A method comprising: receiving, by a sensor node comprising a sensor to measure survey data of a target structure , a wireless synchronization signal ; and synchronizing, by the sensor node , an operation of the sensor node based on the wireless synchronization signal ; wherein the synchronizing comprises: determining, based on the wireless synchronization signal , an amount of drift of the frequency of a clock of the sensor node with respect to a target frequency of a master clock; intermittently re-sampling, using interpolation, the measured survey data based on the determined amount of drift, said re-sampling including: up-sampling the measured survey data to a fixed sampling rate determined from the wireless synchronization signal to increase an effective sample rate of the measured survey data, the fixed sampling rate being relative to a clock running at the target frequency of the master clock; and decimating the measured survey data to the fixed sampling rate as determined from the wireless synchronization signal : characterized in that the time period between successive re-samplings of the survey data is based on a nominal value of drift and an allowed level of noise at an output of the sensor node . receiving, by a sensor node comprising a sensor to measure survey data of a target structure , a wireless synchronization signal ; and synchronizing, by the sensor node , an operation of the sensor node based on the wireless synchronization signal ; wherein the synchronizing comprises: determining, based on the wireless synchronization signal , an amount of drift of the frequency of a clock of the sensor node with respect to a target frequency of a master clock; intermittently re-sampling, using interpolation, the measured survey data based on the determined amount of drift, said re-sampling including: up-sampling the measured survey data to a fixed sampling rate determined from the wireless synchronization signal to increase an effective sample rate of the measured survey data, the fixed sampling rate being relative to a clock running at the target frequency of the master clock; and decimating the measured survey data to the fixed sampling rate as determined from the wireless synchronization signal : characterized in that the time period between successive re-samplings of the survey data is based on a nominal value of drift and an allowed level of noise at an output of the sensor node . determining, based on the wireless synchronization signal , an amount of drift of the frequency of a clock of the sensor node with respect to a target frequency of a master clock; intermittently re-sampling, using interpolation, the measured survey data based on the determined amount of drift, said re-sampling including: up-sampling the measured survey data to a fixed sampling rate determined from the wireless synchronization signal to increase an effective sample rate of the measured survey data, the fixed sampling rate being relative to a clock running at the target frequency of the master clock; and decimating the measured survey data to the fixed sampling rate as determined from the wireless synchronization signal : characterized in that the time period between successive re-samplings of the survey data is based on a nominal value of drift and an allowed level of noise at an output of the sensor node . up-sampling the measured survey data to a fixed sampling rate determined from the wireless synchronization signal to increase an effective sample rate of the measured survey data, the fixed sampling rate being relative to a clock running at the target frequency of the master clock; and decimating the measured survey data to the fixed sampling rate as determined from the wireless synchronization signal : characterized in that the time period between successive re-samplings of the survey data is based on a nominal value of drift and an allowed level of noise at an output of the sensor node . <EOS>