<s>
A	O
whisk	O
broom	O
or	O
spotlight	O
sensor	O
,	O
also	O
known	O
as	O
an	O
across-track	O
scanner	O
,	O
is	O
a	O
technology	O
for	O
obtaining	O
satellite	B-Application
images	O
with	O
optical	O
cameras	O
.	O
</s>
<s>
In	O
a	O
whisk	O
broom	O
sensor	O
,	O
a	O
mirror	O
scans	O
across	O
the	O
satellite	B-Application
’s	O
path	O
(	O
ground	O
track	O
)	O
,	O
reflecting	O
light	O
into	O
a	O
single	O
detector	B-Application
which	O
collects	O
data	O
one	O
pixel	B-Algorithm
at	O
a	O
time	O
.	O
</s>
<s>
Whisk	B-Algorithm
broom	I-Algorithm
scanners	I-Algorithm
have	O
the	O
effect	O
of	O
stopping	O
the	O
scan	O
,	O
and	O
focusing	O
the	O
detector	B-Application
on	O
one	O
part	O
of	O
the	O
swath	O
width	O
.	O
</s>
<s>
Because	O
the	O
detector	B-Application
is	O
only	O
focused	O
on	O
a	O
subsection	O
of	O
the	O
full	O
swath	O
at	O
any	O
time	O
,	O
it	O
typically	O
has	O
a	O
higher	O
resolution	O
than	O
a	O
push	O
broom	O
design	O
for	O
the	O
same	O
size	O
of	O
scan	O
swath	O
.	O
</s>
<s>
All	O
sensors	B-Application
aboard	O
the	O
Landsat	O
series	O
of	O
satellites	B-Application
used	O
the	O
whisk	O
broom	O
design	O
until	O
Landsat	O
8	O
.	O
</s>
