Ver. 005005-06-0032 Release Notes
Notes(April 19, 2010)
1.

Descriptions

The version 0032 is a second test retrieval version to verify L1B and L2 dataprocessing.

We strongly request no scientific usage of version 0032 at present stage.

The period of coverage of this version is from October 12, 2009 to March 17, 2010.
From November 30 to December 15, 2009, the ISS Solar Paddle stopped just in
front of the SMILES IFOV due to the maintenance reason of the Port Solar
Power Module elements of the ISS.

From February 25 to March 5, 2010, the number of L1B data is only around
10% of ordinary condition, due to trouble of communication system of ISS/JEM(not according to SMILES itself).



There are two types of products. The one is consisted of minimum information(L2Product_G_RA, 0.8 MB/file), which is identical with the product of previousversion. In addition of it, the other has detailed information, such as the status flagfrom L1B and averaging kernels (L2Product, 8MB/file). Refer to the Product Guidefor details.

The pointing direction for determining tangent altitudes (geometrical) is calculated
by using SMILES scan mirror angle and ISS position. However, since the pointing
accuracy heavily would affect to error of tangent altitude determination, an average
altitude within single scan is retrieved with using the Star Sensor of SMILES in L2
processing. In case that sunlight or moonbeam enters in the FOV of SMILES StarSensor, positioning information cannot be obtained, so it will be estimated from theinformation of 50 scans around the scan in such cases.

The tangent altitude for L2 data is retrieved as an altitude offset.

For the retrieval of Band C, a priori value of the tangent altitude is provided from
Band A or B. (There are operational modes with Band A+C and Band B+C.)

This version of L2 product includes some profiles which is inadequate for scientificuse. In using these products, it is strongly recommended to pick up usable profiles
according to the following conditions:
The converged profiles can be picked up with the condition of NumIterPerform> 0. The criteria is the most credible quality information, but only 40% of allproducts would meet this condition.

The nearly converged profiles can be picked up with the condition of－1－

RadianceResidualRMS < 0.6. About 70% of all products would meet thiscondition.
L2 product includes altitude range not usable for validation and/or science. If theL2Precision is more than 50% compared to the AprioriError, it is probable that L2
algorithm is just answering a priori. (L2Precision and AprioriError are defined as
HDF EOS5 names in the SMILES L2 products.)
2.

Improvements

The scan data in the L2 product appears in order of observation time.

Irregular values in "Longitude" and "SolarZenithAngle" field have been corrected.

L2 processing has been carried out all for the L1B data. L2 product has about 1400
profiles / day.

3.

Remaining Issues after ver. 0024

In the forward model we notice a bug for the antenna pattern. In the current
version of antenna pattern, consideration for 0.5-second antenna moving is not
sufficient. It should be considered that the antenna is moving during the 0.5 second
AOS integration.

Hydrostatic assumption is broken for the version 0032. This will be corrected infuture release.

Results from Band A and B are not consistent in version 0032, such as O3, HCl etc.

HOCl, CH3CN, HNO3 and BrO data in band A look not usable.

HNO3 data in band C show +20% systematic errors.

O3 isotope products have not been checked yet.

4.

Newly Found Issue in ver. 0032



There seems to be some differences in the observed data between two spectrometers
AU1 and AU2. The retrieval results based on the Band A observation might include
discripancies depending on whether the observation was done with AU1 (in setting3: Band A+B) or with AU2 (in setting 2: Band C+A).

－2－