Spectral Characterisation of the Osterseen Lake District - EARSeL ...

3 DATA
Hamburg
Germany
Munich
Berlin
Lustsee Grobensee
N
Westl.
Breitenauersee
Härtlings Sill
Lintensee
Stechsee
Ameisensee
Östl. Breitenauersee
Ground Water
Wellspring
Großer Ostersee
Eishaussee
Brauhaussee
Herrensee
Fischkaltersee
Forchensee
Wolfelsee
Sengsee
Fohnsee
Schiffhüttensee
Waschsee
Figure 1. Location of the test area "Osterseen Lake District" south of Munich, Germany.
0 500 m
3.1. Hyperspectral remote sensing data acquired by ROSIS sensor
The Reflective Optics System Imaging Spectroradiometer (ROSIS) was developed since 1986 in cooperation
between DLR, GKSS, and MBB (now Astrium) [5][6][7]. It is a push broom scanner with 512 spatial and 115
spectral pixels recording in the wavelength range between 430 nm and 860 nm. The spectral sampling interval
amounts 4 nm and the full width at half maximum is about 7.5 nm. With an instantaneous field of view of 0.59
mrad the spatial resolution results in 2.8 x 2.8 m² at a flight altitude of 5,000 m.
The data presented in this study were recorded on June 5 th , 2001 between 10:42 and 11:20 UTC in a northerly flight
direction at an altitude of about 5,000 m. The data were radiometrically corrected based on laboratory
measurements using a calibrated light source. The geometric correction of the distortions due to flight attitude (roll,
pitch, and yaw angles) uses information from the airplane's inertial system, the flight velocity, the altitude above
ground, and the focal length of the telescope [8]. The radiometrically and geometrically corrected composit of two
flight lines is shown in Fig. 2.
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