October 2011 - AMSAT-BB - mailman.amsat.org

AO-27/SO-50
by Richard Grabotin 25 Oct '11

25 Oct '11

I am new to satellites as of this weekend. I have worked AO-51 three times with much success. SO-50 I can hear off and on, but I am having trouble raising it. As for AO-27, I had a nice daytime direct overhead pass and heard nothing. I am using a yeasu g-5500 rotator with the AMSAT controller and ham radio deluxe. Kenwood ts-2000 for the rig and a 8 element 440 and a 4 element 2 meter antenna. The antennas are currently linear polarized since my phasing cables still have not arrived from the manufacturer. My questions are, is AO-27 difficult to work? Is it on a schedule? Any ideas why I could not raise or hear it? As for SO-50: Should I be listening 5khz down? Ham radio deluxe is controlling the radio frequencies and I made a custom entry for 5khz down and corrected for Doppler. This still did not seem to help. Richard K7LWV

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NDTV - Jugnu
by Trevor . 25 Oct '11

25 Oct '11

This story mentioned on RSGB News: IIT's loaf-sized satellite marks beginning of a new era in space technology http://www.ndtv.com/article/india/iits-loaf-sized-satellite-marks-beginning… 73 Trevor M5AKA

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Re: Question about Prospero downlink
by Trevor . 25 Oct '11

25 Oct '11

--- On Tue, 25/10/11, Raidel Abreu Espinet <cl2esp(a)frcuba.co.cu> wrote: > Just a little question. Is the Prospero downlink active > only after recieved command from ground station or it should be > active world wide? I would like to try recieve any signal but not > sure if it will be transmitting over Cuba and the Caribbean. Hi Raidel, I'm sure Roger will correct me if I'm wrong but my understanding is that the downlink will only be active within range of the United Kingdom so not receivable in Cuba. This is being done to avoid causing interference to other satellites using the band. --- On Tue, 25/10/11, PE0SAT <pe0sat(a)vgnet.nl> wrote: > "The v.h.f. system is conventional using twin transmitters, each with > an output of 350mW at approximately 136 MHz, and a twin tone > digital command system operating at about 148 MHz which handles > the 35 separate commands" Hi Jan, I read those words as saying: There are two transmitters onboard which are both capable of operating in the 136 MHz Band. The command receiver operates in the 148 MHz Band. A two audio tone system (I guess much like DTMF ?) is used by the ground station to send up to 35 different commands. 73 Trevor M5AKA

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Re: ARRISAT and a fun afternoon on AO51
by Burns Fisher 25 Oct '11

25 Oct '11

> > I have been trying to use ARRISAT-1 for the past couple of days. > Despite the fact it was almost directly overhead, I could not get my SSB > signal through the transponder. I am using an IC-910 and arrow beam. I > am fully aware of the antenna issue on the lady. Today I did not hear > anything from the satellite. Has anyone been working through the > satellite the past couple of day? Perhaps I have something wrong. The > same rig and antenna works fine with the other satellites. With AO51, I > run it at the minimum power which is probably about 5 watts. > > <AO51 stuff snipped> > 73, > -james > W5AOO I received the FM from ARISSAT-1 very strongly on Sunday in the vicinity of 2130Z in the northeast US (FN42). I tried to listen to the transponder and CW downlink but I did not hear anything. OTOH, I was in the middle of moving my shack so I did not have things fully setup. So if you are asking "is ARISSAT still running" the answer is surely yes, and strongly. If you are asking whether anyone has used the transponder recently, I can't answer that. Burns, W2BFJ

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Question about Prospero downlink
by Raidel Abreu Espinet 25 Oct '11

25 Oct '11

Hello all, Just a little question. Is the Prospero downlink active only after recieved command from ground station or it should be active world wide? I would like to try recieve any signal but not sure if it will be transmitting over Cuba and the Caribbean. Thanks, Raydel, CM2ESP ----------------------------------------------------------------------------------------------------------------------------------- Este mensaje ha sido enviado mediante el servicio de correo electronico que ofrece la Federacion de Radioaficionados de Cuba a sus miembros para respaldar el cumplimiento de los objetivos de la organizacion y su politica informativa. La persona que envia este correo asume el compromiso de usar el servicio a tales fines y cumplir con las regulaciones establecidas.

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BRAVO SERRIA
by wa4hfn＠comcast.net 25 Oct '11

25 Oct '11

People .If you dont have anything better to do than RE to the HOBBY GET a LIFE guys . IT IS A HOBBY And all this BRAVO SERRIA needs to stop. The BBS is not a sounding block,use this service for new grids and related info. Get over it guys and PLEASE dont RE to this posting show some good operating here too WA4HFN

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...on the way to San Jose Repeaters
by James Luhn 25 Oct '11

25 Oct '11

I know that there are several repeaters in San Jose. Is there anyone in particular that AMSAT members will be using during the Symposium? I am looking so forward to meeting everyone, especially those who have been so kind to help me get up and running on the satellites. 73 & 88, -james W5AOO

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10 meter yagi??
by Kevin Deane 25 Oct '11

25 Oct '11

If I suspended a few directors in front of a 10 meter dipole with a reflector of course, would that work? Kevin KF7MYK

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[Re: Prospero] Commanding Error
by Roger Duthie 25 Oct '11

25 Oct '11

We had a problem with our end and couldn't command during this pass. If you'd have heard something, I'd have been surprised. We did manage to command during the later pass at around 1850 BST, though it was a low pass and we're not sure if we picked anything up. - Rr. PS., Attempting passes today at (in BST = UTC + 1): 25 Oct <http://www.heavens-above.com/Gtrack.aspx?Session=kebgfdallkbipfnbnjhopgbh&s…> 7.5 15:21:10 10 SSE 15:27:34 47 E 15:34:58 10 NNE 25 Oct <http://www.heavens-above.com/Gtrack.aspx?Session=kebgfdallkbipfnbnjhopgbh&s…> 8.1 17:05:33 10 SW 17:12:07 47 WNW 17:19:43 10 N

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HO-68
by Ted 24 Oct '11

24 Oct '11

If memory serves, a couple of months ago, one of the principles posted that they were trying to fix something but that it was coming back. Time for an official update from the HO-68 folks K7TRK

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