Navigation satellite system, electronic device, and positioning method

A positioning method for a navigation satellite system including first and second electronic devices that calculate position coordinates of the first and second electronic devices by using a radio wave from a global navigation satellite system (GNSS) satellite, respectively,

• the positioning method comprising:
• causing the first electronic device to receive GNSS correction data from a fixed station installed at a known point;
• causing the first electronic device to decide, based on the received GNSS correction data, integer ambiguity in a difference between a first carrier phase of a first radio wave received by the fixed station and a second carrier phase of a second radio wave received by the first electronic device and calculate a path difference between the first radio wave and the second radio wave to calculate first relative coordinates of the first electronic device with respect to the fixed station;
• causing the first electronic device to transmit the integer ambiguity to the second electronic device;
• causing the second electronic device to receive the integer ambiguity from the first electronic device;
• and
• causing the second electronic device to calculate, based on the GNSS correction data, a difference between a third carrier phase of a third radio wave received by the second electronic device and the first carrier phase and calculate, by using the integer ambiguity, a path difference between the first radio wave and the third radio wave to calculate second relative coordinates of the second electronic device with respect to the fixed station.

A first electronic device that calculates position coordinates of the first electronic device by using a radio wave from a global navigation satellite system (GNSS) satellite,

• the first electronic device comprising:
• a receiver that receives GNSS correction data from a fixed station installed at a known point;
• a first calculator that decides, based on the received GNSS correction data, integer ambiguity in a difference between a first carrier phase of a first radio wave received by the fixed station and a second carrier phase of a second radio wave received by the first electronic device and calculates a path difference between the first radio wave and the second radio wave to calculate first relative coordinates of the first electronic device with respect to the fixed station;
• and
• a transmitter that transmits the integer ambiguity to a second electronic device that calculates position coordinates of the second electronic device by using a radio wave from the GNSS satellite.

A second electronic device that calculates position coordinates of the second electronic device by using a radio wave from a global navigation satellite system (GNSS) satellite,

• the second electronic device comprising:
• a receiver that receives, from a first electronic device that calculates position coordinates of the first electronic device by using the radio wave from the GNSS satellite, integer ambiguity, which is decided based on GNSS correction data in the first electronic device, in a difference between a first carrier phase of a first radio wave received by a fixed station and a second carrier phase of a second radio wave received by the second electronic device;
• and
• a second calculator that calculates, based on the GNSS correction data, a difference between a third carrier phase of a third radio wave received by the second electronic device and the first carrier phase and calculates, by using the received integer ambiguity, a path difference between the first radio wave and the third radio wave to calculate second relative coordinates of the second electronic device with respect to the fixed station.