VEGETATION - 2000
Maggiore - Italy, 3-6 April 2000
A software for pre-processing VEGETATION L-Band Data
European Commission, Joint Research Center, Space Applications Institute
Global Vegetation Monitoring Unit
e-mail : email@example.com ; http://www.mtv.sai.jrc.it/
(pdf file, 205 k)
VEGETATION Programme allows a daily monitoring of terrestrial vegetation
cover through remote sensing, at regional and global levels. The instrument,
funded by the EC at 50%, is part of the SPOT 4 payload. This satellite,
launched the 24th Mars 1998, deliver measurements which were specifically
tailored to monitor land surfaces’ parameters with a frequency of about
once a day on a global basis and a medium spatial resolution of 1 kilometre
(2200 Km swath width and 300m of geolocation accuracy).
associated ground services for processing and distribution are full operational
since the end of 1998 where two ground processing services:
Centralise/Global Processing is performed by the CTIV (Centre de Traitement
d’Images VEGETATION at Mol – Belgium). This Centralise Ground Segment
will process instrument measurements at global scale to offer standard
high quality products to the general users’ community. The daily global
VEGETATION data (VGT) are downlinked via VEGETATION X-Band transmission
in Kiruna (Sweden) and transmit them to the CTIV for processing.
Local Processing is performed by the local VEGETATION L-Band receiving
stations with a specialised pre-processing system called SPACE-VGT. The
VGT L-Band product has 1Km of geolocation accuracy and the radiometry
accuracy is equivalent to that of VGT-P products. These products are mainly
addressed to a user’ community with particular thematic needs where the
(near-) real-time access to VEGETATION data drive their applications.
presentation deals with a description (functional and architectural) of
the SPACE-VGT software. The Joint Research Centre – Space Application
Institute has full developed the local L-Band pre-processing chain and
this software will be delivered free of charge to the VEGETATION programme.
This will be distributed to the officially VEGETATION registered users
a general way, local VEGETATION L-Band receiving stations demodulate and
store local VGT Level 0 image data files from the L-Band transmission
of the VEGETATION instrument. The software processes these local VGT Level
0 data files to produce a pre-processed product. The solar and instrument
(zenith and azimuth) angles associated to each pixel are also stored.
detailed presentation of this system, its scientific objectives, data
input/output description, image radiometric/geometric accuracy and pre-processing
algorithms will be made. During the VGT-2000 meeting a demonstration of
this system will be available.