US 11,740,365 B2
Positional error prediction device, prediction model generation device, positional error prediction method, prediction model generation method, and program
Masahiro Yamada, Tokyo (JP); Kenji Takao, Tokyo (JP); and Takeshi Korenaga, Tokyo (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES MACHINERY SYSTEMS, LTD., Hyogo (JP)
Appl. No. 16/970,405
Filed by MITSUBISHI HEAVY INDUSTRIES MACHINERY SYSTEMS, LTD., Hyogo (JP)
PCT Filed Feb. 19, 2018, PCT No. PCT/JP2018/005698
§ 371(c)(1), (2) Date Aug. 17, 2020,
PCT Pub. No. WO2019/159353, PCT Pub. Date Aug. 22, 2019.
Prior Publication US 2021/0109233 A1, Apr. 15, 2021
Int. Cl. G01S 19/39 (2010.01); G01S 19/22 (2010.01); G01S 19/25 (2010.01); G01S 19/31 (2010.01); G01S 19/51 (2010.01)
CPC G01S 19/396 (2019.08) [G01S 19/22 (2013.01); G01S 19/25 (2013.01); G01S 19/31 (2013.01); G01S 19/51 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A positional error prediction device comprising:
a satellite position acquisition unit that acquires a position of a satellite from which a signal can be received, at target date and time on a target point at which a positional error prediction is performed;
a relative relationship value acquisition unit that acquires a relative relationship value between the position of the satellite and an observation start position of the satellite at the target point, wherein the observation start position of the satellite is a position at which a reception of the signal from the satellite is firstly started at the target point; and
an error prediction unit that predicts a positional error at the target date and time on the target point, based on the relative relationship value and a positional error prediction model generated in advance,
wherein the relative relationship value acquisition unit acquires the relative relationship value based on a multipath generation region, wherein the multipath generation region is defined as a partial region in an orbit of the satellite by a predetermined distance threshold from the observation start position in a region from the observation start position to a zenith of a celestial sphere centered on the target point.