Fachhochschule Wiener Neustadt Pegasus

Pegasus is a 2U CubeSat. The satellite will be ejected into a sun synchronous orbit with an initial altitude of ~380 km and an inclination of ~98° on June 23, 2017.

NASA-Catalog: tbd


436.670 MHz, 9k6 FSK AX.25





Orbital Parameter

NORAD                   tbd
COSPAR designator       tbd  
Inclination             97.462
RA of A. Node           233.998
Eccentricity            0.0006577
Argument of Perigee     287.336
Revs per day            15.22039303
Period                  1h 34m 36s (94.60 min)
Semi-major axis         6 878 km
Perigee x Apogee        495 x 504 km
BStar (drag term)       0.000000000 1/ER
Mean anomaly            299.105


PEGASUS will be equipped with the aforementioned Langmuir probes and will provide information about essential properties of the plasma in the thermosphere such as the electron temperature and –density. In order to ensure the capability to collect and downlink the data over several months, PEGASUS requires about the same types of subsystems as one would find on large-scale satellites. This includes an attitude control system, an on-board computer, telecommunication devices, an electrical power systems allowing to harvest the solar power and either distribute or store it for later use, a thermal control system – to name only some. In addition to the above, PEGASUS will also feature a propulsion system which, if successful, would be the first time to use such a system on a nanosatellite.


The satellite Pegasus is a 2U CubeSat with 2 redundant TRX modules on one PCB. This communication module is called STACIE. The two 90° crossed dipole antennas are used independently by the two TRX modules. STACIE is supplied by the two independent power busses of the satellite. Thus, the communication system of Pegasus is operating independently and redundantly.

The TT-64 protocol regulates the data transfer between the satellite and the GS in both directions (air interface). The TT-64 protocol supports the time division multiplex method (semi duplex communication). A complete data packet consists of a 70 bytes string, whereas 6 bytes are created automatically by the TRX module of the communication interface STACIE for synchronizing and receiver tuning. The remaining 64 bytes are data bytes. The last 18 bytes are used for CRC and FEC.

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