Alkali element background reduction in laser ICP-MS
Geosci. Instrum. Method. Data Syst., 4, 75-80, doi:10.5194/gi-4-75-2015, 2015
Does temperature affect the accuracy of vented pressure transducer in fine-scale water level measurement?
Summary: This paper discussed the effect of temperature on the accuracy of submersible strain gauge pressure transducers. The results show that rapid change of temperature introduces errors in the water level reading while the absolute temperature is also related to the sensor errors. The former is attributed to venting and the latter is attributed to temperature compensation effects in the strain gauges. Performance tests are necessary before field deployment to ensure the data quality.
Geosci. Instrum. Method. Data Syst., 4, 65-73, doi:10.5194/gi-4-65-2015, 2015
A new instrument to measure plot-scale runoff
Summary: 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.
Geosci. Instrum. Method. Data Syst., 4, 57-64, doi:10.5194/gi-4-57-2015, 2015
COSIMA data analysis using multivariate techniques
Summary: COSIMA, an advanced TOF-SIMS instrument measuring the mass spectrum of dust grains collected at comet P67 by the ROSETTA spacecraft, is predicted to encounter complex mixtures of minerals and organic compounds. To extract information from this data set, we have developed a multivariate technique tested on laboratory measurements made by an identical instrument under controlled conditions. We have shown that minerals can be identified and separated with high level of confidence.
Geosci. Instrum. Method. Data Syst., 4, 45-56, doi:10.5194/gi-4-45-2015, 2015
A new mobile and portable scanning lidar for profiling the lower troposphere
Geosci. Instrum. Method. Data Syst., 4, 35-44, doi:10.5194/gi-4-35-2015, 2015
Image georectification and feature tracking toolbox: ImGRAFT
Summary: The use of time-lapse cameras is becoming an ever more popular method of observing changes in the natural environment. This study provides an overview of the newly developed Image GeoRectification And Feature Tracking toolbox (ImGRAFT). The paper outlines the main function of the toolbox and describes each of the key processes needed to transform a pair of terrestrial time-lapse images into a velocity field. The tool is presented using a case study of glacier surface motion at Engabreen, Norway.
Geosci. Instrum. Method. Data Syst., 4, 23-34, doi:10.5194/gi-4-23-2015, 2015
Bed conduction impact on fiber optic distributed temperature sensing water temperature measurements
Geosci. Instrum. Method. Data Syst., 4, 19-22, doi:10.5194/gi-4-19-2015, 2015
Calibration of QM-MOURA three-axis magnetometer and gradiometer
Summary: In situ magnetometry is key for planetary mineralogy. However, since magnetic instrumentation is considered secondary in Mars and Moon landers and rovers, magnetometers have often very restricted envelopes of mass, volume and power, and consequently limited functionality. In this work, it is presented the capability of MOURA small magnetometer and gradiometer to open a wide and novel scientific research on Mars mineralogy and paleomagnetism through the very complex calibration process.
Geosci. Instrum. Method. Data Syst., 4, 1-18, doi:10.5194/gi-4-1-2015, 2015