Articles | Volume 4, issue 2
Geosci. Instrum. Method. Data Syst., 4, 215–226, 2015
https://doi.org/10.5194/gi-4-215-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Geosci. Instrum. Method. Data Syst., 4, 215–226, 2015
https://doi.org/10.5194/gi-4-215-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article 24 Nov 2015
Research article | 24 Nov 2015
Development of the very long-range cosmic-ray muon radiographic imaging technique to explore the internal structure of an erupting volcano, Shinmoe-dake, Japan
T. Kusagaya and H. K. M. Tanaka
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Hiroyuki K. M. Tanaka and Michinori Ohshiro
Geosci. Instrum. Method. Data Syst., 5, 427–435, https://doi.org/10.5194/gi-5-427-2016, https://doi.org/10.5194/gi-5-427-2016, 2016
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Application of elementary particle physics to the measurements of rock overburden density structures that might be directly applicable to natural resources and undiscovered cave explorations, and even to searching for hidden chambers in historic architectural structures.
Related subject area
Ground-based instruments
Daytime and nighttime aerosol optical depth implementation in CÆLIS
A geophone-based and low-cost data acquisition and analysis system designed for microtremor measurements
A monitoring system for spatiotemporal electrical self-potential measurements in cryospheric environments
Evaluating the suitability of the consumer low-cost Parrot Flower Power soil moisture sensor for scientific environmental applications
A new borehole electromagnetic receiver developed for CSEM methods
Development of a new distributed hybrid seismic and electrical data acquisition station based on system-on-a-programmable-chip technology
Development of a distributed hybrid seismic–electrical data acquisition system based on the Narrowband Internet of Things (NB-IoT) technology
A low-cost autonomous rover for polar science
Shallow geophysical techniques to investigate the groundwater table at the Great Pyramids of Giza, Egypt
Apsu: a wireless multichannel receiver system for surface nuclear magnetic resonance groundwater investigations
Development of high-precision distributed wireless microseismic acquisition stations
Links between annual surface temperature variation and land cover heterogeneity for a boreal forest as characterized by continuous, fibre-optic DTS monitoring
The development and test research of a multichannel synchronous transient electromagnetic receiver
Evaluating four gap-filling methods for eddy covariance measurements of evapotranspiration over hilly crop fields
Tri-axial square Helmholtz coil system at the Alibag Magnetic Observatory: upgraded to a magnetic sensor calibration facility
Intercomparison of cosmic-ray neutron sensors and water balance monitoring in an urban environment
Development of a full-waveform voltage and current recording device for multichannel transient electromagnetic transmitters
Making better sense of the mosaic of environmental measurement networks: a system-of-systems approach and quantitative assessment
Fog-based automatic true north detection for absolute magnetic declination measurement
Automated mineralogy based on micro-energy-dispersive X-ray fluorescence microscopy (µ-EDXRF) applied to plutonic rock thin sections in comparison to a mineral liberation analyzer
U.S. Geological Survey experience with the residual absolutes method
The magnetic observatory on Tatuoca, Belém, Brazil: history and recent developments
Several years of experience with automatic DI-flux systems: theory, validation and results
In situ vector calibration of magnetic observatories
A low-power data acquisition system for geomagnetic observatories and variometer stations
Method for processing XCP data with improved accuracy
Analysis of the technical biases of meteor video cameras used in the CILBO system
Video cascade accumulation of the total solar eclipse on Svalbard 2015
Vehicular-networking- and road-weather-related research in Sodankylä
Auroral meridian scanning photometer calibration using Jupiter
A coincidence detection system based on real-time software
Seismic observations at the Sodankylä Geophysical Observatory: history, present, and the future
Data flow of spectral UV measurements at Sodankylä and Jokioinen
Soil moisture sensor calibration for organic soil surface layers
The Sodankylä in situ soil moisture observation network: an example application of ESA CCI soil moisture product evaluation
A new high-precision and low-power GNSS receiver for long-term installations in remote areas
A compact receiver system for simultaneous measurements of mesospheric CO and O3
Snowstorm at the geomagnetic observatory
A new instrument to measure plot-scale runoff
Auroral all-sky camera calibration
An autonomous adaptive low-power instrument platform (AAL-PIP) for remote high-latitude geospace data collection
A rapid deployment instrument network for temporarily monitoring volcanic SO2 emissions – a case study from Telica volcano
A double-station meteor camera set-up in the Canary Islands – CILBO
Muon radiography for exploration of Mars geology
A new automatic method for estimating the peak auroral emission height from all-sky camera images
Autonomous distributed temperature sensing for long-term heated applications in remote areas
A novel technique to detect special nuclear material using cosmic rays
Performance of thermal conductivity probes for planetary applications
Design and operation of a field telescope for cosmic ray geophysical tomography
Ramiro González, Carlos Toledano, Roberto Román, David Fuertes, Alberto Berjón, David Mateos, Carmen Guirado-Fuentes, Cristian Velasco-Merino, Juan Carlos Antuña-Sánchez, Abel Calle, Victoria E. Cachorro, and Ángel M. de Frutos
Geosci. Instrum. Method. Data Syst., 9, 417–433, https://doi.org/10.5194/gi-9-417-2020, https://doi.org/10.5194/gi-9-417-2020, 2020
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Aerosol optical depth (AOD) is a parameter widely used in remote sensing for the characterization of atmospheric aerosol particles. AERONET was created by NASA for aerosol monitoring as well as satellite and model validation. The University of Valladolid (UVa) has managed an AERONET calibration center since 2006. The CÆLIS software tool, developed by UVa, was created to manage the data generated by AERONET photometers. The AOD algorithm in CÆLIS is developed and validated in this work.
Ozkan Kafadar
Geosci. Instrum. Method. Data Syst., 9, 365–373, https://doi.org/10.5194/gi-9-365-2020, https://doi.org/10.5194/gi-9-365-2020, 2020
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In this paper, a low-cost, computer-aided, and geophone-based system designed to record, monitor, and analyze three-component microtremor data is presented. This system has several features such as a 200 Hz sampling frequency, text data format, and data analysis tools. The developed software undertakes many tasks such as communication between the external hardware and computer, transferring, monitoring, and recording the seismic data to a computer, and interpretation of the recorded data.
Maximilian Weigand, Florian M. Wagner, Jonas K. Limbrock, Christin Hilbich, Christian Hauck, and Andreas Kemna
Geosci. Instrum. Method. Data Syst., 9, 317–336, https://doi.org/10.5194/gi-9-317-2020, https://doi.org/10.5194/gi-9-317-2020, 2020
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In times of global warming, permafrost is starting to degrade at alarming rates, requiring new and improved characterization approaches. We describe the design and test installation, as well as detailed data quality assessment, of a monitoring system used to capture natural electrical potentials in the subsurface. These self-potential signals are of great interest for the noninvasive investigation of water flow in the non-frozen or partially frozen subsurface.
Angelika Xaver, Luca Zappa, Gerhard Rab, Isabella Pfeil, Mariette Vreugdenhil, Drew Hemment, and Wouter Arnoud Dorigo
Geosci. Instrum. Method. Data Syst., 9, 117–139, https://doi.org/10.5194/gi-9-117-2020, https://doi.org/10.5194/gi-9-117-2020, 2020
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Soil moisture plays a key role in the hydrological cycle and the climate system. Although soil moisture can be observed by the means of satellites, ground observations are still crucial for evaluating and improving these satellite products. In this study, we investigate the performance of a consumer low-cost soil moisture sensor in the lab and in the field. We demonstrate that this sensor can be used for scientific applications, for example to create a dataset valuable for satellite validation.
Sixuan Song, Ming Deng, Kai Chen, Muer A, and Sheng Jin
Geosci. Instrum. Method. Data Syst. Discuss., https://doi.org/10.5194/gi-2019-37, https://doi.org/10.5194/gi-2019-37, 2020
Revised manuscript accepted for GI
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Current borehole receivers only measure a single parameter of the magnetic field component, which does not meet the special requirements of controlled source electromagnetic methods.This study proposes a borehole electromagnetic receiver which realizes multi-component synchronous acquisition of adding the vertical electric field component. Results of the experiments show that the design has the performance of low noise and wide band and that high quality CSEM signals were obtained.
Qisheng Zhang, Wenhao Li, Feng Guo, Zhenzhong Yuan, Shuaiqing Qiao, and Qimao Zhang
Geosci. Instrum. Method. Data Syst., 8, 241–249, https://doi.org/10.5194/gi-8-241-2019, https://doi.org/10.5194/gi-8-241-2019, 2019
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Complex and harsh exploration environments have put forward higher requirements for traditional geophysical exploration methods and instruments. In this study, a new distributed seismic and electrical hybrid acquisition station is developed and it can achieve high-precision hybrid acquisition of seismic and electrical data. The synchronization precision of the acquisition station is better than 200 ns and the maximum low-power data transmission speed is 16 Mbps along a 55 m cable.
Wenhao Li, Qisheng Zhang, Qimao Zhang, Feng Guo, Shuaiqing Qiao, Shiyang Liu, Yueyun Luo, Yuefeng Niu, and Xing Heng
Geosci. Instrum. Method. Data Syst., 8, 177–186, https://doi.org/10.5194/gi-8-177-2019, https://doi.org/10.5194/gi-8-177-2019, 2019
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The nonuniqueness of geophysical inversions, which is based on a single geophysical method, is a long–standing problem in geophysical exploration. This paper developed a distributed, multi–channel, high–precision data acquisition system. It can achieve high–precision hybrid acquisition of seismic–electrical data and monitor the real–time quality of data acquisition processes using NB–IoT technology. The equivalent input noise is 0.5 μV and the synchronization accuracy is within 200 ns.
Andrew O. Hoffman, Hans Christian Steen-Larsen, Knut Christianson, and Christine Hvidberg
Geosci. Instrum. Method. Data Syst., 8, 149–159, https://doi.org/10.5194/gi-8-149-2019, https://doi.org/10.5194/gi-8-149-2019, 2019
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We present the design considerations and deployment of an autonomous modular terrestrial rover for ice-sheet exploration that is inexpensive, easy to construct, and allows for instrumentation customization. The rover proved capable of driving over 20 km on a single charge with a drawbar pull of 250 N, which is sufficient to tow commercial ground-penetrating radars. Due to its low cost, low power requirements, and simple modular design, mass deployments of this rover design are practicable.
Sharafeldin M. Sharafeldin, Khalid S. Essa, Mohamed A. S. Youssef, Hakan Karsli, Zein E. Diab, and Nilgun Sayil
Geosci. Instrum. Method. Data Syst., 8, 29–43, https://doi.org/10.5194/gi-8-29-2019, https://doi.org/10.5194/gi-8-29-2019, 2019
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Integrated geophysical techniques (ERT, SSR, and GPR) along the conducted profiles at the Great Pyramids of Giza have been successfully used to investigate the groundwater table and support hazard mitigation. The groundwater table elevation is 15 m under the Great Sphinx, which is safe, and at the Nazlet El-Samman it is 16–17 m.
Lichao Liu, Denys Grombacher, Esben Auken, and Jakob Juul Larsen
Geosci. Instrum. Method. Data Syst., 8, 1–11, https://doi.org/10.5194/gi-8-1-2019, https://doi.org/10.5194/gi-8-1-2019, 2019
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This paper introcudes the design workflow and test approaches of a surface-NMR receiver. But the method and technqiues, for instance, signal loop, acqusition board, GPS synchronization, and Wi-Fi network, could also be employed in other geophysical instruments.
Shuaiqing Qiao, Hongmei Duan, Qisheng Zhang, Qimao Zhang, Shuhan Li, Shenghui Liu, Shiyang Liu, Yongqing Wang, Shichu Yan, Wenhao Li, and Feng Guo
Geosci. Instrum. Method. Data Syst., 7, 253–263, https://doi.org/10.5194/gi-7-253-2018, https://doi.org/10.5194/gi-7-253-2018, 2018
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In this study, a high-precision distributed wireless microseismic acquisition system has been designed for oil and gas exploration. The system design, which was based on the ADS1274 chip manufactured by TI, made full use of the four channels of the chip to collect vibration signals in three directions and one electrical signal, respectively. Furthermore, the acquisition system used GPS and WIFI technologies to achieve distributed wireless acquisition.
Kazuyuki Saito, Go Iwahana, Hiroki Ikawa, Hirohiko Nagano, and Robert C. Busey
Geosci. Instrum. Method. Data Syst., 7, 223–234, https://doi.org/10.5194/gi-7-223-2018, https://doi.org/10.5194/gi-7-223-2018, 2018
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A DTS system, using fibre-optic cables as a temperature sensor, measured surface and subsurface temperatures at a boreal forest underlain by permafrost in the interior of Alaska for 2 years every 30 min at 0.5-metre intervals along 2.7 km to monitor the daily and seasonal temperature changes, whose temperature ranges between −40 ºC in winter and 30 ºC in summer. This instrumentation illustrated characteristics of temperature variations and snow pack dynamics under different land cover types.
Fanqiang Lin, Xuben Wang, Kecheng Chen, Depan Hu, Song Gao, Xue Zou, and Cai Zeng
Geosci. Instrum. Method. Data Syst., 7, 209–221, https://doi.org/10.5194/gi-7-209-2018, https://doi.org/10.5194/gi-7-209-2018, 2018
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The main purpose of this paper is to introduce a receiver system for the synchronous acquisition of multiple electromagnetic signals in transient electromagnetic prospecting to achieve multiparameter and multichannel synchronous reception. The reliability, practicability, and data validity of the receiver were verified by different kinds of testing. It can be used for the reception of pseudorandom signals and distributed 3-D data, which can improve geophysical exploration efficiency.
Nissaf Boudhina, Rim Zitouna-Chebbi, Insaf Mekki, Frédéric Jacob, Nétij Ben Mechlia, Moncef Masmoudi, and Laurent Prévot
Geosci. Instrum. Method. Data Syst., 7, 151–167, https://doi.org/10.5194/gi-7-151-2018, https://doi.org/10.5194/gi-7-151-2018, 2018
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To provide reliable time series of evapotranspiration, we evaluated the performances of four different gap-filling methods when tailored to conditions of hilly crop fields. The tailoring consisted of splitting the time series beforehand on the basis of upslope and downslope winds. The obtained accuracies on evapotranspiration after gap filling were comparable to those previously reported over flat and mountainous terrains, and they were better with the most widely used gap-filling method.
Prasanna Mahavarkar, Jacob John, Vijay Dhapre, Varun Dongre, and Sachin Labde
Geosci. Instrum. Method. Data Syst., 7, 143–149, https://doi.org/10.5194/gi-7-143-2018, https://doi.org/10.5194/gi-7-143-2018, 2018
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The authors have successfully recommissioned an unused tri-axial Helmholtz coil system. The system now serves as a national facility for calibrating magnetometers.
Martin Schrön, Steffen Zacharias, Gary Womack, Markus Köhli, Darin Desilets, Sascha E. Oswald, Jan Bumberger, Hannes Mollenhauer, Simon Kögler, Paul Remmler, Mandy Kasner, Astrid Denk, and Peter Dietrich
Geosci. Instrum. Method. Data Syst., 7, 83–99, https://doi.org/10.5194/gi-7-83-2018, https://doi.org/10.5194/gi-7-83-2018, 2018
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Cosmic-ray neutron sensing (CRNS) is a unique technology to monitor water storages in complex environments, non-invasively, continuously, autonomuously, and representatively in large areas. However, neutron detector signals are not comparable per se: there is statistical noise, technical differences, and locational effects. We found out what it takes to make CRNS consistent in time and space to ensure reliable data quality. We further propose a method to correct for sealed areas in the footrint.
Xinyue Zhang, Qisheng Zhang, Meng Wang, Qiang Kong, Shengquan Zhang, Ruihao He, Shenghui Liu, Shuhan Li, and Zhenzhong Yuan
Geosci. Instrum. Method. Data Syst., 6, 495–503, https://doi.org/10.5194/gi-6-495-2017, https://doi.org/10.5194/gi-6-495-2017, 2017
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We believe that our study full-waveform voltage and current recording device for MTEM transmitters makes a significant contribution to the literature because this full-waveform recording device can be used to monitor the high-power, full-waveform voltages and currents of MTEM transmitters. It has high precision, finer edge details, low noise, and other advantages. Hence, it can be used for real-time recording and transmission to the receiver for coherent demodulation.
Peter W. Thorne, Fabio Madonna, Joerg Schulz, Tim Oakley, Bruce Ingleby, Marco Rosoldi, Emanuele Tramutola, Antti Arola, Matthias Buschmann, Anna C. Mikalsen, Richard Davy, Corinne Voces, Karin Kreher, Martine De Maziere, and Gelsomina Pappalardo
Geosci. Instrum. Method. Data Syst., 6, 453–472, https://doi.org/10.5194/gi-6-453-2017, https://doi.org/10.5194/gi-6-453-2017, 2017
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The term system-of-systems with respect to observational capabilities is frequently used, but what does it mean and how can it be assessed? Here, we define one possible interpretation of a system-of-systems architecture that is based upon demonstrable aspects of observing capabilities. We develop a set of assessment strands and then apply these to a set of atmospheric observational networks to decide which observations may be suitable for characterising satellite platforms in future work.
Alexandre Gonsette, Jean Rasson, Stephan Bracke, Antoine Poncelet, Olivier Hendrickx, and François Humbled
Geosci. Instrum. Method. Data Syst., 6, 439–446, https://doi.org/10.5194/gi-6-439-2017, https://doi.org/10.5194/gi-6-439-2017, 2017
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Absolute magnetic measurements require the vertical and the geographic north as reference directions. We present here a novel system able to measure the direction of the magnetic field and of the vertical and true north. A design of a north seeker is proposed that takes into account sensor bias as well as misalignment errors. Different methods are derived from this model and measurement results are presented. A measurement test at high latitude is also shown.
Wilhelm Nikonow and Dieter Rammlmair
Geosci. Instrum. Method. Data Syst., 6, 429–437, https://doi.org/10.5194/gi-6-429-2017, https://doi.org/10.5194/gi-6-429-2017, 2017
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This work describes a new approach to use fast X-ray fluorescence mapping as a tool for automated mineralogy applied on thin sections of plutonic rocks. Using a supervised classification of the spectral information, mineral maps are obtained for modal mineralogy and image analysis. The results are compared to a conventional method for automated mineralogy, which is scanning electron microscopy with mineral liberation analyzer, showing a good overall accuracy of 76 %.
E. William Worthington and Jürgen Matzka
Geosci. Instrum. Method. Data Syst., 6, 419–427, https://doi.org/10.5194/gi-6-419-2017, https://doi.org/10.5194/gi-6-419-2017, 2017
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We have compared two methods of performing Absolute observations of the Earth's magnetic field. The newer, Residual method was evaluated for use at USGS geomagnetic observatories and compared with measurements using the traditional Null method. A mathematical outline of the Residual method is presented, including more precise conversions of the Declination angles to nanoTeslas (nT). Results show that the Residual method is better than the Null method, especially at high latitude.
Achim Morschhauser, Gabriel Brando Soares, Jürgen Haseloff, Oliver Bronkalla, José Protásio, Katia Pinheiro, and Jürgen Matzka
Geosci. Instrum. Method. Data Syst., 6, 367–376, https://doi.org/10.5194/gi-6-367-2017, https://doi.org/10.5194/gi-6-367-2017, 2017
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We report on the history and recent developments of the Tatuoca magnetic observatory in Brazil. This observatory is located close to the geomagnetic equator and within a region of strong main field dynamics. Starting from 2015, we have installed new instrumentation and a new datalogger system. In the paper, we also comment on the challenges of doing absolute measurements at the geomagnetic equator.
Antoine Poncelet, Alexandre Gonsette, and Jean Rasson
Geosci. Instrum. Method. Data Syst., 6, 353–360, https://doi.org/10.5194/gi-6-353-2017, https://doi.org/10.5194/gi-6-353-2017, 2017
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In this paper, we give some background on calibration and verification of our automatic DI-flux instrument and then compare the automatic absolute magnetic measurements
with the human-made and discuss the advantages and disadvantages of automatic measurements.
Alexandre Gonsette, Jean Rasson, and François Humbled
Geosci. Instrum. Method. Data Syst., 6, 361–366, https://doi.org/10.5194/gi-6-361-2017, https://doi.org/10.5194/gi-6-361-2017, 2017
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We present a novel method for calibrating magnetic observatories. We show how magnetometer baselines can highlight a possible calibration error. We also provide a method based on high-frequency automatic absolute measurements. This method determines a transformation matrix for correcting raw data suffering from scale factor and orientation errors. We finally present a practical case where covered data have been successfully compared to those coming from a reference magnetometer.
Achim Morschhauser, Jürgen Haseloff, Oliver Bronkalla, Carsten Müller-Brettschneider, and Jürgen Matzka
Geosci. Instrum. Method. Data Syst., 6, 345–352, https://doi.org/10.5194/gi-6-345-2017, https://doi.org/10.5194/gi-6-345-2017, 2017
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A modern geomagnetic observatory is expected to record geomagnetic data with high stability, high resolution, and high reliability. Also, geomagnetic observatories may be located in remote areas, requiring low power consumption and simple maintenance. Here, we present a new data logger system that was designed to meet these criteria. This system is based on a Raspberry Pi embedded PC and includes a modular C++ software package which can be adapted to specific observatory setups.
Xinyue Zhang, Qisheng Zhang, Xiao Zhao, Qimao Zhang, Shenghui Liu, Shuhan Li, and Zhenzhong Yuan
Geosci. Instrum. Method. Data Syst., 6, 209–215, https://doi.org/10.5194/gi-6-209-2017, https://doi.org/10.5194/gi-6-209-2017, 2017
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In this study, we propose a more accurate method for calculating the current velocity from the nanovolt-scale current-induced electric field as measured using an expendable current profiler (XCP). In order to confirm the accuracy of the proposed data processing method, a sea test was performed, wherein ocean current/electric field data were collected from the sea surface to a depth of 1000 m using an XCP.
Thomas Albin, Detlef Koschny, Sirko Molau, Ralf Srama, and Björn Poppe
Geosci. Instrum. Method. Data Syst., 6, 125–140, https://doi.org/10.5194/gi-6-125-2017, https://doi.org/10.5194/gi-6-125-2017, 2017
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The Canary Islands Long-Baseline Observatory (CILBO) is a stereoscopic camera setup on the Canary Islands Tenerife and La Palma. Both cameras observe the same volume in the sky to determine high-precision orbits of entering meteoroids. Both cameras are identical; however they show different brightness or velocity distributions of the observed meteors. This work analyses different observational bias effects to determine and understand, e.g. camera pointing or observation time-dependent effects.
Fred Sigernes, Pål Gunnar Ellingsen, Noora Partamies, Mikko Syrjäsuo, Pål Brekke, Silje Eriksen Holmen, Arne Danielsen, Bernt Olsen, Xiangcai Chen, Margit Dyrland, Lisa Baddeley, Dag Arne Lorentzen, Marcus Aleksander Krogtoft, Torstein Dragland, Hans Mortensson, Lisbeth Smistad, Craig J. Heinselman, and Shadia Habbal
Geosci. Instrum. Method. Data Syst., 6, 9–14, https://doi.org/10.5194/gi-6-9-2017, https://doi.org/10.5194/gi-6-9-2017, 2017
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The total solar eclipse event on Svalbard on 20 March 2015 gave us a unique opportunity to image the upper parts of the Sun's atmosphere. A novel image accumulation filter technique is presented that is capable of distinguishing features such as loops, spicules, plumes, and prominences from intense and blurry video recordings of the chromosphere.
Timo Sukuvaara, Kari Mäenpää, and Riika Ylitalo
Geosci. Instrum. Method. Data Syst., 5, 513–520, https://doi.org/10.5194/gi-5-513-2016, https://doi.org/10.5194/gi-5-513-2016, 2016
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FMI's combined road weather station (RWS) and roadside unit (RSU) in Sodankylä is a unique research platform combining very advanced road weather measurements with a versatile collection of the most common wireless communication methodologies used in a vehicular environment. Together with harsh Arctic road weather conditions it represents an incomparable development environment and pilot RWS station within the field of intelligent transport systems and vehicular networking.
Brian J. Jackel, Craig Unick, Fokke Creutzberg, Greg Baker, Eric Davis, Eric F. Donovan, Martin Connors, Cody Wilson, Jarrett Little, M. Greffen, and Neil McGuffin
Geosci. Instrum. Method. Data Syst., 5, 493–512, https://doi.org/10.5194/gi-5-493-2016, https://doi.org/10.5194/gi-5-493-2016, 2016
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In order to compare auroral observations, it is necessary to ensure that all instruments are properly calibrated. This can be difficult to achieve with different instruments operated for extended intervals at remote field sites under harsh conditions. Astronomical sources can be used for independent absolute calibration procedures. Under ideal conditions Jupiter is an excellent source, as it can provide more light than the brightest star. We use Jupiter to calibrate an auroral MSP network.
Sindulfo Ayuso, Juan José Blanco, José Medina, Raúl Gómez-Herrero, Oscar García-Población, and Ignacio García Tejedor
Geosci. Instrum. Method. Data Syst., 5, 437–449, https://doi.org/10.5194/gi-5-437-2016, https://doi.org/10.5194/gi-5-437-2016, 2016
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A new software coincidence method is shown which can be used to replace conventional coincidence detection with the same effectiveness. Our easy-to-build trial prototype has cost EUR 150 and replaces at least three conventional coincidence modules (over EUR 6000). This has allowed us to carry out experiments that we could not before because of the lack of resources. It detects coincidence, stores timestamp data and transfers them to a PC, allowing easier adjustments and simpler interconnections.
Elena Kozlovskaya, Janne Narkilahti, Jouni Nevalainen, Riitta Hurskainen, and Hanna Silvennoinen
Geosci. Instrum. Method. Data Syst., 5, 365–382, https://doi.org/10.5194/gi-5-365-2016, https://doi.org/10.5194/gi-5-365-2016, 2016
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The paper describes the history and the present state of instrumental seismic observations at the University of Oulu and Sodankylä Geophysical Observatory in northern Finland that started in 1950s. This includes both seismic observations at permanent seismic stations and temporary seismic experiments by portable seismic equipment. We describe the instrumentation and major research topics of seismic group at the SGO and discuss the plans for their future development.
Jakke Sakari Mäkelä, Kaisa Lakkala, Tapani Koskela, Tomi Karppinen, Juha Matti Karhu, Vladimir Savastiouk, Hanne Suokanerva, Jussi Kaurola, Antti Arola, Anders Vilhelm Lindfors, Outi Meinander, Gerrit de Leeuw, and Anu Heikkilä
Geosci. Instrum. Method. Data Syst., 5, 193–203, https://doi.org/10.5194/gi-5-193-2016, https://doi.org/10.5194/gi-5-193-2016, 2016
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We describe the steps that are used at the Finnish Meteorological Institute (FMI) to process spectral ultraviolet (UV) radiation measurements made with its three Brewer spectrophotometers, located in Sodankylä (67° N) and Jokioinen (61° N). Multiple corrections are made to the data in near-real time and quality control is also performed automatically. Several data products are produced, including the near-real-time UV index and various daily dosages, and submitted to databases.
Simone Bircher, Mie Andreasen, Johanna Vuollet, Juho Vehviläinen, Kimmo Rautiainen, François Jonard, Lutz Weihermüller, Elena Zakharova, Jean-Pierre Wigneron, and Yann H. Kerr
Geosci. Instrum. Method. Data Syst., 5, 109–125, https://doi.org/10.5194/gi-5-109-2016, https://doi.org/10.5194/gi-5-109-2016, 2016
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At the Finnish Meteorological Institute in Sodankylä and the Danish Center for Hydrology, calibration functions for organic surface layers were derived for two in situ soil moisture sensors to be used in the validation of coarse-resolution soil moisture from satellites and land surface models. There was no clear difference in the data from a variety of humus types, strengthening confidence that these calibrations are applicable over a wide range of conditions as encountered in the large areas.
Jaakko Ikonen, Juho Vehviläinen, Kimmo Rautiainen, Tuomo Smolander, Juha Lemmetyinen, Simone Bircher, and Jouni Pulliainen
Geosci. Instrum. Method. Data Syst., 5, 95–108, https://doi.org/10.5194/gi-5-95-2016, https://doi.org/10.5194/gi-5-95-2016, 2016
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A comprehensive, distributed network of in situ measurement stations gathering information on soil moisture has been set up in recent years at the Finnish Meteorological Institute's (FMI) Sodankylä Arctic research station. The network is used as a tool to evaluate the validity of satellite retrievals of soil properties. We present the soil moisture observation network and the results of comparisons of top layer soil moisture between 2012 and 2014 against ESA CCI product soil moisture retrievals.
David H. Jones, Carl Robinson, and G. Hilmar Gudmundsson
Geosci. Instrum. Method. Data Syst., 5, 65–73, https://doi.org/10.5194/gi-5-65-2016, https://doi.org/10.5194/gi-5-65-2016, 2016
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Long-term records from high-precision GPS receivers are essential for studying geophysical movement. Existing, commercially available, precision GPS receivers are not intended for long-term, autonomous deployment. We have designed a GPS receiver that is better suited for this application. In this paper, we discuss the receiver design and compare its performance with that of some of the commercially available receivers.
P. Forkman, O. M. Christensen, P. Eriksson, B. Billade, V. Vassilev, and V. M. Shulga
Geosci. Instrum. Method. Data Syst., 5, 27–44, https://doi.org/10.5194/gi-5-27-2016, https://doi.org/10.5194/gi-5-27-2016, 2016
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Microwave radiometry is the only ground-based technique that can provide vertical profiles of gases in the middle atmosphere both day and night, and even during cloudy conditions. Today these measurements are performed at relatively few sites, more simple and reliable instruments are required to make the measurement technique more widely spread. In this study a compact double-sideband frequency-switched radiometer system for simultaneous observations of mesospheric CO and O3 is presented.
R. Čop
Geosci. Instrum. Method. Data Syst., 4, 155–159, https://doi.org/10.5194/gi-4-155-2015, https://doi.org/10.5194/gi-4-155-2015, 2015
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The Sinji Vrh Geomagnetic Observatory is situated on Gora above Ajdovščina, a highland karst plateau, in the southwestern part of Slovenia, and operates in exceptional geological and meteorological conditions due to its location. The measurements intended to determine the value of influences of weather fronts on the local magnetic field were carried out in January 2013. This article presents the results of these measurements, showing how the snowstorm induced changes in earth's magnetic field.
R. D. Stewart, Z. Liu, D. E. Rupp, C. W. Higgins, and J. S. Selker
Geosci. Instrum. Method. Data Syst., 4, 57–64, https://doi.org/10.5194/gi-4-57-2015, https://doi.org/10.5194/gi-4-57-2015, 2015
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We present a new instrument for measuring surface runoff rates ranging from very low (~0.05L min-1) to high (300L min-1, with much higher rates possible depending on the device configuration). The device is economical, simple, rugged, accurate and requires little maintenance (the system is self-emptying and contains no moving parts). We have successfully used this instrument in long-term monitoring studies and expect that it will appeal to other scientists studying runoff processes.
F. Sigernes, S. E. Holmen, D. Biles, H. Bjørklund, X. Chen, M. Dyrland, D. A. Lorentzen, L. Baddeley, T. Trondsen, U. Brändström, E. Trondsen, B. Lybekk, J. Moen, S. Chernouss, and C. S. Deehr
Geosci. Instrum. Method. Data Syst., 3, 241–245, https://doi.org/10.5194/gi-3-241-2014, https://doi.org/10.5194/gi-3-241-2014, 2014
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A two-step procedure to calibrate the spectral sensitivity of auroral all-sky (fish-eye) cameras is outlined. First, center pixel response is obtained by the use of a Lambertian surface and a standard tungsten lamp. Second, all-sky flat-field correction is carried out with an integrating sphere.
C. R. Clauer, H. Kim, K. Deshpande, Z. Xu, D. Weimer, S. Musko, G. Crowley, C. Fish, R. Nealy, T. E. Humphreys, J. A. Bhatti, and A. J. Ridley
Geosci. Instrum. Method. Data Syst., 3, 211–227, https://doi.org/10.5194/gi-3-211-2014, https://doi.org/10.5194/gi-3-211-2014, 2014
V. Conde, D. Nilsson, B. Galle, R. Cartagena, and A. Muñoz
Geosci. Instrum. Method. Data Syst., 3, 127–134, https://doi.org/10.5194/gi-3-127-2014, https://doi.org/10.5194/gi-3-127-2014, 2014
D. Koschny, F. Bettonvil, J. Licandro, C. v. d. Luijt, J. Mc Auliffe, H. Smit, H. Svedhem, F. de Wit, O. Witasse, and J. Zender
Geosci. Instrum. Method. Data Syst., 2, 339–348, https://doi.org/10.5194/gi-2-339-2013, https://doi.org/10.5194/gi-2-339-2013, 2013
S. Kedar, H. K. M. Tanaka, C. J. Naudet, C. E. Jones, J. P. Plaut, and F. H. Webb
Geosci. Instrum. Method. Data Syst., 2, 157–164, https://doi.org/10.5194/gi-2-157-2013, https://doi.org/10.5194/gi-2-157-2013, 2013
D. K. Whiter, B. Gustavsson, N. Partamies, and L. Sangalli
Geosci. Instrum. Method. Data Syst., 2, 131–144, https://doi.org/10.5194/gi-2-131-2013, https://doi.org/10.5194/gi-2-131-2013, 2013
A.-M. Kurth, N. Dawes, J. Selker, and M. Schirmer
Geosci. Instrum. Method. Data Syst., 2, 71–77, https://doi.org/10.5194/gi-2-71-2013, https://doi.org/10.5194/gi-2-71-2013, 2013
C. Thomay, P. Baesso, D. Cussans, J. Davies, P. Glaysher, S. Quillin, S. Robertson, C. Steer, C. Vassallo, and J. Velthuis
Geosci. Instrum. Method. Data Syst., 1, 235–238, https://doi.org/10.5194/gi-1-235-2012, https://doi.org/10.5194/gi-1-235-2012, 2012
E. S. Hütter and N. I. Kömle
Geosci. Instrum. Method. Data Syst., 1, 53–75, https://doi.org/10.5194/gi-1-53-2012, https://doi.org/10.5194/gi-1-53-2012, 2012
N. Lesparre, J. Marteau, Y. Déclais, D. Gibert, B. Carlus, F. Nicollin, and B. Kergosien
Geosci. Instrum. Method. Data Syst., 1, 33–42, https://doi.org/10.5194/gi-1-33-2012, https://doi.org/10.5194/gi-1-33-2012, 2012
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