Downscaling algorithm using active-passive microwave observations with variable incident angle

Evaluation of the SMAP brightness temperature downscaling algorithm using active–passive microwave observations

Passive microwave soil moisture downscaling using evaporative fraction

This paper develops two different approaches for downscaling (disaggregation) passive microwave derived soil moisture from coarse resolution L-band observations. Ground and airborne data collected over Walnut Gulch experimental watershed during the Monsoon ’90 experiment were used to test these approaches. These data consisted of eight micrometeorological stations (METFLUX) and six flights of t...

Investigating the Influence of Variable Freshwater Ice Types on Passive and Active Microwave Observations

Dual-polarized airborne passive microwave (PM) brightness temperatures (Tb) at 6.9 GHz H/V, 19 GHz H/V and 37 GHz H/V and spaceborne active microwave (AM) X-band (9.65 GHz VV, VH) backscatter (σ0) are observed coincident to in situ snow and lake-ice measurements collected over two lakes near Inuvik, Canada. Lake-ice thickness is found to be positively correlated with 19 GHz V emission (R = 0.67...

Soil moisture inversion from aircraft passive microwave observations during SMEX04 using a single-frequency algorithm

Soil moisture plays a key role in global water cycles. In the study, soil moisture retrievals from airborne microwave radiometer observations using a single-frequency algorithm were presented. The algorithm is based on a simplified radiative transfer (tauomega) model and the influence of both the roughness and vegetation is combined into a single parameter in the algorithm. The microwave polari...

Fusion of Active and Passive Microwave Observations to Create an Essential Climate Variable Data Record on Soil Moisture

Soil moisture was recently included in the list of Essential Climate Variables (ECVs) that are deemed essential for IPCC (Intergovernmental Panel on Climate Change) and UNFCCC (United Nations Framework Convention on Climate Change) needs and considered feasible for global observation. ECVs data records should be as long, complete and consistent as possible, and in the case of soil moisture this...