Date   
Unwinder Design

Steve G8KHW / AJ4XE
 

Hi folks - I'm looking for a home-brew unwinder (AKA dereeler) design - I've got a launch to do with a limited launch area and I really need to use an unwinder.

Ive seen the designs for the Vaisala and Graw types:

https://thumbs.worthpoint.com/zoom/images2/1/1211/08/radiosondes-graw-wettersonde-vaisala_1_3e397dd9892d5593c9e63aaa15175970.jpg

https://www.vaisala.com/sites/default/files/styles/product_main/public/images/PROD-RS41-1280x960.jpg?itok=OVS1SLYA

https://www.graw.de/fileadmin/cms_upload/Images/Unwinder_UW2_1024x768_72dpi.png

https://www.graw.de/fileadmin/cms_upload/Images/Unwinder_UW1_1024x768_72dpi.png

My first attempt to make my own was a bit of a failure.   Any sure fire, simple designs out there?   My payload is about 100g (3.5 oz)

    Steve G8KHW / AJ4XE







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Re: KF4ZTI11 latex floater heading across Arkansas tonight

Tim C KC8ZNJ
 

This might be of interest.  


I have not checked in on WorldView Enterprise in a couple of years.    They were having a lot of trouble with their Safety assessments and obtaining a launch license for their human project (Voyager) to carry people up to the Edge of Space on a balloon and have them parachute back down in a pod. 

It seems they have shifted gears towards surveillance efforts... Keep your eyes to the sky this summer they are sending up a network of balloons soon. 

 

cheers! 


On Fri, Jun 19, 2020 at 3:21 AM Steve G8KHW / AJ4XE <steve@...> wrote:

Cross posted from [picoballoon] - given recent UFO interest:

    https://www.india.com/viral/ufo-or-weather-balloon-mysterious-balloon-like-white-object-spotted-in-japans-sky-twitter-is-bewildered-4062181/

 Steve


On 18/06/2020 03:48, James Ewen VE6SRV wrote:
Margie,

How did you establish an altitude of 2900 feet? I’m assuming AGL as well. 

At that altitude, one could easily tether a balloon, and it would be able to stay in a fixed location for a long duration. 

If you have a specific article to reference, it would be best to provide a link to the article instead of a website. 

I did go to the media page, but I’m not searching for an unknown article. 

The images on the top of the page caught my eye. Not sure what the top one was, but the middle one looks like a cloud. The bottom one looks like a blurry picture of a weather balloon. 

I know what blurry pictures of weather balloons look like. I have taken quite a few trying to get images of flights I have participated in. 

Our latex flights, and the hundreds of flights launched by the weather service can look fairly interesting, and can raise eyebrows if you happen to see one without knowing what it is. 

Little white dots, and not so little white dots in the sky can attract attention. 

I personally have seen hundreds of UFOs in my lifetime. Most of them I have been able to determine to be airplanes after short duration of observation. Then there are the little lights zipping across the sky at night. those can be identified using satellite tracking software. I especially liked seeing the iridium flares. The high magnitude flares can be pretty amazing. 

Everything can be unidentified until you figure out what it is. Sometimes it’s easier to identify than other times. 

I think most who have responded thought that you were wanting to fly your MADAR unit under a balloon at altitude, in a stationary position for observational readings. 

That might cause more problems for your cohorts as more UFO observations might be triggered by a flight of this sort!

Keep your eyes on the skies!

James
VE6SRV

On Wed, Jun 17, 2020 at 7:45 PM Margie Kay <momufonasd@...> wrote:
I should have mentioned that the altitude was 2,900 feet. And there were two or three objects which stayed the same distance apart the entire time. For more info see my article under the media page at www.missourimufon.org.  

On Wed, Jun 17, 2020 at 10:50 AM Steve G8KHW / AJ4XE <steve@...> wrote:

humm - read "in" as inches missed the almost invisible '

    Steve

On 17/06/2020 13:19, Zack Clobes W0ZC wrote:
Her question was about a 30 foot (~10 meters) balloon, not inches.



Zack

On Wed, Jun 17, 2020, 4:11 AM Steve G8KHW / AJ4XE <steve@...> wrote:

Its possible but quite unlikely I think - 30in balloons (I assume you are talking about the variety used for floater flights with payloads of a few grams) usually float about 8,000m (25,000ft) - about the 350mBar layer in the atmosphere - this is quite an active layer:

    https://earth.nullschool.net/#current/wind/isobaric/250hPa/orthographic=-92.78,37.08,432

    https://earth.nullschool.net/#current/wind/isobaric/500hPa/orthographic=-92.78,37.08,432

The shape of the balloon will have very little impact on the drift (if any at all).

    Steve G8KHW


On 16/06/2020 23:15, Margie Kay wrote:
I have a question for you balloon experts - I am a MUFON investigator and am wondering if it is possible for a balloon 30' in diameter to be shaped like a flat donut and stay in the same location and altitude for over six hours?

I appreciate your comments.

P.S. I'm setting up my MADAR unit in Independence, Missouri tonight if I can figure it out!

Sincerely, 

On Sat, Jun 13, 2020 at 9:23 PM Bill Brown via groups.io <wb8elk=aol.com@groups.io> wrote:
KF4ZTI-11 was launched this morning (Saturday) from Clarksville TN with just one pound of payload attached. GoPro type camera and an APRS tracker. It transmits every 1 minute on 144.39 and then 10 seconds later on 144.34 MHz...This payload sat in a tree for a week or two last year and saw quite a bit of weather. As a result the transmit frequency has shifted to 144.348 MHz on APRS as well as 144.398 MHz when it gets below -20 C...As a result it is out of the passband for most digipeaters. I am still copying it here in Huntsville AL from 220 miles out but is about out of range for me. Is there someone in the St. Louis, Kansas City, Little Rock, Memphis or east OK or NE TX that can set up an iGate tuned to 144.348 MHz tonight? If you already have an iGate, can you tune it to 144.398 or 144.348 MHz? This is an unplanned latex floater due to KF4ZTI putting in only a few ounces of positive lift on a 1200 gram balloon. It floated all day around 107000 feet but is descending after sunset...probably will level out around 90,000 feet and continue on west across Arkansas tonight.

- Bill WB8ELK




--
Margie Kay
Missouri MUFON Assistant State Director
www.missourimufon.org
MUFON Star Team
Kansas City, Missouri
816-833-1602 (office)



AVG logo

This email has been checked for viruses by AVG antivirus software.
www.avg.com




--
Margie Kay
Missouri MUFON Assistant State Director
www.missourimufon.org
MUFON Star Team
Kansas City, Missouri
816-833-1602 (office)
--
James
VE6SRV

Re: KF4ZTI11 latex floater heading across Arkansas tonight

Steve G8KHW / AJ4XE
 

On 18/06/2020 03:48, James Ewen VE6SRV wrote:
Margie,

How did you establish an altitude of 2900 feet? I’m assuming AGL as well. 

At that altitude, one could easily tether a balloon, and it would be able to stay in a fixed location for a long duration. 

If you have a specific article to reference, it would be best to provide a link to the article instead of a website. 

I did go to the media page, but I’m not searching for an unknown article. 

The images on the top of the page caught my eye. Not sure what the top one was, but the middle one looks like a cloud. The bottom one looks like a blurry picture of a weather balloon. 

I know what blurry pictures of weather balloons look like. I have taken quite a few trying to get images of flights I have participated in. 

Our latex flights, and the hundreds of flights launched by the weather service can look fairly interesting, and can raise eyebrows if you happen to see one without knowing what it is. 

Little white dots, and not so little white dots in the sky can attract attention. 

I personally have seen hundreds of UFOs in my lifetime. Most of them I have been able to determine to be airplanes after short duration of observation. Then there are the little lights zipping across the sky at night. those can be identified using satellite tracking software. I especially liked seeing the iridium flares. The high magnitude flares can be pretty amazing. 

Everything can be unidentified until you figure out what it is. Sometimes it’s easier to identify than other times. 

I think most who have responded thought that you were wanting to fly your MADAR unit under a balloon at altitude, in a stationary position for observational readings. 

That might cause more problems for your cohorts as more UFO observations might be triggered by a flight of this sort!

Keep your eyes on the skies!

James
VE6SRV

On Wed, Jun 17, 2020 at 7:45 PM Margie Kay <momufonasd@...> wrote:
I should have mentioned that the altitude was 2,900 feet. And there were two or three objects which stayed the same distance apart the entire time. For more info see my article under the media page at www.missourimufon.org.  

On Wed, Jun 17, 2020 at 10:50 AM Steve G8KHW / AJ4XE <steve@...> wrote:

humm - read "in" as inches missed the almost invisible '

    Steve

On 17/06/2020 13:19, Zack Clobes W0ZC wrote:
Her question was about a 30 foot (~10 meters) balloon, not inches.



Zack

On Wed, Jun 17, 2020, 4:11 AM Steve G8KHW / AJ4XE <steve@...> wrote:

Its possible but quite unlikely I think - 30in balloons (I assume you are talking about the variety used for floater flights with payloads of a few grams) usually float about 8,000m (25,000ft) - about the 350mBar layer in the atmosphere - this is quite an active layer:

    https://earth.nullschool.net/#current/wind/isobaric/250hPa/orthographic=-92.78,37.08,432

    https://earth.nullschool.net/#current/wind/isobaric/500hPa/orthographic=-92.78,37.08,432

The shape of the balloon will have very little impact on the drift (if any at all).

    Steve G8KHW


On 16/06/2020 23:15, Margie Kay wrote:
I have a question for you balloon experts - I am a MUFON investigator and am wondering if it is possible for a balloon 30' in diameter to be shaped like a flat donut and stay in the same location and altitude for over six hours?

I appreciate your comments.

P.S. I'm setting up my MADAR unit in Independence, Missouri tonight if I can figure it out!

Sincerely, 

On Sat, Jun 13, 2020 at 9:23 PM Bill Brown via groups.io <wb8elk=aol.com@groups.io> wrote:
KF4ZTI-11 was launched this morning (Saturday) from Clarksville TN with just one pound of payload attached. GoPro type camera and an APRS tracker. It transmits every 1 minute on 144.39 and then 10 seconds later on 144.34 MHz...This payload sat in a tree for a week or two last year and saw quite a bit of weather. As a result the transmit frequency has shifted to 144.348 MHz on APRS as well as 144.398 MHz when it gets below -20 C...As a result it is out of the passband for most digipeaters. I am still copying it here in Huntsville AL from 220 miles out but is about out of range for me. Is there someone in the St. Louis, Kansas City, Little Rock, Memphis or east OK or NE TX that can set up an iGate tuned to 144.348 MHz tonight? If you already have an iGate, can you tune it to 144.398 or 144.348 MHz? This is an unplanned latex floater due to KF4ZTI putting in only a few ounces of positive lift on a 1200 gram balloon. It floated all day around 107000 feet but is descending after sunset...probably will level out around 90,000 feet and continue on west across Arkansas tonight.

- Bill WB8ELK




--
Margie Kay
Missouri MUFON Assistant State Director
www.missourimufon.org
MUFON Star Team
Kansas City, Missouri
816-833-1602 (office)



AVG logo

This email has been checked for viruses by AVG antivirus software.
www.avg.com




--
Margie Kay
Missouri MUFON Assistant State Director
www.missourimufon.org
MUFON Star Team
Kansas City, Missouri
816-833-1602 (office)
--
James
VE6SRV

Re: Photos from first GPSL (2001)

Hank Riley
 

Back in the day!    Sigh.

I was just looking at the special webage I created to welcome Weatherwise readers to my HABLIC (High Altitude Balloon Launch Information Center) website.

The Weatherise article generated quite a bit of traffic to HABLIC and through independent tracking that I had installed, it was apparent exactly who and how many (for some of the visitors) were coming direct from Weatherise.

HABLIC was the internet's first website that listed balloon launches from around the US in one place.  "All balloon launches, all the time."  It had a consistent data format which started even before the advent of the website and before even the web itself for that matter.  So before the web there was plain text email and Usenet.

Most of HABLIC exists today archived by several web legacy sites.  In its lifetime it logged over 25,000 hits and really went nuts when it was mentioned in a QST article.  I think that set a 24 hour record of something like 1000 hits!
__________________________________________________________________________


On Thursday, June 18, 2020,  Paul wrote:

We did that launch for WeatherWise magazine.

Re: Photos from first GPSL (2001)

L. Paul Verhage KD4STH
 

Man, 19 years ago. Back when helium was cheap and I lots more hair that wasn't gray.

We did that launch for WeatherWise magazine.

On Thu, Jun 18, 2020, 3:29 PM Mark Conner N9XTN <mconner1@...> wrote:

This link may work better, the previous one may not have been a shareable link.  If this one doesn't work let me know.

73 de Mark N9XTN

On Thu, Jun 18, 2020 at 3:39 PM Mark Conner <mconner1@...> wrote:

We had three balloons launched for GPSL 2001.  We didn't have a symposium that year, that began in 2002.  Two of the flights were recovered that day - the tracker on the third flight failed, but was found by a farmer a few days later and returned.

73 de Mark N9XTN
 

Re: Photos from first GPSL (2001)

Hank Riley
 

This one is shareable.  The other wasn't.

Thanks for fixing the situation.


On Thursday, June 18, 2020, Mark wrote:


This link may work better, the previous one may not have been a shareable link. 

Re: Photos from first GPSL (2001)

Mark Conner N9XTN
 


This link may work better, the previous one may not have been a shareable link.  If this one doesn't work let me know.

73 de Mark N9XTN

On Thu, Jun 18, 2020 at 3:39 PM Mark Conner <mconner1@...> wrote:

We had three balloons launched for GPSL 2001.  We didn't have a symposium that year, that began in 2002.  Two of the flights were recovered that day - the tracker on the third flight failed, but was found by a farmer a few days later and returned.

73 de Mark N9XTN
 

Photos from first GPSL (2001)

Mark Conner N9XTN
 


We had three balloons launched for GPSL 2001.  We didn't have a symposium that year, that began in 2002.  Two of the flights were recovered that day - the tracker on the third flight failed, but was found by a farmer a few days later and returned.

73 de Mark N9XTN
 

GPSL 2020 registration

Mark Conner N9XTN
 

Just a reminder to please remember to register for GPSL 2020.  You can find the registration link at https://superlaunch.org about halfway down the page.  Registration is free but is required to receive the link to the Zoom sessions.

If you have a Twitter account, please follow @superlaunch also.  

73 de Mark N9XTN

Re: KF4ZTI11 latex floater heading across Arkansas tonight

James Ewen VE6SRV
 

Margie,

How did you establish an altitude of 2900 feet? I’m assuming AGL as well. 

At that altitude, one could easily tether a balloon, and it would be able to stay in a fixed location for a long duration. 

If you have a specific article to reference, it would be best to provide a link to the article instead of a website. 

I did go to the media page, but I’m not searching for an unknown article. 

The images on the top of the page caught my eye. Not sure what the top one was, but the middle one looks like a cloud. The bottom one looks like a blurry picture of a weather balloon. 

I know what blurry pictures of weather balloons look like. I have taken quite a few trying to get images of flights I have participated in. 

Our latex flights, and the hundreds of flights launched by the weather service can look fairly interesting, and can raise eyebrows if you happen to see one without knowing what it is. 

Little white dots, and not so little white dots in the sky can attract attention. 

I personally have seen hundreds of UFOs in my lifetime. Most of them I have been able to determine to be airplanes after short duration of observation. Then there are the little lights zipping across the sky at night. those can be identified using satellite tracking software. I especially liked seeing the iridium flares. The high magnitude flares can be pretty amazing. 

Everything can be unidentified until you figure out what it is. Sometimes it’s easier to identify than other times. 

I think most who have responded thought that you were wanting to fly your MADAR unit under a balloon at altitude, in a stationary position for observational readings. 

That might cause more problems for your cohorts as more UFO observations might be triggered by a flight of this sort!

Keep your eyes on the skies!

James
VE6SRV

On Wed, Jun 17, 2020 at 7:45 PM Margie Kay <momufonasd@...> wrote:
I should have mentioned that the altitude was 2,900 feet. And there were two or three objects which stayed the same distance apart the entire time. For more info see my article under the media page at www.missourimufon.org.  

On Wed, Jun 17, 2020 at 10:50 AM Steve G8KHW / AJ4XE <steve@...> wrote:

humm - read "in" as inches missed the almost invisible '

    Steve

On 17/06/2020 13:19, Zack Clobes W0ZC wrote:
Her question was about a 30 foot (~10 meters) balloon, not inches.



Zack

On Wed, Jun 17, 2020, 4:11 AM Steve G8KHW / AJ4XE <steve@...> wrote:

Its possible but quite unlikely I think - 30in balloons (I assume you are talking about the variety used for floater flights with payloads of a few grams) usually float about 8,000m (25,000ft) - about the 350mBar layer in the atmosphere - this is quite an active layer:

    https://earth.nullschool.net/#current/wind/isobaric/250hPa/orthographic=-92.78,37.08,432

    https://earth.nullschool.net/#current/wind/isobaric/500hPa/orthographic=-92.78,37.08,432

The shape of the balloon will have very little impact on the drift (if any at all).

    Steve G8KHW


On 16/06/2020 23:15, Margie Kay wrote:
I have a question for you balloon experts - I am a MUFON investigator and am wondering if it is possible for a balloon 30' in diameter to be shaped like a flat donut and stay in the same location and altitude for over six hours?

I appreciate your comments.

P.S. I'm setting up my MADAR unit in Independence, Missouri tonight if I can figure it out!

Sincerely, 

On Sat, Jun 13, 2020 at 9:23 PM Bill Brown via groups.io <wb8elk=aol.com@groups.io> wrote:
KF4ZTI-11 was launched this morning (Saturday) from Clarksville TN with just one pound of payload attached. GoPro type camera and an APRS tracker. It transmits every 1 minute on 144.39 and then 10 seconds later on 144.34 MHz...This payload sat in a tree for a week or two last year and saw quite a bit of weather. As a result the transmit frequency has shifted to 144.348 MHz on APRS as well as 144.398 MHz when it gets below -20 C...As a result it is out of the passband for most digipeaters. I am still copying it here in Huntsville AL from 220 miles out but is about out of range for me. Is there someone in the St. Louis, Kansas City, Little Rock, Memphis or east OK or NE TX that can set up an iGate tuned to 144.348 MHz tonight? If you already have an iGate, can you tune it to 144.398 or 144.348 MHz? This is an unplanned latex floater due to KF4ZTI putting in only a few ounces of positive lift on a 1200 gram balloon. It floated all day around 107000 feet but is descending after sunset...probably will level out around 90,000 feet and continue on west across Arkansas tonight.

- Bill WB8ELK




--
Margie Kay
Missouri MUFON Assistant State Director
www.missourimufon.org
MUFON Star Team
Kansas City, Missouri
816-833-1602 (office)



AVG logo

This email has been checked for viruses by AVG antivirus software.
www.avg.com




--
Margie Kay
Missouri MUFON Assistant State Director
www.missourimufon.org
MUFON Star Team
Kansas City, Missouri
816-833-1602 (office)

--
James
VE6SRV

Re: KF4ZTI 11 latex floater now over Tulsa OK

Bill Brown
 

Hi Mark,

  I also had it in the general area you calculated using similar estimates but thought it might be a bit south of the next road to the north and east of the north south road.

  I predicted it between a spot north of where the north-south road makes a big curve (N3380 and 885) on up to the next E-W road (Rd. 880) and just to the east of the N-S road (Rd N 3380).

- Bill WB8ELK




-----Original Message-----
From: Mark Conner N9XTN <mconner1@...>
To: GPSL@groups.io
Sent: Wed, Jun 17, 2020 3:38 pm
Subject: Re: [GPSL] KF4ZTI 11 latex floater now over Tulsa OK

Just for fun, I pulled the expected wind profile for the landing site for below 10,000 ft:
 PRESS HGT(MSL) TEMP DEW PT  WND DIR  WND SPD
 HPA       M      C     C       DEG     M/S
 E = Estimated Surface Height

  984.   302.E  31.0   16.5   187.5     6.1
  983.   312.E  30.0   15.5   187.4     5.9
  980.   339.E  29.3   15.4   187.1     6.9
  975.   388.E  28.7   14.8   186.0     7.4
  967.   462.E  27.9   14.1   186.1     7.8
  953.   589.E  26.5   12.9   185.0     8.3
  935.   758.E  25.0   11.5   185.0     8.7
  915.   947.E  23.2   10.8   184.2     9.1
  891.  1172.E  21.1   10.0   184.4     9.2
  867.  1405.E  19.3    5.2   185.1     9.2
  840.  1676.E  17.2    4.5   183.7     8.4
  810.  1990.E  15.8   -1.4   163.6     5.8
  776.  2347.E  14.6   -6.4   127.9     4.6
  740.  2742.E  11.9   -6.4   107.7     5.7
  702.  3179.E   8.7   -4.5    91.4     7.4
 
Not a lot of direction change below the last report, so I think Harry's assumption on course was good.  However, assuming a 700 fpm descent rate based on the last two reports and about 4000 ft from last report to touchdown, that yields about 345 seconds of flying, and at 7 meters/sec that would put the balloon about 2.4 km NNE of the last report.  That would put it to the north of "Dan" in the KML file, north of the next E/W road to the north a bit.  That doesn't agree with Rich's DF results though.
Anyway, if you're planning an aerial search, I think it'd be worth a look another 1/2 to 3/4 mile north to NNE of "Pred3".
73 de Mark N9XTN

On Wed, Jun 17, 2020 at 2:50 PM Harry M <hhm_74115@...> wrote:
I've attached a KML file with the last 3 known positions and my 3 predicted positions.
A placemark where Dan K5SEL heard it and 2 placemark where Rich KD5JXU heard it.
From RICH1 it was East and from RICH2 it was West.

Rich might have a chance to go Aeromobile this weekend and scope out the area.

Re: KF4ZTI11 latex floater heading across Arkansas tonight

Margie Kay
 

I should have mentioned that the altitude was 2,900 feet. And there were two or three objects which stayed the same distance apart the entire time. For more info see my article under the media page at www.missourimufon.org.  

On Wed, Jun 17, 2020 at 10:50 AM Steve G8KHW / AJ4XE <steve@...> wrote:

humm - read "in" as inches missed the almost invisible '

    Steve

On 17/06/2020 13:19, Zack Clobes W0ZC wrote:
Her question was about a 30 foot (~10 meters) balloon, not inches.



Zack

On Wed, Jun 17, 2020, 4:11 AM Steve G8KHW / AJ4XE <steve@...> wrote:

Its possible but quite unlikely I think - 30in balloons (I assume you are talking about the variety used for floater flights with payloads of a few grams) usually float about 8,000m (25,000ft) - about the 350mBar layer in the atmosphere - this is quite an active layer:

    https://earth.nullschool.net/#current/wind/isobaric/250hPa/orthographic=-92.78,37.08,432

    https://earth.nullschool.net/#current/wind/isobaric/500hPa/orthographic=-92.78,37.08,432

The shape of the balloon will have very little impact on the drift (if any at all).

    Steve G8KHW


On 16/06/2020 23:15, Margie Kay wrote:
I have a question for you balloon experts - I am a MUFON investigator and am wondering if it is possible for a balloon 30' in diameter to be shaped like a flat donut and stay in the same location and altitude for over six hours?

I appreciate your comments.

P.S. I'm setting up my MADAR unit in Independence, Missouri tonight if I can figure it out!

Sincerely, 

On Sat, Jun 13, 2020 at 9:23 PM Bill Brown via groups.io <wb8elk=aol.com@groups.io> wrote:
KF4ZTI-11 was launched this morning (Saturday) from Clarksville TN with just one pound of payload attached. GoPro type camera and an APRS tracker. It transmits every 1 minute on 144.39 and then 10 seconds later on 144.34 MHz...This payload sat in a tree for a week or two last year and saw quite a bit of weather. As a result the transmit frequency has shifted to 144.348 MHz on APRS as well as 144.398 MHz when it gets below -20 C...As a result it is out of the passband for most digipeaters. I am still copying it here in Huntsville AL from 220 miles out but is about out of range for me. Is there someone in the St. Louis, Kansas City, Little Rock, Memphis or east OK or NE TX that can set up an iGate tuned to 144.348 MHz tonight? If you already have an iGate, can you tune it to 144.398 or 144.348 MHz? This is an unplanned latex floater due to KF4ZTI putting in only a few ounces of positive lift on a 1200 gram balloon. It floated all day around 107000 feet but is descending after sunset...probably will level out around 90,000 feet and continue on west across Arkansas tonight.

- Bill WB8ELK




--
Margie Kay
Missouri MUFON Assistant State Director
www.missourimufon.org
MUFON Star Team
Kansas City, Missouri
816-833-1602 (office)



AVG logo

This email has been checked for viruses by AVG antivirus software.
www.avg.com




--
Margie Kay
Missouri MUFON Assistant State Director
www.missourimufon.org
MUFON Star Team
Kansas City, Missouri
816-833-1602 (office)

Re: KF4ZTI 11 latex floater now over Tulsa OK

Michael
 

Don’t worry, they’re here. 

--Michael Willett

On Jun 17, 2020, at 5:09 PM, Hank Riley via groups.io <n1ltv@...> wrote:


"But where are the drones?
Send in the drones"

_______________________________________


On Wednesday, June 17, Harry wrote:

With such a low signal and the high voltage power lines in the area both could've affected the RDF effort.
Too bad there isn't a way to use some Tesla magic to rejuvenate the  batteries. :)
_

Re: KF4ZTI 11 latex floater now over Tulsa OK

Hank Riley
 

"But where are the drones?
Send in the drones"

_______________________________________


On Wednesday, June 17, Harry wrote:

With such a low signal and the high voltage power lines in the area both could've affected the RDF effort.
Too bad there isn't a way to use some Tesla magic to rejuvenate the  batteries. :)
_

Re: KF4ZTI 11 latex floater now over Tulsa OK

Harry M
 

Thanks Mark!
With such a low signal and the high voltage power lines in the area both could've affected the RDF effort.
Too bad there isn't a way to use some Tesla magic to rejuvenate the  batteries. :)

Re: KF4ZTI 11 latex floater now over Tulsa OK

Mark Conner N9XTN
 

Just for fun, I pulled the expected wind profile for the landing site for below 10,000 ft:
 PRESS HGT(MSL) TEMP DEW PT  WND DIR  WND SPD
 HPA       M      C     C       DEG     M/S
 E = Estimated Surface Height

  984.   302.E  31.0   16.5   187.5     6.1
  983.   312.E  30.0   15.5   187.4     5.9
  980.   339.E  29.3   15.4   187.1     6.9
  975.   388.E  28.7   14.8   186.0     7.4
  967.   462.E  27.9   14.1   186.1     7.8
  953.   589.E  26.5   12.9   185.0     8.3
  935.   758.E  25.0   11.5   185.0     8.7
  915.   947.E  23.2   10.8   184.2     9.1
  891.  1172.E  21.1   10.0   184.4     9.2
  867.  1405.E  19.3    5.2   185.1     9.2
  840.  1676.E  17.2    4.5   183.7     8.4
  810.  1990.E  15.8   -1.4   163.6     5.8
  776.  2347.E  14.6   -6.4   127.9     4.6
  740.  2742.E  11.9   -6.4   107.7     5.7
  702.  3179.E   8.7   -4.5    91.4     7.4
 
Not a lot of direction change below the last report, so I think Harry's assumption on course was good.  However, assuming a 700 fpm descent rate based on the last two reports and about 4000 ft from last report to touchdown, that yields about 345 seconds of flying, and at 7 meters/sec that would put the balloon about 2.4 km NNE of the last report.  That would put it to the north of "Dan" in the KML file, north of the next E/W road to the north a bit.  That doesn't agree with Rich's DF results though.
Anyway, if you're planning an aerial search, I think it'd be worth a look another 1/2 to 3/4 mile north to NNE of "Pred3".
73 de Mark N9XTN

On Wed, Jun 17, 2020 at 2:50 PM Harry M <hhm_74115@...> wrote:
I've attached a KML file with the last 3 known positions and my 3 predicted positions.
A placemark where Dan K5SEL heard it and 2 placemark where Rich KD5JXU heard it.
From RICH1 it was East and from RICH2 it was West.

Rich might have a chance to go Aeromobile this weekend and scope out the area.

Re: KF4ZTI 11 latex floater now over Tulsa OK

Harry M
 

I've attached a KML file with the last 3 known positions and my 3 predicted positions.
A placemark where Dan K5SEL heard it and 2 placemark where Rich KD5JXU heard it.
From RICH1 it was East and from RICH2 it was West.

Rich might have a chance to go Aeromobile this weekend and scope out the area.

Re: KF4ZTI11 latex floater heading across Arkansas tonight

Steve G8KHW / AJ4XE
 

humm - read "in" as inches missed the almost invisible '

    Steve

On 17/06/2020 13:19, Zack Clobes W0ZC wrote:
Her question was about a 30 foot (~10 meters) balloon, not inches.



Zack

On Wed, Jun 17, 2020, 4:11 AM Steve G8KHW / AJ4XE <steve@...> wrote:

Its possible but quite unlikely I think - 30in balloons (I assume you are talking about the variety used for floater flights with payloads of a few grams) usually float about 8,000m (25,000ft) - about the 350mBar layer in the atmosphere - this is quite an active layer:

    https://earth.nullschool.net/#current/wind/isobaric/250hPa/orthographic=-92.78,37.08,432

    https://earth.nullschool.net/#current/wind/isobaric/500hPa/orthographic=-92.78,37.08,432

The shape of the balloon will have very little impact on the drift (if any at all).

    Steve G8KHW


On 16/06/2020 23:15, Margie Kay wrote:
I have a question for you balloon experts - I am a MUFON investigator and am wondering if it is possible for a balloon 30' in diameter to be shaped like a flat donut and stay in the same location and altitude for over six hours?

I appreciate your comments.

P.S. I'm setting up my MADAR unit in Independence, Missouri tonight if I can figure it out!

Sincerely, 

On Sat, Jun 13, 2020 at 9:23 PM Bill Brown via groups.io <wb8elk=aol.com@groups.io> wrote:
KF4ZTI-11 was launched this morning (Saturday) from Clarksville TN with just one pound of payload attached. GoPro type camera and an APRS tracker. It transmits every 1 minute on 144.39 and then 10 seconds later on 144.34 MHz...This payload sat in a tree for a week or two last year and saw quite a bit of weather. As a result the transmit frequency has shifted to 144.348 MHz on APRS as well as 144.398 MHz when it gets below -20 C...As a result it is out of the passband for most digipeaters. I am still copying it here in Huntsville AL from 220 miles out but is about out of range for me. Is there someone in the St. Louis, Kansas City, Little Rock, Memphis or east OK or NE TX that can set up an iGate tuned to 144.348 MHz tonight? If you already have an iGate, can you tune it to 144.398 or 144.348 MHz? This is an unplanned latex floater due to KF4ZTI putting in only a few ounces of positive lift on a 1200 gram balloon. It floated all day around 107000 feet but is descending after sunset...probably will level out around 90,000 feet and continue on west across Arkansas tonight.

- Bill WB8ELK




--
Margie Kay
Missouri MUFON Assistant State Director
www.missourimufon.org
MUFON Star Team
Kansas City, Missouri
816-833-1602 (office)



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Re: List of presenters (so far) for GPSL 2020

Mark Conner N9XTN
 

List below now has the subject of the talk - thanks to Hank N1LTV for the suggestion.

Bill Brown WB8ELKPico Ballooning Techniques & Hardware
Joanne Michael KM6BWBCross-country balloon race
Steve Randall G8KHWHAB in the UK
Jeff Ducklow N0NQNDe-spun camera platform using Arduino
Mark Patton KC0DADS-B payload for EOSS
Jayant MurthyExperiences in scientific ballooning in India
Mark Conner N9XTNNWS radiosonde chasing
Mike Hojnowski KD2EATLivestreaming video from balloon
Paul Verhage KD4STHSilicon radiation detectors

On Tue, Jun 16, 2020 at 9:06 PM Mark Conner <mconner1@...> wrote:
Below is the list of presenters I have as of today.  I believe we may also have Pat Kilroy N8PK and Bob Bruninga WB4APR, but I can't locate the email to confirm this.  Pat, please email me to confirm participation and topic.

I think we have room for one or maybe two more talks, depending on what we determine for the length of the different talks.  Right now we have right about 5 hours of talks.  If you would like to present, let me know before the end of the week so we can finalize the schedule.

73 de Mark N9XTN
Bill Brown WB8ELK
Joanne Michael KM6BWB
Steve Randall G8KHW
Jeff Ducklow N0NQN
Mark Patton KC0D
Jayant Murthy
Mark Conner N9XTN
Mike Hojnowski KD2EAT
Paul Verhage KD4STH

Re: KF4ZTI11 latex floater heading across Arkansas tonight

Zack Clobes W0ZC
 

Her question was about a 30 foot (~10 meters) balloon, not inches.



Zack


On Wed, Jun 17, 2020, 4:11 AM Steve G8KHW / AJ4XE <steve@...> wrote:

Its possible but quite unlikely I think - 30in balloons (I assume you are talking about the variety used for floater flights with payloads of a few grams) usually float about 8,000m (25,000ft) - about the 350mBar layer in the atmosphere - this is quite an active layer:

    https://earth.nullschool.net/#current/wind/isobaric/250hPa/orthographic=-92.78,37.08,432

    https://earth.nullschool.net/#current/wind/isobaric/500hPa/orthographic=-92.78,37.08,432

The shape of the balloon will have very little impact on the drift (if any at all).

    Steve G8KHW


On 16/06/2020 23:15, Margie Kay wrote:
I have a question for you balloon experts - I am a MUFON investigator and am wondering if it is possible for a balloon 30' in diameter to be shaped like a flat donut and stay in the same location and altitude for over six hours?

I appreciate your comments.

P.S. I'm setting up my MADAR unit in Independence, Missouri tonight if I can figure it out!

Sincerely, 

On Sat, Jun 13, 2020 at 9:23 PM Bill Brown via groups.io <wb8elk=aol.com@groups.io> wrote:
KF4ZTI-11 was launched this morning (Saturday) from Clarksville TN with just one pound of payload attached. GoPro type camera and an APRS tracker. It transmits every 1 minute on 144.39 and then 10 seconds later on 144.34 MHz...This payload sat in a tree for a week or two last year and saw quite a bit of weather. As a result the transmit frequency has shifted to 144.348 MHz on APRS as well as 144.398 MHz when it gets below -20 C...As a result it is out of the passband for most digipeaters. I am still copying it here in Huntsville AL from 220 miles out but is about out of range for me. Is there someone in the St. Louis, Kansas City, Little Rock, Memphis or east OK or NE TX that can set up an iGate tuned to 144.348 MHz tonight? If you already have an iGate, can you tune it to 144.398 or 144.348 MHz? This is an unplanned latex floater due to KF4ZTI putting in only a few ounces of positive lift on a 1200 gram balloon. It floated all day around 107000 feet but is descending after sunset...probably will level out around 90,000 feet and continue on west across Arkansas tonight.

- Bill WB8ELK




--
Margie Kay
Missouri MUFON Assistant State Director
www.missourimufon.org
MUFON Star Team
Kansas City, Missouri
816-833-1602 (office)



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