<s>
The	O
advanced	B-Algorithm
Stirling	I-Algorithm
radioisotope	I-Algorithm
generator	I-Algorithm
(	O
ASRG	O
)	O
is	O
a	O
radioisotope	O
power	O
system	O
first	O
developed	O
at	O
NASA	O
's	O
Glenn	O
Research	O
Center	O
.	O
</s>
<s>
The	O
higher	O
conversion	O
efficiency	O
of	O
the	O
Stirling	O
cycle	O
compared	O
with	O
that	O
of	O
radioisotope	B-Application
thermoelectric	I-Application
generators	I-Application
(	O
RTGs	O
)	O
used	O
in	O
previous	O
missions	O
(	O
Viking	O
,	O
Pioneer	O
,	O
Voyager	O
,	O
Galileo	O
,	O
Ulysses	O
,	O
Cassini	O
,	O
New	O
Horizons	O
,	O
Mars	O
Science	O
Laboratory	O
,	O
and	O
Mars	O
2020	O
)	O
would	O
have	O
offered	O
an	O
advantage	O
of	O
a	O
fourfold	O
reduction	O
in	O
PuO2	O
fuel	O
,	O
at	O
half	O
the	O
mass	O
of	O
an	O
RTG	O
.	O
</s>
<s>
A	O
spacecraft	O
proposed	O
to	O
use	O
this	O
generator	O
was	O
the	O
TiME	O
boat-lander	O
mission	O
to	O
Titan	O
,	O
the	O
largest	O
moon	O
of	O
the	O
planet	O
Saturn	B-Device
,	O
with	O
a	O
launch	O
intended	O
for	O
January	O
2015	O
,	O
or	O
2023	O
.	O
</s>
<s>
In	O
February	O
2009	O
it	O
was	O
announced	O
that	O
NASA/ESA	O
had	O
given	O
Europa	O
Jupiter	O
System	O
Mission	O
(	O
EJSM/Laplace	O
)	O
mission	O
priority	O
ahead	O
of	O
the	O
Titan	O
Saturn	B-Device
System	O
Mission	O
(	O
TSSM	O
)	O
,	O
which	O
could	O
have	O
included	O
TiME	O
.	O
</s>
