Accuracy of the Residual Delay Absolute Phase Algorithm
Jet Propulsion Laboratory, MS 300-319
California
4800
algorithm is used
the
constant
a model
compare it to the results for
algorithm’s
of
to
1
a for
a r c r e q u i r e d t o
and elevation.
obtained by by shift, and the
phase difference between antennae.
coordinate, one in channel 2
signals received in between
a
l o o k d i r e c t i o n, .
from
> 1, so that
“wraps” observed
the phase is
w h i c h i n c o n s t a n t by
at to
[4] allow the
I the “Residual
this the
a b s o l u t e of
r e m o v i n g t h e of w h i c h i s
entire
filter [1] [3] with a
each, 2) by a factor of two, 3)
2
to
is
each sub-patch. in this way, the delay of 0(1/100) the accuracy
with which this
due to one cycle of phase is
w i t h
which this
is reduced by
N, over
and also depends
of the correlation peak. One
is the total correlation cycles, as:
(2)
Of
a
Gaussian statistics for the delay
p o o r s w i t c h
isolation.
to compute the accuracy of the
a
data sets to which the
followings
pair of
to
Introduction, 3)
for
error, whit.1) is
t o
f o r c a d ]
(3)
w h e r e
are
variables
for
fit to
all of the
h=
will fail if
prediction for accuracy to that
For each pate.11
processor records as a series of
distributed both across
used to verify
is for a relatively rugged a
run. average
correlation of the the latter
figure as a data. ‘1’here
arc
the average
Nevertheless, the two
of the is observed to
use the accuracy to
level that a of answer, i.e., the
correct cycles:
(4)
3 the accuracy is for
as will
arc
caption for from
this criterion, however the
that by
system may very accurately for
and
a s d a t a
performed at the Jet Propulsion Laboratory,
of
with the
a
tutorial review. 1981.
[2]
of 1978.
[4] in
conference
and Richard M. syn-
thetic aperture radar observations. 1986.
A.
and 940,
of for
to the data
of accuracy (diamonds) of phase
sub-patch 8 from land to ocean.
3. required to obtain
Five
5.3
M a p p e r10.0
5.3 11.25 MHz, Swath 87%)
are
figure.
Of correlation
I
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