The Leicester AATSR Global Analyser (LAGA) - Quick-Look Analysis of Large-Scale Oeanic Processes
David Llewellyn-Jones(1), Gary Corlett(1) and Simon Good(2)
(1) University of Leicester, Space Research Centre, LEICESTER LE1 7RH, United Kingdom
(2) Met Office, FitzRoy Road, EXETER EX1 3PB, United Kingdom
A pc-based utility has been devised for the rapid display and preliminary analysis of long time-series of satellite data such as , for example, the 16-year series of monthly mean global fields of SST measured by the ATSR series of instruments.
The package gives investigators immediate access to the data, which are presented in the form of monthly averages and spatial averaged to half-degree or one-sixth degree longitude-latitude grids. There are simple button-operated facilities for defining and calculating box-averages; producing time-series of such averages; defining and displaying transects and their evolution over time; and the examination anomalous behaviour by displaying the difference between observed values and values derived from climatological means. By using these facilities an investigator rapidly gains familiarity with such processes as annual variability, the El Niño effect, as well as major current systems such as the Gulf Stream and other climatically important phenomena.
The software package, whose capabilities will be explained and demonstrated, provides a rapid introduction to the data and to the oceanic processes which are observed. Although it can be used by any investigator who needs a 'quick look', it is particularly well suited to new investigators or students.
Keywords: ESA European
Space Agency - Agence spatiale europeenne,
observation de la terre, earth observation,
satellite remote sensing,
teledetection, geophysique, altimetrie, radar,
chimique atmospherique, geophysics, altimetry, radar,