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Fig. 9. Definition of data block (trailing blocks after header block).

Figure 9 Definition of data block (trailing blocks after header block).

Related Figures (19)

Fig. 1. Functional block diagram of a single slave unit.
Fig. 1. Functional block diagram of a single slave unit.
Fig. 3. Functional block diagram of the master unit.
Fig. 3. Functional block diagram of the master unit.
Fig. 4. Prototype circuit boards: master (left, 15 cm x 9.5 cm) and slave units (right, 15cm x 9.5cm).
Fig. 4. Prototype circuit boards: master (left, 15 cm x 9.5 cm) and slave units (right, 15cm x 9.5cm).
Fig. 6. Coordinating clock for sampling and storing commands for two slave units operating in alternating mode. Fig. 5. Coordinating clock for sampling and storing commands.
Fig. 6. Coordinating clock for sampling and storing commands for two slave units operating in alternating mode. Fig. 5. Coordinating clock for sampling and storing commands.
Fig. 8. Definition of the header block (the first 512 bytes) of the SD card raw data.
Fig. 8. Definition of the header block (the first 512 bytes) of the SD card raw data.
Two Slave Units with Dual Buffers (Interlacing mode) Fig. 7. Coordinating clock for sampling and storing commands for two slave units operating in interlacing mode.
Two Slave Units with Dual Buffers (Interlacing mode) Fig. 7. Coordinating clock for sampling and storing commands for two slave units operating in interlacing mode.
Fig. 11. Spectrum of the merged data shown in Fig. 10. Note that there is a spectral component at frequency near 50 kHz. Fig. 10. Reconstructing a sine wave recorded in interlacing mode (partially shown). Note that there is a high frequency, small amplitude jittering on the sine wave.
Fig. 11. Spectrum of the merged data shown in Fig. 10. Note that there is a spectral component at frequency near 50 kHz. Fig. 10. Reconstructing a sine wave recorded in interlacing mode (partially shown). Note that there is a high frequency, small amplitude jittering on the sine wave.
Fig. 13. Linear regression of the difference between two AD channels fo! calibration.
Fig. 13. Linear regression of the difference between two AD channels fo! calibration.
Fig. 12. Voltage level reading comparison between two AD channels.
Fig. 12. Voltage level reading comparison between two AD channels.
Fig. 14. Reconstructing the sine wave shown in Fig. 10 (post-calibration).
Fig. 14. Reconstructing the sine wave shown in Fig. 10 (post-calibration).
Fig. 15. Spectrum of the merged data in Fig. 14. Note that abnormal spectral component at frequency near 50 kHz has vanished.
Fig. 15. Spectrum of the merged data in Fig. 14. Note that abnormal spectral component at frequency near 50 kHz has vanished.
Possible configurations with one master unit/two slave unit system. The sampling frequency specified in the table is the upper limit of the performance. 38.428 cm, a difference of less than 0.45cm, very close to the distance obtained with a tape measure, 38.0cm. This result confirms the efficacy of the synchronization.
Possible configurations with one master unit/two slave unit system. The sampling frequency specified in the table is the upper limit of the performance. 38.428 cm, a difference of less than 0.45cm, very close to the distance obtained with a tape measure, 38.0cm. This result confirms the efficacy of the synchronization.
Fig. 17. Schematic of the instrument frame used for the reflection experiment. Fig. 16. Prototype of dual-channel hydrophone recorder.
Fig. 17. Schematic of the instrument frame used for the reflection experiment. Fig. 16. Prototype of dual-channel hydrophone recorder.
Fig. 18. Comparison of arrival times for dual-channel recorder used in field reflection coefficient experiment.
Fig. 18. Comparison of arrival times for dual-channel recorder used in field reflection coefficient experiment.
Comparison of features across different recording systems. Notes: C = continuous, D = duty cycle, E = event driven. Table 2
Comparison of features across different recording systems. Notes: C = continuous, D = duty cycle, E = event driven. Table 2
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