<s>
For	O
air	B-Application
traffic	I-Application
control	I-Application
,	O
SASS-C	B-General_Concept
is	O
an	O
acronym	O
for	O
"	O
Surveillance	O
Analysis	O
Support	O
System	O
for	O
ATC-Centre	O
"	O
.	O
</s>
<s>
SASS-C	B-General_Concept
Service	O
is	O
part	O
of	O
Eurocontrol	O
Communications	O
,	O
navigation	O
and	O
surveillance	O
.	O
</s>
<s>
SASS-C	B-General_Concept
Service	O
provides	O
two	O
main	O
software	O
suites	O
:	O
</s>
<s>
VERIFication	O
:	O
ATC	B-Application
surveillance	O
infrastructure	O
assessment	O
.	O
</s>
<s>
PREDICTion	O
:	O
performance	O
theoretical	O
calculation	O
of	O
the	O
ATC	B-Application
surveillance	O
sensors	O
.	O
</s>
<s>
There	O
are	O
two	O
key	O
functions	O
of	O
SASS-C	B-General_Concept
VERIFication	O
:	O
</s>
<s>
evaluation	O
of	O
the	O
actual	O
performance	O
of	O
ATC	B-Application
sensors	O
or	O
infrastructure	O
against	O
different	O
standard	O
like	O
Eurocontrol	O
Specification	O
for	O
ATM	O
Surveillance	O
System	O
Performance	O
(	O
ESASSP	O
)	O
.	O
</s>
<s>
SASS-C	B-General_Concept
VERIFication	O
is	O
designed	O
to	O
handle	O
all	O
current	O
surveillance	O
technologies	O
(	O
PSR	O
,	O
SSR	O
,	O
Mode-S	O
,	O
ADS-B	B-Application
,	O
WAM	O
)	O
as	O
well	O
as	O
trackers	B-Algorithm
.	O
</s>
<s>
SASS-C	B-General_Concept
VERIFication	O
is	O
divided	O
into	O
many	O
modules	O
.	O
</s>
<s>
IRIS	O
:	O
ATC	B-Application
surveillance	O
data	O
recording	O
,	O
decoding	O
and	O
statistics	O
.	O
</s>
<s>
OTR	O
(	O
Opportunity	O
Traffic	O
Reconstructor	O
)	O
:	O
build	O
a	O
reference	O
trajectory	O
based	O
on	O
the	O
ATC	B-Application
surveillance	O
data	O
generated	O
by	O
the	O
opportunity	O
traffic	O
.	O
</s>
<s>
This	O
module	O
is	O
widely	O
inspired	O
by	O
the	O
real-time	O
tracker	B-Algorithm
technologies	O
like	O
Kalman	O
filter	O
.	O
</s>
<s>
The	O
CMP	O
module	O
compares	O
the	O
ATC	B-Application
surveillance	O
data	O
against	O
reference	O
that	O
can	O
be	O
generated	O
by	O
OTR	O
or	O
imported	O
from	O
external	O
source	O
.	O
</s>
<s>
DISPlay	O
:	O
this	O
module	O
displays	O
ATC	B-Application
surveillance	O
data	O
,	O
reconstructed	O
data	O
and	O
performance	O
indicators	O
on	O
different	O
supports	O
like	O
geographical	O
view	O
,	O
scatter	O
diagram	O
,	O
table	O
or	O
mosaic	O
.	O
</s>
<s>
Since	O
the	O
beginning	O
of	O
development	O
in	O
1988	O
based	O
on	O
MURATREC	O
(	O
1985	O
)	O
,	O
the	O
SASS-C	B-General_Concept
software	O
has	O
been	O
under	O
constant	O
evolution	O
to	O
cope	O
with	O
supplementary	O
user	O
requirements	O
,	O
to	O
cover	O
surveillance	O
technology	O
upgrades	O
and	O
to	O
follow	O
software	O
technology	O
changes	O
.	O
</s>
<s>
In	O
version	O
6	O
,	O
both	O
suites	O
where	O
included	O
in	O
a	O
common	O
package	O
just	O
named	O
SASS-C	B-General_Concept
.	O
</s>
<s>
This	O
early	O
version	O
was	O
supporting	O
only	O
PSR/SSR/Mode	O
-S	O
Radars	B-Application
and	O
trackers	B-Algorithm
.	O
</s>
<s>
Since	O
end	O
of	O
2003	O
and	O
in	O
order	O
to	O
prepare	O
SASS-C	B-General_Concept
for	O
the	O
next	O
decade	O
,	O
important	O
software	O
re-engineering	O
has	O
been	O
undertaken	O
in	O
conjunction	O
with	O
functional	O
upgrades	O
,	O
with	O
the	O
aim	O
to	O
introduce	O
up	O
to	O
date	O
technologies	O
in	O
all	O
relevant	O
fields	O
while	O
enhancing	O
system	O
quality	O
.	O
</s>
<s>
The	O
main	O
functional	O
upgrades	O
relate	O
to	O
the	O
introduction	O
of	O
Aircraft	O
Derived	O
data	O
(	O
Mode	O
S	O
and	O
ADS-B	B-Application
)	O
,	O
and	O
multilateration	O
technology	O
in	O
the	O
Surveillance	O
environment	O
.	O
</s>
<s>
IRIS	O
(	O
IOSS	O
Recording	O
and	O
Import	O
into	O
SCDB	O
)	O
is	O
the	O
front	O
element	O
of	O
SASS-C	B-General_Concept
handling	O
Surveillance	O
Data	O
from	O
various	O
sensors	O
.	O
</s>
<s>
TRES	O
(	O
Trajectory	O
Reconstruction	O
and	O
Evaluation	O
Suite	O
)	O
is	O
the	O
core	O
suite	O
of	O
SASS-C	B-General_Concept
,	O
carrying	O
out	O
the	O
reconstruction	O
of	O
reference	O
trajectories	O
from	O
the	O
input	O
data	O
,	O
and	O
doing	O
the	O
evaluation	O
of	O
Surveillance	O
constituent	O
's	O
performance	O
.	O
</s>
<s>
SMART	O
(	O
Simulator	O
for	O
Multi-radar	O
Analysis	O
from	O
Realistic	O
Traffic	O
)	O
is	O
an	O
upgrade	O
of	O
the	O
present	O
real-time	O
simulator	O
generating	O
Surveillance	O
data	O
reports	O
by	O
sampling	O
simulated	O
aircraft	O
trajectories	O
.	O
</s>
<s>
SCAS	O
(	O
Surveillance	O
Coverage	O
Analysis	O
Suite	O
)	O
comprises	O
RASCAL	O
(	O
RAdar	B-Application
Sharing	O
CALculation	O
)	O
and	O
CAPT	O
(	O
Coverage	O
And	O
Planning	O
Tool	O
for	O
ADS-B	B-Application
and	O
TIS-B	O
)	O
,	O
a	O
new	O
tool	O
to	O
aid	O
in	O
the	O
positioning	O
of	O
ADS-B	B-Application
and	O
TIS-B	O
ground	O
stations	O
by	O
assessing	O
various	O
communication	O
load	O
scenarios	O
.	O
</s>
<s>
Taking	O
different	O
resolutions	O
of	O
Digital	O
Terrain	O
Elevation	O
Data	O
–	O
DTED	O
as	O
input	O
,	O
PREDICTion	O
computes	O
the	O
theoretical	O
performance	O
of	O
ATC	B-Application
surveillance	O
sensors	O
like	O
radars	B-Application
and	O
ADS-B	B-Application
or	O
WAM	O
ground	O
stations	O
:	O
</s>
<s>
The	O
theoretical	O
coverage	O
is	O
generated	O
in	O
two	O
forms	O
that	O
can	O
be	O
used	O
in	O
other	O
tools	O
like	O
SASS-C	B-General_Concept
VERIFication	O
:	O
</s>
