beam me up scotty

[colubridae]

I am unsure about 'beaming'.

If I understand correctly the idea is to reduce your relative speed to the aircraft that has you locked.

When this is achieved the aircraft/missile radar will now ignore your radar return as 'it considers you ground clutter'.

 

Can I ask what the 'exact' processing is?

 

my understanding is as follows:-

1 If the enemy is heading directly toward me the radar return he receives will have a doppler shift equivalent only to his true speed, if I have him at my 3/6 position.

 

2 If the enemy is heading directly toward me the radar return he receives will have a doppler shift equivalent to his true speed minus my true speed, if I have him at my 6 position.

This may well be very low, zero or 'negative doppler' if my speed is greater than his.

 

3 Do the radars distinguish between 'positive' and 'negative' doppler?

 

4 If the enemy is heading directly toward me the radar return he receives will have a doppler shift equivalent to his true speed plus my true speed if I have him at my 12 position.

 

5 Any positions not on the cardinal 3/6/9/12, will produce a relative speed (and hence a relative doppler shift) which is his true speed times the sine of the angle of 'position' in which he appears to me.

 

6 Any positions not on the cardinal 3/6/9/12, will require modified beaming. The arithmetic to provide a zero doppler now being quite complicated.

 

7 3/6 beaming will only produce zero/low doppler for a brief period. Quite soon a relative speed will develop and require speed/heading changes to again reduce the relative speed.

 

8 Does the tracking radar take into account its own speed when considering if the target is 'doppler' shifted. I.e. if my radar return has a zero doppler shift then I am moving at the same speed as him, if heading in the same direction. Does this means I am not 'background clutter'?

 

9 Does the tracking radar take into account its own speed when considering if backgorund clutter is 'doppler' shifted. I.e. 'ground clutter' returns should have doppler shifts depending on thier bearing from the locking aircraft. (doppler shifted by true speed at 12 position, zero doppler shift at 3/9 position etc.)

 

10 Why can I never type the word doppler without having to go back and change it from dopller?

 

 

please help

losing sleep

[GGTharos]

Lets make this simple ... you are in the notch when:

 

You are lower that the 'attacking' radar and perpendicular to the radar source.

 

In other words, your closure to the attacker is approximately equal to the attacker's Ground Speed.

 

The arithmetic for this is rather easy ;)

The notch tends to be about 70-80nm wide or so.

[suntrace1]

Piccard never, not once, said in Star Trek: ''Beam me up, Scooty.''

[Force_Feedback]

Piccard never, not once, said in Star Trek: ''Beam me up, Scooty.''

 

Duuh, scotty was long retired by then :/

[suntrace1]

Well, it wasn't said EVER in Start Trek. But yeah, it was Capt. Kirk back then.