At maximum altitude the 10 mW signal from these balloons could have a potential range of up to 700 km.
I’m planning on launching 3 balloons from Gliwice Glider Airport [Upper Silesia], with ultralight (36-40 grams) payloads.
First launch on Wednesday, May 1 at 9:00 UTC – under 100g kaysam / Helium – just for hardware check 437.600 MHz
Second on Saturday, May 4 at 9:00 UTC – 1600 g Hwoyee / Hydrogen – 437.595 MHz
Third on Saturday, May 4 at 10:00 UTC – 1600 g Hwoye / Hydrogen – 437.615 MHz
RTTY, 470 Hz shift / 50 baud / 7n1
The IARU Region 1 site carries this report on the May 4 balloon launch:
On Saturday, May 4, 2013 at 9:00 UTC (11:00 am – local time), the team from the club SP9PDF – directed by Tomasz, SP9UOB – will launch an unmanned stratospheric balloon. The current record of flight altitude is 44,376 feet above sea level.
The balloon named SEBA-1 will be launched from the Aero Club of Gliwice within the project “From Gliwice to Space”, started in June 2012.
A telemetry transmitter (its power – 10 mW) will be placed in a capsule, the balloon will operate on RTTY on the frequency 437.600 MHz USB (+ / – thermal drift of about 10 kHz), 50 baud, 470 Hz shift, 7N1. To receive telemetric data, you should use the dl-fldigi program.
Detailed instructions for configuration of the software can be found at: http://sp9uob.verox.pl/rtty_tracking.html
The capsule has a total weight of just 37 grams, including: the electronic circuits – 8 grams, the power (R6) – 14 grams, the antenna – 3 grams, the thermal insulation – 12 grams.
Such light weight load, combined with a giant balloon (2 kg of latex filled with hydrogen) should result, at least, in approaching the world record.
We invite everyone to track the flight of the balloon by listening on the indicated frequency, or at the following website: http://spacenear.us/
Source of information: SP9PDF Club Team – IARU Region 1 http://www.iaru-r1.org/
Beginners Guide to Tracking using dl-fldigi http://ukhas.org.uk/guides:tracking_guide
To get details of upcoming balloon launches subscribe to the UKHAS Mailing List by sending a blank email to this address: firstname.lastname@example.org
Twitter #ukhas https://twitter.com/search?q=%23ukhas
Tracks of balloon launches can be seen at http://www.spacenear.us/tracker