OSISAF HL News http://osisaf.met.no News and Service Messages for the EUMETSAT Ocean and Sea Ice SAF High Latitude Center. en OSISAF logo http://osisaf.met.no/logos/OSISAFLogo_solid_S.jpg http://osisaf.met.no Tue, 30 Apr 2013 11:09:45 +0000 hourly 1 Sat, 27 Apr 2013 00:00:00 +0000 Sat, 27 Apr 2013 - Delayed sea ice products http://osisaf.met.no/news/#118 The OSI SAF sea ice products for 2013-04-26 were not distributed as usual on the morning of 2013-04-27, due to a production error. The files have been uploaded to the FTP server and can be collected as usual on:

ftp://osisaf.met.no/prod/ice or
ftp://osisaf.met.no/archive/ice

]]> Wed, 17 Apr 2013 00:00:00 +0000 Wed, 17 Apr 2013 - Missing data in all sea ice products http://osisaf.met.no/news/#117 Due to a technical problem at the common SSM/I and SSMIS processing center in the US, all our sea ice products with date 2013-04-16 show large areas of missing data.
The issue is now fixed, data flow is resumed, and we expect tomorrow's sea ice products to have nominal coverage.

]]> Wed, 3 Apr 2013 00:00:00 +0000 Wed, 3 Apr 2013 - Missing OSI SAF sea ice products http://osisaf.met.no/news/#116 During Easter there was a problem with the production of sea ice products at OSI SAF. No products were produced for the dates 24th and 25th March. Norminal production was resumed on the 26th.

The sea ice concentration, edge, type and drift products have been recovered, but based on SSM/I data instead of SSMIS data (no change in file structure or file naming). The sea ice drift products will not be reproduced. The missing products are now available on our ftp server in the usual directories (ftp://osisaf.met.no/prod/ice and ftp://osisaf.met.no/archive/ice). We are sorry for the inconveniences this data gap might have caused.

]]> Fri, 15 Mar 2013 00:00:00 +0000 Fri, 15 Mar 2013 - Problems with OSI SAF servers http://osisaf.met.no/news/#115 The OSI SAF FTP server and web portal experienced problems just after midnight today. The upgrade yesterday seems not to be stable, and the servers have been reset to the old setup. The servers are now back on line.

]]> Thu, 14 Mar 2013 00:00:00 +0000 Thu, 14 Mar 2013 - Upgrading OSI SAF servers http://osisaf.met.no/news/#114 The OSISAF high latitude FTP and web portal servers will be upgraded today at 1200 UTC. The services provided by these servers might be partly unavailable during the upgrade, which should take abort 30 minutes. This involves http://osisaf.met.no and ftp://osisaf.met.no.

If you have any problems after 1300 UTC, please report to us on email osisaf-manager@met.no.

]]> Thu, 7 Mar 2013 00:00:00 +0000 Thu, 7 Mar 2013 - SH LR Ice Drift available http://osisaf.met.no/news/#113 The OSI SAF Low-Resolution Sea Ice Drift (LRSID) product (OSI-405) over the Southern Hemisphere (SH) is now ready for distribution. Disseminations started 7th March, both over EUMETCast and from our FTP server (ftp://osisaf.met.no). The SH files are available at the same directories as the Northern Hemisphere (NH) files, with the same file name convention. The only difference is that \"nh\" is replaced with \"sh\" in the file names.

Updated validation report and Product User Manual will shortly be made available in the Documentation section.

Note that due to atmosperic noise and surface melting, it is not possible to process reliable ice motion vector during (austral) summer. The availability period for the OSISAF SH LRSID product is accordingly from April 1st to October 31st.

]]> Thu, 21 Feb 2013 00:00:00 +0000 Thu, 21 Feb 2013 - Updated validation information after switch to SSMIS http://osisaf.met.no/news/#112 Updated validation results for the sea ice concentration and sea ice edge products after the switch to SSMIS are now available at http://osisaf.met.no/validation/val_greenland.html. Select the "last quarter" plots. All the results after 19.02.2013 are based on SSMIS, while the results before are based on SSM/I.

]]> Thu, 21 Feb 2013 00:00:00 +0000 Thu, 21 Feb 2013 - Test products based on SSM/I available http://osisaf.met.no/news/#111 For those users who are interested in looking closer on the difference between sea ice products based on SSMIS and products based on SSM/I, we have made available products based on SSM/I at this location:
ftp://osisaf.met.no/prod_test/ice.
Be aware that these SSM/I-based products are not operational. The regular OSI SAF sea ice products based on SSMIS are available here:
ftp://osisaf.met.no/prod/ice.
The SSMIS products are labelled pre-operational since they have not been fully validated. The test products will be available until the pre-operational SSMIS-based products are declared operational.

]]> Fri, 1 Feb 2013 00:00:00 +0000 Fri, 1 Feb 2013 - Permanent switch to SSMIS http://osisaf.met.no/news/#110 The OSI SAF has now decided that the switch from SSM/I to SSMIS as input to the operational sea ice products is made permanent. This means that all the OSI SAF sea ice products previously based on SSM/I data are now based on SSMIS.

The validation of the sea ice products based on SSMIS is not complete yet, so the status of the products are changed from operational to pre-operational. The products will be pre-operational until the full validation is reviewed later this spring. This will have no influence on the distribution of the products. The file names are also the same as before, so as user you should not see any change. The only change is that the metadata will be updated with correct satellite information and the pre-operational status.

More intermediate validation results will be presented here next week.
Please contact us at osisaf-manager@met.no if you have any questions.

]]> Mon, 21 Jan 2013 00:00:00 +0000 Mon, 21 Jan 2013 - Use of SSMIS instead of SSMI in OSI SAF http://osisaf.met.no/news/#109 As reported this weekend, the OSI SAF has switched to using SSMIS data instead of SSMI data for the operational sea ice products. This change affects the products dated 19-01-2013 and newer. This change was done because the SSMI data we receive are currently corrupted. We will continue to use SSMIS data until further notice. Some illustration of the impact of this change on the ice concentration product can be seen on this web site:

http://osisaf.met.no/stories/sic_comparison_SSMIS_vs_SSMI

An issue with reduced coverage over ice sheets in the Antarctic has been corrected, with effect from the products dated 21-01-2013.

For any questions, please contact osisaf-manager@met.no.

]]> Sat, 19 Jan 2013 00:00:00 +0000 Sat, 19 Jan 2013 - SSMIS temporarily replaces SSMI http://osisaf.met.no/news/#108 As the SSMI data received at OSI SAF are still corrupted, we have chosen to switch to SSMIS data for the operational OSI SAF sea ice products. The use of SSMIS data for sea ice production have been tested for some time, but is not yet fully validated. Still, the tests so far has shown that the difference between using SSMI and SSMIS has only a small impact on the products.

This change will impact in the products to be delivered 20-01-2013, that is with date stamp 19-01-2013.

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