Coarse attitude determination from gnss antenna gain profiling

An attitude determination module (ADM) connectable to a satellite signal receiver operating to generate receiver-calculated values associated with a received satellite signal, said ADM comprising:

• an azimuth adjustment submodule configured to receive and adjust receiver-calculated said values to compensate for receiver heading;
• a comparator submodule configured to determine difference between a receiver-calculated value associated with a received satellite signal and an expected value based on an antenna gain profile;
• an attitude plane submodule for providing an attitude plane based on said differences;
• and an inclination determination submodule configured to determine inclination of said attitude plane with a horizontal reference plane.

A method for determining platform attitude, comprising:

• comparing receiver-based values associated with a received satellite signal with expected values;
• using difference between said receiver-based and said expected values to determine an attitude plane;
• and
• determining inclination of said attitude plane with a reference plane to provide said receiver attitude.