---------- Forwarded message ---------- From: N. Mahdinejad <n.mahdine...@gmail.com> Date: Mon, Aug 8, 2011 at 7:07 PM Subject: Re: Fw: [amsat-bb] antenna rotator test To: i8cvs <domenico.i8...@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.i8...@tin.it> wrote: > > 73" de > > i8CVS Domenico > > ----- Original Message ----- > From: "i8cvs" <domenico.i8...@tin.it> > To: "N. Mahdinejad" <n.mahdine...@gmail.com> > Sent: Saturday, August 06, 2011 10:33 PM > Subject: Fw: [amsat-bb] antenna rotator test > > > > ----- Original Message ----- > > From: "i8cvs" <domenico.i8...@tin.it> > > To: "N. Mahdinejad" <n.mahdine...@gmail.com> > > Sent: Saturday, August 06, 2011 4:07 PM > > Subject: Re: [amsat-bb] antenna rotator test > > > > > > > Hi, N.Mahdinejad > > > > > > Please find here included the program NOISE.EXE by wich you can > calculate > > > 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.mahdine...@gmail.com> > > > To: "i8cvs" <domenico.i8...@tin.it> > > > Sent: Saturday, August 06, 2011 1:53 PM > > > Subject: Re: [amsat-bb] antenna rotator test > > > > > > > > > > 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 > > > > 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 > > > > 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.i8...@tin.it> wrote: > > > > > Hi, N.Mahdinejad > > > > > > > > > > The pointing of the antenna in wich you get the maximum Sun Noise > is > > the > > > > > real pointing of the antenna.Adjust the Azimuth and Elevation > reading > > as > > > per > > > > > 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 > > > could > > > > > i dentify the diffrence between the sun noise actual location and > the > > > > > location of antenna pointing? > > > > > thanks for your help and attention. > > > > > Best Regards. > > > > > > > > > > On Wed, Aug 3, 2011 at 2:44 PM, i8cvs <domenico.i8...@tin.it> > wrote: > > > > > > > > > > ----- Original Message ----- > > > > > From: "N. Mahdinejad" <n.mahdine...@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 > > > > > procedure > > > > > > of parabolic antenna controllers? > > > > > > > > > > > > Could you please send me some links or book names or papers > > those > > > > > > describe the procedure of testing pointing accuracy of for > e.g. > > 2 > > > or > > > > > 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. > > > > > > > > > > By the way the best procedure to test the point accuracy for a > 2 > > or > > > 3 > > > > > meter dish is to receive the Sun Noise at the frequency of > > > operation. > > > > > > > > > > Using any satellite traking program you can compute the azimuth > > and > > > > > elevation of the Sun for a particular time and then chek if you > > > receive > > > > > the strongest Sun Noise in the same azimut and elevation > indicated > > > by > > > > > the satellite traking program. > > > > > > > > > > If the maximum Sun Noise do not match with the pointing of your > > dish > > > > > than move mechanically the orientation of yor dish in order to > get > > > the > > > > > maximum Sun Noise at that specific time of dish pointing > > > adjustement. > > > > > > > > > > 73" de > > > > > > > > > > i8CVS Domenico > > > > > > > > > > > > > > > > > > > > > > > > > > _______________________________________________ Sent via AMSAT-BB@amsat.org. 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