Enhanced Functionality – Getting the best out of your system
Side Scan Sonar
Backscatter from most modern multibeam systems (called ‘snippets’) and/or true Side Scan Sonar data, is mosaiced in real-time, geo-referencing being performed using a flat bottom assumption, or, better still, using a full 3D terrain model. In addition to the waterfall display, this geo-referenced backscatter data, and/or data from dedicated side scan sonar sensors, is presented in real-time as a mosaic in one layer of the multi-layered sounding grid, itself one of the layers in the multi-layered Navigation Display. QINSy offers advanced real-time SSS target detection, meaning that SSS processing time is cut down to almost zero. A dedicated SSS data viewer supports loading, viewing and performing target detection is just seconds.
Used in many survey operations like pipe-laying, pipeline inspection, and buoy tendering for example, Eventing is a powerful feature in QINSy. Completely user-configurable, all events, and classes of events are defined in planning. Using the resultant Event Tablet online, events are easily generated with a single mouse click, with each event log stored in real-time.
Total Propagated Error
So that our users could qualify their data in real-time according to IHO S-44 provisions, QPS implemented TPE (Total Propagated Error) functionality, sometimes referred to as ‘error budget’. The TPE of a point is a measure of the accuracy to be expected for that point, when all relevant error sources are taken into account. For example, the TPE of a computed DTM point on the seafloor, comprises the propagation of the individual errors of the echosounder system, motion reference system, sound velocity system, positioning system, heading system, ships offset system and other systems which contribute to the total propagated error.
Advanced Dredging Functionality
Advanced dredging functionality to control and monitor dredging operations in real-time is available as an add-on module to QINSy Survey. The available sensors on board the dredger are integrated in QINSy and used to calculate not only the exact location of the dredge tool, but also perform TDS and production calculations.
The Profile Display is used to visualize in real-time, the dredge tool relative to the various DTM layers containing, for example, current survey depth and theoretical profile. The dredge tool object shape (dredge head, bucket, etc.) is viewable from different angles. The Profile display shows the distance between the object and each of the DTM layers with an update rate of up to 10 times per second.
The entire dredge process can also be monitored using the powerful real-time 3D display, employing multiple perspectives from different camera views. Hopper dredgers, cutter dredgers, backhoes and other dredging tools are seen moving in a 3D environment at the same time that the dredged depths are updating the multi-layer sounding grid, all in real-time.
Anchor Handling &Barge Monitoring
Advanced functionality is used to monitor tugboats relative to a rig/barge and the local environment from one location. Data transmission between rig/barge and tugboats ensures anchor pattern exchange between the vessels. A special Tugboat Display program, requiring no surveyor, runs on each tugboat, providing continuous geographic context of position and target information for the required task. For ease of use, anchor locations can all be positioned by click and drag of the mouse on the navigation display!
QINSy provides full support for the execution, monitoring and controlling of the OBC Seismic operation on both the recording, and the shooting, vessel. On the shooting vessel, QINSy provides general navigation, positioning of the on-bottom streamer by means of a USBL system, and interpolation of hydrophone group positions.
On board of the airgun vessel, QINSy is used for general navigation, triggering of airguns at predefined positions (including user defined preload) and positioning of airguns.
QINSy can export and merge navigation records from the shooting and recording vessel using the UKOOA P1/90 format.
Quality Management System
A Quality Management System (QMS) provides both surveyor and processor with full insight into the calibrations performed, and the settings used, from start of survey (calibrations) to end (validation of data). The following main features are recorded in the QMS:
• Start and end time of each survey line;
• Sound velocity profile;
• Alerts such as roll, pitch outside limits;
• Data cleaning tools and de-spiking used both on-line and off-line (Validator)
• Position check through Establishment Fix routine;
• Gyro and Height calibration;
• Tidal stations used in the Tide Processor;
• Comparison between a (single beam) reference line and another (single beam)survey line;
• Statistical information of data recorded in Sounding Grid
Speedy Processing – Data Validation, Editing, Calibration and Tide Reduction
Employing various real-time data cleaning tools and correcting for motion, tide and refraction, QINSy is designed to output almost final results at the time of data acquisition. Moreover, the many quality assurance functions equip the surveyor with tools to qualify results data in real-time. Starting with a cleaner, and thinner, data set effectively reduces time spent in post processing.
The QINSy Processing Manager
All XYZ files are listed in the QINSy Processing Manager, tabulated against a history of processes performed on each file. This provides a complete overview of the project processing status. Processing programs are launched from the Processing Manager:
• The Tide Definition and Processing utility supports various methods for tidal reduction.
• The Validator supports both manual and automated data cleaning including advanced 3D splined surface cleaning.
Powerful Side Scan Sonar Functionality
Side Scan Sonar data is viewed and processed with the Side Scan Sonar Viewer Program . It offers the same look and feel as the waterfall SSS Display used during data acquisition. Powerful target detection tools allow you to export targets and geo-referenced bitmaps to the QINSy Mapping database to provide a complete targets overview.
The QINSy Validator
Multibeam exploded the volume of point data and created data handling challenges both in the acquisition and processing phases. The QINSy Validator is probably the most powerful data-cleaning program on the market today. Inherently fast data access allows loading and viewing of millions of points in just seconds. The Validator has 4 different views, 3 of which can be opened simultaneously:
- Plan View
- Cross View
- Profile View
- 3D View
Multibeam calibration is interactive, and very easy, providing both manual and auto-calibration options. These tools calibrate for errors in:
Singlebeam and Multibeam Data Editing
Editing of singlebeam, or multibeam, has never been easier. A variety of automated cleaning algorithms are available:
• Apply On-line Flags • Clip Below /Clip Above
• Adaptive Clipping • Median and Mean
• Butterworth • 3D Spline Surface
• Multiply/Shift Despiker
The Validator adds fully automated pipeline detection features, such as:
• Top of Pipe Detection
• Bottom of Trench
• Mean Seabed Detection
DTMs, Profiles, Volumes, Chart Production and ENC ‘s
The QINSy ENC Production Platform 57 distinguishes itself from other approaches to electronic chart production platforms by its efficient way of data storage, and through the principle of semi-static base cells that are easily updated with highly dynamic bathymetric data. The bathymetric data is generated directly from the digital terrain model, itself updated constantly with new hydrographic survey data. This principle allows for a completely updated ENC cell ready for distribution within hours of survey completion. Since the system is built on open Oracle technology, it can be adapted and extended under the user’s own supervision. The user makes use of the newly developed ENC Qomposer, an ENC editor for conversion of data to and from the EPP-57.
Newer generations of multibeam echsounders dramatically increased the number of depth soundings, both in terms of number of beams, and in ping rate. Dual-head multibeam systems providing up to 20,000 depth measurements per second have become a reality. Despite this increase in data volumes, the QPS philosophy of producing almost final soundings in real-time remains effective. However, as always, there is still a need to validate the online results using off-line tools. The difference is that these ever increasing data volumes require a new offline data analyze tool, ready for the future.
Our new 3D data cleaning tool, called Qloud, is specially developed to handle extremely large areas of multibeam data and to perform statistical data cleaning using parameters such as Total Propagated Error (TPE) in algorithms like CUBE (developed by the Ocean Mapping Group at the University of New Hampshire) and the surface spline filter.
Qloud allows very fast scrolling through the data and instantaneous focusing on the problem areas.
QINSy Mapping is a powerful processing package for the marine surveying and construction industry.With its many task-specific macro utilities, the software performs all necessary calculations quickly and easily, produces plots, generates contours and spot soundings, and calculates precise volumes in just seconds. A dedicated add-on module is available to export depth contours and spot soundings directly into IHO S57 ENC vector chart format. The QINSy 3D Tool generates not only great looking images of the seafloor, but also realistic fly-through video clips ideal for client presentations.
[source : http://www.qps.nl]
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