The structure has the shape of square box. The box sides are made of L section bars connected by two M3 screws in each corner:
All the subsystems are located on aluminium plate on one of the box faces
The imaging system including telescope and camera is fixed to a bar .
A preliminary test of the structure strength has been conducted in our laboratory
Thermal environment is a critical aspect that must be considered in the mechanics configuration of our system. The most temperature sensible element of the electronic system is the motherboard which operative temperature are -20° ÷ + 40°C fanless. For this reason a thermal protection is required.
We have developed a two masses thermal model:
- the first mass is the electronic package which includes also the batteries for a total volume of about 100x100x120mm3;
- the second mass is the polystyrene thermal protection .
The electronic temperature is kept in the operative range as shown in the previous figures using a 60 mm polystyrene thermal protection.
On board data handling
The on board data management consists of a TS-7800 motherboard, which has an embedded LINUX operative system and allows to perform complicate tasks in short command line instructions. The experiment data collection has been designed as many tasks running in parallel exploiting the features of the LINUX OS.
AURORA doesn’t have any data-link with the gondola, in fact all data will be collected on memories: one 2 GB compact flash, 2 SD memories.
Images will be stored in the camera Compact Flash
The imaging system is obtained using the commercial camera CANON EOS 400D.
This camera makes available a remote switch for command by a remote computer.
In order to avoid using the Lithium battery which would not perform satisfactorily in low temperature environment it has been removed and camera is powered by in board battery
Since the telescope is not hermetic its lens won’t blow
WebMaster: Mary Lettiero