where 𝜎0𝑠𝑎𝑡σsat0 is the backscattering coefficient of the area under investigation in the respective acquisition, and 𝑁𝐸𝑆𝑍𝑠𝑎𝑡NESZsat is a range-dependent noise parameter that can be calculated using look-up tables provided in the Sentinel-1 metadata. The parameters ...
where 𝜎0𝑠𝑎𝑡σsat0 is the backscattering coefficient of the area under investigation in the respective acquisition, and 𝑁𝐸𝑆𝑍𝑠𝑎𝑡NESZsat is a range-dependent noise parameter that can be calculated using look-up tables provided in the Sentinel-1 metadata. The parameters ...
This is caused by different noise-equivalent sigma zero (NESZ) in different sub-swaths in interferometric-wide (IW) and extra-wide (EW) modes. Deep learning (DL) models, due to their great generalization ability, are widely used in retrieval tasks in a data-driven way. In recent years, ...
Known that the radar backscattering can reflect the ocean clutter more accurately when exceeding NESZ, from Figure 1 and Figure 7, it can be seen that the NRCS 𝜎0VHσVH0 exceeds NESZ when the wind speed is roughly in the interval of about 8–10 m/sm/s. Moreover, under every bin ...
Due to different noise-equivalent sigma zero (NESZ), the discontinuity of the wind retrieval at the edge of sub-swaths is the main issue and this problem is quite serious for cross-polarized SAR with weak sea-surface backscattering roughness. Recently, a few studies were conducted for TC wind...
Mapping of fast ice displacement and investigating sea ice rheological behavior is a major open topic in coastal ice engineering and sea ice modeling. This study presents first results on Sentinel-1 repeat-pass space borne synthetic aperture radar interf
Considering the reference slick-free sea surface ROIs (dashed blue boxes), the average SNR is always larger than about 7 dB, witnessing that the signal scattered off slick-free sea surface lies well above the NESZ along the whole SAR dataset. Considering the low-backscattering sea areas, i.e...