Status Report

SISnet – Satellite navigation information via the Internet / ESA TV Exchanges / 06-09-2002

By SpaceRef Editor
September 5, 2002
Filed under , ,

The next transmission of the ESA TV Service will be:

06-Sep-02 09:15 – 09:30 GMT

SISnet – Satellite navigation information via the Internet

ESA TV Exchanges

Background information on the transmission:

Replay I: 06 September 18:45 – 19:00 GMT

Replay II: 07 September 07:00 – 07:15 GMT

SISnet is an innovative system to put the full power of satellite navigation at the disposal of everybody with access to the Internet. The SISnet information includes the corrective data for the GPS satellite navigation system to make it accurate to about two metres. This data is broadcast by the European EGNOS transponders using several geostationary satellites, along with other data to improve the availability and integrity of the GPS system.

However, the EGNOS satellite signals are sometimes difficult to receive, notably in the Nordic countries and in the centre of towns. Here SISnet comes into play by providing this information via the Internet, using, for example, a mobile GSM connection from a handheld navigation terminal. The SISnet technology was developed in Finland under ESA contract.

Today’s transmission includes images of the SISnet terminal and trials in a car, as well as soundbites by technical experts from ESA and the Finnish company responsible for the development.

The 5-minute A-roll contains split audio with an English guide track and is complemented by a B-roll with international sound only. The script will be made available on-line as a PDF document under

A Media-Player pre-view can be downloaded from
This ESA TV Exchanges feed is transmitted by the European Commission’s “Europe by Satellite” (EbS) service. You can find the complete transmission schedule and download scripts and shot lists, also for ESA TV items, from the EbS Web site at

More background information can be found on .

Transmission details:EUTELSAT HOT BIRD at 13? East (DVB/MPEG-2)

Horizontal, F=12,476 MHz (MCPC, Europe by Satellite)

SR=27,500 MS/sec, FEC=3/4

For further information, visit our website at For other enquires, contact Claus Habfast, Tel +31 71 565 3838, Fax +31 71 565 6340, e-mail

SpaceRef staff editor.