UNOSAT (satellite)

UNOSAT was a Brazilian scientific applications nanosatellite, designed, developed, built and tested by researchers and students working at the Northern Paraná University.

Features

The primary objective of UNOSAT was to transmit voice messages and a telemetry data packet in AX25 protocol.
The UNOSAT scientific satellite had the following characteristics:

General

Format: parallelepiped with 46 cm x 25 cm x 8.5 cm
Mass:
Orbit: heliosynchronous
Stabilization: by rotation at 120 rpm
Precision: 1 degree
Altitude:

Payload

The instrumentation shipped in UNOSAT was basically composed of: data collectors and transmitters.
The following data would be transmitted to earth:

Voice message identifying the satellite
Telemetry
Temperature of solar panels
Rechargeable battery temperatures
Temperature of the transmitter and the on-board computer
Battery voltage
Centripetal acceleration

Mission

As UNOSAT was planned to be launched as a secondary payload along with the SATEC satellite and it would be impossible for the launcher to put them into distinct orbits, both satellites were mechanically connected, although there was electrical and telemetry autonomy between the two. That satellite was lost in the explosion of the VLS-1 V03 launch vehicle on August 23, 2003 in an explosion three days before the launch date. This event came to be known as accident of Alcantara.