The first satellite, Sputnik-1
Launch of Sputnik-1, 4 Oct 1957
Satellite Catalog Number 1 is given in the rocket
Sputnik /Sputnik (A, SL-1) which launched Sputnik-1.
Satellite Catalog Number 2 is SPUTNIK-1 1957-001B
JE9PEL, Mineo Wakita
The ideal AMSAT FM transponder for a cubesat is the PSK-31 transponder
being developed for the Naval Academy PSAT mission.
With an FM downlink, anyone can receive it with an HT and a laptop with
PSK-31 software. And anyone with a 10m PSK-31 uplink can transmit to it.
The reason it is ideal is that it is a multi-user transponder supporting
up to 30 users at the same time. Everyone can transmit horizon-to-horizon
and see everyone else. A big QSO party in the sky:
And since it is FM, Everyone tuned into the downlink SEES THE SAME
WATERFALL and sees EXACTLY where they are in the downlink. A small uplink
doppler adjustment can keep each station locked to his chosen channel in
Everyone can talk to everyone if they want, or go one-on-one too.
The SSB uplink and UHF downlink transponder fits on a smaller than 3"x3"
circuit board being developed by Mirek Kasal at Brno University.
If we could just get more Cubeats to fly these things, we would have all
the joys of multi-user transponders, and yet they fit well in any cubesat.
The ONLY problem is the HF wire antenna. Ours is going to be a 4 or 6'
whip of Nitinol Wire.
In addition to thes PSK-31 transponder, PSAT also supports the usual APRS
AX.25 transponder on 145.825 too. Launch is planned for Summer 2013.
As a part of our effort to continue promoting the proper use of the amateur radio satellites by the Cuban ham community and added to the several radio-conferences that Hector (CO6CBF), Pavel (CO7WT) had performed in the past months.
It's a big pleasure to announce that we start this past Friday a VHF FM Net devoted entirely to the Amateur Radio Satellites on the 2m band on a simplex frequency for the Havana Province (capital of Cuba), with few coverage also to the surrounding provinces of Mayabeque and Artemisa. The net will be on the air every Friday from 19:00 to 20:00 local time on 145.550 MHz, CM2ESP is the Net Control Station.
The net is divided in three sections: News; A Technical Topic; and Question and Answer Session.
This first net was very appreciated by many hams, and a lot more were not able to check-in due to the severe thunderstorm that affected Havana right close to the starting time.
The Cuban Satellite Group named Grupo de Radioaficionados para Operaciones Satelitales (GROS) will continue promoting and creating new activities to increase the presence of Cuban Amateur Radio Stations on the satellites and the activation of new grids.
Several demonstrations and workshops are currently being scheduled.
Thanks to all for the support and good wishes we had receive since we start this idea on November 2011 which its greatest moment was the official constitution of the Group on March this year.
Raydel Abreu Espinet, CM2ESP
PS: Sorry for bad english....
Este mensaje ha sido enviado mediante el servicio de correo electronico que ofrece la Federacion de Radioaficionados de Cuba a sus miembros para respaldar el cumplimiento de los objetivos de la organizacion y su politica informativa. La persona que envia este correo asume el compromiso de usar el servicio a tales fines y cumplir con las regulaciones establecidas.
Since the height above ground varies due to the elliptical nature of
orbits the max range also varies. Where the two stations are located
relative to the apogee of the orbit can also come into play. If you
are on the wrong side of the earth when the satellite is at its apogee
that could be a problem.
Here is my best shot at the range of max distances for AO-07 - compare
them to numbers you get from other folks and let me know what you
find. My numbers could be and are probably wrong.
73 W9KE tom...
Sent from my computer.