Laboratory Simulation and Measurement of Instrument Drift in Quartz-Resonant Pressure Gauges

Sasagawa, G. S.; Zumberge, M. A.; Cook, Matthew

doi:10.1109/access.2018.2873479

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…The pressure sensors are subjected to rapid changes between seafloor pressure (>10,000 kPa) and ambient (100 kPa) and our group was initially skeptical that the induced stresses would only affect the offset. Still, a series of tests in our own lab (Sasagawa et al., 2018) and by others (Wilcock et al., 2021) indicate that this may, in fact, hold for Paroscientific, Inc. quartz gauges. Still, for the longest term studies, it seems best to calibrate in situ with a pressure close to that being normally experienced by the gauge.…”

Section: Introductionmentioning

confidence: 72%

Drift Corrected Seafloor Pressure Observations of Vertical Deformation at Axial Seamount 2018–2021

Sasagawa

Zumberge

Cook

2023

Earth and Space Science

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The dynamic changes in seafloor volcanoes can be observed with seafloor geodetic methods. Seafloor pressure measurements serve as a proxy for detecting vertical deformation (Bürgmann & Chadwell, 2014). Axial Seamount is an active submarine volcano and is the focus of many earth, ocean and life sciences investigations. Fox (1993) initiated the first pressure observation; Chadwick et al. (2006) and Nooner and Chadwick (2009) performed repeated geodetic pressure surveys. Chadwick et al. (2012) hypothesized that the magmatic system was repeatable and predicted a time range for the next eruption; their forecast was validated in 2015.Seafloor geodetic pressure measurements are adversely affected by sensor drift (Polster et al., 2009). The drift cannot reliably be removed with on-shore calibration, averaging multiple instruments or extrapolating from past performance. One approach to estimate and remove the drift is to collect reference pressure measurements at stable seafloor site(s) during an epoch survey, using portable sensors carried by remotely operated vehicles (ROV); Chadwick et al., 2006, andStenvold et al., 2006 discuss pressure surveys in detail. This method is analogous to terrestrial optical leveling or relative gravimeter surveys. Geodetic pressure surveys are effective but require considerable ship time and ROV assets, which limit the temporal sampling frequency.Our drift mitigation approach uses in-situ calibration. First proposed by Munk et al. (1990), a deadweight tester (DWT) is used to apply a known and in principle, absolute reference pressure to a pressure sensor. The DWT is conceptually quite simple; a cylindrical piston of known area A and mass M is inserted into a closely fitting

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Section: Introductionmentioning

confidence: 72%

Drift Corrected Seafloor Pressure Observations of Vertical Deformation at Axial Seamount 2018–2021

Sasagawa

Zumberge

Cook

2023

Earth and Space Science

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“…The sensor drift of each gauge is calculated by comparing the internal casing pressure measured during the switch periods (“0”) to the stable barometer's pressure reading. Assuming the APG drift at low pressure (inside the housing) is the same at high pressure (e.g., when the valve opens to seafloor pressure), the respective calculated drift trends (Figure 4b) can be subtracted from the seafloor APG data for each POBS (Figure 4c)—an assumption previously inspected by laboratory tests switching between piston gauge and atmospheric calibrations (Sasagawa et al., 2018). Prior to this 2019 experiment, the POBS sensors had been successfully tested for two weeks offshore of Long Island, NY, but this was the first deployment of the POBS sensors on the seafloor with the aim of capturing vertical seafloor deformation.…”

Section: Pressure Data Processing Techniquesmentioning

confidence: 99%

Using Seafloor Geodesy to Detect Vertical Deformation at the Hikurangi Subduction Zone: Insights From Self‐Calibrating Pressure Sensors and Ocean General Circulation Models

et al. 2022

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Both deep and shallow slow slip events (SSEs) have been observed at subduction zones around the world, in a wide range of physical environments (Bürgmann, 2018;Saffer & Wallace, 2015;Schwartz & Rokosky, 2007). SSEs can release moment equivalent to that of an M > 7 earthquake, but the slip occurs at rates of millimeters to centimeters per day, and with durations of days to years. Continuous onshore Global Navigation Satellite System (GNSS) stations have provided the primary data sets to detect and resolve the distribution of slip in SSEs, but SSE slip on the shallow, offshore reaches of subduction thrusts is poorly resolved by onshore GNSS networks at most subduction margins (Williamson & Newman, 2018). SSEs play important roles in accommodating the plate

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A Thirty-Month Seafloor Test of the A-0-A Method for Calibrating Pressure Gauges

et al. 2021

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Geodetic observations in the oceans are important for understanding plate tectonics, earthquake cycles and volcanic processes. One approach to seafloor geodesy is the use of seafloor pressure gauges to sense vertical changes in the elevation of the seafloor after correcting for variations in the weight of the overlying oceans and atmosphere. A challenge of using pressure gauges is the tendency for the sensors to drift. The A-0-A method is a new approach for correcting drift. A valve is used to periodically switch, for a short time, the measured pressure from the external ocean to the inside of the instrument housing at atmospheric pressure. The internal pressure reading is compared to an accurate barometer to measure the drift which is assumed to be the same at low and high pressures. We describe a 30-months test of the A-0-A method at 900 m depth on the MARS cabled observatory in Monterey Bay using an instrument that includes two A-0-A calibrated pressure gauges and a three-component accelerometer. Prior to the calibrations, the two pressure sensors drift by 6 and 2 hPa, respectively. After the calibrations, the offsets of the corrected pressure sensors are consistent with each other to within 0.2 hPa. The drift corrected detided external pressure measurements show a 0.5 hPa/yr trend of increasing pressures during the experiment. The measurements are corrected for instrument subsidence based on the changes in tilt measured by the accelerometer, but the trend may include a component of subsidence that did not affect tilt. However, the observed trend of increasing pressure, closely matches that calculated from satellite altimetry and repeat conductivity, temperature and depth casts at a nearby location, and increasing pressures are consistent with the trend expected for the El Niño Southern Oscillation. We infer that the A-0-A drift corrections are accurate to better than one part in 105 per year. Additional long-term tests and comparisons with oceanographic observations and other methods for drift correction will be required to understand if the accuracy the A-0-A drift corrections matches the observed one part in 106 per year consistency between the two pressure sensors.

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Laboratory Simulation and Measurement of Instrument Drift in Quartz-Resonant Pressure Gauges

Cited by 3 publications

References 7 publications

Drift Corrected Seafloor Pressure Observations of Vertical Deformation at Axial Seamount 2018–2021

Drift Corrected Seafloor Pressure Observations of Vertical Deformation at Axial Seamount 2018–2021

Using Seafloor Geodesy to Detect Vertical Deformation at the Hikurangi Subduction Zone: Insights From Self‐Calibrating Pressure Sensors and Ocean General Circulation Models

A Thirty-Month Seafloor Test of the A-0-A Method for Calibrating Pressure Gauges

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