PCSat2
Encyclopedia
PCSat2 is an amateur radio
satellite
created by the US Naval Academy.
It was installed on the International Space Station
on August 3, 2005. PCSAT2 was recovered from the outside of the ISS
by astronauts on the 3rd EVA
of mission STS-115
and was return to Earth.
PCsat2 transmitted packet bursts every 3 minutes on 437.975 MHz. It had an UHF FM repeater on 437.975 MHz +/− 9 kHz, and 1200/9600 baud
digital operation.
It also carried a PSK31
Linear/FM Satellite translator accepting 3 kHz SSB
channel in the 10 meter band at 29.4 MHz and repeating that in baseband on a VHF or UHF narrow-band FM
downlink. This is intended to allow multiple simultaneous full duplex narrow band communications using morse
or PSK31
to be relayed by PCSat2 http://www.ew.usna.edu/~bruninga/psk31uplink.html.
Amateur radio
Amateur radio is the use of designated radio frequency spectrum for purposes of private recreation, non-commercial exchange of messages, wireless experimentation, self-training, and emergency communication...
satellite
Satellite
In the context of spaceflight, a satellite is an object which has been placed into orbit by human endeavour. Such objects are sometimes called artificial satellites to distinguish them from natural satellites such as the Moon....
created by the US Naval Academy.
It was installed on the International Space Station
International Space Station
The International Space Station is a habitable, artificial satellite in low Earth orbit. The ISS follows the Salyut, Almaz, Cosmos, Skylab, and Mir space stations, as the 11th space station launched, not including the Genesis I and II prototypes...
on August 3, 2005. PCSAT2 was recovered from the outside of the ISS
ISS
The ISS is the International Space Station.ISS may also refer to:* I See Stars, an American electronic rock band* ISS A/S, a Danish service company* Idea Star Singer, a Malayalam music reality show by Asianet TV...
by astronauts on the 3rd EVA
Extra-vehicular activity
Extra-vehicular activity is work done by an astronaut away from the Earth, and outside of a spacecraft. The term most commonly applies to an EVA made outside a craft orbiting Earth , but also applies to an EVA made on the surface of the Moon...
of mission STS-115
STS-115
Note:The P3/P4 Truss segment and batteries were so heavy that the crew count was reduced from seven to six.-Crew notes:...
and was return to Earth.
PCsat2 transmitted packet bursts every 3 minutes on 437.975 MHz. It had an UHF FM repeater on 437.975 MHz +/− 9 kHz, and 1200/9600 baud
Baud
In telecommunications and electronics, baud is synonymous to symbols per second or pulses per second. It is the unit of symbol rate, also known as baud rate or modulation rate; the number of distinct symbol changes made to the transmission medium per second in a digitally modulated signal or a...
digital operation.
It also carried a PSK31
PSK31
PSK31 or "Phase Shift Keying, 31 Baud" is a digital radio modulation mode, used primarily in the amateur radio field to conduct real-time keyboard-to-keyboard informal text chat between amateur radio operators.- History :...
Linear/FM Satellite translator accepting 3 kHz SSB
SSB
- Organizations :* '* Societas Sanctae Birgittae, the Society of Saint Bridget* Society of the Sisters of Bethany, an Anglican religious order* Statistics Norway, , Norwegian government statistics bureau...
channel in the 10 meter band at 29.4 MHz and repeating that in baseband on a VHF or UHF narrow-band FM
FM broadcasting
FM broadcasting is a broadcasting technology pioneered by Edwin Howard Armstrong which uses frequency modulation to provide high-fidelity sound over broadcast radio. The term "FM band" describes the "frequency band in which FM is used for broadcasting"...
downlink. This is intended to allow multiple simultaneous full duplex narrow band communications using morse
Continuous wave
A continuous wave or continuous waveform is an electromagnetic wave of constant amplitude and frequency; and in mathematical analysis, of infinite duration. Continuous wave is also the name given to an early method of radio transmission, in which a carrier wave is switched on and off...
or PSK31
PSK31
PSK31 or "Phase Shift Keying, 31 Baud" is a digital radio modulation mode, used primarily in the amateur radio field to conduct real-time keyboard-to-keyboard informal text chat between amateur radio operators.- History :...
to be relayed by PCSat2 http://www.ew.usna.edu/~bruninga/psk31uplink.html.