scholarly journals 2D stabilised analytic signal method in DC pole-pole potential data interpretation

2003 ◽  
Vol 112 (1) ◽  
pp. 37-49 ◽  
Author(s):  
Paras R. Pujari ◽  
Rambhatla G. Sastry
Keyword(s):  
Data Interpretation ◽  
Analytic Signal ◽  
Signal Method

scholarly journals Enhancing the quality of interpretation magnetic data at low latitudes

2017 ◽  
Vol 1 (T4) ◽  
pp. 105-114
Author(s):  
Hai Hong Nguyen ◽  
Nhan Thanh Nhan ◽  
Liet Van Dang ◽  
Thu Ngoc Nguyen
Keyword(s):  
Magnetic Anomaly ◽  
Hilbert Transform ◽  
Amplitude Spectrum ◽  
Data Interpretation ◽  
Analytic Signal ◽  
Magnetic Data ◽  
Low Latitudes ◽  
Reduction To The Pole ◽  
Signal Method

Magnetic anomalies are antisymmetrical and often skewed to the location of the sources, because both of the magnetization and ambient field are not directed vertically, so it’s difficult to interpret. For reducing the magnetic anomaly to a symmetrical one – this located on the source of the anomaly – people often use the reduction to the pole (RTP) where the magnetization and ambient field are both directed vertically. However, at low latitudes (an absolute inclination less than 16o30’), the amplitude spectrum of the RTP’s operator was amplified at higher frequencies (short wavelengths) can form a narrow pie-shaped; so it produces artifacts elongated along the direction of the magnetic declination. Therefore, many methods of RTP at low latitudes are given to solve this problem, but most of them are not efficiency. In this paper, we performed enhancing the quality of interpretation of magnetic data at low latitudes by some RTP methods for magnetic data at low latitudes and the analytic signal method using gradient operator and Hilbert transform. This method is applied to a model and to a real magnetic anomaly to find out the best method. Then this method was applied to enhance the quality of magnetic data interpretation in the Southern Vietnam. The result showed that the analytic signal method using Hilbert transform allowed enhancing the quality of interpretatio of magnetic data n at low latitudes is the best.

scholarly journals Analytic Signal and Euler Depth Interpretation of Magnetic Anomalies: Applicability to the Beatrice Greenstone Belt

2015 ◽  
Vol 7 (4) ◽  
pp. 108
Author(s):  
Thabisani Ndlovu. ◽  
Mashingaidze R. T. ◽  
Mpofu P.
Keyword(s):  
Regional Scale ◽  
Data Interpretation ◽  
Analytic Signal ◽  
Magnetic Data ◽  
Body Location ◽  
Geological Map ◽  
Ground Magnetic ◽  
Depth Relationship ◽  
Two Parameters ◽  
Good Agreement

We apply the Analytic Signal and Euler depth filtering techniques on magnetic data to identify a magnetic causative body location-depth relationship, two parameters of importance in both geophysical exploration and ore body modelling. We identify a dipping magnetic contact from the interpreted Euler depth anomalies, showing a good agreement with both the Total Field Magnetic (TFM) map and the Analytic Signal (AS) map. The Euler depth anomalies correlate well with the locations and edges of shallow causative bodies. The deeper Euler interpreted sources explain the magnetic high on the regional aeromagnetic map which is coincident with neither geological contacts nor the more recent dolerite intrusions. This suggests that the magnetic highs on the regional aeromagnetic map are due to deep seated sources, otherwise invisible on the regional geological map. The results show the usefulness and relevancy of these two filters not only in interpreting routine TFM data from the study area, but up to a regional scale. While the aeromagnetic data shows that the magnetisation pattern is predominantly divorced from the geological map, the ground magnetic data interpretation points to a more recent magnetisation of the belt, enabling conclusions to be drawn about the geological history and structural geology otherwise not evident on the geological map.

scholarly journals Spoken digit recognition by analytic signal method

1988 ◽  
Vol 2 (2) ◽  
pp. 75-79
Author(s):  
Masashi KAWASUMI ◽  
Satoshi SEKINE ◽  
Jun-ichi KOSHI ◽  
Keiji HIRAMATSU
Keyword(s):  
Analytic Signal ◽  
Digit Recognition ◽  
Signal Method

scholarly journals Instantaneous frequencies of signals obtained by the analytic signal method

2006 ◽  
Vol 27 (3) ◽  
pp. 163-170 ◽  
Author(s):  
Hideo Suzuki ◽  
Furong Ma ◽  
Hideaki Izumi ◽  
Osamu Yamazaki ◽  
Shigeki Okawa ◽  
...  
Keyword(s):  
Analytic Signal ◽  
Instantaneous Frequencies ◽  
Signal Method
Sign in / Sign up

Export Citation Format

Share Document