Blar i Institutt for elektroniske systemer på forfatter "Landrø, Martin"
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Acoustic and Elastic wave Exploration and Monitoring using Dense Passive Arrays
Rørstadbotnen, Robin André (Doctoral theses at NTNU;2023:278, Doctoral thesis, 2023)Passive recording systems have become increasingly popular and important in various marine acoustic and geophysics branches. Data from these systems provide valuable information and can be used in various applications, ... -
Acoustic signals in air and water generated by very shallow marine seismic sources: An experimental study
Wehner, Daniel; Svensson, U. Peter; Landrø, Martin (Peer reviewed; Journal article, 2020)When a marine seismic source, like an airgun, is fired close to the water surface the oscillating bubble interacts with the water–air interface. The main interest for seismic applications is how this effect impacts the ... -
Acoustically induced cavity cloud generated by air-gun arrays—Comparing video recordings and acoustic data to modeling
Khodabandeloo, Babak; Landrø, Martin (Journal article; Peer reviewed, 2018)For seismic air-gun arrays, ghost cavitation is assumed to be one of the main mechanisms for high-frequency signal generation. Ghost cavitation signals are weak for seismic frequencies (<300 Hz) and do not contribute to ... -
Average Qp and Qs estimation in marine sediments using a dense receiver array
Rørstadbotnen, Robin André; Landrø, Martin (Peer reviewed; Journal article, 2023) -
Characterizing the acoustic properties of the cavity cloud generated close to an air-gun array as a time-dependent effective medium
Khodabandeloo, Babak; Landrø, Martin (Journal article, 2018)A ghost cavity cloud consists of many small vapour cavities and appears above and around the air-guns in the source array a few milliseconds after the source is fired. Since there are dissolved gases and stable microbubbles ... -
Comparing the broadband acoustic frequency response of single, clustered and arrays of marine air guns
Landrø, Martin; Langhammer, Jan (Peer reviewed; Journal article, 2020)Field data acquired from a seismic vessel by a seabed hydrophone is used to analyze the broadband response (10 Hz to 62.5 kHz) for various source configurations: single air guns, clustered air guns, and a full array ... -
Distributed acoustic sensing and 4D seismic time-strain inversion for subsurface monitoring
Taweesintananon, Kittinat (Doctoral theses at NTNU;2023:280, Doctoral thesis, 2023)Subsurface monitoring plays an important role in utilising subsurface resources and preventing geologic hazards. This thesis comprises dissemination of the research in using seismic methods for subsurface monitoring. Here ... -
Distributed acoustic sensing for near-surface imaging using submarine telecommunication cable: A case study in the Trondheimsfjord, Norway
Taweesintananon, Kittinat; Landrø, Martin; Brenne, Jan Kristoffer; Haukanes, Aksel (Journal article; Peer reviewed, 2021) -
Distributed acoustic sensing of ocean-bottom seismo-acoustics and distant storms: A case study from Svalbard, Norway
Taweesintananon, Kittinat; Landrø, Martin; Potter, John Robert; Johansen, Ståle Emil; Rørstadbotnen, Robin Andre; Bouffaut, Léa; Kriesell, Hannah Joy; Brenne, Jan Kristoffer; Haukanes, Aksel; Schjelderup, Olaf; Storvik, Frode (Peer reviewed; Journal article, 2023)Distributed acoustic sensing (DAS) leverages an ocean-bottom telecommunication fiber-optic cable into a densely sampled array of strain sensors. We demonstrate DAS applications to passive acoustic monitoring (PAM) through ... -
Diving-wave time-lapse delay for CO2 thin layer detection
Martinez Guzman, Ricardo Jose; Vinje, Vetle; Stovas, Alexei; Mispel, Joachim; Ringrose, Philip Stefan; Duffaut, Kenneth; Landrø, Martin (Peer reviewed; Journal article, 2024)We have derived an analytical approximate expression to estimate the delay in diving seismic waves due to thin layers of CO2. The expression is valid for high frequencies and can be used to estimate the delay in diving ... -
Eavesdropping at the Speed of Light: Distributed Acoustic Sensing of Baleen Whales in the Arctic
Bouffaut, Léa; Taweesintananon, Kittinat; Kriesell, Hannah Joy; Rørstadbotnen, Robin André; Potter, John; Landrø, Martin; Johansen, Ståle Emil; Brenne, Jan Kristoffer; Haukanes, Aksel; Schjelderup, Olaf; Storvik, Frode (Peer reviewed; Journal article, 2022)In a post-industrial whaling world, flagship and charismatic baleen whale species are indicators of the health of our oceans. However, traditional monitoring methods provide spatially and temporally undersampled data to ... -
Estimating source signatures from source-over-spread marine seismic data
Helgebostad, Kristian; Landrø, Martin; Vinje, Vetle; Nilsen, Carl-Inge Colombo (Journal article; Peer reviewed, 2018)Recent developments in marine seismic acquisition include deploying a source vessel above a towed-streamer spread. We have developed an inversion algorithm to estimate source signatures for such acquisition configurations, ... -
Estimation of Temperature Profiles using Low-Frequency Distributed Acoustic Sensing from In-Well Measurements
Bradley, Nicholas Adam; Haavik, Kjetil Eik; Landrø, Martin (Peer reviewed; Journal article, 2023)Distributed fiber-optic sensing for in-well measurements is primarily used for monitoring purposes. Distributed acoustic sensing (DAS) is used to record acoustic disturbances and is sensitive to changes in strain, pressure, ... -
Feature Selection Based on Principal Component Regression for Underwater Source Localization by Deep Learning
Zhu, Xiaoyu; Dong, Hefeng; Salvo Rossi, Pierluigi; Landrø, Martin (Peer reviewed; Journal article, 2021)Underwater source localization is an important task, especially for real-time operation. Recently, machine learning methods have been combined with supervised learning schemes. This opens new possibilities for underwater ... -
Frequency-depth-dependent spherical reflection response from the sea surface - a transmission experiment
Wehner, Daniel; Landrø, Martin; Amundsen, Lasse; Westerdahl, Harald (Journal article; Peer reviewed, 2018)In academia and the industry, there is an increasing interest in generating and recording low seismic frequencies, which lead to better data quality, deeper signal penetration and can be important for full-waveform inversion. ... -
Gas flow through shallow sediments - A case study using passive and active seismic field data
Landrø, Martin; Wehner, Daniel; Vedvik, Noralf; Ringrose, Philip; Løhre, Nora Løw; Berteussen, Karl-Andreas (Journal article; Peer reviewed, 2019)Offshore Quaternary sediment sequences are generally weak and unconsolidated, and fluid flow through these rock formations is hard to predict or model. Surface flow observations, such as gas seeps, often appear random and ... -
Next generation geophysical sensing: exploring a new wave of geophysical technologies for the energy transition
Ringrose, Philip; Landrø, Martin; Potter, John; Eidsvik, Jo; Wienecke, Susann; Bouffaut, Léa; Oye, Volker; Dong, Hefeng; Elster, Anne C.; Johansen, Ståle Emil (Peer reviewed; Journal article, 2021) -
On low frequencies emitted by air guns at very shallow depths - An experimental study
Wehner, Daniel; Landrø, Martin; Amundsen, Lasse (Journal article; Peer reviewed, 2019)In marine seismic acquisition, the enhancement of frequency amplitudes below 5 Hz is of special interest because it improves imaging of the subsurface. The frequency content of the air gun, the most commonly used marine ... -
Quick clay monitoring using distributed acoustic sensing: A case study from Rissa, Norway
Rørstadbotnen, Robin Andre; Dong, Hefeng; Landrø, Martin; Duffaut, Kenneth; Growe, Kevin; Kakhkhorov, Umedzhon; Wienecke, Susann; Jacobsen, Joacim (Peer reviewed; Journal article, 2023)Quick clay avalanche is one of the most devastating landslide types worldwide. Hence, an early warning system is in demand to mitigate the fatal consequences caused by such events. To address this, distributed acoustic ... -
Repeatability of high-resolution 3D seismic data
Waage, Malin; Bünz, Stefan; Landrø, Martin; Plaza-Faverola, Andreia; Waghorn, Kate Alyse (Journal article; Peer reviewed, 2018)High-resolution 4D (HR4D) seismic data have the potential for improving the current state-of-the-art in detecting shallow (≤ 500 − 1000 m below seafloor) subsurface changes on a very fine scale (approximately 3–6 m). ...