The TLs at 20km and running times by BDRM, Kraken, Krakenc and FEPE codes are listed in Table 1, where FEPE(γ/8) means that the depth step of FEPE is dz=γ/8, and range step is dr=5*dz, 1 order Pada series and Green source are used; FEPE(γ/32) means that the depth is dz=γ/32, range step is dr=2.5*dz, 3 order Pada series and Green source are used. From Fig. 8 and Table 1, it can be seen that the results calculated by FEPE(γ/32) and BDRM codes are the same, while the TL by Kraken code deviates from that by BDRM about 12.6dB, FEPE(γ/8) deviates from that by BDRM: about 5.6dB, and Krakenc deviates from BDRM about 0.7dB. The running time of FEPE(γ/32) is about 9350 times of BDRM, and the running time of Krakenc is about 20 times of BDRM.
4. NUMERICAL TESTS AND THE EXPERIMENT IN SEP. 1997
4.1 numerical tests
Before the experiment in Sep. 1997, a simulated test is done to use thermocline to inverse the tide. Fig. 9 shows the fulctuation of the wave signal calculated by BDRM and the tide.
