University of Tehran Press Journal of the Earth and Space Physics 2538-371X 32 2 2006 07 23 Comparing the application of trend analysis in three airborne Geophysics methods Comparing the application of trend analysis in three airborne Geophysics methods 23 30 80096 FA Ali Reza Heydarian Institute of Geophysics, University of Tehran, P.O. Box 14155-6466, Tehran, Iran Hojatollah Ranjbar Department of Mining Engineering Shahid Bahonar University, Kerman P.O. Box 76175-133 Journal Article 2021 03 02 Trend surface analysis is a type of multiple regression where point coordinates are independent variables and grade or thickness and… can be dependent variables. In this method, we fit a suitable surface to major values. In this paper, we applied trend surface analysis to airborne geophysical data sets including the magnetic field intensity, resistivity (frequency= 4600 Hz) and radioactivity (Potassium counting). Results show the trend of these factors and their relations. Magnetic field intensity and resistivity have a similar trend despite the trend of Potassium counting.  Finally, the ability of this method in interpreting the same data has been acknowledged. Trend surface analysis is a type of multiple regression where point coordinates are independent variables and grade or thickness and… can be dependent variables. In this method, we fit a suitable surface to major values. In this paper, we applied trend surface analysis to airborne geophysical data sets including the magnetic field intensity, resistivity (frequency= 4600 Hz) and radioactivity (Potassium counting). Results show the trend of these factors and their relations. Magnetic field intensity and resistivity have a similar trend despite the trend of Potassium counting.  Finally, the ability of this method in interpreting the same data has been acknowledged. https://jesphys.ut.ac.ir/article_80096_a7f3135878b7b01a6577ea9229368d3d.pdf