@misc{schulzstellenfleth_using_ers2_2000, 
author={Schulz-Stellenfleth, J., Lehner, S., Horstmann, J.},
title={Using ERS-2 Wave Mode Cross Spectra to simulate ENVISAT ASAR Ocean Wave Retrieval},
year={2000},
howpublished = {conference paper: Honolulu, HI (USA);},
doi = {https://doi.org/10.1109/IGARSS.2000.860489},
abstract = {A global dataset of complex synthetic aperture radar (SAR) images processed from wave mode raw data acquired by the European remote sensing satellite ERS-2 is used to measure ocean waves. Cross spectra of two looks extracted from the azimuth spectrum of wave mode imagettes are used to derive ocean wave propagation directions on a global basis. Energy and propagation direction derived from wave mode cross spectra are compared with ocean wave model data from the European center for medium range weather forecasts (ECMWF). A new inversion scheme for the retrieval of two dimensional wave spectra from SAR cross spectra is presented. The algorithm is based on a maximum a posteriori estimation which combines the information from SAR measurements with a priori knowledge on short ocean waves. A new regularization approach is used to impose smoothness constraints on the retrieved wave spectra.},
note = {Online available at: \url{https://doi.org/10.1109/IGARSS.2000.860489} (DOI). Schulz-Stellenfleth, J.; Lehner, S.; Horstmann, J.: Using ERS-2 Wave Mode Cross Spectra to simulate ENVISAT ASAR Ocean Wave Retrieval. In: IGARSS 2000, International Geoscience and Remote Sensing Symposium. Honolulu, HI (USA). IEEE. 2000. 272-274. DOI: 10.1109/IGARSS.2000.860489}}