A 1.What formats does QTC MULTIVIEW? process?
Currently, QTC MULTIVIEW? processes data from Simrad EM3000, EM1002, EM120 and XTF from Reson Seabat 8101 and 8125 systems.
A 2.What options are necessary to process data from Reson 8101 and 8125?
The RESON multibeam system must have Option 33 (sidescan option) installed.
A 3.What hardware is required?
There is no hardware required or included. QTC MULTIVIEW? is software only. Howevere there are some recommended computer specifications for this software.
A 4.What components of the multibeam data does it process?
The multibeam backscatter images are processed. The waveforms are not processed.
A 5.Is it the same as QTC IMPACT??
No. QTC IMPACT? is for single beam echo sounder data and processes raw waveform data. However, the final processing steps for classification are the same in QTC IMPACT? and QTC MULTIVIEW?.
A 6.I am intending to use a Reson Seabat 8125 for mapping, the footprint at nadir position of this system will be about 19 cm by 8cm. Will QTC MULTIVIEW? be affected by this small insonified area, or does it do some averaging prior to classification?
Our classification relies on analyses of rectangular patches which are spread
across the image like a quilt. Each side of a rectangle has to be 2n+1
pixels long and minimum 9, thus 9, 17, 33, 65 ... . You can choose the rectangle
size to fit your situation. In any analysis, all the rectangles have to be the
same size. They can overlap or have spaces between them (please contact us to
find out how to do this).
If you have the the sidescan option for your 8125, you can have spatial
resolution as small as 9 x 9 image pixels. This may be a very small area. You
may want to choose 9 pixels along track and a larger number across track. With
this option, you would have a wide choice of spatial resolution.
Also, we can do classification using each beam footprint as a pixel. The
along-track resolution would be the same. Across-track you are more constrained
because there are only 240 beam footprints compared to thousands of image
pixels. Either way, you can choose the spatial resolution for the task at hand,
within these constraints. With good choices, you can avoid classifying regions
that are so small that minor differences determine the classes.
A 7.The multibeam system has a swath of 4 times the depth. Is this a problem?
No. Swath width being 4 times depth is quite normal with respect to multibeam systems.
A 8.In an area where there are boulders of 0.5 meters wide and steep slopes, will the program have problems?
Provided your multibeam system accurately resolves the depths along the slope, our grazing angle compensation routines should very adequately deal with the situation. This means that the multibeam needs to provide a series of depths along the slope, no just the top and the bottom for example. It is expected that the system would do this, so there should not be a significant problem. Our research team has spent a lot of time overcoming problems relating to range, depths / grazing angle, and are confident that we can provide good results in a region of such significant relief.
A 9.I am using Windows XP and getting intermittent error messages. The message is occuring when I try to open the program. The error message is "missing or invalid hardware key. Driver not installed. 12(0x000c)".
QTC licence protection module uses a hardware key (dongle) made by Rainbow Sentinel. Their web site references problems with Windows 2000 and XP. They recommend downloading their latest driver along with instructions on how to uninstall the old driver and install the new one. QTC uses the Sentinel Scribe and not the SuperPro. You should downloaded the driver "sentinel system driver v5.41" and follow the specified procedure. The Rainbow Sentinel url is http://www.rainbow.com/support/eu_support.htm. QTC MULTIVIEW does not have to be reinstalled.
