NASA smap Project

This data set contains data obtained by the Passive Active L- and S-band (PALS) microwave aircraft instrument that are matched up with a variety of soil moisture campaign data. The data were collected as part of four different campaigns: Southern Great Plains 1999 (SGP99), Cloud and Land Surface Interaction Campaign 2007 (CLASIC07), Soil Moisture Experiment 2002 (SMEX02), and the SMAP Validation Experiment 2008 (SMAPVEX08)....本数据集包含由被动主动L波段与S波段（Passive Active L- and S-band, PALS）机载微波仪器获取的数据，此类数据已与多套土壤水分野外试验数据完成匹配。该数据采集自四项独立野外试验：1999年南大平原试验（SGP99）、2007年云与陆面相互作用试验（CLASIC07）、2002年土壤水分试验（SMEX02）以及2008年SMAP验证试验（SMAPVEX08）……