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LBALC: Location Based Altimeter and Location Calibration Disclosure Number: IPCOM000016445D
Original Publication Date: 2003-Jul-25
Included in the Prior Art Database: 2003-Jul-25

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Altimeter and positioning systems can be found on a variety of mobile devices such as watches, GPS devices or mobile phones. These systems, and especially the altimeter, need to be recalibrated regularly to deliver good values. Additionally, weather information like temperature or pressure cannot be provided without additional hardware. This invention suggests that each time a user gets to a "recalibration station" the mobile is provided with the exact informations for recalibrating. This station can either be a local box to which the mobile connects e.g. via Bluetooth or the current base station. As soon as the user is at such a place his mobile device connects to a LBS- (Location Based System) Server, that gets the exact informations from other sensors, which are located at the same place. If there are no sensors it is also possible to interpolate the values from other sensors in the area. Now all the information can be displayed and used by the mobile device even if it has no own sensors for the specific tasks.