VIA Technologies EPIA SN-Series Specifications download pdf (Page 40)

FASTER

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RE.F.06

Images shall be acquired so

that image mosaicing can be

successfully accomplished

during both real time

processing or postprocessing

operations

The planning tool will take into account

the selected along track and cross track

overlap percentage as stated in Section

5.4. For the purpose of this work

mosaicing operations will be done in a

postprocessing phase.

RE.F.07

Images and final mosaic shall

be georeferenced during both

real time or post-processing

operations

Ancillary data to determine image

external parameters will be acquired via

the GPS receiver and the IMU. For the

purpose of this work data will be saved

in a flight log where each frame is

referenced.

RE.F.08

The system shall be able to

acquire a DEM of the target

area in order to generate

orthophotos

DEM extraction will be possible

installing a stereo imager. At present

DEM extraction feature will not

implemented, so existing DEMs will be

used to generate orthophotos.

RE.F.09

All the acquired data must be

stored in order to be available

at a later time

FASTER will be equipped with Solid

State Disks in order to store all the

acquired images.

RE.F.10

The pilot shall be able to

interact with the system in

order to make any changes to

the preloaded flight plan

Pilot interaction with the system will be

possible through the guidance interface

that has been provided with control

buttons as stated in Section 6.6.

RE.F.11

The system shall have a totally

independent power source

FASTER will have an independent

power supply made up by a Pb battery.

Performance Requirements

RE.P.01

The system shall ensure a

GSD < 10 cm from the typical

flight altitude of general

aviation or very light aircrafts

Given the flight altitude a set of

interchangeable lens can be used to

keep the GSD below the 10 cm

threshold; SWIR and TIR detectors will

have a reduced GSD due to the bigger

pixel pitch (25 to 30 µm)

RE.P.02

DEM resolution shall be in the

same order of the GSD

Whereas DEM extraction is not

implemented, the existing DEM used to

generate the orthophoto will need to

have a compatible resolution.

RE.P.03

The system shall guarantee

blur free images in each

particular flight condition

Although no Forward Motion

Compensation will be implemented, the

cameras pixel pitch (9 µm) has been

selected in order to guarantee a short

exposure time in order to avoid blur

effects.

RE.P.04

Camera systems must be

calibrated in order to correct

distortion effects due to

selected optical frontend

Each camera will be calibrated to

retrieve internal orientation parameters

via an image-processing based

algorithm. Lens distortion polynomial

coefficients are also determined by the

same procedure.

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