Date   

Re: Kaymont Balloons.

Steve G8KHW / AJ4XE
 

The TX range are designed for lower temperatures (than the standard TA range) - but they are still primarily a Latex balloon - just a different set of additives gives the their low temperature qualities.  Manufactures keep the additives used close to their chest.

    http://www.totex.jp/sub1.html    If you haven't already found it.

I've used TX-1500 in the past - they do seem to outperform TA-1500 (but not the HY-1600).

    Steve G8KHW

On 10/04/2022 15:27, Joe WB9SBD wrote:
Kaymont Balloons.
(TOTEX)
Say the TX-1500,
Does anyone have a exact as possible of what these balloons are made of?

My experiment last night had very surprising result, and I need to learn what these balloons are actually made of to determine why, what happened actually did happen.

Joe WB9SBD
Near Space Sciences

Virus-free. www.avg.com


Kaymont Balloons.

Joe WB9SBD
 

Kaymont Balloons.
(TOTEX)
Say the TX-1500,
Does anyone have a exact as possible of what these balloons are made of?

My experiment last night had very surprising result, and I need to learn what these balloons are actually made of to determine why, what happened actually did happen.

Joe WB9SBD
Near Space Sciences


Re: Very Successful Cornell High Altitude Balloon Launch 10/10/2021

Jeff Deaton
 

Wow!!  Very impressive, Mike!!  Love to see these sorts of videos.  

Great work over there in the NE.

-Jeff
N6BA


On Feb 22, 2022, at 10:14 AM, Garrett, Mark <ma-garrett@...> wrote:


Great video and production and look forward to the next flight there Mike.  Keep us posted.

OK to share this post?

Mark


On Tue, Feb 22, 2022 at 10:58 AM Michael Hojnowski <kd2eat@...> wrote:
Gang,

I realize I was remiss in sending a final follow-up of this flight. The
Alpha Cubesat team put together a fantastic 7 minute video discussing
their project, and our flight last October.   We'll be doing a 4th
flight, in the late Spring, attempting to deploy their solar sail from
an actual cubesat, rather than a mock-up.  Enjoy:
     https://www.youtube.com/watch?v=f2Yr6wClByc

Mike / KD2EAT
Advisor, Amateur Radio Club at Cornell University






--
Mark Garrett
Chief Engineer
Tri States Public Radio
WIUM Macomb, IL
WIUW Warsaw, IL
WVKC Galesburg, IL
K292GR Burlington, IA


Any HAB clubs in Oklahoma or Missouri?

Jason Unwin
 

I was wondering if there's any HAB clubs/organizations in Oklahoma or Missouri.  I participated in some flights with PARK a few years ago and chase crew with EOSS. I am in Civil Air Patrol and would like to get cadets and schools involved in the activity. Thanks. 


Re: Very Successful Cornell High Altitude Balloon Launch 10/10/2021

Garrett, Mark
 

Great video and production and look forward to the next flight there Mike.  Keep us posted.

OK to share this post?

Mark


On Tue, Feb 22, 2022 at 10:58 AM Michael Hojnowski <kd2eat@...> wrote:
Gang,

I realize I was remiss in sending a final follow-up of this flight. The
Alpha Cubesat team put together a fantastic 7 minute video discussing
their project, and our flight last October.   We'll be doing a 4th
flight, in the late Spring, attempting to deploy their solar sail from
an actual cubesat, rather than a mock-up.  Enjoy:
     https://www.youtube.com/watch?v=f2Yr6wClByc

Mike / KD2EAT
Advisor, Amateur Radio Club at Cornell University






--
Mark Garrett
Chief Engineer
Tri States Public Radio
WIUM Macomb, IL
WIUW Warsaw, IL
WVKC Galesburg, IL
K292GR Burlington, IA


Re: Very Successful Cornell High Altitude Balloon Launch 10/10/2021

Michael Hojnowski
 

Gang,

I realize I was remiss in sending a final follow-up of this flight. The Alpha Cubesat team put together a fantastic 7 minute video discussing their project, and our flight last October.   We'll be doing a 4th flight, in the late Spring, attempting to deploy their solar sail from an actual cubesat, rather than a mock-up.  Enjoy:
    https://www.youtube.com/watch?v=f2Yr6wClByc

Mike / KD2EAT
Advisor, Amateur Radio Club at Cornell University


Re: This year's GPSL

L. Paul Verhage KD4STH
 

Bill was working something out. My understanding is were still planning to go to the Spaceport in Indiana.


On Sun, Feb 13, 2022, 7:36 AM Jerry via groups.io <jerrygable=yahoo.com@groups.io> wrote:
I didn't see a response to this.  Are plans being made for this year's GPSL?


Jerry



On Sunday, February 6, 2022, 11:15:43 AM MST, Jerry Gable <jerrygable@...> wrote:


Are there any plans yet for GPSL?  I know the planned host Brian Tanner of Spaceport passed away so that certainly put things up in the air.  It also looks like Covid MIGHT give us a break this summer so in person could be a possibility this year.

Thanks,
Jerry


Re: This year's GPSL

Jerry
 

I didn't see a response to this.  Are plans being made for this year's GPSL?


Jerry



On Sunday, February 6, 2022, 11:15:43 AM MST, Jerry Gable <jerrygable@...> wrote:


Are there any plans yet for GPSL?  I know the planned host Brian Tanner of Spaceport passed away so that certainly put things up in the air.  It also looks like Covid MIGHT give us a break this summer so in person could be a possibility this year.

Thanks,
Jerry


This year's GPSL

Jerry
 

Are there any plans yet for GPSL?  I know the planned host Brian Tanner of Spaceport passed away so that certainly put things up in the air.  It also looks like Covid MIGHT give us a break this summer so in person could be a possibility this year.

Thanks,
Jerry


Day vs night

Joe WB9SBD
 

It's been a LONG time.

I da oldem days we always thought that the difference in "Lift" at day vs night was about 10%.

In other words at sundown you loose about 10% of your lift.

and at the other end at sun rise you gain about 10%

Has this been revised since back in the 80's & 90's when we thought this was fact?

Joe WB9SBD


Re: Permission to show your callsign on a TV program.

Shane Wilson
 

Fine with me!

Shane Wilson, N4XWC

On 12/8/2021 6:52, Steve G8KHW / AJ4XE wrote:
A Japanese TV company (One by One) have approached me** to help get permission to show the Habitat tracker screens on a TV program.  I can't see a problem with the screens per-se (other than the usual Google Maps issues) but have agreed its wise to contact the owner of any balloon displayed - Just to ensure they are happy to have their callsign shown on TV.

If your callsign is in the following list please let me know if you are happy (or not) to have your balloon shown.  If you have a balloon in the air (or plan to have one in the next few days) and your callsign is not in the list (and would appear on the Habitat tracker) then let me know.

W3UAV
M1KEL
VE3KCL
WB0URW
NOB8/NOB9
NU6XB
N4XWC
KK6MRI
KD4FOU
SA6BSS
B69 / M0XER
DG4NOB
SP5LOT
ICSPACE
K9FRD
SP0UOB
SP3IZN

     Steve G8KHW / AJ4XE

** They approached me because I was an organizer of the last UKHAS conference.


Permission to show your callsign on a TV program.

Steve G8KHW / AJ4XE
 

A Japanese TV company (One by One) have approached me** to help get permission to show the Habitat tracker screens on a TV program.  I can't see a problem with the screens per-se (other than the usual Google Maps issues) but have agreed its wise to contact the owner of any balloon displayed - Just to ensure they are happy to have their callsign shown on TV.

If your callsign is in the following list please let me know if you are happy (or not) to have your balloon shown.  If you have a balloon in the air (or plan to have one in the next few days) and your callsign is not in the list (and would appear on the Habitat tracker) then let me know.

W3UAV
M1KEL
VE3KCL
WB0URW
NOB8/NOB9
NU6XB
N4XWC
KK6MRI
KD4FOU
SA6BSS
B69 / M0XER
DG4NOB
SP5LOT
ICSPACE
K9FRD
SP0UOB
SP3IZN

     Steve G8KHW / AJ4XE

** They approached me because I was an organizer of the last UKHAS conference.


--
This email has been checked for viruses by AVG.
https://www.avg.com


Re: Flight Predictor Page?

Joe WB9SBD
 

WOW!

On 12/5/2021 10:23 AM, Jerry via groups.io wrote:
Habhub grabs the data for the entire earth 4 times a day.  That has a 1 degree resolution.  Then they interpolate between time, altitude, long, and lat to come up with the wind at the current balloon time and location.  We have come a long way from grabbing wind at single location.

I go through the calculations they use in my presentation https://www.dropbox.com/s/zh4i2hmftxm2l4l/FlightPredictionSoftwareOverview.pdf?dl=0

Jerry



On Sunday, December 5, 2021, 07:56:29 AM MST, Joe WB9SBD <nss@...> wrote:


I tried that one, it seems to work,
almost seems too simple!

I guess from the launch location, it is smart enough to know what sonde data to grab?

I remember the old days where I had to go and get that data myself and paste it into something he hhe.

Joe WB9SBD

On 12/5/2021 8:25 AM, Garrett, Mark wrote:
I find this on-line prediction to be somewhat reasonable when it comes to Radiosondes.


On Sat, Dec 4, 2021 at 5:44 PM Joe WB9SBD <nss@...> wrote:
What now days is the best flight prediction page calculator now days?

joe WB9SBD



--
Mark Garrett
Tri States Public Radio
WIUM Macomb, IL
WIUW Warsaw, IL
WVKC Galesburg, IL
K292GR Burlington, IA




Re: Flight Predictor Page?

Jerry
 

Habhub grabs the data for the entire earth 4 times a day.  That has a 1 degree resolution.  Then they interpolate between time, altitude, long, and lat to come up with the wind at the current balloon time and location.  We have come a long way from grabbing wind at single location.

I go through the calculations they use in my presentation https://www.dropbox.com/s/zh4i2hmftxm2l4l/FlightPredictionSoftwareOverview.pdf?dl=0

Jerry



On Sunday, December 5, 2021, 07:56:29 AM MST, Joe WB9SBD <nss@...> wrote:


I tried that one, it seems to work,
almost seems too simple!

I guess from the launch location, it is smart enough to know what sonde data to grab?

I remember the old days where I had to go and get that data myself and paste it into something he hhe.

Joe WB9SBD

On 12/5/2021 8:25 AM, Garrett, Mark wrote:
I find this on-line prediction to be somewhat reasonable when it comes to Radiosondes.


On Sat, Dec 4, 2021 at 5:44 PM Joe WB9SBD <nss@...> wrote:
What now days is the best flight prediction page calculator now days?

joe WB9SBD



--
Mark Garrett
Tri States Public Radio
WIUM Macomb, IL
WIUW Warsaw, IL
WVKC Galesburg, IL
K292GR Burlington, IA



Re: Flight Predictor Page?

Joe WB9SBD
 

I tried that one, it seems to work,
almost seems too simple!

I guess from the launch location, it is smart enough to know what sonde data to grab?

I remember the old days where I had to go and get that data myself and paste it into something he hhe.

Joe WB9SBD

On 12/5/2021 8:25 AM, Garrett, Mark wrote:
I find this on-line prediction to be somewhat reasonable when it comes to Radiosondes.


On Sat, Dec 4, 2021 at 5:44 PM Joe WB9SBD <nss@...> wrote:
What now days is the best flight prediction page calculator now days?

joe WB9SBD



--
Mark Garrett
Tri States Public Radio
WIUM Macomb, IL
WIUW Warsaw, IL
WVKC Galesburg, IL
K292GR Burlington, IA



Re: Flight Predictor Page?

Garrett, Mark
 

I find this on-line prediction to be somewhat reasonable when it comes to Radiosondes.


On Sat, Dec 4, 2021 at 5:44 PM Joe WB9SBD <nss@...> wrote:
What now days is the best flight prediction page calculator now days?

joe WB9SBD



--
Mark Garrett
Tri States Public Radio
WIUM Macomb, IL
WIUW Warsaw, IL
WVKC Galesburg, IL
K292GR Burlington, IA


Re: Flight Predictor Page?

Jerry
 

Looks like mine (https://s3research.com/tools/flightpredictor/)  isn't working right now.  It looks like the weather file has a change that is breaking it.  I can fix it if anyone wants to use it.

At GPSL 2017 I did a comparison of the various tools and how they work.  You can find the presentation here: https://www.dropbox.com/s/zh4i2hmftxm2l4l/FlightPredictionSoftwareOverview.pdf?dl=0

The basic conclusion was that they all use about the same weather data and calculations.  You get almost identical results from the tools I looked at.  

Habhub seems to be the tool of choice these days. 


Jerry



On Saturday, December 4, 2021, 04:44:20 PM MST, Joe WB9SBD <nss@...> wrote:


What now days is the best flight prediction page calculator now days?

joe WB9SBD


Flight Predictor Page?

Joe WB9SBD
 

What now days is the best flight prediction page calculator now days?

joe WB9SBD


Re: Like to track balloons? How about tracking radiosondes!

Barry L. Lankford
 

On 11/24/2021 8:08 PM, Hank Riley via groups.io wrote:
What a kick this is.  There are many newer (presumably better) versions of this original Yagi Cad 4.1 program from the author Paul of Australia.  They're ALL there including the very first version, *4.2*, done in Quick Basic.
Read the history to find out how the */name/* 4.1 came about (it wasn't from Paul!) and other interesting tidbits, especially to the software writers on the GPSL list.
http://www.yagicad.com/yagicad/YagiCAD.htm
Hank,

I agree, and thanks for that link. At my age, and while I was composing my previous email in this thread, it occurred to me that I ought to do a search for YagiCad's author by his name, but by the time I finished the email, that thought had evaporated from my mind. I've bookmarked the link, and color-tagged your email.

I may never get around to making another tape measure Yagi, but I'll enjoy reading (and thinking) about the kinds of antennas that could be made that way.

I've been wondering if some similar techniques could be used to make a PVC and tape measure LOG PERIODIC DIPOLE ARRAY! I've also been thinking about an easy way to make DIY radomes for antenna ideas that might be hard to weather-proof, such as Kent Britain's (WA5VJB) PCB LPDA antennas.

I hope I can eventually locate my old CAD drawings for the way I modified the PVC backbone of my antennas. With a little strategically placed RTV, they could probably be made to survive well outdoors. In the past, I kept my Icom IC-R3 plugged into a power adapter and turned ON continuously, with my 403 MHz antenna (all of this was indoors), pointed towards the university's launch site, so any time they launched a WX balloon, I got a quick warning (leave the R3's volume turned way up!).

By the way, in the photos with my previous email, attached to each antenna is a snap-on mast adapter made up of a modified PVC Tee, some tie-wraps, a couple of short lengths of 1/2" PVC pipe and a PVC 90 deg. elbow that allows me to orient the antenna on a 1/2" PVC pipe mast for either vertical or horizontal polarization. The PVC pipe mast was attached to a ceiling joist in the garage or one of the corner posts of a welded-wire shelving unit in a storage bedroom. Very convenient. Oh, one other thing: the short PVC pipe pieces and 90 deg. elbow were only used when the antenna also needed an "elevation" setting (other than horizontal). I used that capability for satellites a few times.

Raspberry Pis, APRS and SDR software, and DVB-T dongles weren't "a thing" back then, just 15 to 20 years ago, but now it's so easy to put a tracking symbol up on APRS maps like aprs.fi, when a WX balloon launch is detected. Those fairly recently available things lead to even more ideas:

For example, A Raspberry Pi HQ camera coupled with a C-mount to T-mount adapter to an inexpensive and very common, 135mm telephoto lens (left over from your old 35mm film SLR) gives you a 17X telephoto Hi-Def IP streaming video camera, a near ideal optical power for seeing HABs at altitude. With some easily available hardware from the DIY 3D printer market, and some high school solid geometry (I've done that), you could have an auto-tracking video camera tracking and streaming live video of any passing HABs and radiosonde balloons. What a science-fair project that would be for some high school kid!

Barry
N4MSJ

_______________________________________________________________
On Wednesday, November 24, 2021, 08:03:51 PM EST, Barry L. Lankford wrote:
 There's still a current website that has what appears to be the original WB2HOL design,
although I think some of the links may be dead, particularly the onesfor the YAGI-CAD41 program:

> http://theleggios.net/wb2hol/projects/rdf/tape_bm.htm
I was able to find the Zip file for Yagi-Cad on one of my old hard
drives, but I recall that the program had some issues even then with the
then-current version of MS-DOS (Yes, that's right, YagiCad runs in
MS-DOS, NOT Windows!).  I wouldn't even think about trying to run it
with Win10's DOS window!
_._,_._,_
------------------------------------------------------------------------


Re: Like to track balloons? How about tracking radiosondes!

James Ewen VE6SRV
 

Back in my day, you had to lay on the lawn with your yagi sweeping the sky for the signal, and then use RDF techniques to chase down the payload. (Do I sound like one of those old timer ham radio guys yet?)

Before the turn of the century, I got it into my head that chasing balloons would be fun. I just happen to live 60 km due east of the local weather station WHK. Prevailing winds tend to put the flight path right overhead. We went for a tour and watched the meteorologist fill and launch a radiosonde. Then I started tracking the 400 MHz payloads using my IC-24AT and a UHF yagi antenna. I would lay on the lawn sweeping the yagi around looking for the signal. I had just moved into town and the neighbors didn't really know what to think of the nutty neighbor laying on the lawn with a tiny goofy looking ladder in his hands. The curious ones would get to stare into the blue sky and if they were lucky enough to have good eyesight, they would see the balloon flying overhead.

I soon learnt just where I would like to see the balloon burst in order to determine whether I wanted to go chase down the payload or not. Based on where the balloon was visually observed to burst, I would have a rough idea of where I needed to head to intercept the payload. Years later as the prediction software got better, we were able to determine where to head before launch, but I could still get a rough idea of where to head if I could observe the burst. Even if telemetry failed, we could get close enough to track down the RF signals.

Decoding GPS signals from the radiosondes makes it like shooting fish in a barrel! I might have to hook my SDR up to one of my old Pi3s and see what I can decode. Then I might have to go collect a bunch of radiosondes...

James
VE6SRV

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