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[Movie] Benefits of QZSS: High-accuracy positioning

Introduces how ionospheric errors are improved by multi-frequency positioning, as well as the Sub-meter Level Augmentation Service (SLAS) and Centimeter Level Augmentation Service (CLAS).

[Benefits of QZSS: High-accuracy positioning]
The ionosphere is a layer of the atmosphere that is charged with electricity, and is a major cause of decreased satellite positioning accuracy. QZS help resolve this issue as well.
[Ionosphere]
[Helps improve ionospheric errors]

Ionospheric errors result when a satellite signal is delayed by passing through the ionosphere.
[Satellite signals are delayed by passing through the ionosphere]
[Using two frequencies to calculate the amount of delay]
[Using differences in arrival times to resolve ionospheric errors]

When using satellite signals of two frequencies, it is possible to calculate the amount of delay through the ionosphere and improve positioning accuracy.
QZS can transmit multiple frequencies. In FY2018 the number of multi-frequency GPS satellites will be increased, allowing for high-accuracy positioning.
[Can transmit multiple frequencies]
[High-accuracy positioning with multi-frequency GPS]

The Sub-meter Level Augmentation Service (SLAS), which includes ionospheric information, will be transmitted to improve errors for affordable receivers that consume little power and cannot receive multiple frequencies.
[Resolving errors through the Sub-meter Level Augmentation Service (SLAS), including ionospheric information]

For users who require even more accurate positioning, the Centimeter Level Augmentation Service (CLAS) will be transmitted from GNSS-based control stations.
[Centimeter Level Augmentation Service (CLAS) using GNSS-based control stations]
[*Receivers are not portable]

Various types of high-accuracy positioning will help optimize and enhance services such as transportation, agriculture, and civil engineering.
[Optimization and enhanced services through high-accuracy positioning]