SSTV Pictire Successful via ARISSat-1/RadioSKAF-V TRANSPONDER
On November 12, 2011 at 1908 Z my son Jeff, KB8VCO and I were successful in transmitting a picture and receiving back an image via the ARISSat-1/RADIOSKAF-V transponder.
Separate MMSSTV software setups on 2 computers with mode Robot 36 were used to Tx 435.750 LSB up and Rx 145.930 MHz down. It was a challenge, over several days of trying , to find the satellite in a favorable position with its (inadvertently) shortened antenna. Doppler along with Tx and Rx antennas were manually controlled.
A picture of the original (my auto license plate) and the received picture from the satellite has been submitted to the ARISS SSTV Gallery.
It is hoped others will try a similar experiment via the transponder and perhaps pictures could be exchanged. It is noted that Henk, PA3GUO also sent and received an SSTV picture as may be seen in the Gallery.
Respectively submitted, with much thanks to Lou McFadin, W5DID, ARISS Hardware Engineering Manager and his team along with Sergej Samburov, RV3DR, Chief of Cosmonaut Amateur Radio Department for his engineering and testing contributions in Korolev, Russia. A very exciting and challenging satellite for Amateur Radio has been provided. Launch was August 5, 2011 but Re-entry according to recent reports may occur within the next few months.
Farrell Winder, W8ZCF
Cincinnati, Ohio
Hi Farrell,
great post and congratulations. I am currently having fun with the 1000BPSK telemetry. Next experinment will be a QSO through the transponder. Its good to have a satellite that presents a few challenges.
I echo your thanks to the entire ARISSat team.
73 John G7HIA
________________________________ From: Farrell Winder fwinder@fuse.net To: AMSAT AMSAT-BB@AMSAT.Org Sent: Sunday, 20 November, 2011 13:56:45 Subject: [amsat-bb] SSTV Pictire Successful via ARISSat-1/RadioSKAF-V TRANSPONDER
On November 12, 2011 at 1908 Z my son Jeff, KB8VCO and I were successful in transmitting a picture and receiving back an image via the ARISSat-1/RADIOSKAF-V transponder.
Separate MMSSTV software setups on 2 computers with mode Robot 36 were used to Tx 435.750 LSB up and Rx 145.930 MHz down. It was a challenge, over several days of trying , to find the satellite in a favorable position with its (inadvertently) shortened antenna. Doppler along with Tx and Rx antennas were manually controlled.
A picture of the original (my auto license plate) and the received picture from the satellite has been submitted to the ARISS SSTV Gallery.
It is hoped others will try a similar experiment via the transponder and perhaps pictures could be exchanged. It is noted that Henk, PA3GUO also sent and received an SSTV picture as may be seen in the Gallery.
Respectively submitted, with much thanks to Lou McFadin, W5DID, ARISS Hardware Engineering Manager and his team along with Sergej Samburov, RV3DR, Chief of Cosmonaut Amateur Radio Department for his engineering and testing contributions in Korolev, Russia. A very exciting and challenging satellite for Amateur Radio has been provided. Launch was August 5, 2011 but Re-entry according to recent reports may occur within the next few months.
Farrell Winder, W8ZCF
Cincinnati, Ohio _______________________________________________ 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
Jeff, KB8VCO and I were successful in transmitting a picture and receiving back an image via the ARISSat-1/RADIOSKAF-V transponder.
By the way, once I got MMSTV loaded I decided to just park it on 14.230 MHz all day long and watch the SSTV images come rolling in. I have been watching them in my office (when I walk by that PC) and although hear SSTV all day long, and some signals very strong..... I must admit, only ONE in 2 weeks has been discernable as to what the picture actually is..
ALl the rest you can tell MAYBE that it is some kind of picutre with maybe some text at the top and the bottom, but NONE of them have been readable. Yet, the signals sound like they would make a Q5 599 SSB signal. Is it just me, or does HF multipath slur the imgaes beyone all recognition.?
Bob, WB4APR
Bob,
It is just you. ;) Seriously, I do the same thing, and 3 out of 4 are good pictures, perhaps 1 in 5 outstanding. I do use Ham Radio Deluxe, which has a few nice tricks such as automatic slant correction. A suggestion is to calibrate the sound card clock. Many are significantly off. Not certain about MMSTV, but HRD has that built in. Also, check the audio level to make certain it is correct.
73s,
Alan WA4SCA
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Bob Bruninga Sent: Sunday, November 20, 2011 4:48 PM To: Farrell Winder; AMSAT Subject: [amsat-bb] Re: SSTV Pictire Successful via ARISSat-1/RadioSKAF-V TRANSPONDER
Jeff, KB8VCO and I were successful in transmitting a picture and receiving back an image via the ARISSat-1/RADIOSKAF-V transponder.
By the way, once I got MMSTV loaded I decided to just park it on 14.230 MHz all day long and watch the SSTV images come rolling in. I have been watching them in my office (when I walk by that PC) and although hear SSTV all day long, and some signals very strong..... I must admit, only ONE in 2 weeks has been discernable as to what the picture actually is..
ALl the rest you can tell MAYBE that it is some kind of picutre with maybe some text at the top and the bottom, but NONE of them have been readable. Yet, the signals sound like they would make a Q5 599 SSB signal. Is it just me, or does HF multipath slur the imgaes beyone all recognition.?
Bob, WB4APR _______________________________________________ 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
Hi Bob,
I also have put MMSSTV on 14.230 and most of the images look great with a handful that are terrific. I am not using anything fancy just a 15' whip and an FT-847.
Maybe the noise level is really high there?
73, Tony AA2TX ---
On 11/20/2011 7:23 PM, Alan P. Biddle wrote:
Bob,
It is just you. ;) Seriously, I do the same thing, and 3 out of 4 are good pictures, perhaps 1 in 5 outstanding. I do use Ham Radio Deluxe, which has a few nice tricks such as automatic slant correction. A suggestion is to calibrate the sound card clock. Many are significantly off. Not certain about MMSTV, but HRD has that built in. Also, check the audio level to make certain it is correct.
73s,
Alan WA4SCA
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Bob Bruninga Sent: Sunday, November 20, 2011 4:48 PM To: Farrell Winder; AMSAT Subject: [amsat-bb] Re: SSTV Pictire Successful via ARISSat-1/RadioSKAF-V TRANSPONDER
Jeff, KB8VCO and I were successful in transmitting a picture and receiving back an image via the ARISSat-1/RADIOSKAF-V transponder.
By the way, once I got MMSTV loaded I decided to just park it on 14.230 MHz all day long and watch the SSTV images come rolling in. I have been watching them in my office (when I walk by that PC) and although hear SSTV all day long, and some signals very strong..... I must admit, only ONE in 2 weeks has been discernable as to what the picture actually is..
ALl the rest you can tell MAYBE that it is some kind of picutre with maybe some text at the top and the bottom, but NONE of them have been readable. Yet, the signals sound like they would make a Q5 599 SSB signal. Is it just me, or does HF multipath slur the imgaes beyone all recognition.?
Bob, WB4APR _______________________________________________ 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
On Sun, 20 Nov 2011 17:47:40 -0500 (EST) "Bob Bruninga " bruninga@usna.edu wrote:
ALl the rest you can tell MAYBE that it is some kind of picutre with maybe some text at the top and the bottom, but NONE of them have been readable. Yet, the signals sound like they would make a Q5 599 SSB signal. Is it just me, or does HF multipath slur the imgaes beyone all recognition.?
It's just you ;-)
Check the slant correction, or click on the "smiley face" symbol.
It's not a sync problem. All the images are properly framed. Just not good images even though the signal strength sounds Q5 to me.. Just enough noise in all of them to be not worth looking at. Ill keep watching... Bob, WB4APR
ALl the rest you can tell MAYBE that it is some kind of picutre with maybe some text at the top and the bottom, but NONE of them have been readable. Yet, the signals sound like they would make a Q5 599 SSB signal. Is it just me, or does HF multipath slur the imgaes beyone all recognition.?
It's just you ;-) Check the slant correction, or click on the "smiley face" symbol.
On Mon, 21 Nov 2011 17:36:14 -0500 "Bob Bruninga" bruninga@usna.edu wrote:
It's not a sync problem. All the images are properly framed. Just not good images even though the signal strength sounds Q5 to me.. Just enough noise in all of them to be not worth looking at. Ill keep watching... Bob, WB4APR
So it's squared up okay, but the signal is excessively noisy? What are the levels looking like? There's a waterfall display and level bargraph which should be in the upper quarter but not actually flashing red.
You may have some strange grounding problem or similar, coupling noise into your recovered audio.
participants (6)
-
Alan P. Biddle -
Anthony Monteiro -
Bob Bruninga -
Farrell Winder -
Gordon JC Pearce -
John Heath