SMOS Uni Bonn contributions to SMOS Validation Ralf
![SMOS Uni Bonn contributions to SMOS Validation Ralf Lindau Bonn University SMOS Workshop – SMOS Uni Bonn contributions to SMOS Validation Ralf Lindau Bonn University SMOS Workshop –](https://slidetodoc.com/presentation_image_h2/d447dbc3f0b9ff5bda6eaf9f2990da00/image-1.jpg)
SMOS Uni Bonn contributions to SMOS Validation Ralf Lindau Bonn University SMOS Workshop – Hamburg, 9. -10. November 2006
![SMOS Bonn contributions § Detection of Radio Frequency Interference - Found in SMMR, AMSR SMOS Bonn contributions § Detection of Radio Frequency Interference - Found in SMMR, AMSR](http://slidetodoc.com/presentation_image_h2/d447dbc3f0b9ff5bda6eaf9f2990da00/image-2.jpg)
SMOS Bonn contributions § Detection of Radio Frequency Interference - Found in SMMR, AMSR etc. - Expected also in SMOS § Comparison of SMOS soil moisture with existing data - Direct measurements from GSMDB - AMSR-derived SM § Pixel-intern variance - Necessary to interprete the intended validations with point measurements properly. - build and operate a transportable polarized L-Band radiometer § Investigate signal noise due to rain and vegetation SMOS Workshop – Hamburg, 9. -10. November 2006
![SMOS Radio Frequency Interference q Time series of 6 GHz brightness temperature from SMMR SMOS Radio Frequency Interference q Time series of 6 GHz brightness temperature from SMMR](http://slidetodoc.com/presentation_image_h2/d447dbc3f0b9ff5bda6eaf9f2990da00/image-3.jpg)
SMOS Radio Frequency Interference q Time series of 6 GHz brightness temperature from SMMR in France q Until 1981 the normal annual cycle is found. q After 1981 the 6 Ghz signal is completely unusable due to noise. SMOS Workshop – Hamburg, 9. -10. November 2006
![SMOS SMMR RFI in 6 GHz The scatter is low in Sibiria, increases westward SMOS SMMR RFI in 6 GHz The scatter is low in Sibiria, increases westward](http://slidetodoc.com/presentation_image_h2/d447dbc3f0b9ff5bda6eaf9f2990da00/image-4.jpg)
SMOS SMMR RFI in 6 GHz The scatter is low in Sibiria, increases westward and reaches maximum values near St. Petersburg SMOS Workshop – Hamburg, 9. -10. November 2006
![SMOS ASMR RFI In Europe the 10 GHz channel is completely noisy in England SMOS ASMR RFI In Europe the 10 GHz channel is completely noisy in England](http://slidetodoc.com/presentation_image_h2/d447dbc3f0b9ff5bda6eaf9f2990da00/image-5.jpg)
SMOS ASMR RFI In Europe the 10 GHz channel is completely noisy in England Italy. In the USA the 6 GHz measurements are corrupted over New York, Boulder etc. SMOS Workshop – Hamburg, 9. -10. November 2006
![SMOS AMSR 10 GHz RFI 250 K 300 K • RFI is detectable by SMOS AMSR 10 GHz RFI 250 K 300 K • RFI is detectable by](http://slidetodoc.com/presentation_image_h2/d447dbc3f0b9ff5bda6eaf9f2990da00/image-6.jpg)
SMOS AMSR 10 GHz RFI 250 K 300 K • RFI is detectable by • high monthly averages • high monthly stddev. SMOS Workshop – Hamburg, 9. -10. November 2006
![SMOS Simple RFI Scheme • TB > 260 K • Stddev > • 5 SMOS Simple RFI Scheme • TB > 260 K • Stddev > • 5](http://slidetodoc.com/presentation_image_h2/d447dbc3f0b9ff5bda6eaf9f2990da00/image-7.jpg)
SMOS Simple RFI Scheme • TB > 260 K • Stddev > • 5 K DTB > 20 K compared to a 10° x 30° surrounding SMOS Workshop – Hamburg, 9. -10. November 2006
![SMOS Soil Moisture from AMSR Longtime mean + 10 -day anomalies SMOS Workshop – SMOS Soil Moisture from AMSR Longtime mean + 10 -day anomalies SMOS Workshop –](http://slidetodoc.com/presentation_image_h2/d447dbc3f0b9ff5bda6eaf9f2990da00/image-8.jpg)
SMOS Soil Moisture from AMSR Longtime mean + 10 -day anomalies SMOS Workshop – Hamburg, 9. -10. November 2006
![SMOS 2 -Step Retrieval SMOS Workshop – Hamburg, 9. -10. November 2006 SMOS 2 -Step Retrieval SMOS Workshop – Hamburg, 9. -10. November 2006](http://slidetodoc.com/presentation_image_h2/d447dbc3f0b9ff5bda6eaf9f2990da00/image-9.jpg)
SMOS 2 -Step Retrieval SMOS Workshop – Hamburg, 9. -10. November 2006
![SMOS Pixel-intern Variance Belarussian soil moisture data 21 stations, 10 daily during about 10 SMOS Pixel-intern Variance Belarussian soil moisture data 21 stations, 10 daily during about 10](http://slidetodoc.com/presentation_image_h2/d447dbc3f0b9ff5bda6eaf9f2990da00/image-10.jpg)
SMOS Pixel-intern Variance Belarussian soil moisture data 21 stations, 10 daily during about 10 years Average spatially and compare the reduced variance to the total variance 40% are left for 400 -km-Pixels 59% are left for SMMR-Pixels The left external variance is equal to the maximum correlation between point measurements and area averages SMOS Workshop – Hamburg, 9. -10. November 2006
- Slides: 10