[UKHAS] Slovakia Launch Announcement - STS-1 (Saturday 8-SEP-2012)

[Radim Mutina]

Hi all,

I would like to announce our first flight - STS-1 (in Slovakia):

Date/Time: 8-SEP-2012, 9:00 UTC (11:00 - CET) if weather permits

Frequency1: 434.650 MHz, 10 mW, UKHAS protocol, 425 Hz shift, 300 Bd, 7n1, dl-fldigi payload STS-1, chase car - STS-1_chase
Frequency2: 144.800 MHz, 300 mW, APRS, call OM2AMR-11
Frequency3 (optional) - 404.650 MHz, 50 mW - see more details bellow


Details about payload and balloon:

Hwoyee 1600
Helium
Weight - cca 1500g
Payload is consisting of two parts - our own box and radiosonde Vaisala RS92-SGPD. We would like to compare our measurement of TEMP, BARO, HUMIDITY with professional measuring.

Thank you for allowing us to use spacenear.us/tracker ! ;-)


Radim OM2AMR

[John Graham-Cumming]

Cool to see the comparison when your flight is over. Good luck!

John.

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[Anthony Stirk]

Good luck Radim,

If you let me have the launch location I'll load the live prediction up for the launch. If you are using a 1600g Hwoyee make sure you put more gas in than you think you need !

Cheers,

Anthony

[Radim Mutina]

Thank you very much for the support Anthony !

Launch location is:

48.7051, 17.8438

Regarding Hwoyee filling, I'm using CUSF burst calculator for lift/gas calculation. Do you think I could trust it ?

Cheers,

Radim

[Tomasz Brol]

W dniu 03.09.2012 16:42, Anthony Stirk pisze:

> Good luck Radim,
>
> If you let me have the launch location I'll load the live prediction
> up for the launch. If you are using a 1600g Hwoyee make sure you put
> more gas in than you think you need !

Anthony,

Could You explain why?

Tom, SP9UOB

[Anthony Stirk]

the CUSF Burst Calculator works fine, however Hwoyee 1600g's can be a little random . Past experience has shown :

a) generally they go higher than expected
b) accent rate 4.5m/s - 5m/s may end up floating but will probably burst that day.
c) 4 m/s accent rate or less its highly likely to float for a long time.

Sometimes its hard to measure the neck lift accurately on site so unless you're planning on floating aim for 5.5m/s ascent rate, once you think you have it squirt* a little more gas in just for good luck. My rule is as follows :

Want it back : 1 squirt
Flying a GoPro : 2 squirts.

* The "squirt" isn't a universally accepted SI unit but generally 1 squirt = count to 3 with the valve open.

Cheers,

Anthony

Cheers,

Anthony

[Elmar PD3EM]

Hi Anthony,

Is this only for the Hwoyee 1600 grams balloon?
I have a 1000 grams Hwoyee (bought from Tim) which I want to use for my
first launch.
The payload will be about 600 grams when a camera will be used.

73, Elmar PD3EM

[Anthony Stirk]

Not sure there is enough data, I think the 1000g are a little more well behaved but will go higher than they are meant too. I'd bow to anyone with better knowledge on them but I'd probably aim for 5.5m/s to err on the side of caution.

Cheers,

Anthony

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[Dave Hibberd]

In light of this, I propose the motion that under the new UKHAS Standard Measurements scheme, the squirt be renamed to a "stirk" for it's common goal of preventing the whole system from going further up(u). All in favour say aye!

Now, back to the real thread - Good luck with the launch, guys!

---

Date: Mon, 3 Sep 2012 16:11:46 +0100
Subject: Re: [UKHAS] Slovakia Launch Announcement - STS-1 (Saturday 8-SEP-2012)
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[James Coxon]

Hey all,

Just a quick reminder about the launch of STS-1 launch in Slovakia
this morning - at max altitude this flight should have a good coverage
so any stations within 500km or so should be able to hear it. Anyone
in neighboring countries should listen out.

James

[Radim Mutina]

Hello,

I would like to thank to all community for the support!

It was unbelievable beautiful day ! Our first flight broke Slovak HAB record with 39093m ;-) We put to the HWOYEE1600 one "STIRK" more as Anthony suggested ;-)

RTTY telemetry worked like charm, APRS too. The box was falling upside down, so UP camera recorded descend, not chute.

We had just one problem with the microSD from still camera. We have half of photos with corrupted files - so we will try it to recover by some way :-(

Anyway, videos from side and up #16 cameras are beautiful, including burst.

I will post the videos/photos during the next weekend.

I will also to cut&paste screenshots from UKHAS tracker as soon as possible.

Again, thanks for all!

Radim OM2AMR





We successfuly recovered STS-1 from 15m high tree

[John Graham-Cumming]

Sounds great. I'm planning to use #16 cameras on a future flight. How did you power them?

John.

[Anthony Stirk]

Glad the new SI unit helped !

Look forward to seeing the pics & video.

Cheers

Sent from my iPhone

On 9 Sep 2012, at 08:49, Radim Mutina <radim....@gmail.com> wrote:

[Radim Mutina]

I used 4x AA Lithium with 5V LDO and short USB cables. Cameras was charged before flight, so USB power acted like backup.

Radim

[Radim Mutina]

Balloon burst shots

http://stsproject.net/?p=282


Radim

[navrac]

great shots of the burst - well done!

[Costyn van Dongen]

Hi Radim,

Congrats on a great flight. Those balloon burst pics are simply
amazing! Thanks for sharing.

Cheers,

Costyn.

[Radim Mutina]

first video

http://www.youtube.com/watch?v=h_oPXN7hdLw

Radim

[Radim Mutina]

Good evening,

we have measurement comparison for meteo radiosonde Vaisala  RS92-SGPD and our sensors from STS-1 flight finaly. Someone here was interrested in these results, so there is it:

1. BMP085 - error in barometric altitude casued by pressure under 300 hPa - out of BMP range

http://stsproject.net/wp-content/uploads/2012/09/Screen-Shot-2012-09-13-at-17.56.30.png

2. burst pressure  by BMP

5.28 hPa

3. burst pressure by Vaisala (recalculated to "reduced" pressure value)

3.74 hPa

2. DS1820 and Vaisala outside temp comparison

http://stsproject.net/wp-content/uploads/2012/09/Screen-Shot-2012-09-18-at-17.12.09.png

-orange line -DS1820

-blue line - Vaisala

For more graphs from STS-1 flight (in Slovak language only, I'm sorry)  check this page http://stsproject.net/?p=368

Cheers,

Radim_OM2AMR

[chrishillcox]

Hi Radim, Good luck with the flight. Does your project have a web site? Cheers Chris at Balloon News