2012年10月24日 星期三

Telecommunication Systems (2)



GTS of WMO

The coordinated global system of telecommunication facilities and arrangements for the rapid collection, exchange and distribution of observations and processed information within the framework of the World Weather Watch. from WMO No 49 Technical Regulations.



Inserting data

Data is inserted onto the GTS by operational centers in real time, in the form of GTS reports which are embedded within GTS bulletins identified by GTS bulletin headers to make sure they reach the right operational centres. A number defined by WMO identifies a platform within the messages.
Accessing data

Users can then access data via national meteorological centres. Information about accessing data is available on under data access.



Delays

The DBCP strives to improve data throughput from all buoys and reduce the delays experienced between a measurement being taken and the reception of the data by forecasters and modeling centers.

The biggest source of delays is between the buoy and the satellite and then between the satellite and the ground station or data processing center. As bandwidth on connections between GTS centers is now usually very good that is not a significant source of delay. The improved satellite telecommunications available today have reduced the delays in the system, in the last 20 years.

This is an area that the DBCP works hard to improve across the global ocean.

A 'GTS delays' map is produced to show average delays for the buoy network each month.




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