Brightness temperature time series can be created interactively through the Live Access Server (LAS)

Category : Cal/Val, Data, L1

The Team in Hamburg (Institut für Meereskunde at KlimaCampus / Universität Hamburg) is working on thin sea ice detection and monitoring (see our previous blog posts on the subject). Dr. Lars Kaleschke and his team has now produced a Live access Server enabling to create interactively time series as shown on the examples below. Also check: http://icdc.zmaw.de/l3b_smos_tb.html?&L=1 and http://www.arctic.io/2013/2/smos-brightness-temperature

SMOS_TB_v505_I_north_20121201_01

Figure 1: Mean daily brightness temperature (TB) intensity in the Northern hemisphere over open water, sea ice, and some of the adjacent land masses for December 1, 2012.

SMOS_TB_v505_I_uncertainty_north_20121201_01

Figure 2: Corresponding standard deviation (uncertainty) calculated as the variation of TB data pairs of the respective grid cell.

TB_timeseries
Figure 3: Example brightness temperature time series of the sea ice north of Greenland as generated with the Integrated Climate Data Center (ICDC) Live Access Server (LAS).

Link to ICDC: http://icdc.zmaw.de/

Update on SMOS products specification and tools

Category : Cal/Val, Data, L1, L2

From Catherine Bouzinac … FYI

Dear SMOS cal/val PI,

here is some updated information on the SMOS data products and tools (this
time with the correct FTP server at ESAC).

Last version of the L1 product specifications:
SMOS Level 1 and Auxiliary Data Products Specifications
SO-TN-IDR-GS-0005-L1-Spec-v5.13.pdf

The most recent versions of all the specs are available from:
ftp://193.146.123.166/smos/Operational_Documentation/DPGS/Technical_Notes/
<= except for the NRT
ftp://193.146.123.166/smos/Operational_Documentation/NRTP/ <= NRT

This is a public location so everyone can download the documents.

The most recent versions are (April 2010):
L0: SO-TN-IDR-GS-0003 L0 Spec v3.5 2010-02-02.pdf
L1: SO-TN-IDR-GS-0005 L1 Spec v5.14 2010-02-10_track_changes.pdf
L2: SO-TN-IDR-GS-0006 L2 Spec v4.9 2010-04-06.pdf
NRT: SO-ID-DMS-GS-0002 – NRT Product Format v2_6.pdf  <= FTP has 2.4

The tools developed under the DPGS contracts (the Array Matlab API is not
there yet) are under: ftp://193.146.123.166/smos/software/ along with the associated documents.

Enjoy!

Yann

Want to look at SMOS DATA? what tools and which formats?

Category : Cal/Val, Data, L1, L2

To answer frequently asked questions, here is a short memo on data formats and specifications document availability established thanks to Norrie Wright

the basic point to access all this is the ESAC DPGS node where you will find

the Standard data specifications –> ftp://131.176.251.166/smos/Operational_Documentation/Technical_Notes/

Note that the most up to date documents are (as of 20/4/2010)
for level 0 –> SO-TN-IDR-GS-0003 L0 Spec v3.5 2010-02-02.pdf

for level 1 –> SO-TN-IDR-GS-0005 L1 Spec v5.14 2010-02-10_track_changes.pdf
For Level 2 –>SO-TN-IDR-GS-0006 L2 Spec v4.9 2010-04-06.pdf
and for near real time –> SO-ID-DMS-GS-0002 – NRT Product Format v2_6.pdf

If you want to look at the data ESA had a number of tools developped they are located – with related documentation at –>  ftp://131.176.251.166/smos/software/

You may also want to use the BEAM SMOS Tool box available from Brockman Consult (http://www.brockmann-consult.de/beam-wiki/display/SBOX/SMOS+Toolbox+for+BEAM) or ESA ESRIN, not to mention the now famous Orbit tool ESOV -NG (the SMOS orbit file was given in this blog earlier) also available from ESA

Michele Zundo also indicates that if you want to really go into the data and make your own algorithms there is a C++ library to allow read/write fields from the SMOS products available on ftp://131.176.251.166/smos/software/XML_RW_API
It needs to be used together with Products schemas also located at ftp://131.176.251.166/smos/schemas

Finally a « matlab » read tool was developed by Array Systems and can be obtained from  Ali Mahmoodi at Array –> ali@array.ca it simplifies readuing data to use in Matlab code

Enjoy!

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