Title:
2周波数の一方で測定データが利用できない場合に短期間バックアップ2周波数ナビゲーションを行なう方法
Document Type and Number:
Japanese Patent JP2007529010
Kind Code:
A
Abstract:
The present invention includes a method for performing backup dual-frequency navigation during a brief period when one of two frequencies relied upon by dual-frequency navigation is unavailable. The method includes synthesizing the code and carrier-phase measurements on the unavailable frequency using the carrier-phase measurements on the retained frequency and a model of ionospheric refraction effects, which is updated when measurements on both frequencies are available.
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Inventors:
Sharp, Richard, Tee.
Nelson, Frederick, W.
Pickett, Terence, Dee.
Hatch, Ronald, Earl.
Yang, Yun Chun
Nelson, Frederick, W.
Pickett, Terence, Dee.
Hatch, Ronald, Earl.
Yang, Yun Chun
Application Number:
JP2007502851A
Publication Date:
October 18, 2007
Filing Date:
February 08, 2005
Export Citation:
Assignee:
Navcom Technology, Inc.
International Classes:
G01S19/43; G01C21/00; G01S1/00; G01S5/02; G01S5/14; G01S19/07; G01S19/11; G01S19/32; G01S19/44; G01S19/48; G08G1/0969
Attorney, Agent or Firm:
Yoshiyuki Inaba
Shinji Oga
Toshifumi Onuki
Shinji Oga
Toshifumi Onuki