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NanoSAT
Our nano and microsatellites will be based
on the Aramis architecture developed by Politecnico
di Torino. Aramis is a modular architecture composed
of standard tiles, or modules. The tiles that
build up the external surface of the satellite
have unified dimensions of 15x15 cm2. Several
tiles can be connected together on one face of
the satellite to form a surface multiple of the
tile size. The tiles have an aluminum frame and
the connection creates the mechanical structure
of the satellite. The connection provides also
the electrical power and data bus of the satellite.
External tiles can be of three types:
- Power supply & ACS:
the tile provides a “sandwich” formed
by a solar panel, LiPo batteries, solar cell
control and battery charger unit, solenoid and
inertial wheel for attitude control, a solar
or star sensor, current, voltage and temperature
sensors for control and telemetry, a small DSP
performing ACS and power management tasks.
- Telecommunications: a special
tile that carries transceivers, power amplifiers
and antennas for tt&c links. A single tile
provides one UHF and one SHF bi-directional
data link. Output power is in the range of 2-5W
for UHF link and 2-7W for SHF link. Bit rate
is 9600bps in UHF and selectable from 10kbps
to 1Mbps in SHF. The main scope of this tile
is tele-command, telemetry and control, but
the SHF link can also be used for payload if
the bandwidth is sufficient.
- Low power thruster for orbit
control. A small propulsor, specially designed
for low mass satellites, will be used.
The satellite will have one internal module
hosting the on board computer, the rest of the
internal space is free and used to accommodate
the payload.
Complete satellites can have different shapes
to cope with different payloads and different
orbits.
We will be able to offer satellites as
small as a cube of 15 cm side and less than 5kg
mass, to much bigger satellites based on the same
architecture and with a maximum mass of 50kg.
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