On Tue, Jun 22, 2010 at 04:05:51PM +0200, i8cvs wrote: > ----- Original Message ----- > From: "William Leijenaar" <pe1...@yahoo.com> > To: <amsat-bb@amsat.org> > Sent: Tuesday, June 22, 2010 12:03 PM > Subject: [amsat-bb] Balloon mission from Austrian hams > > Hi AMSATs, > > Last weekend I was in Austria for holidays, and on the Saterday there was a > high altitude balloon experiment done by Austrian hams which included a > known transponder to me ;-) > My location was near Landeck, some 350km west of the balloon experiment and > down in the valley, which made it impossible for me to work the transponder > (from my mobile ham station). > > >>From the website I understand that the balloon experiment was successfull, > but I read some remarks that the transponder unfortunately was not used very > much. > Most propably because the event was not widely known amoung the hams. > > What I understand, is that there will be another balloon mission on Saterday > (26-June) during the well known Ham Radio event in Friedrichshafen. > I will not be at the Ham Radio, but I like to pass on the news to other hams > who will be there and have a chance to listen/work the transponder or the > balloon APRS. > > The balloon information can be found at the website of OEVSV: > http://www.oevsv.at/opencms/modules/news/20100621_ballon_passepartout_5_nach > lese_2010_graz.html?uri=/index.html > > > 73 de PE1RAH, > William Leijenaar > www.leijenaarelectronics.nl > > Hi William, PE1RAH > > Congratulations ! > > It would be very interesting to know if your transponder was recovered at > the end of the flyght. > > In Italy early in 1982-1984 we did three hight altitude balloon transponder > flights at 40.000 meters as a secondary AMSAT passenger on board of high > altitude balloons with primary experiments of the italian CNR and french > CNES both governement research organizations. > > The high altitude baloons were lifting from the airport of Milo Sicily and > were recovered near Huelva south of Spain after three days of flight > crossing the mediterranean at a maximum latitude over the Balearis islands. > > The name of the joint CNR and CNES flyght mission was ODISSEA and > italian balloons were named ULISSE, TELEMACO and PENELOPE i.e. > the name of three heros from the Omero's poem ODISSEA. > > Our italian linear transponder was designed by i5TDJ (now SK) and it was > built with fundings of ARI the Associazione Radioamatori Italiani ad it was > publiched with drawings and photos in four pages of the AMSAT newsletter > June 1978 Volume X- Numbar-2 > > I can send a copy of it to you and to everybody is interested on it. > > Our three linear 100 mW transponder prototypes were in Mode-A and in > Mode-B with a total bandwidth of 45 KHz but the 10.7 MHz IF was splitted > into three overlappd sections 15 KHz each with three separate amplifiers > and with three separate AGC controls in order do not desense the full > bandwidth of 45 KHz in presence of one very strong signal falling into one > 15 kHz wide IF amplifier. > > During the flights at 40.000 km altitude many QSO's were made with the > balloon over the mediterranean area and the transponder never failed one > flyght. > > Our linear transponder was recovered every time under CNR and CNES > command near Huelva south Spain and actually is still working as a linear > transponder on top of a mount in north of Italy. > > Best 73" de > > i8CVS Domenico
Domenico, The payload including William's transponder was recovered two hours after splash-down in a montainous area covered completely with forest. No GSM communication in that area - 6 different providers were under test ! Only the Global Star configuration was successful in receiving the precise landing coordinates - a narrow trail between 30 m high trees on both sides. Three previous flights ended up always high up in trees and the help of the fire brigades was needed - for cutting down the trees ;-) The next flight will be this weekend (Saturday, June 26) at the Ham Radio fair in Friedrichshafen. Planned height 28 km, not high enough for Napoli - sorry ! Vy 73 de Viktor OE1VKW _______________________________________________ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
