Abstract: A positioning apparatus is provided that may include a pseudo distance measurement unit that measures the pseudo distance between the positioning satellite and the antenna, an ionosphere delay amount calculating unit that calculates an ionosphere delay amount included in the pseudo distance, and a pseudo distance corrector that executes a positioning calculation by correcting the pseudo distance based on the ionosphere delay amount. The ionosphere delay amount calculating unit sets the upper limit of the partition number between the positioning satellite and the antenna, determines the total number of electrons sTEC by integrating in the range of less than the upper limit of the partition number, and calculates the ionosphere delay amount based on the determined total number of electrons sTEC.

Abstract: A method for searching a signal to capture a target signal. Integrated correlation values are acquired with all code phases by setting a plurality of frequencies at intervals of 1,000 Hz into a single group. A peak correlation value that is a highest integrated correlation value with each frequency forming the group is acquired. The peak correlation values of the respective frequencies are compared to each other, a highest value thereof is set to be a highest peak value, and a second highest value thereof is set to be a highest noise value. If a ratio between the highest peak value and the highest noise value is lower than a threshold, it is determined that cross-correlation occurred, and if the ratio is higher than the threshold, the highest peak value is determined to be from the target signal, and the signal is captured.

Abstract: A method for searching a signal to capture a target signal. Integrated correlation values are acquired with all code phases by setting a plurality of frequencies at intervals of 1,000 Hz into a single group. A peak correlation value that is a highest integrated correlation value with each frequency forming the group is acquired. The peak correlation values of the respective frequencies are compared to each other, a highest value thereof is set to be a highest peak value, and a second highest value thereof is set to be a highest noise value. If a ratio between the highest peak value and the highest noise value is lower than a threshold, it is determined that cross-correlation occurred, and if the ratio is higher than the threshold, the highest peak value is determined to be from the target signal, and the signal is captured.

Abstract: A positioning apparatus is provided that may include a pseudo distance measurement unit that measures the pseudo distance between the positioning satellite and the antenna, an ionosphere delay amount calculating unit that calculates an ionosphere delay amount included in the pseudo distance, and a pseudo distance corrector that executes a positioning calculation by correcting the pseudo distance based on the ionosphere delay amount. The ionosphere delay amount calculating unit sets the upper limit of the partition number between the positioning satellite and the antenna, determines the total number of electrons sTEC by integrating in the range of less than the upper limit of the partition number, and calculates the ionosphere delay amount based on the determined total number of electrons sTEC.