Patent ID: 7365544

Claim:
A method of making airborne geophysical measurements, comprising: taking first measurements as a function of time, from one or more geophysical instruments associated with or carried by at least one aircraft, to produce geophysical data related to the ground below respective geophysical instrument; taking second measurements as a function of time from navigation and mapping instruments associated with or carried by the at least one aircraft; computing a background response of each geophysical instrument as a function of time using the second measurements to take account of its time varying altitude, and a time varying topography of the ground below respective geophysical instrument; adjusting data processing conditions applied to the geophysical data from each geophysical instrument using the background response and an attitude of the respective geophysical instrument to enhance the performance of respective geophysical instrument; and, adjusting the geophysical data from each geophysical instrument using the background response of the respective geophysical instrument to yield a geophysical data output for respective geophysical instrument having reduced effects resulting from variations in altitude, attitude and topography.