1
.
In
the
1950
?
s
the
USA
and
the
Soviet
Union
developed
imagery
satellite
systems
that
were
____________________
____________________
in
the
1960
?
s
.
2
.
In
the
early
1970
?
s
the
emergence
of
____________________
____________________
begun
with
the
deployment
of
Landsat
-
1
and
Landsat
-
2
.
3
.
They
both
carried
____________________
____________________
(
MSS
)
that
acquired
____________________
____________________
images
(
80
-
meter
GSD
)
of
the
Earth
?
s
surface
.
4
.
The
acronym
GSD
refers
to
____________________
____________________
____________________
or
spatial
resolution
or
pixel
size
.
5
.
Landsat
-
1
and
Landsat
-
2
were
used
for
large
-
scale
civil
applications
such
as
____________________
____________________
and
resource
management
.
