[amsat-bb] Fwd: Fw: antenna rotator test

8 Aug 2011

      ---------- Forwarded message ----------
From: N. Mahdinejad n.mahdinejad@gmail.com
Date: Mon, Aug 8, 2011 at 7:07 PM
Subject: Re: Fw: [amsat-bb] antenna rotator test
To: i8cvs domenico.i8cvs@tin.it
Dear Domenico.
there is something not clear for me.
could you please tell me step by step what should i do for antenna pointin
accuracy test with sun noise?
I know that
1. predict the azimyth and elevation of sun versus time  due to my
groundstation  latitude and longitude.
2. point the antennna to that az and el
3. set the ferequency of my reciver to the sun noise ferequency. for e.g
because my antenna is in s band i shoul set the receiver to 2304 MHz. and
also my receiver must be s band reciver..
4. now i should  move the antenna +-5 degree in both az and el direction to
hear maximum niose.
5. where the maximum niose is the right angel and the diffrence between
stage 2 angles with these angles is pointing accuracy.
is there steps true?
Im lloking forward to hearinh from you.
 any help would be gratefully appreciated.
Best Regards.
N.Mahdinejad.
On Mon, Aug 8, 2011 at 12:42 AM, i8cvs domenico.i8cvs@tin.it wrote:
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73" de
i8CVS Domenico
----- Original Message -----
From: "i8cvs" domenico.i8cvs@tin.it
To: "N. Mahdinejad" n.mahdinejad@gmail.com
 Sent: Saturday, August 06, 2011 10:33 PM
Subject: Fw: [amsat-bb] antenna rotator test
...
----- Original Message -----
From: "i8cvs" domenico.i8cvs@tin.it
To: "N. Mahdinejad" n.mahdinejad@gmail.com
Sent: Saturday, August 06, 2011 4:07 PM
Subject: Re: [amsat-bb] antenna rotator test
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Hi, N.Mahdinejad
Please find here included the program NOISE.EXE by wich you can
calculate
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how much Sun Noise you can receive from the Sun at about 2.5 GHz
To get the daily WWV Solar Flux in sfu (Solar Flux Units) go to the
following internet page.
http://www.swpc.noaa.gov/ftpdir/indices/DSD.txt
Also read and study the article Estimating Sun Noise at Various
Frequencies
...
by
WR0I
73" de
i8CVS Domenico
----- Original Message -----
From: "N. Mahdinejad" n.mahdinejad@gmail.com
To: "i8cvs" domenico.i8cvs@tin.it
Sent: Saturday, August 06, 2011 1:53 PM
Subject: Re: [amsat-bb] antenna rotator test
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Dear Mr Domenico and Mr Brain
Thanks for your attention.
 My research ferequency is about 2.5 GHz,how I can get the maximum
sun noise? I mean that how I know that the sun noise now is maximum.
I
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think that I dont have clear meaninig of sun noise and how to measure
it. but I have tracking program that show the position of sun and
also
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azimuth and elevation of sun reaching in my ground station in
different time.
Im looking forward to hearing from you.
Best Regards.
On 8/4/11, i8cvs domenico.i8cvs@tin.it wrote:
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Hi, N.Mahdinejad
The pointing of the antenna in wich you get the maximum Sun Noise
is
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the
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real pointing of the antenna.Adjust the Azimuth and Elevation
reading
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as
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per
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the indication of your tracking program for the Sun.
73" de
i8CVS Domenico
  ----- Original Message -----
  From: N. Mahdinejad
  To: i8cvs
  Sent: Wednesday, August 03, 2011 2:40 PM
  Subject: Re: [amsat-bb] antenna rotator test
Dear Domenico
  THANKS FOR YOUR ANSWER.
  I have some question.
  in this case how i calculate the pointing accuracy? i mean that
how
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could
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i dentify the diffrence between the sun noise actual location and
the
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location of antenna pointing?
  thanks for your help and attention.
  Best Regards.
On Wed, Aug 3, 2011 at 2:44 PM, i8cvs domenico.i8cvs@tin.it
wrote:
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----- Original Message -----
From: "N. Mahdinejad" <n.mahdinejad@gmail.com>
To: <amsat-bb@amsat.org>
Sent: Tuesday, August 02, 2011 2:51 PM
Subject: [amsat-bb] antenna rotator test

> DAER AMSAT members.
>
> Is there anyone who has information about pointing accuracy

test
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procedure
    > of parabolic antenna controllers?
    >
    >  Could you please send me some links or book names or papers
those
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> describe the procedure of testing pointing accuracy of  for

e.g.
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2
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or
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3 m
    > antenna controllers.
    >
    > Any help would be gratefully appreciated.
    >
    > Best Regards.
    >
    > N.Mahdinejad
> _______________________________________________

Hi, N.Mahdinejad

You don't mention the frequency used for your 2 or 3 meter

dish.
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By the way the best procedure to test the point accuracy for a

2
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or
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3
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meter dish is to receive the Sun Noise at the frequency of

operation.
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Using any satellite traking program you can compute the azimuth

and
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elevation of the Sun for a particular time and then chek if you

receive
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the strongest Sun Noise in the same azimut and elevation

indicated
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by
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the satellite traking program.

If the maximum Sun Noise do not match with the pointing of your

dish
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than move mechanically the orientation of yor dish in order to

get
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the
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maximum Sun Noise at that specific time of dish pointing

adjustement.
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...
73" de

i8CVS Domenico