Added documents:
- Swot characteristics for POD processing
- Description of the theoretical attitude laws for the satellites Sentinel-6 and Swot
- Description of the quaternion files for Swot
Updated documents
- DORIS satellites models implemented in POE processing (added Swot)
- Frequency shift mode of the 3rd and 4th generation beacons (previously Frequency shift mode of the 3rd generation beacon)
- Station frequency shift (added GAVC)
