N) exists 
s and the 
. Table 2 
  
n factor 
1)/mW 
E 
0.744 
0.934 
1.005 
5.721 
0.405 
0.289 
0.508 
0.651 
0.691 
0.381 
1.076 
  
  
radiance 
ds (lamp 
estimate 
alibration 
mated by 
's that the 
under the 
also lead 
leveloped 
pration of 
  
Manfred Schroeder 
e The calibration values for MOMS-2P (Table 2) are for all channels by 25-39% lower than those obtained 16 
8. 
months earlier with inflight sun calibration [5]. A clear reasonable explanation for this change can not be 
given. There may be two assumptions: 
(1) a real loss in sensitivity occurred which is in line with the operational experience that the gains 
have to be set one value higher than before to get high quality images or 
(2) the inflight sun calibration was incorrect probably to an incorrect reflectance figure of the diffuser 
plate used in the calibration procedure. 
CONCLUSIONS 
The following conclusion can be drawn from the presented investigations: 
9. 
Vicarious calibration delivers reliable and repeatable result 
Atmospheric radiation transfer programs with sufficient accuracy exist for vicarious calibration 
Good calibrated space sensors as SPOT can be used for intercalibration of new sensors 
The increased number of satellites and the different data types make intercalibration an essential task 
ACKNOWLEDGEMENTS 
We would like to thank CNES for providing SPOT-images of the La Crau area. We also thank LISE for the 
measurements with the CIMEL photometer. 
10. 
[1] 
REFERENCES: 
C. Schmechtig, R. Santer, J.C. Roger, A. Meygret 
An automatic radiometer ground-based station for vicarious calibration 
The European Symposium on Aerospace Remote Sensing. London ... UK Spetember 22-26, 1997. 
ZEISS MCS Multi Channel-Spektrometer Produktinformation 
H. Neckel, D. Labs 
The Solar Radiation between 3300 and 12500 À 
, Solar Physics 90 (1984) 
E. Vermote, L. Gonzales 
Second Simulation of Satellite Signal in the Solar Spectrum Release: 6.0 , 
http://www.loasys.univ-lillel.fr/Msixs/msixs eb.htm/ 
R. Müller, M. Schroeder, P. Reinartz, M. Lehner 
Radiometric Calibration and Image Quality Analysis of MOMS-2P Data 
18. Wissenschaftlich - Technische Jahrestagung des DGPF/15. DFD- Nutzerseminar des DLR, DGPF, 
Band 7, 1999, ISSN 0942-2870 
A. Meygret, M. Dinguirard, P. Henry 
Eleven Years of Experience and Data in Calibration SPOT HRV Cameras , 
ISPRS-Workshop: Sensors and Mapping from Space,Proceedings, IPI-Hannover, Volume 17, 1997 
M. Schroeder, R. Miiller, P. Reinartz, M. Dinguirard, L. Poutier, X. Briottet 
Vicarious Radiometric Calibration of MOMS at La Crau Test Site and Intercalibration with SPOT ; 
ISPRS-Workshop: Mapping from Space, Institut für Photogrammetrie und Ingeneuervermessung IPI, 
Universität Hannover, Nr. 19, 1999 
L. Poutier 
MOMS In-Flight Absolute Calibration , 
Technical Note, March 2000 
  
International Archives of Photogrammetry and Remote Sensing. Vol. XXXIII, Part Bl. Amsterdam 2000. 287