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SAR Interferometry of aquatic bodies, Haiti
Up left: Combination of the successive ascending SLC images
that is acquired on ? & with iis temporal
baseline. Parallel baseline is estimated to be 380.36m
Up right: Combination of the successive ascending SLC
images that is acquired on 4 ; © with iis temporal
baseline. Parallel baseline is estimated to be 113.01m
International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XXXIX-B7, 2012
XXII ISPRS Congress, 25 August — 01 September 2012, Melbourne, Australia
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Figure 7: Liqui-InSAR for Western Haiti coastal zone
obtained by the use of Liqui-InSAR technique that provides a clear
insight on the topic is accessible to those who are interested in the
subject and submit their request to the author at the contact address
provided in this paper.
Figure 7 shows how the sea surface behaves differently in the
evening of March 14 and April 2010. The uplift of the sea surface
on March 14 is 2.5 times bigger than the uplift for April 24. The
speed of the movement is also assessable by counting the number
of fringes and multiplying it to the half of the wavelength value.
Although it is an instantaneous estimation, it reflects the sea
surface attitude which could be useful for coastal zones synoptic
monitoring and management. In Figure 8 the images produced
using InSAR technique give an estimation of the sea surface
attitude in South Western Haiti on January 19, 2010. The shape of
the sea surface deformation is considerable. The deviation from
straight lines suggests an uplift of the sea water eastward. (Tarikhi,
2010b) In Figure 9 the interferometric products of the combination
of 18 SLC images of the coastal zone in South Western Turkey are
compared. The sea surface attitude and the shape of the surface
instantaneous deformation and its speed differs from one pair to
other but the direction of the sea surface movement seems to be the
same for all pairs in different times in monthly and yearly basis.
It is noteworthy that using Liqui-InSAR for short baselines as we
examined, almost for the majority of the image pairs for whichthe
interferometric combination is successful, when the order of
master and slave images are changed respectively, the results looks
a bit different. It could be because of the fact that the incidence of
specific phenomena could lead to the variety of phenomena that we
might not be able to detect or cover them. When we move to past,
then some phenomena's effect may be disregarded that could
probably lead to the different result with what we experienced
normally. In other words the slave image contains the information
about the phenomena that might be initiated from or the sequence
of the phenomena which information contained in the master
image. However, the reciprocal case does not necessarily apply in
general. The reason could in addition to what explained above be
due to the procedure that is used for co-registration of the master
and slave images. For co-registration the applied software searches
the points in the slave image that have correlation with the
corresponding points on the master image. When we change the
sequence then the selection process could not be necessarily the
same as what carried out in the earlier case.
master image
SAR Interferometric combination of the ascending image pair of 20100119 00104 13 and
20100119 00104. 14 (January 19, 2010, Haiti, a week after earthquake of January 12, 2010)
Virtual Baseline: 44972.56m
Parallel Baseline: 1087.7im
Normal Baseline: 44959.41m
Temporal Baseline: 15s
Figure 8: Liqui-InSAR for South-Western Haiti coastal zone
