Subj : Kerosene Engines
To   : Charles Radley
From : Andrey Kanunnikov
Date : Fri Jul 21 2000 05:28 pm

Hello, Charles!

Friday July 21 2000 06:24, Charles Radley wrote to Andrey Kanunnikov:

 CR> We know in advance the angle betwen Canopus and the Sun, it is always
 CR> approximately 90 degrees (slightly less).
 CR> The spacecraft rotates about the Sun axis until a bright star appears
 CR> in the field of view.   There is only one bright star approximately
 CR> 90
 CR> degrees to the Sun, so we know that it is Canopus.
I'am really surprised of it! I didn't suppose such solution of problem. This 
method is a result of work a sharp intellect.

 AK>> This scheme of control is well when the space shuttle is
 AK>> operated simultaneously. But what will happend if the
               continuosly (or continuolly - i don't remember this word clear. 
I mean that the control proceeds all the time without any breakes)

 AK>> trajectory changed unexpected?
 AK>> Time delay between signal transmitted to the Earth and recieved
 AK>> is to long.
 CR> Andrey, the method I described was not for the Space Shuttle, it was
 CR> for interplanetary craft.
I'am sorry. My english isn't well enough. I meant interplanetary crafts.

 CR> The Space Shuttle uses on board inertial navigation methods, a closed
 CR> loop feedback control system, using multiple real-time computers.
Yes, i know about it a little. There are uses different hyroscopes, systems of 
orientation control etc.

 CR> There is no human involved, except to program the computers prior to
 CR> the launch.
There are special programs checked many times and made specially for the 
onboard equipment. But it's hard for me to imagine what could be if there was a 
Microsoft Windows 98 for example ;-)

 CR> Take care,
I will ;-)

 CR> Charles R.
Andrey K.

                        Thank you for keeping the discussion with me.
                      I'am _really_ will glad to see you in the future. Andrey.

ÄÄÄ To drink or not to drink...?
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 * Origin: Who tasted tear of poppy that cry whole life... (2:5022/115.47)

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