Date   
Re: Detecting Muons (And Not Morons) :)

L. Paul Verhage KD4STH
 

I recieved two of these a couple months ago for a test. They worked well on my ground tests and I'm planning to launch them on my next balloon flight. 

I have two so I can run them in coincidence mode. Only when a muon passes through both detectors, will it register as a detection. That will limit the BalloonSat to only detecting muons originating overhead.

On Dec 12, 2017 8:50 AM, "Michael mw@... [GPSL]" <GPSL-noreply@...> wrote:

Hello all,

Here is an article I ran across today, I am thinking this would be a
great project for HS kids here in Granbury to fly in our April balloon
flight.

Might be a nice project for GPSL 2018 as well!

http://electronics360.globalspec.com/article/10399/build-your-own-muon-detector?id=%2D526774784&uh=964fe1&email=mw%40omsrc%2Ecom&md=171212&mh=59c2c3&Vol=Vol12Issue24&Pub=49&LinkId=1901126&keyword=link%5F1901126&et_rid=500375382&et_mid=83581000&frmtrk=newsletter&cid=nl

--Michael K5NOT


------------------------------------
Posted by: Michael <mw@...>
------------------------------------


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Detecting Muons (And Not Morons) :)

Michael
 

Hello all,

Here is an article I ran across today, I am thinking this would be a great project for HS kids here in Granbury to fly in our April balloon flight.

Might be a nice project for GPSL 2018 as well!

http://electronics360.globalspec.com/article/10399/build-your-own-muon-detector?id=%2D526774784&uh=964fe1&email=mw%40omsrc%2Ecom&md=171212&mh=59c2c3&Vol=Vol12Issue24&Pub=49&LinkId=1901126&keyword=link%5F1901126&et_rid=500375382&et_mid=83581000&frmtrk=newsletter&cid=nl

--Michael K5NOT

Willunga High School 2017 Launch Data

L. Paul Verhage KD4STH
 

The First BalloonSats Without Borders flight took place in Australia yesterday. Here's a short reply about the flight.

I'm now in search of another place to launch. Is anyone from the other side of the Atlantic interested in swapping experiments to fly?
---------- Forwarded message ----------
From: "Mark Jessop" <vk5qi@...>
Date: Dec 7, 2017 2:06 AM
Subject: Willunga High School 2017 Launch Data
To: "Michael Osborn" <Michael.Osborn@...>, "L. Paul Verhage" <nearsys@...>
Cc:

Hi Michael, Paul,

Today's launch went very well! 

We launched right ahead of a cold front that was moving in, which threatened to make the flight challenging. During my drive to the launch site I encountered large areas of showers, however the Willunga area stayed clear for quite a while. 
The winds did start to pick up during launch preparations, but were not strong enough to make the launch difficult. We ended up with a total payload mass (combined across the 2x telemetry payloads, 1x Wenet imagery payload, and the BalloonSat) of approximately 1300g.

If I remember correctly, the data recorder was activated about 10 minutes prior to launch. Unfortunately I'm not sure either Michael or I got the exact time.

The flight proceeded pretty much as planned, with an average ascent rate of 5.2m/s. The payload's ground speed was observed to reach 200kph at some points during the flight. The balloon was cut away at just under the predicted burst altitude of 30km, in an attempt to bring the landing site closer towards the Dukes Highway, a major highway running through the region. The maximum altitude was 29949m. 

The descent rate was faster than expected, around 10m/s on landing. This turned out to be due to one of the payloads tangling with the parachute, causing it to not open completely. This brought the landing location a bit further away from the highway, and made the descent portion of the flight too fast for the lone chase team (me + friend) to get to the landing site in time to watch the landing. 

We arrived about 20 minutes after landing to find the payload in a large, recently cropped field, about 200m from a road. Shortly after we departed, the cold front arrived and the rain started - we had recovered just in time!

All the payloads are in good condition, in spite of the faster-than-expected landing. I've made a copy of the video and pictures off the balloonsat payload, and have also copied off the locally-stored Wenet imagery. 
I noted that the video camera filled up its 8GB SD card not long after burst (judging from the footage), so a larger SD card would probably be needed to capture the entire flight. 

The live Wenet imagery didn't perform too well, mainly because the only receiver was the one in my chase car, and that had lots of issues with mobile signal flutter. As the launch was in the middle of the week, we weren't able to have a stationary listener. You can see the impact of the missed packets on the live imagery page here: http://ssdv.habhub.org/VK5ARG  (scroll down to see the images which are missing many packets)
All the Wenet payload images were saved to SD card anyway, so I was able to recover them after landing.

I've uploaded telemetry information, some screenshots of the flight path, and a few images from the Wenet imagery payload to DropBox here:

I don't have a fast enough net connection to upload the video anywhere, so that will have to come later.

Cheers,
Mark Jessop
Project Horus

Re: Transmissions on Balloons

Bill Brown
 

Ah...thanks Leo, I forgot to mention RTTY. I used that a lot in the early days for telemetry before APRS came onto the scene. I also used an analog voice chip (any of the ISD series) which I could address various voice clips that I prerecorded into the device and used that to send down voice telemetry on FM. ARBONET flew a voice telemetry payload during a GPSL a few years ago. As I recall it said something like "Help I'm lost" when the GPS failed.
 
- Bill WB8ELK
 
 
 
 

-----Original Message-----
From: Leo Bodnar leo@... [GPSL]
To: GPSL@... List
Sent: Wed, Dec 6, 2017 12:18 pm
Subject: Re: [GPSL] Transmissions on Balloons

 
Few more modes:
Majority of UK flights use[d] RTTY
Some UK flights have used THOR16
Many flights use LoRa modulation now
There were flights on the continent using voice FM transmissions.  I had a B-class payload ready to go but it did not make it into the air, here is off-air test recording http://www.leobodnar.com/balloons/files/B-number-station.wav

Cheers
Leo

On 6 Dec 2017, at 17:22, wb8elk@... [GPSL] wrote:

  DominoEX, Contestia, JT9 and good ole fashioned CW to name a few.

From: 'L. Paul Verhage' nearsys@... [GPSL] <GPSL-noreply@...>

So aside from APRS, WISPR, Hellscriber, ATV, and SSTV, what other transmission types are used in balloons?

Re: Transmissions on Balloons

Jack Crabtree
 

PSK31 and CW!

On 12/6/2017 7:27:16 AM, 'L. Paul Verhage' nearsys@... [GPSL] wrote:

So aside from APRS, WISPR, Hellscriber, ATV, and SSTV, what other transmission types are used in balloons?

And by the way, what did the Romans ever give us?

I assume some ballons have carried did hunting systems as a backup in the past, but today?

Thanks

Re: Transmissions on Balloons

Leo Bodnar <leo@...>
 

Few more modes:
Majority of UK flights use[d] RTTY
Some UK flights have used THOR16
Many flights use LoRa modulation now
There were flights on the continent using voice FM transmissions.  I had a B-class payload ready to go but it did not make it into the air, here is off-air test recording http://www.leobodnar.com/balloons/files/B-number-station.wav

Cheers
Leo


On 6 Dec 2017, at 17:22, wb8elk@... [GPSL] wrote:

  DominoEX, Contestia, JT9 and good ole fashioned CW to name a few.

From: 'L. Paul Verhage' nearsys@... [GPSL] <GPSL-noreply@...>

So aside from APRS, WISPR, Hellscriber, ATV, and SSTV, what other transmission types are used in balloons?

Re: Transmissions on Balloons

Bill Brown
 

Hi Paul,
 
  DominoEX, Contestia, JT9 and good ole fashioned CW to name a few.
 
- Bill WB8ELK
 
 

-----Original Message-----
From: 'L. Paul Verhage' nearsys@... [GPSL]
To: GPSL@...
Sent: Wed, Dec 6, 2017 8:27 am
Subject: [GPSL] Transmissions on Balloons

 
So aside from APRS, WISPR, Hellscriber, ATV, and SSTV, what other transmission types are used in balloons?

And by the way, what did the Romans ever give us?

I assume some ballons have carried did hunting systems as a backup in the past, but today?

Thanks

Transmissions on Balloons

L. Paul Verhage KD4STH
 

So aside from APRS, WISPR, Hellscriber, ATV, and SSTV, what other transmission types are used in balloons?

And by the way, what did the Romans ever give us?

I assume some ballons have carried did hunting systems as a backup in the past, but today?

Thanks

Re: ATV

John Maca
 

We have been flying a DVB-T Digital camera/transmitter for our past couple of summer flights.  The unit is from HiRes (www.hires.com.tw) and the latest model is a DC-105.  The unit only puts out a couple mW on 434 MHz, so a very linear amplifier is required to get sufficient power (~300-500 mW) for the downlink.  I'm not the ATV/DTV guru in the group, but I think the digital config is 16 QAM at 4 Mbps data rate, although they have been tuning the config to get the best quality video from a spinning payload.  

Another cool payload we flew last August was a DMR repeater (stripped down Motorola XPR8300) that performed beyond expectations.  It only had ~15mW output as the final PA was blown and a mini-circuits amp was hacked in-line to get the 15 mW out.  The guy that supplied that payload is already working to build a lighter version.  

John
AB5SS

Re: ATV

L. Paul Verhage KD4STH
 

So ATV is still being flown. 

Does everyone feel they're flying ATV as much as it was in the past?

I've only flown ATV for one year followed by flying SSTV the next year. I gave them up after video cameras became cheap enough to launch. I've always liked their quality over ATV and SSTV.

On Dec 5, 2017 2:22 PM, <wb8elk@...> wrote:
The local university still flies ATV on 434 MHz as well as payloads that I still fly on occasion. I use the VM-70X TV transmitter by PC Electronics along with their Little Wheel antenna.
 
I have also been flying SSTV via the SSTVcam by Argent Data hooked up to a 2m FM transmitter.
 
- Bill WB8ELK
 
 
 
-----Original Message-----
From: 'L. Paul Verhage' nearsys@... [GPSL] <GPSL-noreply@...>
To: GPSL <GPSL@...>
Sent: Mon, Dec 4, 2017 6:43 pm
Subject: Re: [GPSL] ATV

 
If it's on the ham band of 5.8 gigahertz than I would still call that ATV.

Am I right then, and understanding it that there's not much ATV going on these days?

On Dec 4, 2017 9:41 AM, "Jack Crabtree" <jscra@...> wrote:
We flew our first ATV package on November 18, 1990 from Denver. A video of the flight is available at: https://www.youtube.com/watch?v=Gk6_WG71C-s&t=256s 
Now we use PiCams, Raspberry Pis, and 5.8 GHz Wifi Modems. Is this still considered ATV?
Jack Crabtree

On 12/4/2017 6:33:12 AM, 'L. Paul Verhage' nearsys@... [GPSL] <gpsl-noreply@...> wrote:


Does anyone fly amateur television anymore? What about digital? It seems to me that digital requires a PC and that's not practical on a balloon flight. Thanks


Re: ATV

L. Paul Verhage KD4STH
 

If it's on the ham band of 5.8 gigahertz than I would still call that ATV.

Am I right then, and understanding it that there's not much ATV going on these days?

On Dec 4, 2017 9:41 AM, "Jack Crabtree" <jscra@...> wrote:
We flew our first ATV package on November 18, 1990 from Denver. A video of the flight is available at: https://www.youtube.com/watch?v=Gk6_WG71C-s&t=256s 
Now we use PiCams, Raspberry Pis, and 5.8 GHz Wifi Modems. Is this still considered ATV?
Jack Crabtree

On 12/4/2017 6:33:12 AM, 'L. Paul Verhage' nearsys@... [GPSL] <gpsl-noreply@...> wrote:



Does anyone fly amateur television anymore? What about digital? It seems to me that digital requires a PC and that's not practical on a balloon flight. Thanks


Re: ATV

Jack Crabtree
 

No it is on the exclusive ham band segments on 5.8 GHz, AREDN software is used to put the modems on the ham.
Jack

On 12/4/2017 10:43:24 AM, 'L. Paul Verhage' nearsys@... [GPSL] wrote:

So tv off the amatuer band. I'm beginning to think ATV and SSTV isn't used any more. 

Perhaps the drop in high quality, light weight video recording equipment is a reason. Also, I'd like to think we're losing fewer payloads and can now wait to get the payload back to see the video. Or perhaps it's because we've grown use to seeing near space video and it's just less important.

On Dec 4, 2017 9:41 AM, "Jack Crabtree" <jscra@...> wrote:
We flew our first ATV package on November 18, 1990 from Denver. A video of the flight is available at: https://www.youtube.com/watch?v=Gk6_WG71C-s&t=256s 
Now we use PiCams, Raspberry Pis, and 5.8 GHz Wifi Modems. Is this still considered ATV?
Jack Crabtree

On 12/4/2017 6:33:12 AM, 'L. Paul Verhage' nearsys@... [GPSL] <gpsl-noreply@...> wrote:



Does anyone fly amateur television anymore? What about digital? It seems to me that digital requires a PC and that's not practical on a balloon flight. Thanks


Re: ATV

L. Paul Verhage KD4STH
 

So tv off the amatuer band. I'm beginning to think ATV and SSTV isn't used any more. 

Perhaps the drop in high quality, light weight video recording equipment is a reason. Also, I'd like to think we're losing fewer payloads and can now wait to get the payload back to see the video. Or perhaps it's because we've grown use to seeing near space video and it's just less important.

On Dec 4, 2017 9:41 AM, "Jack Crabtree" <jscra@...> wrote:
We flew our first ATV package on November 18, 1990 from Denver. A video of the flight is available at: https://www.youtube.com/watch?v=Gk6_WG71C-s&t=256s 
Now we use PiCams, Raspberry Pis, and 5.8 GHz Wifi Modems. Is this still considered ATV?
Jack Crabtree

On 12/4/2017 6:33:12 AM, 'L. Paul Verhage' nearsys@... [GPSL] <gpsl-noreply@...> wrote:



Does anyone fly amateur television anymore? What about digital? It seems to me that digital requires a PC and that's not practical on a balloon flight. Thanks


Re: ATV [1 Attachment]

Michael Hojnowski
 

On 12/4/2017 11:23 AM, Joe wrote:
What are ya using for a tranny?

Videolynx VM-70X 5 watt transmiter.

Mike/KD2EAT

Re: ATV

Jack Crabtree
 

We flew our first ATV package on November 18, 1990 from Denver. A video of the flight is available at: https://www.youtube.com/watch?v=Gk6_WG71C-s&t=256s 
Now we use PiCams, Raspberry Pis, and 5.8 GHz Wifi Modems. Is this still considered ATV?
Jack Crabtree

On 12/4/2017 6:33:12 AM, 'L. Paul Verhage' nearsys@... [GPSL] wrote:

Does anyone fly amateur television anymore? What about digital? It seems to me that digital requires a PC and that's not practical on a balloon flight. Thanks

Re: ATV [1 Attachment]

Joe WB9SBD
 

What are ya using for a tranny?

Joe

The Original Rolling Ball Clock
Idle Tyme
Idle-Tyme.com
http://www.idle-tyme.com

On 12/4/2017 10:16 AM, Michael Hojnowski kd2eat@... [GPSL] wrote:
Joe,

Funny you should mention GPS.  Ya, that was causing me problems as I tested my payload.  I wired up an on-screen display module, with the intent to overlay Lat / Long / Altitude data on the picture.  It works great with a low power transmitter.  When I put my "big" transmitter on there, the GPS wouldn't get a lock.  I need to rethink my payload setup and get the GPS module away from the transmit antenna, and maybe think about some shielding.  Between that, and being hesitant about the expense in the event of a lost payload, that's when I set it all aside.

Mike / KD2EAT

On 12/4/2017 11:05 AM, Joe wrote:
ATV flights is the heart of all this ballooning stuff! It's mostly all we did way back in the beginning what 30 years ago now, UG! I've been doing these things for 30 years!?

ATV is TOUGH tho to do good. People are sooo used to the new TV where pictures are always PERFECT. an ATV from a Balloon will NEVER be perfect. Even right after liftoff when the payload is only 100 yards away. Multipath can rip the signal to shreds even tho it's incredibly strong!

I would do a Video flight of your own before doing a public one so you can see what your results would be.

The biggest recv antenna ya can get is a MUST as well as a high gain low noise preamp. AT THE ANTENNA

There is a REASON TV stations run megawatts!

Also if you plan on using a GPS system. Place it in a totally separate from the ATV transmitter, from 50+ flights with GPS's onboard, the only times we had ANY trouble with a GPS, is when we were running an ATV transmitter. separating them cured that issue.

Joe WB9SBD

The Original Rolling Ball Clock
Idle Tyme
Idle-Tyme.com
http://www.idle-tyme.com

On 12/4/2017 9:40 AM, Michael Hojnowski kd2eat@... [GPSL] wrote:
On 12/4/2017 8:33 AM, 'L. Paul Verhage' nearsys@... [GPSL] wrote:
 
Does anyone fly amateur television anymore? What about digital? It seems to me that digital requires a PC and that's not practical on a balloon flight. Thanks

I've had the gear for about 2 years.  I just haven't gotten 'round to it, as it's a significant investment in the payload.  I launched a HAB from a local hamfest last year, and sparked a lot of interest in balloons. I may talk to the hamfest organizers about launching an ATV flight next year.  It might be fun if they had a ground station at the fest that could monitor the flight after launch.

Mike



Re: ATV

Michael Hojnowski
 

Joe,

Funny you should mention GPS.  Ya, that was causing me problems as I tested my payload.  I wired up an on-screen display module, with the intent to overlay Lat / Long / Altitude data on the picture.  It works great with a low power transmitter.  When I put my "big" transmitter on there, the GPS wouldn't get a lock.  I need to rethink my payload setup and get the GPS module away from the transmit antenna, and maybe think about some shielding.  Between that, and being hesitant about the expense in the event of a lost payload, that's when I set it all aside.

Mike / KD2EAT

On 12/4/2017 11:05 AM, Joe wrote:
ATV flights is the heart of all this ballooning stuff! It's mostly all we did way back in the beginning what 30 years ago now, UG! I've been doing these things for 30 years!?

ATV is TOUGH tho to do good. People are sooo used to the new TV where pictures are always PERFECT. an ATV from a Balloon will NEVER be perfect. Even right after liftoff when the payload is only 100 yards away. Multipath can rip the signal to shreds even tho it's incredibly strong!

I would do a Video flight of your own before doing a public one so you can see what your results would be.

The biggest recv antenna ya can get is a MUST as well as a high gain low noise preamp. AT THE ANTENNA

There is a REASON TV stations run megawatts!

Also if you plan on using a GPS system. Place it in a totally separate from the ATV transmitter, from 50+ flights with GPS's onboard, the only times we had ANY trouble with a GPS, is when we were running an ATV transmitter. separating them cured that issue.

Joe WB9SBD

The Original Rolling Ball Clock
Idle Tyme
Idle-Tyme.com
http://www.idle-tyme.com

On 12/4/2017 9:40 AM, Michael Hojnowski kd2eat@... [GPSL] wrote:
On 12/4/2017 8:33 AM, 'L. Paul Verhage' nearsys@... [GPSL] wrote:
 
Does anyone fly amateur television anymore? What about digital? It seems to me that digital requires a PC and that's not practical on a balloon flight. Thanks

I've had the gear for about 2 years.  I just haven't gotten 'round to it, as it's a significant investment in the payload.  I launched a HAB from a local hamfest last year, and sparked a lot of interest in balloons. I may talk to the hamfest organizers about launching an ATV flight next year.  It might be fun if they had a ground station at the fest that could monitor the flight after launch.

Mike


Re: ATV

Michael Hojnowski
 

On 12/4/2017 8:33 AM, 'L. Paul Verhage' nearsys@... [GPSL] wrote:
 
Does anyone fly amateur television anymore? What about digital? It seems to me that digital requires a PC and that's not practical on a balloon flight. Thanks

I've had the gear for about 2 years.  I just haven't gotten 'round to it, as it's a significant investment in the payload.  I launched a HAB from a local hamfest last year, and sparked a lot of interest in balloons. I may talk to the hamfest organizers about launching an ATV flight next year.  It might be fun if they had a ground station at the fest that could monitor the flight after launch.

Mike

ATV

L. Paul Verhage KD4STH
 

Does anyone fly amateur television anymore? What about digital? It seems to me that digital requires a PC and that's not practical on a balloon flight. Thanks

First Private Electric Car to Mars

L. Paul Verhage KD4STH
 

Here's a link to Elin Musk's plan to send a Tesla Roadster to Mars (or at least to a Mars passing orbit).