A multi-antenna GNSS system and method provide earth-referenced GNSS heading and position solutions. The system and method compensate for partial blocking of the antennas by using a known attitude or orientation of the structure, which can be determined by an orientation device or with GNSS measurements....http://www.google.com.au/patents/US8138970?utm_source=gb-gplus-sharePatent US8138970 - GNSS-based tracking of fixed or slow-moving structures
