In the years 1985-90, satellites equipped with push-broom instruments will provide 20 m resolution images over three visible and near infrared wavelenghts, and panchromatic 10 m resolution images. These are the "Satellites Probatoires d'Observations de la Terre" (SPOT), i.e. Experimental Remote Sensing Satellites of the french earth resources monitoring program. For the following period (1990-2000), this service can be improved in various ways, particularly by adding two SWIR channels centered on 1.65 and 2.2 micrometers and registered with the visible and near infrared channels. This paper shows the expected characteristics of the SWIR detectors, which are suitable for an instrument originating from that of SPOT, and also the procedure leading to the values proposed. The last paragraph gives a few examples of technologies that can be used (detector pattern, multiplex, cooling).