Not worth much salt then me thinks.
@brin251 Hi mate, now please believe me any clown (and I'm in no way saying your friend is) can put up a dish using one satellite, that part is easy. The skill is in setting up the dish/motor so that it tracks the arc correctly and this is why I pay an installer to do mine (I don't like heights either).
Now if your in the UK your most likely satellite for reference is Thor BUT if your over in the west or Ireland it may not be.
Now let me explain why and I will keep it simple, if wherever you live you stood facing the equator then from the northern hemisphere you will be facing south, from the southern hemisphere you will be facing north.
All satellites are at the same height from the equator so lets assume your Longitude is 0 degrees (mine practically is I'm 0.2 west of 0).
Ok your facing south and at 0 degrees if you looked up and could see the Clark belt* then the "highest satellite" would be Thor, but hold on I hear you say you just said all satellites are at the same height now you say Thor is higher!!
YES I did say their all at the same height FROM THE EQUATOR
and the Earth is round so the further east or west you look the lower down on the horizon the satellites would appear BUT only from your point of view.
From the point of view of someone standing say at 5 east then Sirius 5E would be the reference as from their location that one is the highest.
Now the reason we use the "highest" satellite from our/your location is it will allow the greatest symmetrical swing east or west and therefore the greatest number of satellites to be received.
If the motor/dish installation is not done correctly it can severely limit the number or satellites receivable.
*Clark belt, named after that great science fiction writer Arthur C Clark who in 1945 in Wireless World gave the necessary information for stationary satellite orbits and hence gave us satellite TV.
Sorry if this is a bit over the top.