Integrated marine gravimetric system. Development and operation results

Краснов, А. А.; Nesenyuk, L.P.; Peshekhonov, V. G.; Соколов, А. В.; Elinson, L. S.

doi:10.1134/s2075108711020052

Cited by 18 publications

(7 citation statements)

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“…The scientific instruments flown in the ICEGRAV campaigns included gravimeters of the Lacoste and Romberg S-type, as modified by ZLS Corporation (Valliant 1991), supplemented in 2012-13 with a Chekan-AM gravimeter (Krasnov et al 2011). In addition, magnetic, radar and LiDAR sensors were flown.…”

Section: Icegrav Airborne Geophysics Campaigns 2010-13mentioning

confidence: 99%

Exploring the Recovery Lakes region and interior Dronning Maud Land, East Antarctica, with airborne gravity, magnetic and radar measurements

Forsberg

Olesen

Ferraccioli

et al. 2017

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Long-range airborne geophysical measurements were carried out in the ICEGRAV campaigns, covering hitherto unexplored parts of interior East Antarctica and part of the Antarctic Peninsula. The airborne surveys provided a regional coverage of gravity, magnetic and icepenetrating radar measurements for major Dronning Maud Land ice stream systems, from the grounding lines up to the Recovery Lakes drainage basin, and filled in major data voids in Antarctic data compilations, such as AntGP for gravity data, ADMAP for magnetic data and BEDMAP2 for ice thickness data and the sub-ice topography. We present the first maps of gravity, magnetic and ice thickness data and bedrock topography for the region and show examples of bedrock topography and basal reflectivity patterns. The 2013 Recovery Lakes campaign was carried out with a British Antarctic Survey Twin Otter aircraft operating from the Halley and Belgrano II stations, as well as a remote field camp located at the Recovery subglacial Lake B site. Gravity measurements were the primary driver for the survey, with two airborne gravimeters (Lacoste and Romberg and Chekan-AM) providing measurements at an accuracy level of around 2 mGal r.m.s., supplementing GOCE (Gravity Field and Steady-State Ocean Circulation Explorer) satellite data and confirming an excellent sub-milligal agreement between satellite and airborne data at longer wavelengths.Gold Open Access: This article is published under the terms of the CC-BY 3.0 license.

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Section: Icegrav Airborne Geophysics Campaigns 2010-13mentioning

confidence: 99%

Exploring the Recovery Lakes region and interior Dronning Maud Land, East Antarctica, with airborne gravity, magnetic and radar measurements

Forsberg

Olesen

Ferraccioli

et al. 2017

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“…This platform ensures that the sensitive axis is held in the vertical direction. The details of the instrumentation and the data processing routine recommended by the manufacturer can be found in Krasnov et al (2011a and2011b) and in the Chekan-AM Operating Manual. The raw measurements of the Chekan-AM gravimeter are integer numbers of pixels detected on two CCD photodetectors which represent (by two light beams) the relative positions of the two sensor masses in terms of angles.…”

Section: Raw Chekan-am Measurementsmentioning

confidence: 99%

Gravity Measurements along Commercial Ferry Lines in the Baltic Sea and Their Use for Geodetic Purposes

et al. 2020

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In 2017 and 2018 GFZ performed two gravimetry campaigns on commercial ferries in the Baltic Sea.The nature of such "non-dedicated" campaigns is different from "dedicated" campaigns that are performed on research vessels with tracks planned according to gravity measurement needs. The nondedicated campaigns use non-survey vessels or survey vessels running for other purposes such as hydrographic measurements, which may require additional corrections. To assess the usefulness of non-dedicated campaigns, we analysed gravity measurements collected on two commercial ferries as part of the EU funded FAMOS project. Besides the typical marine gravimetry corrections, we also investigated the corrections for the vertical accelerations due to the ship's movement and the dynamical effect due to the cross-coupling between horizontal and vertical acceleration components.Taking the latter two corrections into account partly leads to slight improvements, but our results also demonstrate that the standard processing without the two corrections, as used in most of the dedicated campaigns, already delivers good quality end products that fulfil the requirements of a typical marine gravimetry survey with an uncertainty of about 1 mGal. Our findings suggest that gravimetry campaigns on commercial ferries can be used to complement dedicated marine gravimetry campaigns and contribute to geodetic purposes.

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“…Currently, measurement accuracy of the latest LaCoste & Romberg-type and KSS31-type marine gravimeter reaches ±1.0 mGal under relatively poor sea conditions. Take into consideration the influences of individual errors (zero drift correction, Eotvos correction, inaccurate location determination, and spatial correction) in marine measurement, an accuracy of ±1.0 mGal–±2.0 mGal may be attained [ 37 ]. These allow for the use of the gravimeter and marine gravity reference map in underwater-aided navigation.…”

Section: Characteristics Of the Marine Gravity Reference Map And Tmentioning

confidence: 99%

Characteristics of Marine Gravity Anomaly Reference Maps and Accuracy Analysis of Gravity Matching-Aided Navigation

Wang

Chai

et al. 2017

Sensors

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The variation of a marine gravity anomaly reference map is one of the important factors that affect the location accuracy of INS/Gravity integrated navigation systems in underwater navigation. In this study, based on marine gravity anomaly reference maps, new characteristic parameters of the gravity anomaly were constructed. Those characteristic values were calculated for 13 zones (105°–145° E, 0°–40° N) in the Western Pacific area, and simulation experiments of gravity matching-aided navigation were run. The influence of gravity variations on the accuracy of gravity matching-aided navigation was analyzed, and location accuracy of gravity matching in different zones was determined. Studies indicate that the new parameters may better characterize the marine gravity anomaly. Given the precision of current gravimeters and the resolution and accuracy of reference maps, the location accuracy of gravity matching in China’s Western Pacific area is ~1.0–4.0 nautical miles (n miles). In particular, accuracy in regions around the South China Sea and Sulu Sea was the highest, better than 1.5 n miles. The gravity characteristic parameters identified herein and characteristic values calculated in various zones provide a reference for the selection of navigation area and planning of sailing routes under conditions requiring certain navigational accuracy.

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Integrated marine gravimetric system. Development and operation results

Cited by 18 publications

References 0 publications

Exploring the Recovery Lakes region and interior Dronning Maud Land, East Antarctica, with airborne gravity, magnetic and radar measurements

Exploring the Recovery Lakes region and interior Dronning Maud Land, East Antarctica, with airborne gravity, magnetic and radar measurements

Gravity Measurements along Commercial Ferry Lines in the Baltic Sea and Their Use for Geodetic Purposes

Characteristics of Marine Gravity Anomaly Reference Maps and Accuracy Analysis of Gravity Matching-Aided Navigation

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