SMHI meeting March 3, 2010
Meeting starting at 12:00
Ending around 17:00
1) Lunch
2) mpop – Status and plans (Martin)
3) mipp – Status and plans (Lars)
4) pyresample – Status and plans (Esben)
5) Information model (Adam)
6) Future plans:
- Database oriented processing (Esben)
- System design ideas (Martin)
- Discussion
7) Actions and next meeting
8) Prepare presentation for Nordsat meeting
Of course each point is open for discussion as needed
Esben & Lars arrived around 12:30 (train delayed)
Meeting participants: Esben S Nielsen and Lars Ørum Rasmussen (DMI
Anna Geidne, Martin Raspaud and Adam Dybbroe (SMHI)
1) Lunch was good.
Adam writes the minutes.
2) Martin presented the mpop status and plans
A little discussion on overlays (coastlines and political borders). mpop currently adopts the PPS overlay interface, but this will be decoupled. We will still need to be able to overlay contours for internal use (not for external product dissemination) but it is low priority. Check GMT contours. DMI use GMT for contour overlays. PPS reads one static file (which is not even global) directly in Python and use PIL. Go for a simple solution.
3) Lars presented the mipp software – status and plans
See mipp.pdf on these pages.
We discussed that hdf5dmi.py should be placed outside the package.
Also mipp should take care of missing segments (make sure mipp does not break down if a segment is missing which happens occasionally).
Slicing is needed: Should make it possible to extract only a subset of the whole (geostationary) satellite disc
Simplify the interface.
Check for possible (vicarious) calibration information for Met-7. Currently the data handled by mipp is not calibrated – no physical units (8 bit counts – no Tbs/Rad)
We need to extend and define a common configuration file format. At the moment mpop and mipp has different configuration file formats.
Coffee
4) pyresample overview by Esben.
Esben briefly described the re-projection method implemented in pyresample.
The trick is to map both the input array and the output (target) area onto the same 3d Cartesian grid.
kd-tree algorithm (scipy) is used for fast nearest neighbor search.
5) Information model
Adam presented the result on a quick survey on existing standards and info models and made a proposal to go for the ODIM model with satellite extensions. After some discussion this approach was abandoned. It was decided to continue the homework on both DMI and SMHI to continue the surveys on existing info-models. But in order to get going, and unless other attractive solutions for a suitable information model emerge it was decided to start using the information model provided by the standard outlined in the NetCDF Climate and Forecast (CF) metadata Conventions. However, we need to study the CT standard in more detail. The information model of our choice must comply with the INSPIRE directive and the OGC standards. If this is not the case to day, we need to be confident that this will be the case in the near future.
6) Future plans
See db_aspects.pdf on these pages.
7) Next meeting. Week 24 at DMI is proposed.
It was suggested to invite Anders Henja, to present the ongoing work with the Baltrad technical platform.
8) Presentation to Nordsat group Thursday
Adam with the help of the group will make a summary from the agenda and minutes here on the gitHub