US 12,078,733 B2
Navigation Satellite System reception device, method for processing Navigation Satellite signal from same, and program
Seiji Yoshida, Tokyo (JP); and Masakatsu Fujiwara, Tokyo (JP)
Assigned to Nippon Telegraph and Telephone Corporation, Tokyo (JP)
Filed by Nippon Telegraph and Telephone Corporation, Tokyo (JP)
Filed on Mar. 7, 2023, as Appl. No. 18/118,503.
Application 18/118,503 is a continuation of application No. 17/257,922, abandoned, previously published as PCT/JP2019/027537, filed on Jul. 11, 2019.
Claims priority of application No. 2018-133069 (JP), filed on Jul. 13, 2018.
Prior Publication US 2023/0251388 A1, Aug. 10, 2023
Int. Cl. G01S 19/22 (2010.01); G01S 19/28 (2010.01); G01S 19/35 (2010.01)
CPC G01S 19/22 (2013.01) [G01S 19/28 (2013.01); G01S 19/35 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A navigation satellite system reception apparatus for performing at least one of positioning processing or time synchronization processing with a navigation satellite based on a navigation satellite signal received from a plurality of navigation satellites, the navigation satellite system reception apparatus comprising:
an orbit information acquisition unit, implemented with one or more processors, configured to acquire orbit information of a navigation satellite of the plurality of navigation satellites;
a position information acquisition unit, implemented with one or more processors, configured to acquire position information of an installation position of the navigation satellite system reception apparatus;
an azimuth information acquisition unit, implemented with one or more processors, configured to acquire azimuth information of an azimuth perpendicular to a wall surface of an obstruction present adjacent to the navigation satellite system reception apparatus, wherein the azimuth information acquisition unit comprises a support base (i) fixed to the wall surface of the obstruction and supporting an antenna of the navigation satellite system reception apparatus at a position at a particular distance from the wall surface and (ii) protruding in a direction perpendicular to the wall surface of the obstruction and extends horizontally and an azimuth meter arranged on the support base and measuring the azimuth information perpendicular to the wall surface of the obstruction;
a mask region calculating unit, implemented with one or more processors, configured to calculate a mask region for selecting a navigation satellite of the plurality of navigation satellites to be a target of processing in the positioning processing or the time synchronization processing, based on the azimuth information, wherein the mask region is identical to or is included in a region on a side opposite to a region in an azimuth toward an open space side with respect to the wall surface of the obstruction with a boundary being both azimuths perpendicular to the azimuth toward the open space side with respect to the wall surface of the obstruction in polar coordinates with a center being the installation position of the navigation satellite system reception apparatus; and
a navigation satellite signal processing unit, implemented with one or more processors, configured to:
calculate an azimuth and an angle of elevation of each of the plurality of navigation satellites with reference to the navigation satellite system reception apparatus based on the orbit information and the position information;
select a navigation satellite of the plurality of navigation satellites to be a target of processing based on the azimuth and the angle of elevation that are respectively calculated and the mask region; and
perform at least one of the positioning processing or the time synchronization processing based on the navigation satellite signal received from the navigation satellite that is selected.