System and method for transforming atmospheric corrections between correction systems

A method for transforming atmospheric corrections between correction systems, the atmospheric corrections received at a client device including a Global Navigation Satellite System (GNSS) receiver, the method comprising:

• receiving, at the client device, first correction data from a first correction system, wherein the first correction data includes at least a first orbit correction value, a first clock correction value, and a first code or phase bias correction value;
• receiving, at the client device, second correction data from a second correction system, wherein the second correction data includes at least a second orbit correction value, a second clock correction value, a second code or phase bias correction value, and an atmospheric correction value;
• calculating, at the client device, a first full range-level correction value based on the first correction data;
• calculating, at the client device, a second full range-level correction value based on the second correction data;
• calculating a full range-level difference value as a difference between the first full range-level correction value and the second full range-level correction value;
• adjusting, by the client device, the atmospheric correction value received from the second correction system utilizing the full range-level difference value to produce an adjusted atmospheric correction value;
• and
• calculating, by the GNSS receiver, a position based on GNSS signals and utilizing the first correction data with the adjusted atmospheric correction value.

A Global Navigation Satellite System (GNSS) receiver of a client device configured to receive one or more GNSS satellite signals from a plurality of GNSS satellites, the GNSS receiver comprising:

• a processor configured to:
• receive first correction data from a first correction system;
• receive second correction data from a second correction system, wherein the second correction data includes an atmospheric correction value;
• adjust the atmospheric correction value received from the second correction system utilizing the first correction data received from the first correction system with the second correction data received from the second correction system to produce an adjusted atmospheric correction value, wherein the adjusted atmospheric correction value is based on at least a difference between the first correction data and the second correction data;
• and
• calculate a position utilizing the GNSS satellite signals, the first correction data, and the adjusted atmospheric correction value.