US 11,703,600 B2
Satellite radio wave receiving device, electronic timepiece, positioning control method, and non-transitory computer-readable storage medium
Takeshi Matsue, Kokubunji (JP)
Assigned to CASIO COMPUTER CO., LTD., Tokyo (JP)
Filed by CASIO COMPUTER CO., LTD., Tokyo (JP)
Filed on Feb. 14, 2022, as Appl. No. 17/670,984.
Application 17/670,984 is a continuation of application No. 16/294,181, filed on Mar. 6, 2019, granted, now 11,280,915.
Claims priority of application No. 2018-040629 (JP), filed on Mar. 7, 2018.
Prior Publication US 2022/0171075 A1, Jun. 2, 2022
Int. Cl. G01S 19/39 (2010.01); G01S 19/34 (2010.01)
CPC G01S 19/396 (2019.08) [G01S 19/34 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A satellite radio wave receiving device comprising:
one or more processors configured to:
cause a receiver to start a receiving operation of receiving radio waves from positioning satellites;
perform a current position calculation to calculate a current position based on the radio waves received by the receiver;
calculate a positioning accuracy in a horizontal direction of the current position and a positioning accuracy in an altitude direction of the current position;
in response to determining that the positioning accuracy in the horizontal direction satisfies a first criterion and that a number of the positioning satellites from which radio waves are received is equal to or more than a lowest setting number, decide to adopt the current position;
in response to determining that the positioning accuracy in the horizontal direction satisfies the first criterion, that the number of the positioning satellites from which radio waves are received is less than the lowest setting number, and that the positioning accuracy in the altitude direction satisfies a second criterion, decide to adopt the current position; and
in response to determining that the positioning accuracy in the horizontal direction satisfies the first criterion, that the number of the positioning satellites from which radio waves are received is less than the lowest setting number, and that the positioning accuracy in the altitude direction does not satisfy the second criterion, decide not to adopt the current position.