Presentation on theme: "HYSWEEP ® Overview. S/V Bufe - USACE Sault Ste. Marie Area Office Full Coverage Survey of a DC3."— Presentation transcript:
HYSWEEP ® Overview
S/V Bufe - USACE Sault Ste. Marie Area Office Full Coverage Survey of a DC3.
Multibeam vs. Single Beam The Good: Saves time: Multibeam provides high resolution and full coverage of the seafloor. The data is more accurate for volume computations. The Bad: More data to work with and more time to process. With additional sensors needed, there are more error sources. Example of using a Multibeam where previous work was with single beam sonar. An Obstruction was easily missed The Ugly: Plane is lost entirely in single beam contours.
Multibeam Sonar Types Beamforming Systems: Forms beams using an array of transducer elements.Forms beams using an array of transducer elements. Each beam has a Maximum Response Angle, giving the direction of the beam.Each beam has a Maximum Response Angle, giving the direction of the beam. Interferometric Systems: AKA bathymetric sidescan. Forms beams from phase angle of backscatter.AKA bathymetric sidescan. Forms beams from phase angle of backscatter. Multiple Transducer Systems: Widely spaced transducers pointing down.Widely spaced transducers pointing down. Seabat 8101 Atlas Fansweep 20 Ross Sweep System
Support Sensors Motion reference (MRU): Measures boat heave, pitch and roll.Measures boat heave, pitch and roll. Heading: Using a gyro or dual GPS antenna array.Using a gyro or dual GPS antenna array. Sound Speed Sensor & Profiler: Sensor: Sound speed at sonar head.Sensor: Sound speed at sonar head. Profiler: Sound speed through water column.Profiler: Sound speed through water column.
HYSWEEP ® MB Interfaces Atlas: Bomasweep, Fansweep, Hydrosweep MD2, MD/30, MD/50, DS. Benthos: C3D. BlueView: MB2250/1350. EdgeTech: Furuno: HS Series. GeoAcoustics: GeoSwath. Imagenex: Delta T, DT100, Dual Delta T ISTech Kongsberg: MS1000, M3 Klein: 5000 Odom: ES3, Dual ES3, Echoscan II, Miniscan, MB1 (dual). R2Sonic: SONIC 2020, 2022, Reson: Seabat 71xx, 81xx, 900x. Ross: Smart Sweep. SEA: SWATHplus. Seabeam: 2100, 1000 Series, 3000 Series. Simrad (Kongsberg): EM 302, 710, 1002, 2000, 2040, 3000, 3002, 3002 Dual Head, SM2000. Tritech: SeaKing. WASSP: Multibeam sonar. Multibeam Sonars Available in HYSWEEP ® : At last count, 50 different multibeam and multiple transducer systems are supported.
HYSWEEP ® Topographic Lasers MDL: DynascanMDL: Dynascan Optech: ILRISOptech: ILRIS REIGL: LMS and V SeriesREIGL: LMS and V Series Laser Scanners: REIGL V-SeriesOptech ILRIS MDL Dynascan
HYSWEEP ® Driver Reference Applanix: POS/MV, WaveMaster. Coda Octopus: F180. IXSEA: OCTANS. JAE: JM7531. KVH: Gyrotrac. Novatel: SPAN Odim: MVP (Moving Velocity Profiler - HYPACK Survey driver). Seatex: MRUx. SG Brown: 1000S. TSS: 335B, DMS. *** - Other sensors available via the generic and NMEA drivers. Motion / Heading / Other Sensors:
Installation Motion Sensor: Mount at boat CG. Alternate location: As close as possible to boat CG.Mount at boat CG. Alternate location: As close as possible to boat CG. Sonar mounting (in order of preference): Hull mount at boat CG.Hull mount at boat CG. Moon pool at boat CG.Moon pool at boat CG. Pole mount; bow or over the side.Pole mount; bow or over the side. Moon Pool Pole Mount: Bow Pole Mount: Over the Side
Calibration Tools HYSWEEP® Patch Test Pitch, roll and yaw alignment. Find out EXACTLY where the sonar is pointing.Pitch, roll and yaw alignment. Find out EXACTLY where the sonar is pointing. Account for GPS latency if needed.Account for GPS latency if needed. HYSWEEP® Bar Check Much like single beam - verify draft measurement.Much like single beam - verify draft measurement. Multibeam systems need calibration! Why we need to patch test.Bar check window.
Survey Preparation Planned Survey Lines Make parallel lines spaced for target coverage.Make parallel lines spaced for target coverage. Sometimes difficult with multibeam - coverage changes with depth.Sometimes difficult with multibeam - coverage changes with depth. Coverage Matrix Alternative to planned lines.Alternative to planned lines. “Paint the Bottom” until there are no gaps.“Paint the Bottom” until there are no gaps. Large depth changes make line planning difficult. Alternative is “Painting the Bottom”.
HYSWEEP ® Survey Features Data collection and logging. Targeting and coverage mapping. TPU and other QC checks visible in 16 real time dislaysData collection and logging. Targeting and coverage mapping. TPU and other QC checks visible in 16 real time dislays Refraction Errors seen in real time Refraction occurs at changes in sound velocity.Refraction occurs at changes in sound velocity. Errors when SV profile doesn’t match conditions – estuaries can be troublesome.Errors when SV profile doesn’t match conditions – estuaries can be troublesome. Look for smiling or frowning sweeps.Look for smiling or frowning sweeps. Same take-off angle, different ray paths. HYSWEEP® 3-D Seafloor You don’t want to see this profile when the bottom is flat.
Multibeam Post Processing In HYSWEEP ® Corrections / Review / Edit with MBMAX32 or MBMAX64 editors.Corrections / Review / Edit with MBMAX32 or MBMAX64 editors. Tide and sound speed corrections. Graphical data review. Manual and automatic data cleaning. Automated data cleaning with CUBE.Automated data cleaning with CUBE. Sweep editing window. After MBMAX, Back Into HYPACK ® Sounding Selection: MAPPER gridding program and DATA REDUCTION program to minimize number of XYZ points.Sounding Selection: MAPPER gridding program and DATA REDUCTION program to minimize number of XYZ points. Modeling, volumes, sections, contours with HYPACK ® TIN MODEL.Modeling, volumes, sections, contours with HYPACK ® TIN MODEL. Editing and viewing with CLOUDEditing and viewing with CLOUD Visualization and fly through with HYPACK ® 3DTV.Visualization and fly through with HYPACK ® 3DTV.