VIA Technologies EPIA SN-Series Specifications download pdf (Page 125)

Results of the test campaigns

113

Figure 97: First flight campaign, planned vs flown altitude

Furthermore, because of the prolonged ground operations, during which the system

was turned on, the battery went down before completing the entire flight. Although the

guidance tunnel did not work correctly the FASTER airborne internal management and

computing unit acquired all the information from the GPS receiver and the I.M.U,

working, in flight, for more than 50 minutes. Also the camera timing was correct and all

images were stored into the hard drive, but unfortunately, due to the rotation of the focus

ring, caused by the engine vibrations, only few images were at the correct focus distance.

The experience gained during the first flight campaign was crucial to apply major

changes to the guidance tunnel interface and most of problem encountered were fixed.

The camera focus ring was blocked at infinity using a plastic band. During the next

campaigns an appropriate magnetometer calibration was applied making the calibration

(360° turnaround) procedure directly on board the aircraft.

The camera sensitivity was set to ISO 100, in order to avoid electronic noise, the

aperture was F/4 while the exposure time was 4*10

-3

s because the flight was made in the

late afternoon. One of the images correctly acquired was georeferenced and an high

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VIA Technologies EPIA SN-Series Specifications Page 125