COSMO-SKYMED DI SECONDA GENERAZIONE NON-STANDARD OPERATIONAL MODES

摘要

COSMO-SkyMed di Seconda Generazione (CSG) system is the follow-on mission of the COSMO-SkyMed (CSK) mission, currently operating with four Earth Observation SAR satellites. The two CSG follow-on satellites aim at providing operational continuity to CSK with increased performance, flexibility and ability to respond to updated civilian and defence user needs. An important part of the improvements is the possibility to increase the user requests satisfaction by means of new acquisition modes, the so-called Non-Standard modes. The Non-Standard Acquisition Modes are divided in 2 classes, the Operational and the Experimental ones. Nonstandard Operational modes are the DI2S S2 Multi-Swath mode and Spotlight on Theatre. Both modes will allow satisfying more service requests in a defined area; the interested requests would otherwise be in direct conflict each other if acquired with standard, zero-doppler acquisitions. The DIscete Stepped Strip (DI2S) technique, exploits the SAR capability to work at doubled PRF. The Spotlight on a Theatre would be similar to standard Spotlight 2A, 2B or 2C apart from in a squinted (pitched) attitude, i.e. the images are not zero-doppler acquisitions. The satellite will be able to acquire while maneuvering around the pitch axis, allowing acquiring a greater number of images on a small area (a theatre).