2.2.2. Satellite Data

To monitor the growth stages of major crop types cultivated from spring to autumn in the study area, we examined Sentinel-1 and Sentinel-2 data acquired in the time period from late March to early October. After discarding Sentinel-2 acquisitions with too much cloud cover (more than 20%), there were in total eight Sentinel-2 acquisitions left. The available number of the Sentinel-1 and Sentinel-2 acquisitions for each month is summarized in Table 4.



The employed Sentinel-1 data is the level-1 interferometric wide swath (IW) single look complex (SLC) data. In total, 18 acquisitions were used (Table 5).

**Table 5.** Metadata of the data stack of Sentinel-1 (S1) interferometric wide swath (IW) single look complex (SLC) data using the parameters from the first image. These values remain very close for all subsequent acquisitions.


The Sentinel-2 data used in this study is the MSI Level-1C data (Table 6). In total, eight acquisitions were used, spanning the time from 9 May 2018 to 11 October 2018.

**Table 6.** Central wavelength and bandwidth of different spectral bands of Sentinel-2 data used in this research.

