Method and arrangement for determining altitude

摘要

The invention relates to a portable electronic device and method for determining altitude. The device can comprise a satellite-positioning sensor for determining the elevation of the device on the basis of satellite data, a barometric sensor for measuring atmospheric-pressure information and/or an acceleration sensor for measuring acceleration information, and means for determining the altitude reading on the basis of the satellite-based elevation and the atmospheric-pressure and/or acceleration information. According to the invention, the means for determining the altitude reading are arranged to calculate a corrected altitude reading with the aid of the rate of change in elevation determined at least partly on the basis of the elevation determined on a satellite basis and atmospheric-pressure and/or acceleration information. With the aid of the invention, the altitude profile of exercise can be measured precisely.

主权项

1. A system for determining altitude comprising:
a portable electronic device; one of a first satellite-positioning sensor coupled to the device, the satellite-positioning sensor configured for determining a satellite-based elevation of the device on the basis of satellite data, and a mechanism for receiving altitude-position information from a first separate unit including a second satellite-positioning sensor; at least one of a first barometric sensor for measuring atmospheric-pressure coupled to the device, a mechanism for receiving atmospheric-pressure information from a second separate unit including a second barometric sensor, a first acceleration sensor for measuring atmospheric-pressure information coupled to the device, and a mechanism for receiving acceleration information from a third separate unit including a second acceleration sensor; and a processor coupled to the device, the processor configured for determining an altitude reading on the basis of the satellite-based elevation, and at least one of the atmospheric-pressure information and the acceleration information, the processor arranged to calculate a corrected altitude reading with the aid of a rate of change of the elevation on the basis of at least one of a satellite-based determined elevation data, and the atmospheric pressure information and/or the acceleration information based on dynamic response time of the atmospheric pressure information and/or the acceleration information with respect to the rate of elevation change.