the RDMDB to promote the exchange of oceanographic data. They can use any of the following options as a means to provide their data.

1) Retrieval of user's data by the RDMDB
 This method allows the RDMDB to retrieve data provided in WWW sites and ftp sites operated by various organizations. The RDMDB access users' WWW sites and ftp sites at regular intervals to retrieve data. Users who can allow the RDMDB to retrieve their data in this manner are requested to supply information on the format and contents of their data, file naming rules and data updating frequency to the RDMDB.

2) Provision of data to the RDMDB by users
 Users who wish to send data to the RDMDB, are requested to supply information on their data such as the format and contents of their data, file naming rules and data provision frequency to the RDMDB.

 Users may send data in any format to the RDMDB. The RDMDB will properly process data supplied to the RDMDB and then register them in the RDMDB data retrieval system together with catalog information so that they can be retrieved by users.
 

2.5 Maintenance of RDMDB

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 The RDMDB offers various online services of JODC including the JODC WWW site and also provides 24-hour data base operation on the data base operating system owned by JODC. However, system maintenance work or an unexpected failure of the system may suspend the RDMDB function. When a failure of the system occurs, the RDMDB administrator tries to restore the system as soon as possible.
 As a rule, the RDMDB administrator notifies users of RDMDB operational matters, such as temporary suspension of RDMDB operation due to maitenance work, in the notification page provided in the NEAR-GOOS RDMDB Homepage.
 

2.6 Various address of RDMDB

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 NEAR-GOOS RDMDB Homepage address and addresses used to send data are shown below :
 
NEAR-GOOS RDMDB Homepage
[ http://near-goos1.jodc.go.jp/ ]
Address used to send data to RDMDB (e-mail)
[ data-mg@jodc.go.jp ]
E-mail address of RDMDB administrator
[ jodc@jodc.go.jp ]