To improve microwave satellite and airborne observation products in forest environments, a precise and reliable estimation of the permittivity of the trees is required. We developed a probe suitable to measure permittivity of tree trunks at L-Band in the field. The system is easily transportable in the field, low energy consuming, operational at low temperatures and weatherproof. Permittivity of seven tree species in both frozen and thawed states were measured showing important contrast. Hide

A fibre-optic cable was used as a temperature sensor. A 2.7-km cable was installed at a boreal forest underlain by permafrost in the interior of Alaska, whose air temperature ranges between −40 ºC in winter to 30 ºC in summer, to monitor the daily and seasonal temperature changes at surface and ground for two years. Temperature was measured at 0.5-metre intervals every 30 minutes. This instrumentation could illustrate characteristics of temperature variations, as well as snow pack dynamics. Hide

High power transmitter is becoming more and more able to meet the needs of electromagnetic exploration. However, high power transmitter needs high voltage support, which causes the risk for researchers potentially. According to the actual situation of field exploration, we designed a wireless monitoring system. The system offers two advantages, the first of which is high security, and the second advantage is simple operation. Hide

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, WiFi network could be employed in other geophysical instruments. Hide

A fast Fourier transform was applied to fit the geomagnetic diurnal variation. Fitting results showed that when the polynomial degree was greater than 160, the residual error was close to 0 nT. White noise is the main component of the residual error when the polynomial degree was greater than 160, so this method was adopted to calculate the background noise of the geomagnetic field. Spectrum analysis further demonstrated the necessity to remove background noise from geomagnetic data. Hide

We are planning a Mars mission. The mission will carry an instrument capable of measuring and mapping molecular oxygen and water in the Martian atmosphere, as well as the temperature, wind, and magnetic field. Water and oxygen are vital parts of the Martian atmospheric chemistry and must be better understood. Using computer simulation results, the paper gives a description of how the measurements will work, some problems we expect to encounter, and the sensitivity of the measurements. Hide

Meteorological observational data obtained in highly complex terrain has to be treated differently than it is usually done within state of the art quality control procedures. The main motivation and goal is to preserve as much information as possible in order to enhance the accuracy of analysis and forecast model output. It is recommended to use the method in highly complex terrain. Sufficient data density and coherent structures within data is required. Hide

- This study aimed to calibrate some of the existing models in the literature for estimating daily total global solar radiation parameter using available measuring records (maximum and minimum air temperatures) and three new models are developed based on maximum and minimum air temperatures and relative humidity.
- In this study, three new models that are based on the relative humidity and the difference between maximum and minimum air temperatures were suggested. Hide

The groundwater table is interpreted from the acquired geophysical data along the conducted profiles to be at the following elevations: Area-I: The groundwater table is located at elevations of 20 to 21 meter asl; Area-II: The groundwater table is located at elevations of 11.5 to 17.5 meters asl; Area-III: The groundwater table is located at elevations of 13 to 13.5 meters asl and Area-IV: The groundwater table is located at elevations of 14 to 58 meters asl. Hide

A new investigation technique for magnetic data by a 2D dipping dike has been presented. The main interpretive parameters are: the depth to the top, exact origin, and the width of dipping dike. The comparison of the results with drilling information reported in the literature demonstrated the prevalence of the suggested method and its potential for solving magnetic problem, for example in china field example the depth to the top of dike is 22.24 m and from drilling information range from 22–25. Hide

Radar Signal processing is one of the area where there is a lot of scope for research. This area demands efficient algorithms for study of echoes derived from various atmospheric regions. Denoising techniques were used and spectral moments were calculated. Stacked doppler profile was plotted to observe the improvement in doppler detection. It has been observed that there is a considerable improvement in recognition of the doppler echoes. Hide

CWT was applied for lithology detection over Costa Rica margin. Gamma log as best indicator was applied for the same and its spatial variation. It is observed that there four major sedimentary layer terminated with gabbroic sill. DWT applied on density log to identify the small changes in rock matrix. According the data is partitioned in to different depth for wavelet based fractal analysis. This analysis indicates that certain portion of well contains abundant shale and low energy environment. Hide

An automatic process for the estimation of forest properties in high spatial resolution using National Land Survey's airborne laser scanning data is presented. Results were evaluated by compering against national MS-NFI forest data. The estimation accuracy was generally good, but deciduous forests in leaf-off conditions caused somewhat underestimation. The method can be used to support e.g. forest managing, construction planning, wood industry and other remote sensing applications and research. Hide