In this paper, a low-cost, computer-aided and geophone-based system designed to record, monitor and analyze the three-component microtremor data, is presented. This system has several features such as 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 computer, and interpretation of the recorded data.

One of the four Galilean moons of Jupiter, Europa, is one of the most promising places in the solar system to find life outside Earth. For this reason, the space science community is currently focused on exploring it. One of the main difficulties of such task is the harsh radiation environment, caused by the radiation belts of Jupiter. In this paper we present results for a magnetic fields sensor being exposed to radiation levels similar to those expected at the surface of Europa.

We propose a gradiometer based technique to clean multi-sensor magnetic field data acquired onboard spacecraft. The technique takes advantage on the fact that the maximum variance direction of many AC disturbances onboard spacecraft does not change in time. We apply the proposed technique to the SOSMAG instrument onboard GeoKompsat-2A. We analyse the performance and limitations of the technique and discuss in detail how various disturbances are removed.

Combining short time forecast models, standardized interfaces to a wide range of environment detectors and a flexible user access interface the CITYZER concept provides decision making authorities and private citizens with reliable information about the near-future development of critical environmental parameters like air quality and rain. The system can be easily adapted to different areas or different parameters. Alarms for critical situations can be set and used to support authority decisions.

Soil gas flux describes the movement of various gases either to or from the ground. The ability to efficiently detect changes in soil gas flux has the potential to better understand and detect leakage from Under Carbon Capture and Storage (CCS) schemes, diffuse degassing in volcanic and geothermal areas and greenhouse-gas emissions. Traditional chamber-based techniques may require weeks of fieldwork to to assess a site. We present a new method to speed up assessment of diffuse leakage.

This paper presents a quasi-distributed thrust measurement system based on an optical frequency domain reflectometer (OFDR). This OFDR sensing system achieved a spatial resolution of 20 cm using a 500 m test fiber (the resolution of an OTDR sensing system is generally approximately 1 m), the maximum measurement pressure can reach 1.059 MPa and the maximum relative error is 8.9 %. This system has good engineering application prospects in the safety monitoring field.

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 of a monitoring system used to capture natural electrical potentials in the subsurface to investigate water flow in the non- or partially frozen subsurface. We find that extensive data quality assessment is required for reliable data recording, potentially paving the way for inclusion in risk models.

Geographic coordinates (latitude and longitude) are widely used in geospatial applications and terrains are often defined by regular grids in geographic coordinates. However, because of convergence of lines of longitude near the poles there is oversampling in the latitude (zonal) direction. Also, there is no standard way of defining a hierarchy of grids to consistently deal with data having different spatial resolutions. The proposed Global Geographic Grid System solves both problems.

We developped a method to acquire dense point clouds with a low-cost Velodyne Puck lidar system, without using expensive GNSS positioning or IMU. Our setting consists in mounting the lidar on a motor to continuously change the scan direction, which leads to a significant increase in the point cloud density. The system was compared with a more expensive system based on IMU registration and a SLAM algorithm. The alignment between acquisitions with those two systems is within a distance of 2 cm.