Date   

Re: AO-92 to Camera Mode

 

This is a digital signal and not the same as SSTV that can just be done over a regular, FM receiver. The signal is sent over FM, but it utilizes the full audio spectrum including frequencies below 200 Hz that are often filtered out of the audio. You likely will be missing some of the signal if you try to capture it over a standard FM receiver. Your best bet is to use some kind of SDR. I've used the cheap RTL SDR dongles that can be purchased from Amazon for about $20 with great success. You can use a regular computer or an Android device with appropriate USB On-The-Go cable adapter to connect to the SDR. iPhone can't be use because iOS does not allow sufficient access to the USB hardware to use such a device.

To decode the pictures and upload them, you will need to set up the free Foxtelem program from AMSAT. You can either record the data with your SDR and software like SDR Sharp or SDRTouch during the pass and play back later or live stream the unfiltered audio out to Foxtelem during the pass.

Note, AO-91 and AO-92 both are always transmitting a low-bitrate DUV signal using this same technique along with the regular FM audio so you can test this out during any pass. What's unique tomorrow is that they are turning on the camera and sending high-resolution pictures down using the full audio channel for data instead of voice. The low-bitrate Digital-Under-Voice signal only sends back lower-resolution sensor telemetry, but it's still fun to pick up.

-Loren
K7IW


On Mon, Apr 27, 2020 at 6:45 AM Brad Smith via groups.io <corlissbs=aol.com@groups.io> wrote:
I guess I am a little confused. Can one receive the pics with an iPhone and a radio, like the SSTV images from the ROISS, or does one need a permanent station with a computer? 

Brad KC9UQR

Sent from Brad’s iPad

On Apr 26, 2020, at 12:15 PM, Clint Bradford via groups.io <clintbradford=mac.com@groups.io> wrote:

From AMSAT-NA ...

The command team has had a few requests for camera mode on AO-92 over the
last few weeks, and it's been a while, so let's take some pictures next
week.


Next Tuesday morning, April 28th, we'll attempt to command the camera on at
approximately 1440Z and 1612Z. We'll also try the 1750Z pass. If we can't
command on the 1750Z pass, we'll find a suitable pass later in the week for
the west coast.



Take a look at
https://www.amsat.org/foxtelem-software-for-windows-mac-linux/ for a guide
on how to set up FoxTelem, and https://www.amsat.org/tlm/showImages.php?id=4
for near-live images as we go. Remember, the more stations submitting
telemetry during the event, the better the chance of complete images!



73, Drew KO4MA
AMSAT VP Operations


Re: AO-92 to Camera Mode

Clint Bradford
 

From https://www.amsat.org/foxtelem-software-for-windows-mac-linux/  ---

Fox-1 satellites include two telemetry formats:

  • Slow Speed, also called Data Under Voice (DUV) is 200 bps FSK data sent at the same time as the transponder audio. Whenever the transmitter is on, data is being sent. This happens during beacons and during live QSOs.
  • High Speed is 9600 bps FSK sent instead of the transponder. This is used for data intensive experiments such as the Virginia Tech Camera and the University of Iowa HERCI experiment. This is only active when commanded from the ground. You can recognize High Speed because it sounds like an old school computer modem.
  • FoxTelem will receive and store both formats assuming you can feed it audio that does not have the frequencies below 200 Hz filtered.  For High Speed, the audio must also extend to include the full 9600bps bandwidth of the FM signal.  For both modes this is best achieved from a Software Defined Radio or from the 9600 bps packet port of some radios.  See the user guide for more details.


Re: AO-92 to Camera Mode

Robert Switzer
 

That link doesn't really say how to set up for Image mode...  can I assume slow speed DUV mode?


Re: AO-92 to Camera Mode

Brad Smith
 

I guess I am a little confused. Can one receive the pics with an iPhone and a radio, like the SSTV images from the ROISS, or does one need a permanent station with a computer? 

Brad KC9UQR

Sent from Brad’s iPad

On Apr 26, 2020, at 12:15 PM, Clint Bradford via groups.io <clintbradford@...> wrote:

From AMSAT-NA ...

The command team has had a few requests for camera mode on AO-92 over the
last few weeks, and it's been a while, so let's take some pictures next
week.


Next Tuesday morning, April 28th, we'll attempt to command the camera on at
approximately 1440Z and 1612Z. We'll also try the 1750Z pass. If we can't
command on the 1750Z pass, we'll find a suitable pass later in the week for
the west coast.



Take a look at
https://www.amsat.org/foxtelem-software-for-windows-mac-linux/ for a guide
on how to set up FoxTelem, and https://www.amsat.org/tlm/showImages.php?id=4
for near-live images as we go. Remember, the more stations submitting
telemetry during the event, the better the chance of complete images!



73, Drew KO4MA
AMSAT VP Operations


locked Re: Ailunce HS2

Mike Hoblinski
 

I think they have a Facebook page where you might be able to ask .  Yes their are
way too many questions about it and it has not even gone on sale. Like whats inside,
what OS is it running, would it be open source. One of the videos did show Ham Radio
Deluxe controlling it. If the radio runs on Linux could their be apps developed like 
satellite tracking and doppler tuning. A radio like this when out usually ends up with
software bugs and many limitations. And as you try to try to upgrade hardware capabilities
you are probably better of buying the Yaesu portable cost wise. Right now its mostly
a mystery box with a display and buttons. 

Mike
N6IMF


AO-92 to Camera Mode

Clint Bradford
 

From AMSAT-NA ...

The command team has had a few requests for camera mode on AO-92 over the
last few weeks, and it's been a while, so let's take some pictures next
week.


Next Tuesday morning, April 28th, we'll attempt to command the camera on at
approximately 1440Z and 1612Z. We'll also try the 1750Z pass. If we can't
command on the 1750Z pass, we'll find a suitable pass later in the week for
the west coast.



Take a look at
https://www.amsat.org/foxtelem-software-for-windows-mac-linux/ for a guide
on how to set up FoxTelem, and https://www.amsat.org/tlm/showImages.php?id=4
for near-live images as we go. Remember, the more stations submitting
telemetry during the event, the better the chance of complete images!



73, Drew KO4MA
AMSAT VP Operations


locked Re: Ailunce HS2

Dave Mohesky
 

No fcc number ?

Dave.KB0RFS


locked Ailunce HS2

Mike Hoblinski
 

I ran across the Ailuance HS2 Ham-Box portable SDR radio today and thought it might be of interest to this group.
Its capable of HF Vhf-UHF SSB. It appears to be new and in its early stages and looks like price is about 460 to
499. It dose not appear to be out yet but their are some videos on it. Here is a link to the radio.

https://www.ailunce.com/blog/hs2-sdr-hf-vhf-uhf-sdr-sdr-transceiver

Mike
N6IMF


ISS Packet

Clint Bradford
 

Amateur radios on the ISS are scheduled to be turned off at 18:30 UTC Friday - as Supply mission Progress heads towards the ISS. If all goes well, expect packet back on at  14:00 UTC Saturday, April 25. 


Re: SO-50 Success and Fail

Clint Bradford
 

Great work! And SO-50 is a little, well, more "finicky" to work than AO-91 or '92!

Clint


SO-50 Success and Fail

K9DWI
 

SUCCESS - Updated my radio and I was able to make my first three satellite contacts on SO-50

FAIL - I thought my GoPro was recording a video, instead it took one lousy picture.  Operator error, lesson learned.

I don't remember the call signs of the station I talked with, figured I would get that from my video.  I was hoping one of you just talked with K9DWI on SO50 or logged our QSO on QRZ.


Re: Recoding qsos

Kevin Kimbro
 

I use a telephone pickup in one ear under my headset hooked to my digital recorder. I don’t use an interface with the radio. It Gets both Uplink and downlink recordings saved on the recorder. 

Kevin Kimbro
NG4P@...



Re: AO-91 signal?

Hank Tyler
 

Some programs let the user see the past ... But I think it might have been that other 
project's signal you heard.

Clint


>> Clint I don't know as the passes are over. Is there a way to model the passes in the past?


AO-91 signal?

Hank Tyler
 

Was this satellite also above you? http://www.maxvaliersat.it/amateurradio

-CLint



>> I tried following AO-91 a short time ago and this is the signal I saw on my waterfall. It's obviously not a voice signal. What is it and what is it's mode?



Thanks!

Hank/ke0cu


Re: I have to be doing something wrong

Richard Silva <rcksil@...>
 

I also have one ,V71a,in the garage on shelf. I might give this a shot. I plan on setting up two HT’s and monitor that way. I was thinking the duplexes might be bad, but trying to think, head hurts now 😳. Probably something simple.

Rick
WA6ES


On Apr 22, 2020, at 6:33 AM, Tim L <ptim15@...> wrote:


i just got a FULL DUPLEX HT last week but only had a chance to use it once. its been so cold and windy i don't  want to go out on the deck and play. i did go the day i got the radio and made one contact using the full duplex feature. the full duplex really helps. I have a Kenwood V71A that can run full duplex and i plan and giving that a try the soon as spring weather get here in NJ 

"There are only 10 types of people in the world:

 Those who understand binary and those who don't"

 

In today's email world 97% of all email is spam, please don't contribute.

 

Came of age in the 60's, now I'm in my 60's ... Whoa, WTF happened?


From: Work-Sat@groups.io <Work-Sat@groups.io> on behalf of Richard Silva via groups.io <rcksil@...>
Sent: Tuesday, April 21, 2020 9:12 PM
To: Work-Sat@groups.io <Work-Sat@groups.io>
Subject: Re: [Work-Sat] I have to be doing something wrong
 
I will try rotating, can’t hurt 


On Apr 21, 2020, at 5:40 PM, Robert Putala KE8UW <rcp@...> wrote:

Some satellites have transmit and receive at 90 degrees from each other.  When receiving a sat, try transmitting after rotating the antenna 90 degrees.  I’m a newbie to satellites also, but it seemed to work. 

Rob Putala
KE8UW

On Apr 21, 2020, at 5:13 PM, Clint Bradford via groups.io <clintbradford@...> wrote:

Are you transmitting the required tone???


Re: I have to be doing something wrong

Tim L
 

i just got a FULL DUPLEX HT last week but only had a chance to use it once. its been so cold and windy i don't  want to go out on the deck and play. i did go the day i got the radio and made one contact using the full duplex feature. the full duplex really helps. I have a Kenwood V71A that can run full duplex and i plan and giving that a try the soon as spring weather get here in NJ 

"There are only 10 types of people in the world:

 Those who understand binary and those who don't"

 

In today's email world 97% of all email is spam, please don't contribute.

 

Came of age in the 60's, now I'm in my 60's ... Whoa, WTF happened?


From: Work-Sat@groups.io <Work-Sat@groups.io> on behalf of Richard Silva via groups.io <rcksil@...>
Sent: Tuesday, April 21, 2020 9:12 PM
To: Work-Sat@groups.io <Work-Sat@groups.io>
Subject: Re: [Work-Sat] I have to be doing something wrong
 
I will try rotating, can’t hurt 


On Apr 21, 2020, at 5:40 PM, Robert Putala KE8UW <rcp@...> wrote:

Some satellites have transmit and receive at 90 degrees from each other.  When receiving a sat, try transmitting after rotating the antenna 90 degrees.  I’m a newbie to satellites also, but it seemed to work. 

Rob Putala
KE8UW

On Apr 21, 2020, at 5:13 PM, Clint Bradford via groups.io <clintbradford@...> wrote:

Are you transmitting the required tone???


Re: NOAA HRPT Imagery

Stefan Wagener
 

On Tue, Apr 21, 2020 at 10:54 PM Loren Lang <penguin359@...> wrote:
Hello all,

I have collected weather imagery from the NOAA weather satellites a number of times now yes the low resolution APT signal they transmit on the 137 megahertz band, but I like to step it up a notch and try for the high resolution HRPT signal instead. I have a HackRF One that should be able to do it with the right antennas. It's on the 1.7 gigahertz band and requires about 3 megahertz of bandwidth. Had anyone done this and what antenna did you use?

I was looking at maybe making this cloverleaf:

https://oscarliang.com/make-diy-cloverleaf-antenna/

Also, does anyone know if the Meteor M2 LRPT signal is transmitted over North America? It might be an easier stepping stone.

- Loren
K7IW


NOAA HRPT Imagery

 

Hello all,

I have collected weather imagery from the NOAA weather satellites a number of times now yes the low resolution APT signal they transmit on the 137 megahertz band, but I like to step it up a notch and try for the high resolution HRPT signal instead. I have a HackRF One that should be able to do it with the right antennas. It's on the 1.7 gigahertz band and requires about 3 megahertz of bandwidth. Had anyone done this and what antenna did you use?

I was looking at maybe making this cloverleaf:

https://oscarliang.com/make-diy-cloverleaf-antenna/

Also, does anyone know if the Meteor M2 LRPT signal is transmitted over North America? It might be an easier stepping stone.

- Loren
K7IW


Re: Recoding qsos

Christian Hoffman
 

The id51 has an SD card and can record audio on the main band.


On Mon, Apr 20, 2020, 11:25 AM Paul Ecker <eckerpw@...> wrote:
I have an id51 that I like to use a headset with. It has a dual plug for the speaker and mic jacks. I’d like to use a digital recorder to record my qsos with. Looking for ideas, methods people are using to funnel both sides of audio into a recorder

THANKS
73
paul
w2eck


Re: I have to be doing something wrong

Richard Silva <rcksil@...>
 

I will try rotating, can’t hurt 


On Apr 21, 2020, at 5:40 PM, Robert Putala KE8UW <rcp@...> wrote:

Some satellites have transmit and receive at 90 degrees from each other.  When receiving a sat, try transmitting after rotating the antenna 90 degrees.  I’m a newbie to satellites also, but it seemed to work. 

Rob Putala
KE8UW

On Apr 21, 2020, at 5:13 PM, Clint Bradford via groups.io <clintbradford@...> wrote:

Are you transmitting the required tone???