The ARlES radiometer, built in 1975 by the LMD - CNRS, enables us to numerically acquire images both in the visible spectrum, in the thermal infrared region (10.5-12.5 1/1m) and in the near IR region (0.5-
m). Experiments during the last decade have proved the importance of these data for regional archaeology both for the detection of archaeological remains and for the knowledge brought by micro topographic features significant of the landscape history. A new software has been designed in 1991 in the Centre de Recherches Géophysiques of Garchy for downloading this information on a PC, visualize and process it interactively on a high definition screen. This software is portable. Data are stored on a magnetic tape or an optical disk. Color graphic output is clone after palette selection and different numerical computations (geometrical corrections for the pitchroll-anamorphosis deformation, contrast enhancement and classification). This software has been developped for editing the images just a few homs after 
the flight. The information brought by the joint use of both channels is important as shown by the 
examples of a recent flight in Beauce. The choice of the time of flight is also very important and is the result of the monitoring, several weeks before the flight, of the temperature flux in the ground, through the existing meteorological network.