If it is not question of money than Torus antenna would be good option
http://www.gdsatcom.com/Antennas/Data_Sheets/655-0037C_7M_Torus.pdf
Are you speaking about 2 separate antennas? Why call them "Siamese Toroidal Satellites Antenna"? If 2 antennas than no need to point then East and West, should be South-East and South-West.
If Google does not bring any positive results, try to install usual motorized antenna and, who knows, maybe it's noise level will acceptable.
Hello RimaNTSS
First thanks for your informative and illustrative response. I love links to information as it affords me the luxury of reading the data myself! So thank you for the excellent data presented in your link.
I am researching the satellite dish identified in the link option as we speak. I will speak to
General Dynamics SATCOM Technologies about their Torus antenna in my application!
I do have a technical question however; given what I have learned in this forum; I now know that the reason a motorised system can deliver superior satellite performance and signal to noise ratio is because it can dedicate and maximise the collection capabilities of the mounted LNB’s on the antenna while pointed at a single satellite, even though there are disadvantages when moving between lets say 48º E and 12.5º W. I have a friend here with a ground station on her horse ranch near my home; of course she has no nose abatement problems because she lives on 5 hectares property and far enough from her neighbours that noise is not an issue.
Her "satellite rig & dish" is above 300cm in size and has a semi-fluid (viscous fluid of some sort?) gimbal mount on which the dish rotates as needed? He system also has a GPS satellite tracking system built in (see photo below, her system is similar) and therefore is always accurate, I like that but don’t see any value added in mounting a GPS system on satellite rig as my system is fixed! However, I would add GPS in any motorised system I would be considering because it can auto adjust azimuth and all the alignment necessary to track any satellite geosynchronous located above my area of Catalunya.
DISCLAIMER: The attached photo is a stock satellite antenna photo! It was substituted because my friend is apprehensive about her property being identified! She does not want anyone in any forum to recognise here ranch or home, therefore a stock photo is submitted in illustration to protect her privacy rights. That said! I can categorically state that her system is similar in size and construction!
However, I noticed a serious time 'lag and latency' as her rig tuned between satellites from the time it took her satellite rig to select a satellite in the South-East to one on the South-West, something I do not experience on my current Toroidal 90cm Satellites Antenna system in which any channel I select is instantly displayed even when moving between satellites of great distance between them? This is what sold me on Toroidal 90cm Satellites Antenna in the first place and it was an easy choice over the noise of a motored unit, the limited size (90cm) of the Toroidal 90cm Satellites Antenna however is a problem!
Regarding Siamesing a pair of Toroidal 90cm Satellites:
The idea of "Siamesing" two Toroidal 90cm Satellites Antennas with multiple LNB’s is not my original idea. The idea was a suggestion for the Toroidal T90cm Satellites Antenna manufacturer in China via the sales team at Alibaba Company in China to whom I directed a request for a larger version of the Toroidal 90cm Satellites Antenna.
(
http://www.alibaba.com/trade/search?fsb=y&IndexArea=product_en&CatId=&SearchText=Toroidal 90cm Satellites Antenna ).
I explained my problem to the Alibaba Company satellites sales technical team! They suggested that I use two (2) Toroidal T90cm Satellites Antenna back to back and facing polar opposites fit the LNB’s as necessary, South-East to South-West, or as necessary and that would resolve my problem.
The point is the Siamesing is an excellent solution but it does not overcome the dish size limitations pointed out here by more knowledgeable members to who’s expertise I must defer as they have been doing an excellent job of educating me about satellite technologies and are of great inspiration to me!
I thank you so very much for your salient information; I will keep you posted of what I learn.
Doctor Sarah