Impact Subsea Launch ISD4000 Depth & Temperature Sensor

Impact Subsea is launching the ISD4000 survey grade Depth & Temperature sensor with optional integrated HMRU, providing the user with heading, pitch and roll values. Designed for ROV & AUV underwater applications, the ISD4000 offers a significant degree of capability, in a small form factor. With a 0.01% full scale depth measurement accuracy combined with a Temperature measurement accuracy of 0.01°C the ISD4000 is at the forefront of depth and temperature measurement technology. Compact and Endurable At only 8cm (3.1”) long, 4.5cm (1.8”) wide and weighing just 0.42kg (0.93lb) in air makes the ISD4000 a highly compact unit. This form... (read more)
2016-02-01 12:06:12

Magellan DG14 RTK GPS Board

The DG14 RTK offers high-precision in a low-cost GNSS unit. The DG14 RTK from Magellan is a sub-meter GNSS (GPS + SBAS) and Beacon receiver. DG14 RTK was developed to meet the needs of demanding high-precision applications for machine control, agriculture, aviation, military, unmanned aerial vehicles (UAVs), robotics, marine survey and navigation. DG14 RTK customers can choose from a fixed centimeter solution or a “flying RTK” decimeter solution. Because it offers an optimized mix of speed and accuracy, the decimeter mode makes DG14 RTK the perfect solution for customers who need decimeter accuracy but don’t want to spend the typical... (read more)
2007-05-25 03:22:20

Marine Motion Sensor

Kongsberg Maritimes has introduced a new member in its family of Motion Monitoring Units at Ocean Business 2015. The MRU 5+ MK-II is part of a range of MRUs for diverse marine applications including: motion compensation of multi-beam echo sounders, high speed craft motion control and damping systems, heave compensation of offshore cranes, dynamic positioning, hydro acoustic positioning, ship motion monitoring, ocean wave measurements and antenna motion compensation and stabilisation. The MRU 5+ MK-II uses a new sensing element (Coriolis force resonator) in the new design of integrated MEMS gyros. With less than 0.002° angle noise, and Angle Random Walk... (read more)
2015-04-18 12:03:00

Hydrolite Portable Echosounder

Hydrolite is a portable echosounder designed for the Army Dive Teams for saltwater use.     The device has 1 cm accuracy at 20 meters. Options include mounting hardware, GPS/Datalogger, Software and Heave/Pitch/Roll capability. The illustration shows a lake survey accomplished with this echosounder.   (read more)
2008-11-10 02:51:49

Sonardyne Motion Sensor Technology

Sonardyne International has launched a new marine Attitude Heading and Reference System (AHRS): Lodestar. Lodestar has been developed to overcome the problems associated with conventional sensor platforms. The Lodestar AHRS is a natural extension of the Sonardyne product range and has been developed for seamless integration with the company’s widely used LBL (Long BaseLine) and USBL (Ultra-Short BaseLine) acoustic positioning systems. It will also be welcomed by users with any requirement for motion compensation to support operations in any sea conditions. These are likely to include platform stabilisation, dynamic positioning, buoy monitoring, subsea construction and towfish and ROV/AUV operations. Available... (read more)
2007-04-05 02:42:46

North-seeking Gyrocompass

OceanTools has launched their MircoFOG north-seeking fibre-optic gyrocompass. MicroFOG delivers a wide range of parameters including heading, pitch, roll, rate information in three axes, accelerations and, shortly will include heave measurements.   The 3000m standard depth rated unit measures just 210mm in diameter and 360mm ling. The first production run of five units have already been sold with the US-based distributor SES.   (read more)
2008-04-02 08:59:52

RTK Tide Basics

One of the fastest emerging trends in hydrographic surveying is the use of the vertical component of RTK GPS to determine real-time water level corrections. There are currently several district offices of the US Army Corps of Engineers using this technique in place of conventional tide measurements.The main purpose of this article is to explain some of the basics behind the technique (without getting overly technical) and to point out some of the benefits and drawbacks to the method. The Basics Looking at Figure 1, let’s define the following terms: For simplicity, I am ignoring the heave-pitch-roll of the vessel... (read more)
2008-01-01 01:00:00

RTK Tide Basics

One of the fastest emerging trends in hydrographic surveying is the use of the vertical component of RTK GPS to determine real-time water level corrections. There are currently several district offices of the US Army Corps of Engineers using this technique in place of conventional tide measurements.The main purpose of this article is to explain some of the basics behind the technique (without getting overly technical) and to point out some of the benefits and drawbacks to the method. The Basics Looking at Figure 1, let’s define the following terms: For simplicity, I am ignoring the heave-pitch-roll of the vessel... (read more)
2008-01-01 01:00:00

Stand 51 for New DMS-500 Range

A new addition to the Teledyne TSS range of DMS motion sensors is being launched at the Ocean Business exhibition, Stand S1. The DMS-500 range is being developed specifically to meet the needs of users who require a high-end motion sensor with Ethernet connectivity, but do not require the subsea-rated housings that typify Teledyne TSS products.     The result will be a complete range of conservatively-priced sensors that incorporate a number of advanced and innovative features for applications such as Dynamic Positioning (DP), wave height monitoring and structural stress monitoring. The versatile design means that the range will be... (read more)
2011-04-06 03:27:08

CUBE: Extended Applications

Many hydrographers consider the Combined Uncertainty and Bathymetry Estimator (CUBE) algorithm a useful aid in processing bathymetric data and ‘measuring’ survey quality. This paper discusses extending the use of CUBE to include determining multi-beam echo sounder (MBES) offset parameters and navigation offsets between overlapping survey lines. One critical process in MBES surveying is determining system offset parameters by conducting a patch-test. Roll offset is typically recognised by unrealistic bottom slopes. Pitch, time and yaw offsets are recognised by seafloor features appearing dis- placed when surveyed on different lines where survey speed and/or direction vary. Detecting displacements is difficult in shallow... (read more)
2008-01-01 01:00:00
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