Date   
Re: another online prediction tool

Steve Aerospace
 

Word from the other side of the pond:-

The Mancunian Balloonian project at the University of Manchester UK ( http://manseds.co.uk/index.html ) have been using the API to the Habitat predictor to do Montie Carlo runs varying flight parameters to get a similar heat map output - see https://www.youtube.com/watch?v=9tVPAtmtc7w

The Habitat predictor holds the GFS world data in RAM - consequently it’s quite quick.

The Southampton predictor has been around for 3 - 4 years.  I’ve used it a few times - the heat map output is cool and its seems well thought out (the theory is extensive).  The user interface is reasonably intuitive and quite easy to use.  However the few times I’ve used it I haven’t found the results more accurate than Habitat, on the downside its much slower (I suspect they hold the GFS data on disk).

Steve G8KHW




On 28 Mar 2017, at 16:02, Jerry Gable jerrygable@... [GPSL] <GPSL-noreply@...> wrote:


That is kind of what I did with my GPSL predictions only manually.  I always ran 6 predictions, 60K, 90K & 105K burst  1100FPM & 850FPM Asc/desc.  Then for good measure I would add the habhub prediction as a test.



I have been thinking about adding a way in my tool to automatically run the multiple runs but never got around to it.  My tool never really caught on so haven't spent much time on it.

 
Jerry Gable
Balloon Flight Prediction tools
http://www.s3research.com



From: "'L. Paul Verhage' nearsys@... [GPSL]" <GPSL-noreply@...>
To: GPSL@... 
Sent: Tuesday, March 28, 2017 7:40 AM
Subject: Re: [GPSL] another online prediction tool

 
So I wonder if we could create a good landing zone prediction by varying the ascent rate and burst altitudes by plus or minus some percent. Say 10%. Then use a combination of these variations to map out a recovery ellipse (I assume it would an ellipse shape with the major axis aligned along the overall flight path). 
On Mar 28, 2017 8:35 AM, "Jerry Gable jerrygable@... [GPSL]" <GPSL-noreply@...> wrote:
[Attachment(s) from Jerry Gable included below] 

To me it looks like their tool takes in variances in the weather data but my experience has been human caused variances such as fill and burst altitude.  

Here is my correlation from GPSL last year.  After the flights I ran a prediction with the actual ascent, decent, and burst.  I used the preflight weather data and they all came out pretty close. 



 
Jerry Gable
Balloon Flight Prediction tools
http://www.s3research.com



From: "Mark Conner mconner1@... [GPSL]" <GPSL-noreply@...>
To: 
Cc: GPSL list <GPSL@...>
Sent: Monday, March 27, 2017 1:29 PM
Subject: Re: [GPSL] another online prediction tool

 
Not only are U and V covariant with each other to some degree, but there is covariance with height.  Each wind level is not independent of the levels adjacent to it - in fact they are highly correlated.  If you have winds at 180/25 at 250 mb, they will be very close to that value at 240 and 260 mb.  

Below is a heat map for my planned Saturday launch.  I think it underestimates the left/right uncertainty in the track, and probably the distance as well.  It certainly underestimates the overall uncertainty in using a 120-hour forecast versus, say, a 24-hour forecast.

Don't get me wrong, doing a Monte Carlo approach is a good way to get a peek at uncertainty.  But I'm not sure if this is a full measure of the overall uncertainty in the landing site prediction.

73 de Mark N9XTN


Inline image 1

On Mon, Mar 27, 2017 at 11:40 AM, Mark Conner <mconner1@...> wrote:
The model treats it as U and V.  The model is on a Cartesian grid but "knows" it's on a sphere (the physics account for that).

It's more a statistical exercise in the wind errors.  Is it better to treat U and V errors independently, or is there covariance?  Does that covariance change as the vector magnitudes change?  Winds aren't truly random, so Gaussian statistics may not apply.  

So is it better to assume that U has a standard deviation of n m/sec and V has a SD of y m/sec, or is it better to assume that direction has a standard deviation of q degrees and speed a SD or r m/sec?  The "r" part would not be Gaussian because it could not be negative, so some other distribution would have to be assumed.

Something I'd like to explore in the literature more.  Someday.

- Mark


On Mon, Mar 27, 2017 at 11:17 AM, 'L. Paul Verhage' nearsys@... [GPSL] <GPSL-noreply@...> wrote:


Interesting, they describe the transition at Hank's Knee as the Drag Crisis Band. The paper looks very interesting in my brief and cursory look. It appears the Reynold's Number of the balloon makes a gradual descrease during the entire ascent.
Mark's comment makes me wonder now how the GFS model generates wind profiles. Is it in the north-south direction and the east-west direction or does it generate speed and direction directly. I guess this could be referred to as generating wind profiles in Cartesian or Polar coordinates. As we will recall from high school, each can be converted into the other. But which is easier to compute for supercomputers generating the GFS model (enquiring minds want to know)?
;)
Still, all kidding aside, the paper and the questions it brings to mind are interesting. I'll find some time to read it in more detail. For example, I'd like to learn what percentage of variation it puts into the data for each prediction.
On Mar 27, 2017 10:03 AM, "Mark Conner mconner1@... [GPSL]" <GPSL-noreply@...> wrote:


The full paper describing the methodology is here:

The Reynolds number transition, mentioned in an EOSS presentation at GPSL several years ago, is modeled here.  For others with balloon flight forecasting tools, there are some concepts here that could be leveraged.

The treatment of wind uncertainty is interesting.  Most models, including this one, treat the uncertainty independently in the u (east/west) and v (north/south) vector components.  I've always thought, without anything to really back it up, that uncertainties should be handled in direction and speed space and then taken back to u/v for computations.  But I don't know if that will produce numerically different results in the end.

73 de Mark N9XTN

On Sun, Mar 26, 2017 at 4:43 PM, 'L. Paul Verhage' nearsys@... [GPSL] <GPSL-noreply@...> wrote:


This is much quicker than running several predictions with various input parameters. I think this form of modeling a landing zone can be called the Monte Carlo method.
On Mar 26, 2017 10:42 AM, "Mark Conner mconner1@... [GPSL]" <GPSL-noreply@...> wrote:



This one is interesting in that it will run numerous predictions with variations in the launch parameters and return a heat map showing the likely landing zone.  I did one for our NSTAR 17-A launch from Lincoln scheduled for next Saturday.

Inline image 1

Around 50 simulations seems to be enough to generate a reasonable map.  I tried 50 and 150 for this flight and the heat map did not change very much.

73 de Mark N9XTN




















Steve Randall
Random Engineering Ltd
+44 7802 242135



Re: High Capacity

Bill Brown
 

Actually I've been using the Eveready L91 AA lithium batteries for most regular flights...they are pretty good capacity and can handle the cold temperatures. But they still do make the big honking mil packs...BA5590/U with those amazing 7500 mAh cells inside. The pack weighs 2.2 pounds though and with their new hard plastic shells they are hard to break open...not like the good ole days with the cardboard covering.

- Bill WB8ELK



-----Original Message-----
From: Joe
To: WB8ELK
Sent: Mon, Mar 27, 2017 6:46 pm
Subject: High Capacity

What is everyone using now days for high capacity battery packs.

All the craze lately have been the pico balloons. not the Big hionking power hungry ones.

I sure miss those 7500 mah packs!

Joe
--

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

Re: High Capacity

L. Paul Verhage KD4STH
 

My trackers use 2200 mAh rechargeable LiPos. These are the RC car batteries you find at hobby shops.

That reminds me, I need to purchase another one. I accidentally over discharged one by forgetting to turn off the tracker.

On Mar 29, 2017 12:37 AM, "wb8elk@... [GPSL]" <GPSL-noreply@...> wrote:


Actually I've been using the Eveready L91 AA lithium batteries for most regular flights...they are pretty good capacity and can handle the cold temperatures. But they still do make the big honking mil packs...BA5590/U with those amazing 7500 mAh cells inside. The pack weighs 2.2 pounds though and with their new hard plastic shells they are hard to break open...not like the good ole days with the cardboard covering.

- Bill WB8ELK



-----Original Message-----
From: Joe <nss@...>
To: WB8ELK <WB8ELK@...>
Sent: Mon, Mar 27, 2017 6:46 pm
Subject: High Capacity

What is everyone using now days for high capacity battery packs.

All the craze lately have been the pico balloons. not the Big hionking power hungry ones.

I sure miss those 7500 mah packs!

Joe
--

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



SpaceX did It!

L. Paul Verhage KD4STH
 

SpaceX just stuck their landing of a first stage booster that's been launched a second time.

It makes me want to engineer a way to refly weather balloons. I think two rolls of duct tape should be enough.

Re: SpaceX did It!

Michael
 

Years ago at the GPSL gathering in Hutchison I presented a valve controlled balloon design that would get both a linear ascent and descent, not so much for re-use but rather for more controlled float and landing. So the idea did not include much duct tape and I knew then it probably would not work as well as hoped. 

--Michael Willett

On Mar 30, 2017, at 5:41 PM, 'L. Paul Verhage' nearsys@... [GPSL] <GPSL-noreply@...> wrote:

 

SpaceX just stuck their landing of a first stage booster that's been launched a second time.

It makes me want to engineer a way to refly weather balloons. I think two rolls of duct tape should be enough.

Inter-Balloon Crossband Repeating

Andrew Koenig
 

Hello Gang,

This past weekend PHAB-16 flew (Plano TX crew) in the North Texas area. At the "after feed" we were discussing upcoming launches, particularly how we'd like to fly something on the same day as GPSL since a good portion of the people from Texas won't be able to tag along at GPSL this year. At some point it was brought up that it would be very neat to try and connect crossband repeaters between the various balloons that will be flying at the same time. I've slept on the idea, and here's what I've come up with.

The typical crossband repeater should consist of a 440 receiver and a 2m transmitter. Inter-balloon linking should take place on 220 to avoid desensing the other payloads (with special consideration given to the 2nd harmonic). The 440 receiver will trigger both the 220 transmitter and the 2m transmitter. The 220 receiver will trigger the 2m transmitter. Participating balloons will have a common simplex 220 channel that will serve as a half-duplex backhaul. I have not given much thought to antennas, but rubber ducks should suffice for 2m/440 and maybe a slim jim for 220(?).

With the availability of Baofengs and whatnot on 220, it shouldn't be hard to procure the necessary equipment to make this happen. I bought another UV-82 the other day for $27. I need to see how I can pull COR from this HT, but the worst case scenario is that I use the green LED signal indicator. I will likely end up using some form of an Arduino to handle logic. I'm hoping the audio networks can be strictly resistive, but there may need to be some gain or buffering. The various radios used in this project will be stripped down to the bare essentials to address weight concerns.

I plan on putting together one of these contraptions when that UV-82 wanders in from Amazon. Should initial testing go well, would there be any others that would want to fly such a payload on their balloon as well? Depending on interest, I'd be willing to build and donate a few of these boxes to the cause.

Thoughts? Questions? Does it seem interesting to y'all?

73 de KE5GDB

--
Andrew Koenig

GPSL Update

Zack Clobes W0ZC
 

The schedule for GPSL is starting to come together.

Registration
If you haven't already, please register you attendance.  I'll be sending out PayPal requests later this week for attendance dues.  It is acceptable to pay at the door, but payment in advance really helps me cover the costs (most of which are due ahead of time).



Thursday Afternoon Tour
I have a tour arranged for the Kansas Law Enforcement Training Center, just south of Hutchinson.  Details will be coming, but the tour will start at 3:00pm, and is held roughly a half hour south of Hutchinson.

The Hall of Space at the Cosmosphere will also be available to tour Thursday morning and early afternoon, for those arriving early.  Tell them you are with the GPSL group, and you will receive your pass free of charge.

If you are planning on attending the tour of the Law Enforcement Training Center, please email me a head count.  I don't think children will be a problem, but if you have anyone under 18 attending, please let me know so that I can verify that.


Hydrogen
For those of you purchasing gas, I'll be sending around a PayPal request for gas fees this week also.  If you need to make other non-PayPal arrangements, please email me and we can work something out.


Launch Sites
Our primary launch site will be the Hutchinson Airport, just as we did a couple of years back.  The secondary site has not been established yet.


Agenda
The Agenda is nearly complete.  I DO STILL HAVE TWO SLOTS OPEN FOR PRESENTERS.  If you would be interested in presenting, or would like to nominate someone else to present, please do so now!



Arrivals
I haven't heard any updates on hotel arrangements, but I do know that the hotels are filling up in Hutchinson that weekend.  If you could please update the group with you planned arrival time and where you'll be staying, I'm sure that others would be interested.



Sorry, I know that's a lot to take in for one email.  Let me know if you have questions or concerns.



Zack Clobes, W0ZC
Project: Traveler
www.projecttraveler.org

Join us on Facebook for the latest information:



Project: Traveler is a research project of Custom Digital Services, LLC.


Re: GPSL Update

BASE
 

BASE DePauw will be there.  Marilyn and I plus two students are planning on arriving late in the day on Wednesday.  We will participate in the tour on Thursday afternoon.  We are staying at the Days Inn in Hutchinson.

See everyone in a couple of months.

Howard, KC9QBN


On Saturday, April 8, 2017 9:08 PM, "Zack Clobes zclobes@... [GPSL]" wrote:


 
The schedule for GPSL is starting to come together.

Registration
If you haven't already, please register you attendance.  I'll be sending out PayPal requests later this week for attendance dues.  It is acceptable to pay at the door, but payment in advance really helps me cover the costs (most of which are due ahead of time).



Thursday Afternoon Tour
I have a tour arranged for the Kansas Law Enforcement Training Center, just south of Hutchinson.  Details will be coming, but the tour will start at 3:00pm, and is held roughly a half hour south of Hutchinson.

The Hall of Space at the Cosmosphere will also be available to tour Thursday morning and early afternoon, for those arriving early.  Tell them you are with the GPSL group, and you will receive your pass free of charge.

If you are planning on attending the tour of the Law Enforcement Training Center, please email me a head count.  I don't think children will be a problem, but if you have anyone under 18 attending, please let me know so that I can verify that.


Hydrogen
For those of you purchasing gas, I'll be sending around a PayPal request for gas fees this week also.  If you need to make other non-PayPal arrangements, please email me and we can work something out.


Launch Sites
Our primary launch site will be the Hutchinson Airport, just as we did a couple of years back.  The secondary site has not been established yet.


Agenda
The Agenda is nearly complete.  I DO STILL HAVE TWO SLOTS OPEN FOR PRESENTERS.  If you would be interested in presenting, or would like to nominate someone else to present, please do so now!



Arrivals
I haven't heard any updates on hotel arrangements, but I do know that the hotels are filling up in Hutchinson that weekend.  If you could please update the group with you planned arrival time and where you'll be staying, I'm sure that others would be interested.



Sorry, I know that's a lot to take in for one email.  Let me know if you have questions or concerns.



Zack Clobes, W0ZC
Project: Traveler
www.projecttraveler.org

Join us on Facebook for the latest information:



Project: Traveler is a research project of Custom Digital Services, LLC.




FW: May 2017 QST article on Bill Brown

Don Fraser
 

To: 'GPSL@...' <GPSL@...>; 'wb8elk@...' <wb8elk@...>
Cc: 'jglifort@...' <jglifort@...>
Subject: May 2017 QST article on Bill Brown


Great article on Bill's history of HAB launches in this month's QST on page 79 & 80. It starts with some of his first efforts in 1987 and then works forward to today briefly describing some of his projects.

The article concludes with pointers to several GPSL members and support organizations.

So, congratulations to Bill because just after this summer's August 21st eclipse flights, he'll have completed 30 years of HAB work and leadership yet he shows no signs of slowing down.

Don, WA9WWS

Does anyone need chase vehicle help at GPSL?

Michael Hojnowski
 

Hey Gang,

I'll be attending GPSL. I'm up in the air, so to speak, as to whether I want to launch a balloon, or just help someone who needs foxhunting assistance. I'll have my fully equipped 4wd chase vehicle along with APRS, Laptop, aprsisce, etc. I'll have room for up to 3 passengers, if anyone wants to ride along.

If someone wanted to launch, but was concerned about a chase vehicle, I may be your guy. If i don't have any takers, I'll plan to launch a simple payload of my own, just so we can fill the sky with balloons. Regardless, I'm planning to launch another WSPR pico this year.

If interested in a chase assistance, please let me know in the next few days, so I can register and request (or not) hydrogen.

Thanks,
Mike / KD2EAT

Re: Does anyone need chase vehicle help at GPSL?

Michael West W5MAW
 

Hey Mike (and all),

 

KG5PVB and I will be attending for the first time, only planning to chase right now. From what I’ve heard, there isn’t as much coordination on who chases what? Is there chaser etiquette I’m missing?

 

See you there,

 

--

Michael West

https://mwe.st

 

From: GPSL@... [mailto:GPSL@...] On Behalf Of Michael Hojnowski kd2eat@... [GPSL]
Sent: Saturday, April 15, 2017 9:41 AM
To: Group GPSL <GPSL@...>
Subject: [GPSL] Does anyone need chase vehicle help at GPSL?

 

 

Hey Gang,

I'll be attending GPSL. I'm up in the air, so to speak, as to whether I
want to launch a balloon, or just help someone who needs foxhunting
assistance. I'll have my fully equipped 4wd chase vehicle along with
APRS, Laptop, aprsisce, etc. I'll have room for up to 3 passengers, if
anyone wants to ride along.

If someone wanted to launch, but was concerned about a chase vehicle, I
may be your guy. If i don't have any takers, I'll plan to launch a
simple payload of my own, just so we can fill the sky with balloons.
Regardless, I'm planning to launch another WSPR pico this year.

If interested in a chase assistance, please let me know in the next few
days, so I can register and request (or not) hydrogen.

Thanks,
Mike / KD2EAT

Re: Does anyone need chase vehicle help at GPSL?

BASE
 

Usually at GPSL we coordinate the initial chase teams.  That is one part of the pre-flight meeting on Friday afternoon.

EOSS always has more that enough folks to assist other single vehicle teams.  BASE DePauw will be a single team and we can always use a second vehicle, or even a third.  I would be happy to have assistance again this year.

Once all of the payloads have landed, then we generally pool our efforts to help anyone who has lost contact with their payload.

Howard, KC9QBN
BASE DePauw


On Saturday, April 15, 2017 6:23 PM, "Michael West michael@... [GPSL]"


 
Hey Mike (and all),
 
KG5PVB and I will be attending for the first time, only planning to chase right now. From what I’ve heard, there isn’t as much coordination on who chases what? Is there chaser etiquette I’m missing?
 
See you there,
 
--
Michael West
https://mwe.st
 

From: GPSL@... [mailto:GPSL@...] On Behalf Of Michael Hojnowski kd2eat@... [GPSL]
Sent: Saturday, April 15, 2017 9:41 AM
To: Group GPSL
Subject: [GPSL] Does anyone need chase vehicle help at GPSL?
 
 
Hey Gang,

I'll be attending GPSL. I'm up in the air, so to speak, as to whether I
want to launch a balloon, or just help someone who needs foxhunting
assistance. I'll have my fully equipped 4wd chase vehicle along with
APRS, Laptop, aprsisce, etc. I'll have room for up to 3 passengers, if
anyone wants to ride along.

If someone wanted to launch, but was concerned about a chase vehicle, I
may be your guy. If i don't have any takers, I'll plan to launch a
simple payload of my own, just so we can fill the sky with balloons.
Regardless, I'm planning to launch another WSPR pico this year.

If interested in a chase assistance, please let me know in the next few
days, so I can register and request (or not) hydrogen.

Thanks,
Mike / KD2EAT


Re: Does anyone need chase vehicle help at GPSL?

Mark Conner N9XTN
 

Hi Mike,

The main "chaser etiquette" item is to let the payload owner retrieve his/her payload unless otherwise arranged or there is an immediate safety issue (payload at risk of being damaged or causing damage if it stays where it is).  Most teams like to photograph the landing configuration.

73 de Mark N9XTN

On Sat, Apr 15, 2017 at 5:23 PM, Michael West michael@... [GPSL] <GPSL-noreply@...> wrote:


Hey Mike (and all),

 

KG5PVB and I will be attending for the first time, only planning to chase right now. From what I’ve heard, there isn’t as much coordination on who chases what? Is there chaser etiquette I’m missing?

 

See you there,

 

--

Michael West

https://mwe.st

 

From: GPSL@... [mailto:GPSL@...] On Behalf Of Michael Hojnowski kd2eat@... [GPSL]
Sent: Saturday, April 15, 2017 9:41 AM
To: Group GPSL <GPSL@...>
Subject: [GPSL] Does anyone need chase vehicle help at GPSL?

 

 

Hey Gang,

I'll be attending GPSL. I'm up in the air, so to speak, as to whether I
want to launch a balloon, or just help someone who needs foxhunting
assistance. I'll have my fully equipped 4wd chase vehicle along with
APRS, Laptop, aprsisce, etc. I'll have room for up to 3 passengers, if
anyone wants to ride along.

If someone wanted to launch, but was concerned about a chase vehicle, I
may be your guy. If i don't have any takers, I'll plan to launch a
simple payload of my own, just so we can fill the sky with balloons.
Regardless, I'm planning to launch another WSPR pico this year.

If interested in a chase assistance, please let me know in the next few
days, so I can register and request (or not) hydrogen.

Thanks,
Mike / KD2EAT




GPSL Update

Zack Clobes W0ZC
 

The Paypal requests for Friday's Symposium (including light breakfast snacks and catered BBQ lunch) have started going out.  The $40 only applies to those attending Friday's symposium - all other activities are free (or billed separately), but it is helpful for me to have head counts.

Please note that all other food is payable directly to the restaurant.  Friday night's dinner will be held in a private dining room and is $30 per attendee (includes dinner, drink, dessert, and gratuity).

I need to verify a number on the hydrogen orders tomorrow, and then I'll be sending out the requests for gas promptly.

I appreciate the pre-payment for Friday's attendance.  Gas pre-payment is required as it is non-refundable.


The current attendee list is now published.  




Look for a balloon list to be published this week, including time slotting information.


It's getting close!!!


Zack Clobes, W0ZC
Project: Traveler
www.projecttraveler.org

Join us on Facebook for the latest information:



Project: Traveler is a research project of Custom Digital Services, LLC.



Balloon Flights

Zack Clobes W0ZC
 

I've started sketching out a list of balloon flights based on the information that I have.  If any of you can send me specifics for your flight, or if I've missed anyone, please contact me.



I'd like to know what transmitters are on board, the mode, frequency, and the callsign used including SSID.




Zack Clobes, W0ZC
Project: Traveler
www.projecttraveler.org

Join us on Facebook for the latest information:



Project: Traveler is a research project of Custom Digital Services, LLC.

Re: Balloon Flights

Mark Conner N9XTN
 

​For NSTAR, N9XTN-11 will be on 144.34 MHz with APRS and N9XTN-12 will be on 144.39 MHz with APRS.  At present I'm not planning any other RF payloads.

I think we're agreeing that 144.39 beacons will not be time-slotted?  I plan to do an odd interval so that we don't have persistent collisions by accident.

Also, it might be nice to agree on a UHF frequency (repeater or simplex) for mutual aid during recovery.  UHF is preferred so our voice TX doesn't desense APRS RX.

73 de Mark N9XTN​


On Thu, Apr 27, 2017 at 10:20 PM, Zack Clobes zclobes@... [GPSL] <GPSL-noreply@...> wrote:


I've started sketching out a list of balloon flights based on the information that I have.  If any of you can send me specifics for your flight, or if I've missed anyone, please contact me.



I'd like to know what transmitters are on board, the mode, frequency, and the callsign used including SSID.




Zack Clobes, W0ZC
Project: Traveler
www.projecttraveler.org

Join us on Facebook for the latest information:



Project: Traveler is a research project of Custom Digital Services, LLC.




Re: Balloon Flights

Nick
 

Hi Zack,

 

For GPSL EOSS will be flying one balloon (EOSS-252) with two beacons.  The first is AE0SS-12 and it will be transmitting an APRS beacon on 144.34 MHz.  The second is KE0BMV-11 and it will be transmitting an APRS beacon on 149.95 MHz.  The beacon burst is preceded by a 25 second tone used for DF’ing.

 

73,

Nick, NØLP

 

From: GPSL@... [mailto:GPSL@...] On Behalf Of Zack Clobes zclobes@... [GPSL]
Sent: Thursday, April 27, 2017 21:20
To: Group GPSL
Subject: [GPSL] Balloon Flights

 

 

I've started sketching out a list of balloon flights based on the information that I have.  If any of you can send me specifics for your flight, or if I've missed anyone, please contact me.

 

 

 

I'd like to know what transmitters are on board, the mode, frequency, and the callsign used including SSID.

 

 

 

 

Zack Clobes, W0ZC
Project: Traveler
www.projecttraveler.org

 

Join us on Facebook for the latest information:

 

 

 

Project: Traveler is a research project of Custom Digital Services, LLC.

 

Re: Balloon Flights

Nick
 

Zack,

 

Wrote too quickly about our beacon arrangement.  Delete all.  New email in work.

 

Nick

 

From: Nick [mailto:ndhanks@...]
Sent: Saturday, April 29, 2017 08:54
To: 'Zack Clobes'
Cc: 'GPSL@...'
Subject: RE: [GPSL] Balloon Flights

 

Hi Zack,

 

For GPSL EOSS will be flying one balloon (EOSS-252) with two beacons.  The first is AE0SS-12 and it will be transmitting an APRS beacon on 144.34 MHz.  The second is KE0BMV-11 and it will be transmitting an APRS beacon on 149.95 MHz.  The beacon burst is preceded by a 25 second tone used for DF’ing.

 

73,

Nick, NØLP

 

From: GPSL@... [mailto:GPSL@...] On Behalf Of Zack Clobes zclobes@... [GPSL]
Sent: Thursday, April 27, 2017 21:20
To: Group GPSL
Subject: [GPSL] Balloon Flights

 

 

I've started sketching out a list of balloon flights based on the information that I have.  If any of you can send me specifics for your flight, or if I've missed anyone, please contact me.

 

 

 

I'd like to know what transmitters are on board, the mode, frequency, and the callsign used including SSID.

 

 

 

 

Zack Clobes, W0ZC
Project: Traveler
www.projecttraveler.org

 

Join us on Facebook for the latest information:

 

 

 

Project: Traveler is a research project of Custom Digital Services, LLC.

 

Balloon to Balloon Cross Band Repeater

AE5IB (Kip)
 

A number of us in Texas will not make it this year. :(


But we would like to participate. We are wondering if anyone would be interested in a balloon-to-balloon relay/crossband repeater?


The idea is to launch a balloon in Texas at the same time as one at GPSL. And both have equipment to transmit and relay messages between them. 


The details are fuzzy at the moment, but we can work it out. 


I know our 1W balloon APRS packets have been picked up by stations in Kansas City, according to aprs.fi so it might be fun to see if we can relay voice through two balloons. 

Anyone up for it?


Kip

AE5IB

Helium Article in Chemistry World

L. Paul Verhage KD4STH
 

It's good to use hydrogen. We get an extra 8% more lift, save money, and conserve helium.