Abgeschickt von Marius Rensen am 01 Juli, 2006 um 08:32:25
Antwort auf: Meteosat7, analog transmissions switched off von Michael Koch am 29 Juni, 2006 um 15:59:09:
Hello Michael,
The weather facsimile (WEFAX) service consists of analogue transmissions to low-cost meteorological user stations within the reception area of meteorological satellites. The WEFAX service parameters were defined and agreed by the Co-ordination Group for Meteorological Satellites (CGMS). WEFAX services are operated by the following satellite systems:
• GOES-E (USA);
• GOES-W (USA);
• GMS (JAPAN);
• GOMS (Russia); 1.7 GHz - transmission (relay) of digital, alphanumeric, and facsimile information processed at the receiving centers to APPI's
• METEOSAT (EUMETSAT); Terminated
• FY-2 (China).
The transmission of WEFAX services is in the sub-band 1690 – 1698 MHz. Most WEFAX services have a centre frequency of 1691 MHz and a bandwidth between 0.030 and 0.260 MHz. Typical WEFAX reception stations operate at elevation angles greater than 3 deg; use antennas of 1.2 m diameter; and correspond to a figure of merit G/T of 2.5 dB/K. Content of WEFAX transmissions are sectors of satellite imagery, meteorological products in pictorial presentation, test images and administrative messages containing alphanumerical information in pictorial form. The analogue WEFAX service will be replaced by digital low rate information transmission (LRIT) service on second-generation meteorological satellite systems.
So after terminated the Metosat, there are no more analogue WEFAX transmissions here over Europe from Weather Satellites.
Marius
: Hi,
: after the analog transmissions from Meteosat7 have been finaly switched off, is there any use for a Grundig MST-100 receiver, or can I trash it?
: Are there any other weather satellites sending analog data in the 1691 & 1694.5 MHz range?
: Thanks,
: Michael