<s>
The	O
spatial	O
resolution	O
of	O
the	O
InSAR	O
map	O
for	O
C-band	O
satellites	O
like	O
Sentinel-1	B-Algorithm
without	O
multi-looking	O
is	O
around	O
20	O
meters	O
.	O
</s>
<s>
However	O
,	O
the	O
long	O
revisit	O
time	O
of	O
Sentinel-1	B-Algorithm
(	O
temporal	O
resolution	O
,	O
12	O
days	O
)	O
at	O
the	O
moment	O
is	O
the	O
main	O
disadvantage	O
of	O
this	O
technique	O
from	O
the	O
meteorologists	O
 '	O
side	O
.	O
</s>
<s>
Terrain	O
:	O
TRAIN	O
consists	O
of	O
MATLAB	B-Language
and	O
shell	O
scripts	O
and	O
can	O
be	O
used	O
for	O
the	O
output	O
of	O
most	O
InSAR	O
software	O
.	O
</s>
<s>
PyAPS	O
:	O
This	O
module	O
has	O
been	O
written	O
based	O
on	O
python	B-Language
3	I-Language
and	O
can	O
measure	O
the	O
stratified	O
atmosphere	O
noise	O
for	O
interferograms	O
.	O
</s>
<s>
RAiDER	O
:	O
This	O
python	B-Language
package	O
implements	O
the	O
raytracing	O
method	O
to	O
measure	O
and	O
reduce	O
tropospheric	O
noise	O
.	O
</s>
<s>
GACOS	O
:	O
This	O
package	O
in	O
MATLAB	B-Language
generates	O
high-resolution	O
atmospheric	O
data	O
and	O
then	O
separates	O
stratified	O
and	O
turbulent	O
signals	O
to	O
remove	O
tropospheric	O
noise	O
.	O
</s>
<s>
ICAMS	O
:	O
This	O
python	B-Language
module	O
uses	O
ERA5	O
data	O
and	O
considers	O
stochastic	O
spatial	O
properties	O
of	O
the	O
troposphere	O
(	O
ICAMS	O
)	O
to	O
remove	O
tropospheric	O
noise.This	O
package	O
calculates	O
the	O
delays	O
along	O
the	O
LOS	O
direction	O
.	O
</s>
