ASCAT2SMAP-RDCA: L-band-like Soil Moisture and Vegetation Optical Depth Retrieved From C-band Soil Moisture data

This data contains L-band-like Soil Moisture (SM) and Vegetation Optical Depth (VOD) retrieved from Advanced SCATterometer (ASCAT). To retrive L-band-like VOD and SM, (1) ASCAT SM have converted to SMAP SCA-V and SCA-H using image-to-image translation algorithm (called ASCAT2SMAP; please refer to Lee et al., 2024) (2) Forward simulation of V- and H-polarized brightness temperature have conducted based on SMAP SCA-V and SCA-H parameters (Chan et al., 2016). (3) SM and VOD are retrieved using Regularized Dual Channel Algorithm (Chaubell et al. 2021). When retrieved L-band like VOD and SM from ASCAT are compared to the original data (and to in situ measurement for SM), it showed good ability to track SM and ability to track seasonal cycle or interannual variability of VOD. Corresponding manuscript is under perparation. References Lee, J., Jung, S., & Im, J. (2024). ASCAT2SMAP: image-to-image translation to obtain L-band-like soil moisture from C-band satellite data. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing. Chan, S. K., Bindlish, R., O'Neill, P. E., Njoku, E., Jackson, T., Colliander, A., ... & Kerr, Y. (2016). Assessment of the SMAP passive soil moisture product. IEEE Transactions on Geoscience and Remote Sensing, 54(8), 4994-5007. Chaubell, J., Yueh, S., Dunbar, R. S., Colliander, A., Entekhabi, D., Chan, S. K., ... & Walker, J. P. (2021). Regularized dual-channel algorithm for the retrieval of soil moisture and vegetation optical depth from SMAP measurements. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 15, 102-114.