Richard,
I believe the schedule may be flipping back to SSB this evening. I am in FN20un and usually the passes around 14:00 and 16:00 UTC are valid for this area in NJ. The first of the two passes above often may even have European stations on.
Http://www.camsat.cn I believe is the website for times on and off.
Hope this helps and see you on HO-68.
Sent from my iPhone
Does anyone know the polarization of the 2.4 GHz transmissions from AO-51. Are they circular? If so which polarity, RHCP or LHCP? Are they linear? If so is there a preferred receiving polarization? I have examined the AMSAT web site and many references on the Internet, but cannot seem to find the answer.
Thanks,
John WA4WDL AMSAT member 10211
Hi John!
Does anyone know the polarization of the 2.4 GHz transmissions from AO-51. Are they circular? If so which polarity, RHCP or LHCP? Are they linear? If so is there a preferred receiving polarization? I have examined the AMSAT web site and many references on the Internet, but cannot seem to find the answer.
It's linear. Page 7 in the PDF at:
http://www.amsat.org/amsat-new/echo/OSCAR-E_Status_Report_5.pdf
has a brief description and a picture of the L/S antenna on AO-51.
73!
Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/
On 12/21/2010 2:56 PM, jmfranke wrote:
Does anyone know the polarization of the 2.4 GHz transmissions from AO-51. Are they circular? If so which polarity, RHCP or LHCP? Are they linear? If so is there a preferred receiving polarization? I have examined the AMSAT web site and many references on the Internet, but cannot seem to find the answer.
Thanks,
John WA4WDL AMSAT member 10211
435.300 is RHCP 435.150 is LHCP VHF, L, and S are linear
73, Drew KO4MA
John,
It is linear. You are right that the information exists, but is sometimes not readily available. A good place to look is the Weekly Satellite Report which AMSAT distributes. For many, but not all satellites, that information is just below the frequency information. For AO-51 we find:
Mode and Antenna Polarization:
V: Linear U: TX A (usually digital)LHCP TX B (usually analog) RHCP L: Linear S: Linear
Alan WA4SCA
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of jmfranke Sent: Tuesday, December 21, 2010 1:57 PM To: amsat-bb@amsat.org Subject: [amsat-bb] AO-51 S-Band antenna polarization
Does anyone know the polarization of the 2.4 GHz transmissions from AO-51. Are they circular? If so which polarity, RHCP or LHCP? Are they linear? If so is there a preferred receiving polarization? I have examined the AMSAT web site and many references on the Internet, but cannot seem to find the answer.
Thanks,
John WA4WDL AMSAT member 10211
_______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Many thanks to all who responded. The additional references were great!
Thanks to all,
John WA4WDL
-------------------------------------------------- From: "Alan P. Biddle" APBIDDLE@UNITED.NET Sent: Tuesday, December 21, 2010 3:10 PM To: "'jmfranke'" jmfranke@cox.net; amsat-bb@amsat.org Subject: RE: [amsat-bb] AO-51 S-Band antenna polarization
John,
It is linear. You are right that the information exists, but is sometimes not readily available. A good place to look is the Weekly Satellite Report which AMSAT distributes. For many, but not all satellites, that information is just below the frequency information. For AO-51 we find:
Mode and Antenna Polarization:
V: Linear U: TX A (usually digital)LHCP TX B (usually analog) RHCP L: Linear S: Linear
Alan WA4SCA
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of jmfranke Sent: Tuesday, December 21, 2010 1:57 PM To: amsat-bb@amsat.org Subject: [amsat-bb] AO-51 S-Band antenna polarization
Does anyone know the polarization of the 2.4 GHz transmissions from AO-51. Are they circular? If so which polarity, RHCP or LHCP? Are they linear? If so is there a preferred receiving polarization? I have examined the AMSAT web site and many references on the Internet, but cannot seem to find the answer.
Thanks,
John WA4WDL AMSAT member 10211
Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Timely info, as I am going to rebuild my directional satellite array this week using: 144: M2 2M7 12.4-dBi (vert-pol) 432: M2 436CP24 14-dBic (est.) RHCP (rear half of 436CP42) 2401: L-com Patch 8-dBic RHCP No L-band http://www.kl7uw.com/MODSATTWR.jpg
I may add pol switch to the 432 x-yagi later on.
This is my minimized array to lower wind resistance and get a tracking array back up in mid-winter. I can consider restoring the fully antenna array next summer when able to lower the tower on hinge-over base using my pickup truck.
At 11:10 AM 12/21/2010, Alan P. Biddle wrote:
John,
It is linear. You are right that the information exists, but is sometimes not readily available. A good place to look is the Weekly Satellite Report which AMSAT distributes. For many, but not all satellites, that information is just below the frequency information. For AO-51 we find:
Mode and Antenna Polarization:
V: Linear U: TX A (usually digital)LHCP TX B (usually analog) RHCP L: Linear S: Linear
Alan WA4SCA
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of jmfranke Sent: Tuesday, December 21, 2010 1:57 PM To: amsat-bb@amsat.org Subject: [amsat-bb] AO-51 S-Band antenna polarization
Does anyone know the polarization of the 2.4 GHz transmissions from AO-51. Are they circular? If so which polarity, RHCP or LHCP? Are they linear? If so is there a preferred receiving polarization? I have examined the AMSAT web site and many references on the Internet, but cannot seem to find the answer.
Thanks,
John WA4WDL AMSAT member 10211
Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
73, Ed - KL7UW, WD2XSH/45 ====================================== BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 144-1.4kw*, 432-100w*, 1296-testing*, 3400-winter? DUBUS Magazine USA Rep dubususa@hotmail.com ====================================== *temp not in service
Hi John,
Both the S-band and L-band antennas are linear.
http://bach.as.arizona.edu/gallery/main.php?g2_itemId=8340&g2_page=3
and
http://bach.as.arizona.edu/gallery/main.php?g2_itemId=8550
73!
Mark N8MH
At 02:56 PM 12/21/2010 -0500, jmfranke wrote:
Does anyone know the polarization of the 2.4 GHz transmissions from AO-51. Are they circular? If so which polarity, RHCP or LHCP? Are they linear? If so is there a preferred receiving polarization? I have examined the AMSAT web site and many references on the Internet, but cannot seem to find the answer.
Thanks,
John WA4WDL AMSAT member 10211
Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Mark L. Hammond [N8MH]
jmfranke wrote:
Does anyone know the polarization of the 2.4 GHz transmissions from AO-51. Are they circular? If so which polarity, RHCP or LHCP? Are they linear?
Last Sunday I tried to receive the 2.4GHz downlink with a linear polarized wifi patch and signals seem to be linear polarized. I was all the pass rotating the antenna to get the better signal. Most of time signal was almost horizontally polarized.
73 de EA4EOZ
Hi John, WA4WDL
On the 2.4 GHz from AO-51 the transmitting polarization is Linear so that in theory for receiving 2.4 GHz RHCP or LHCP on the ground station don't make difference.
AO-51 Mode and Antenna Polarization:
T: Linear V: Linear U: TX A (usually digital)LHCP TX B (usually analog) RHCP L: Linear S: Linear
73" de
i8CVS Domenico
----- Original Message ----- From: "jmfranke" jmfranke@cox.net To: amsat-bb@amsat.org Sent: Tuesday, December 21, 2010 8:56 PM Subject: [amsat-bb] AO-51 S-Band antenna polarization
Does anyone know the polarization of the 2.4 GHz transmissions from AO-51. Are they circular? If so which polarity, RHCP or LHCP? Are they linear? If so is there a preferred receiving polarization? I have examined the AMSAT web site and many references on the Internet, but cannot seem to
find
the answer.
Thanks,
John WA4WDL AMSAT member 10211
Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
John,
From the information of the time I researched it soon after AO-51 was
launched, I recall it was linear but polarity was pointing angle dependent. I used a patch LH rotation feed on a 20" MDS dish with great results using a KG5NA down converter. Being circular there was one less variable to contend with during the short duration passes of AO-51. The gain of the dish with the low noise figure of the down converter more than made up for the 3 dB loss from linear to circular.
Art, KC6UQH
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of jmfranke Sent: Tuesday, December 21, 2010 11:57 AM To: amsat-bb@amsat.org Subject: [amsat-bb] AO-51 S-Band antenna polarization
Does anyone know the polarization of the 2.4 GHz transmissions from AO-51. Are they circular? If so which polarity, RHCP or LHCP? Are they linear? If so is there a preferred receiving polarization? I have examined the AMSAT web site and many references on the Internet, but cannot seem to find the answer.
Thanks,
John WA4WDL AMSAT member 10211
_______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
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participants (10)
-
Alan P. Biddle -
Andrew Glasbrenner -
Art McBride -
Edward R. Cole -
i8cvs -
jmfranke -
Mark L. Hammond -
Miguel A. Vallejo -
Patrick E. Farcon -
Patrick STODDARD (WD9EWK/VA7EWK)