<s>
Sentinel-1A	B-Algorithm
is	O
a	O
European	O
radar	O
imaging	O
satellite	O
launched	O
in	O
2014	O
.	O
</s>
<s>
It	O
is	O
the	O
first	O
Sentinel-1	B-Algorithm
satellite	O
launched	O
as	O
part	O
of	O
the	O
European	O
Union	O
's	O
Copernicus	B-General_Concept
programme	I-General_Concept
.	O
</s>
<s>
The	O
satellite	O
carries	O
a	O
C-band	B-Algorithm
Synthetic	B-Application
Aperture	I-Application
Radar	I-Application
which	O
will	O
provide	O
images	O
in	O
all	O
light	O
and	O
weather	O
conditions	O
.	O
</s>
<s>
Copernicus	O
is	O
the	O
long-term	O
European	O
Union	O
Earth	O
observation	O
and	O
monitoring	O
programme	O
under	O
the	O
former	O
name	O
of	O
GMES	B-General_Concept
(	O
Global	B-General_Concept
Monitoring	I-General_Concept
for	I-General_Concept
Environment	I-General_Concept
and	I-General_Concept
Security	I-General_Concept
)	O
and	O
established	O
by	O
a	O
Regulation	O
that	O
entered	O
into	O
force	O
in	O
2014	O
.	O
</s>
<s>
It	O
provides	O
multi	O
temporal	O
Synthetic	B-Application
Aperture	I-Application
Radar	I-Application
images	O
with	O
a	O
temporal	O
gap	O
of	O
12	O
days	O
.	O
</s>
<s>
Sentinel-1A	B-Algorithm
arrived	O
at	O
its	O
launch	O
site	O
in	O
Kourou	O
,	O
French	O
Guiana	O
on	O
25	O
February	O
2014	O
,	O
ahead	O
of	O
its	O
launch	O
which	O
was	O
at	O
the	O
time	O
planned	O
for	O
28	O
March	O
.	O
</s>
<s>
Sentinel-1A	B-Algorithm
was	O
launched	O
on	O
3	O
April	O
2014	O
by	O
a	O
Soyuz	O
rocket	O
at	O
21:02:31	O
GMT	O
(	O
23:02:31	O
CEST	O
)	O
.	O
</s>
<s>
At	O
09:43	O
and	O
at	O
11:21	O
on	O
5	O
April	O
2014	O
ACRIMSAT	O
was	O
rated	O
as	O
having	O
a	O
high	O
risk	O
of	O
collision	O
(	O
<	O
20m	O
)	O
with	O
the	O
newly	O
launched	O
Sentinel-1A	B-Algorithm
.	O
</s>
<s>
A	O
39-second	O
burn	O
of	O
Sentinel-1A	B-Algorithm
during	O
LEOP	O
successfully	O
avoided	O
the	O
collision	O
.	O
</s>
<s>
Preliminary	O
data	O
,	O
taken	O
during	O
commissioning	O
,	O
demonstrated	O
the	O
versatility	O
and	O
capability	O
of	O
the	O
imagery	O
produced	O
by	O
Sentinel-1A	B-Algorithm
even	O
before	O
the	O
radar	O
system	O
is	O
fully	O
calibrated	O
.	O
</s>
<s>
Data	O
became	O
available	O
to	O
all	O
system	O
users	O
on	O
6	O
October	O
2014	O
,	O
marking	O
the	O
beginning	O
of	O
Sentinel-1A	B-Algorithm
operational	O
life	O
.	O
</s>
<s>
In	O
2014	O
,	O
data	O
from	O
the	O
Sentinel-1A	B-Algorithm
satellite	O
in	O
LEO	O
was	O
transmitted	O
via	O
an	O
optical	O
link	O
to	O
the	O
Alphasat	O
in	O
GEO	O
and	O
then	O
relayed	O
to	O
a	O
ground	O
station	O
using	O
a	O
Ka	O
band	O
downlink	O
.	O
</s>
<s>
On	O
31	O
August	O
2016	O
,	O
ESA	O
announced	O
they	O
had	O
discovered	O
that	O
a	O
solar	O
panel	O
on	O
the	O
Copernicus	O
Sentinel-1A	B-Algorithm
satellite	O
had	O
been	O
hit	O
by	O
a	O
millimetre-size	O
particle	O
in	O
orbit	O
on	O
23	O
August	O
.	O
</s>
<s>
As	O
of	O
2200	O
UTC	O
on	O
7	O
September	O
2016	O
,	O
the	O
JSpOC	O
has	O
identified	O
5	O
pieces	O
of	O
small	O
debris	O
in	O
the	O
vicinity	O
of	O
Sentinel-1A	B-Algorithm
(	O
SCC#	O
39634	O
)	O
,	O
which	O
they	O
believe	O
are	O
the	O
result	O
of	O
the	O
small	O
particle	O
impact	O
identified	O
by	O
ESA	O
on	O
23	O
August	O
.	O
</s>
