Method of reducing impulsive noise in electromagnetic geophysical data

Patent · Tue Jul 31 00:00:00 EDT 1990

OSTI ID:6594251

Spies, B R

This patent describes a method of reducing impulsive noise in electromagnetic geophysical data. It comprises: providing receiving antenna means for receiving an electromagnetic signal. The receiving antenna means receiving impulsive noise; providing noise sensor means for receiving the impulsive noise and placing the noise sensor means so as to receive the impulsive noise that is received by the receiving antenna means and so as to minimize the reception of the electromagnetic signal; simultaneously receiving the electromagnetic signal with the receiving antenna means so as to create a signal record and receiving the impulsive noise with the noise sensor means so as to create a noise record; examining the noise record for occurrences of the impulsive noise by comparing the noise record with a threshold noise value and identifying those instances of time in which the noise record exceeds the threshold; removing those portions of the signal record which are simultaneous with the identified instances in which the noise records exceeds the threshold, wherein the signal record has reduced impulsive noise.

• Assignee: Atlantic Richfield Co., Los Angeles, CA (USA)
• Patent Number(s): US 4945309; A
• Application Number: PPN: US s 7-393559
• OSTI ID: 6594251
• Resource Relation: Patent File Date: 14 Aug 1989
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
47 OTHER INSTRUMENTATION
ELECTROMAGNETIC SURVEYS
NOISE POLLUTION CONTROL
ANTENNAS
BACKGROUND NOISE
DATA PROCESSING
SIGNAL CONDITIONING
CONTROL
ELECTRICAL EQUIPMENT
ELECTRICAL SURVEYS
EQUIPMENT
GEOPHYSICAL SURVEYS
NOISE
POLLUTION CONTROL
PROCESSING
SURVEYS
020200* - Petroleum- Reserves
Geology
& Exploration
030200 - Natural Gas- Reserves
Geology
& Exploration
440700 - Geophysical & Meteorological Instrumentation- (1990-)