ARCTIC NRT SERVICE 2002/2003
|Mirror sites at Uni-Heidelberg , Uni-Bremen and DLR Oberpfaffenhofen|
|H o m e||O v e r v i e w A r c h i v e|
near real time (NRT) Service 2002/2003 is a joint collaboration between the
Institutes of Environmental Physics (IUP) at the Universities of Bremen and
Heidelberg, the German Aerospace Center (DLR/DFD and DLR/IAP). It
is a continuation of previous GOME NRT data services since the winter 1998/1999
main goal of the Arctic NRT Service is to provide a quick
and comprehensive overview on
important meteorological and chemical quantities which allow to characterise the
state of stratospheric chlorine activation.
In particular it is aimed to support coordination of field campaigns for
measuring stratospheric trace constituents and to inform the public on the
actual state of the atmosphere with regard to ozone depletion.
here a more detailed description of the GOME maps of NO2
the GOME maps and trace gas data are produced in near real time, the results of
the NRT data analysis is considered preliminary.
The NRT level 1 data products (radiance and solar irradiance) are generated by
the GOME data processor (GDP) located at ESA's Kiruna ground station, which is
one of four ESA stations receiving global data from the ERS-2 (European Remote
Sensing satellite) carrying GOME. In December 2001 and January 2002 additional
GDPs were installed at Gatineau and Maspalomas, respectively. The GDP was
developed and is operated by DLR/IMF in Oberpfaffenhofen; the internet
connection between Kiruna GS and NILU for the level-1 data transmission is
kindly provided by the Swedish Space Corporation.
In the normal operational data flow all GOME transmissions (raw data) are collected on tape at each ground station and the tapes are mailed to DLR Oberpfaffenhofen. Level 1 data for further processing become typically available after one to several weeks depending on the location of the stations. The NRT data service represents an enormous speed-up of data dissemination.