Submitted to: International Geoscience and Remote Sensing Symposium Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 7/5/2008
Publication Date: 12/22/2008
Citation: Yueh, S., Dinardo, S., Chan, S., Njoku, E., Jackson, T.J., Bindlish, R. 2008. Passive and active L-band system and observations during the 2007 CLASIC. In: Proceedings International Geoscience and Remote Sensing Symposium, July 7-11, 2008, Boston, Massachusetts. p. II241-II244. Interpretive Summary:
Technical Abstract: This article describes the upgraded PALS instrument and the characteristics of data acquired from the Cloud Land Atmospheric Interaction Campaign (CLASIC) 2007. The data acquired over lake passes were used to remove the radiometer calibration bias. The calibrated radiometer data showed significant consistency with the L-band land emission model for soil surfaces published in the literature. We observed significant temporal (days) changes of a few dB in the radar data. The change of radar backscatter appeared to correlate well with the change of in-situ soil moisture or the soil moisture data derived from the PALS dual-polarized brightness temperatures. The radar vegetation index also correlated well with the vegetation opacity estimated from the radiometer data. The preliminary analyses suggest complementary information contained in the surface emissivity and backscatter signatures for the retrieval of soil moisture and vegetation water content.