Abstract：Using RTP A-E equation as theoretical tool,we discus in this paper the respective error laws of the three kinds of wavenumber domain RTP methods of magnetic anomaly at low latitudes.Thereafter,we give our effect evaluation,function position and definition of application condition for these RTP methods.The suppression RTP methods can only be applied to qualitative interpretation of magnetic anomaly at low latitudes.The inversion RTP method may be applied to quantitative interpretation of magnetic anomaly at low latitudes if data completely cover anomalies and the edge data condition is simple.The shift sampling methods may also be applied to quantitative interpretation of magnetic anomaly at low latitudes if data completely cover anomalies,the high precision of the edge data is more 0.2%,and the defined data size in declination is less than 64.The revelation of error law of the inversion RTP method by RTP A-E equation is an important theoretical complement which makes the inversion RTP method more rigorous and perfective.The v-axis separation method derived in this paper can be considered as an improvement of the shift sampling RTP methods.
