Related Experiment Video
Updated: Feb 18, 2026
06:43
Effective Analysis of Human Exposure Conditions with Body-worn Dosimeters in the 2.4 GHz Band
Published on: May 2, 2018
7.5K
Repeatability analysis of airborne electromagnetic surveys
Avril Hegarty1, Gerry Stanley2, Eugene Kashdan3,4
1MACSI, University of Limerick, Limerick, Ireland.
Mathematics-In-Industry Case Studies
|November 17, 2017
Summary
Airborne electromagnetic surveys are more repeatable at lower altitudes. This finding, derived from the TELLUS project, suggests that minimizing aircraft altitude enhances data reliability for geological surveys.
Area of Science:
- Geophysics
- Geological Surveying
Background:
- Airborne electromagnetic (AEM) surveys are crucial for geological mapping.
- Understanding survey repeatability is essential for data quality assessment.
Purpose of the Study:
- To develop methods for assessing the repeatability of AEM surveys.
- To analyze AEM survey repeatability at varying altitudes and frequencies.
Main Methods:
- Utilized data from the TELLUS project (Geological Surveys of Ireland and Northern Ireland).
- Applied functional data analysis models: a Weiner process with random effects and a penalized spline smoother.
- Examined apparent resistivity repeatability across different frequencies.
Main Results:
- Both proposed statistical models indicate higher repeatability for AEM surveys conducted at lower altitudes.
- Lower flight altitudes correlate with more consistent and reliable apparent resistivity measurements.
Conclusions:
- The optimal altitude for airborne electromagnetic surveys should be minimized to maximize data repeatability.
- Findings have implications for improving the accuracy and reliability of geological surveys.
More Related Videos
Related Concept Videos
01:30Electronic Distance Measuring Instruments
563
Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over...
563
01:20Atomic Emission Spectroscopy: Overview
3.8K
Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
3.8K
01:17Common Leveling Mistakes and Errors
509
A survey team is tasked with determining the elevation difference between points Point A and Point B, separated by uneven terrain. They use a leveling instrument and a leveling rod.Common MistakesMisreading the Rod: During a backsight reading at Point A, the instrumentman observes the rod partially obscured by tall grass. Instead of reading 1.135 m, they mistakenly record 1.735 m due to the misalignment of the crosshair with the wrong graduation. This error adds 0.600 m to all subsequent...
509