The estimated phenological stages and the statistical data are compared in Fig. 3 and Fig. 4. Table 2indicated the number of cases that the estimated dates were within the period from beginning to end of each phenological season in statistical data. Fig. 4 shows the differences between the estimated phenological date and peak of phenological season in statistical data. The error of estimated planting date with the wavelet transform was smaller than that with the Fourier transform by 5.1 days in RMSE (Table. 1). The number of cases in which the estimation error exceeded ± 16 days when using the wavelet transform were: 3 (10%) in planting date, 2 (7%) in heading date, 1 (3%) in harvesting date and 6 (20%) in growing period. On the other hand, when using the Fourier transform, those were: 11 (37%) in planting date, 2 (7%) in heading date, 4 (13%) in harvesting date and 8 (27%) in growing period. Except for heading date, these numbers when using the wavelet transform were smaller than that using the Fourier transform.