[amsat-bb] March-19 Balloon & Contest

Amsat Argentina amsatlu at gmail.com
Wed May 16 22:12:28 PDT 2012

We are pleased to inform next Saturday March-19 from 11hs-LU on
(GMT-3), a free Balloon UV Repeater will lift off from the city of
General Pico (Airport), Province of La Pampa, Argentina, 571 Km west
of Buenos Aires City. See details and photos

Given administrations requests made by Amsat Argentina, launch is
authorized and appropiate NOTAM (NOTification to AirMen) had been
issued and granted by National Civil Aviation Administration.

Contest & Prices: first 10 station making the most distance & contacts
will receive special certificate, top winner will receive a dual band
UHF/VHF handy.

Payload will operate as an UHF to VHF crossband repeater, with CW tlm,
APRS location and SSTV emissions in local and space frequencies.

According estimates Balloon could reach 100,000 feet height, traveling
from 50 to 100 miles towards east.

Thus allowing contacts between stations located in provinces of Buenos
Aires, Santa Fe, Entre Rios, Cordoba, Catamarca, Santiago del Estero,
La Pampa, San Luis, Mendoza, San Juan, Rio Negro, Neuquen, Uruguay &
Chile. (Launch is from Argentina Geo-Center to permit higher
participation). See coverage map on
http://www.amsat.org.ar/picocubr.jpg and estimated trajectory in
http://www.amsat.org.ar/pico120519.jpg .

For these experiences, Amsat-LU works with and it is thankful to hams
of Radio Clubs of Gral.Pico, QRM Belgrano, APRS Group and amsat-LU
members development team as well as those who have actively
participated and sent their reports in previous events.

More information at

Several flown experiments had been successfully operated during
2011/12 in manned-gliders, airplanes, captive and free Balloons
allowing operational & practice for hams contributing to platform
validaton of LUSEX satellite (LU Satellite EXperiment) on development
by Amsat Argentina. More on http://lusex.org.ar

In order to monitor the payload (if you are within 400 miles of launch
area) you need just an FM receiver either handy or base, in 145.950
for repeater and/or 144.930 for APRS. The repeater, that is activated
via 123 Hertz subtone, operates receiving voice FM in 435.950 Khz
(-112dbm, 0,56 uV) and emits with 2W the received audio live on
145.950 Khz.

Simultaneously APRS data will be sent in Packet at 1200 bauds in
144.930, and also in 145.950.

The DTI APRS symbol would change from a Balloon (/O) during the ascent
to a glider (/g) during parachute descent.

Payload would operate as voice repeater activated by 123 Hz subtone
during 1 minute, a warning bip at 40 seconds will indicate telemetry
is coming, which is emitted if the repeater is not in use, if in 20
seconds more voice repeater still in use a two bips will be heard
signaling that short APRS packages will begin in the different
frequencies, also every 5 minutes CW (telegraphy with tones of audio)
with CQ + callsign (LU7AA), sequence#, ext. and int. centigrade
temperatures and voltage of batteries, after which the cycle will

Experiment will also emit SSTV pictures in ROBOT-36 (36 seconds) in
real time, showing what glider/Balloon sees. Every 5 minutes during
ascent/descent and more spaced at high altitudes. (It can be received
among others with MIXW, MMSTV & RX-SSTV ).

To study propagation and allow DX station to listen, balloon will also
carry a 150 mW CW 7021 Khz transmitter, emiting callsign, sequence,
external and internal temperatures and battery voltage.

Payload would also carry on board two TV cameras (one towards earth
and another towards horizon) recording video and sound during the
flight. These captured videos could be recovered when payload is

APRS trajectory could be seen every minute, including speed, height,
external and internal temperatures and 7.2v battery voltage using
UI-View (download from the UI-View official site on
http://www.ui-view.org/) and/or to see/follow from Internet connecting
to http://aprs.fi/?call=lu7aa-11 or locally via Packet at specified

There are georeferenced Maps for UI-View in
http://www.amsat.org.ar/pico.jpg, http://www.amsat.org.ar/pico.txt.
Download and place them in directory Program Files/Peak
Systems/UI-View32/MAPS and rename .txt file to .inf.

The experiment in 435.950 KHz besides voice, receives and accepts DTMF
sequences commands on demand, I.E. sending B* (DTMF with handy
keyboard on UHF) will return S5 ... ..... in 145,950 VHF CW, reporting
in CW signal strength received from your station, if S9+10 will
returns P10.

There are also DTMF commands to control emission of CW tlm or APRS
beacon or SSTV emission, as well as allowing remote release of
payload, mode changes, timers control, energy, power, etc.

Frequencies for previous coordination, announcements and flights will
be 7090 Khz LSB +/-10 Khz and local repeaters.

During the flights will remain active wide coverage AMSAT-LU APRS
Igate LU7AA-10 on 144.930 and 430.930 KHz, operating from the
Constituyentes Investigation Center transferring whatever is received
towards Internet.

For being an experiment oriented to a next satellite, the contacts
made between stations via this payload will be considered valid for
the recently announced permanent, gratuitous and applicable Satellite
Certificate that AMSAT-LU and RClub QRM Belgrano grants, more info on

During the Balloon flight, amateur groups will chase the payload,
aiming to locate and recover. Trapping ventures holds on this
activity, as in the case of the Pampero 15 Balloon sent from San
Miguel del Monte which landed in the middle of the Magdalena's state
prison ... See http://www.lu5egy.com/Proyecto_pampero/vuelo_15/n_1esk.htm

All reports welcome. If you wish or can organize or want be part of
control, or like to pursuit and recovery, or like operating and
capturing data as an independent station, and/or wishes to join us
personally in this adventure from the launching places email us to
parapente at amsat.org.ar.

We appreciate reading of this information and thankful if distribution possible.

73, LU7AA, Amsat-LU, aiming at the future by making the present funny.
info at amsat.org.ar

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