Method and system for enhancing the accuracy of measurements of a physical quantity

A method for enhancing the accuracy of depth measurements of a portion of an ocean floor comprising the steps of:

• determining a trend for a plurality of depth measurements;
• determining, for each of the plurality of depth measurements, an associated residual between the trend and the measurement;
• determining when the magnitude of the residual exceeds a particular value;
• determining, for each of the residuals that exceeds the particular value, an interpolated value for the residual;
• comparing, for each of the residuals that exceeds the particular value, the residual to the interpolated value of the residual to identify an anomalous associated depth measurement;
• in response to identification of an anomalous associated depth measurement, discarding the anomalous depth measurement;
• and
• generating an output of all depth measurement of the physical quantity not discarded as anomalous.

A system for outputting anomalous measurements of an object of interest, comprising:

• a storage medium;
• a processor coupled to the storage medium;
• a computer program stored in the storage medium, the computer program executed on the processor to:
• determine a trend for a plurality of measurements;
• determine, for each of at least one of the plurality of measurements, an associated residual between the trend and the measurement;
• determine, for each of at least one of the associated residuals, an interpolated value for the residual;
• compare, for each of the at least one associated residuals, the error value to the residual to determine whether a measurement associated with the residual is anomalous;
• in response to an identification of an anomalous measurement, discarding anomalous measurements;
• and
• output means for generating all measurements of the object of interest not discarded as anomalous.