25. Level 2 Tb evaluation: patch 3 H Polarisation V Polarisation
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Editor's Notes
Remember that the actual L1C 3dB footprints are ellipses within those circles.
Y13
useful for identifying the presence or absence of dew, and verifying the assumptions that i) effective temperature has not changed throughout the course of the aircraft measurements; ii) vegetation and soil temperature are in equilibrium; and iii) soil moisture has not changed significantly during ground sampling
Add a screen shot of the AACES website with web address (make sure we get password protection working before I arrive please). I would also like to include here YeNan’s KML file so that I can navigate around it to demonstrate the data we collected (roughness, veg, ASD, stations, HDAS etc), even if only for 1 or two patches completed at this stage …
Include a slide here with the campaign total rainfall. Derek Bacon was working on providing us that data so check with him where it is at now. Also include a couple of time series soil moisture plots from OzNet stations
We probably need to add a couple of schematics to illustrate what we mean here
We probably need to add a couple of schematics to illustrate what we mean here
Dry and wet example The “blotches” are not RFI, they are irrigation areas … Striping is less than 2 kelvin
So under European conditions will typically need to cover more than 40% of pixel
Add some examples of smos L1c and L2a data, plus results of our “validation” H-pol
Error due to Faraday rotation < 0.2K for any morning overpass so far. JPWigneron & YH Kerr are not concerned about angular effect within the footprint. JPWi has studied it on Portos and found it to be negligible, also for our set up Correction for atmospheric effects is set to 3.8K (flight altitude to ToA). Total of surface to ToA is ~4.8K difference between surface and aircraft ~1K. Used approach of Pellarin et al. (also included in LMEB) to calculate both (surface to ToA & aircraft to ToA) and subtracted the difference from SMOS Tb.
Use of 21km radius circles around SMOS points. Given the lack of data throughout the L2, only 2 circles in the present case could be included.
![Validation of SMOS: Some first results ,[object Object],[object Object],[object Object]](https://image.slidesharecdn.com/fr2-l10-2-100730133925-phpapp02/85/FR2-L10-2-VALIDATION-OF-SMOS-SOME-FIRST-RESULTS-1-320.jpg)
