Patents by Inventor Takeyasu Sakai

Takeyasu Sakai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Calculation method of the amount of zenith troposphere delay, and a correcting method of troposphere delay of satellite positioning signal
    Patent number: 8665146
    Abstract: This invention relates to the troposphere delay produced when the electromagnetic waves from a satellite or astronomical body pass through the troposphere, in particular, it is related to a calculation method of an estimated value of the amount of zenith troposphere delay in real time, and troposphere delay of the satellite positioning signal in the case of positioning using the estimated value of this calculated amount of zenith troposphere delay is related with a correcting method.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: March 4, 2014
    Assignee: Electronic Navigation Research Institute
    Inventors: Noboru Takeichi, Takeyasu Sakai, Sounosuke Fukushima, Ken Ito
  • CALCULATION METHOD OF THE AMOUNT OF ZENITH TROPOSPHERE DELAY, AND A CORRECTING METHOD OF TROPOSPHERE DELAY OF SATELLITE POSITIONING SIGNAL
    Publication number: 20100194639
    Abstract: This invention relates to the troposphere delay produced when the electromagnetic waves from a satellite or astronomical pass through the troposphere, in particular, it is related with the calculation method of a estimated value of the amount of zenith troposphere delay to real time, and troposphere delay of the satellite positioning signal in the case of positioning using the estimated value of this calculated amount of zenith troposphere delay is related with a correcting method.
    Type: Application
    Filed: December 28, 2007
    Publication date: August 5, 2010
    Inventors: Noboru Takeichi, Takeyasu Sakai, Sounosuke Fukushima, Ken Ito