A method for monitoring the health of one or more rotor blades, comprising: determining, by a processing subsystem, a delta TOA corresponding to each of the one or more blades based upon a respective actual time of arrival at a position of the one or more blades; determining, by the processing subsystem, one or more coefficients based upon one or more operational data; determining (314,316,318) effects of the one or more operational data on the respective actual TOA by utilizing the one or more coefficients and the one or more operational data; determining, by the processing subsystem, a normalized delta TOA corresponding to each of the one or more blades by subtracting the effects of the one or more operational data from the delta TOA; and determining, by the processing subsystem, a corrected delta TOA corresponding to each of the one or more blades by removing effects of reseating of the one or more blades from the normalized delta TOA; characterised in that determining the corrected delta TOA comprises: determining a reseating offset corresponding to each of the one or more blades when the one or more blades are operating for the first time after a start up; and subtracting the reseating offset from the normalized delta TOA resulting in the corrected delta TOA; wherein determining the reseating offset comprises: retrieving one or more normalized delta TOA corresponding to each of the one or more blades; determining one or more corrected delta TOA utilizing the one or more normalized delta TOA; determining a first mean of the one or more normalized delta TOA; determining a second mean of the one or more corrected delta TOA; and subtracting the second mean from the first mean resulting in the reseating offset. determining, by a processing subsystem, a delta TOA corresponding to each of the one or more blades based upon a respective actual time of arrival at a position of the one or more blades; determining, by the processing subsystem, one or more coefficients based upon one or more operational data; determining (314,316,318) effects of the one or more operational data on the respective actual TOA by utilizing the one or more coefficients and the one or more operational data; determining, by the processing subsystem, a normalized delta TOA corresponding to each of the one or more blades by subtracting the effects of the one or more operational data from the delta TOA; and determining, by the processing subsystem, a corrected delta TOA corresponding to each of the one or more blades by removing effects of reseating of the one or more blades from the normalized delta TOA; characterised in that determining the corrected delta TOA comprises: determining a reseating offset corresponding to each of the one or more blades when the one or more blades are operating for the first time after a start up; and subtracting the reseating offset from the normalized delta TOA resulting in the corrected delta TOA; wherein determining the reseating offset comprises: retrieving one or more normalized delta TOA corresponding to each of the one or more blades; determining one or more corrected delta TOA utilizing the one or more normalized delta TOA; determining a first mean of the one or more normalized delta TOA; determining a second mean of the one or more corrected delta TOA; and subtracting the second mean from the first mean resulting in the reseating offset.