Aerospace & Defense Technology - April 2021 - 5

survey has shown that SisTrO is the
world's first system that can compute in
real time the six degrees of freedom
(6DoF) trajectory of the released store.
The required bandwidth for SisTrO (or
any similar system) real-time highspeed, high-resolution video frame data
transmission is far above the capability
of a typical Gigabit Ethernet connection. After experimenting with various
solutions, IPEV found the one proposed
by ADL Embedded Solutions to be the
optimal solution for matching all SisTrO
development system requirements.
The SisTrO hardware components include Mikrotron high-speed cameras,
ADL's trajectory and image processors,
which use the EURESYS Frame Grabber,
and a Telspan Data switch / PTP (Precision Time Protocol) Grand Master.
SisTrO software components are responsible for image and data analysis as well
as system integration. (Figure 2)

cost-effectiveness of the flight test campaign. Because SisTrO will be used in
airborne conditions, the system design
encountered three main challenges.

The Need for High-speed Transfer
To achieve real-time trajectory results,
the SisTrO system needs a transmission
rate in excess of 11 gigabits per second
(Gbps) to transfer all the data collected

by the camera to the image processor.
However, traditional Ethernet solutions
cannot meet that rate or sustain highvolume data transfer, meaning a local
camera recording operation followed by
data transmission would cause an unacceptable processing delay. Since most
vendors provide Ethernet solutions, IPEV
had not been able to find a solution for
SisTrO.

System Design Challenges
The ability of SisTrO to compute desired trajectory analyses at 6DoF and in
real-time improves the efficiency and

Figure 1. The SisTrO has been installed in the IPEV's Photogrammetric Pod in the Test Bed. Shown in the
diagram is a simulation of an external store. (Source: Brazilian Air Force Flight Test and Research Institute)

FTI Data Acquisition System

SisTro
Image Processor

Hi-speed hi
Resolution
Camera

Trajectory Processor

PCM
OUT

2 x CPX-6

IRIG-B

Switch

GPS Antenna

Sync

Reference
Points

Hi-speed hi
Resolution
Camera

1000 Base-T Ethernet
with PTP v.2
Image Processor
Figure 2. SisTrO Block Diagram. (Source: Brazilian Air Force Flight Test and Research Institute)

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Aerospace & Defense Technology - April 2021

Table of Contents for the Digital Edition of Aerospace & Defense Technology - April 2021

Aerospace & Defense Technology - April 2021 - Intro
Aerospace & Defense Technology - April 2021 - Sponsor
Aerospace & Defense Technology - April 2021 - Cov1
Aerospace & Defense Technology - April 2021 - Cov2
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Aerospace & Defense Technology - April 2021 - Cov3
Aerospace & Defense Technology - April 2021 - Cov4
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