<s>
Dwell	B-Algorithm
time	I-Algorithm
(	O
TD	O
)	O
in	O
surveillance	O
radar	B-Application
is	O
the	O
time	O
that	O
an	O
antenna	O
beam	O
spends	O
on	O
a	O
target	O
.	O
</s>
<s>
Dwell	B-Algorithm
time	I-Algorithm
is	O
calculated	O
by	O
:	O
</s>
