Systems and methods for estimating and altitude of a mobile device based on detected temperature conditions

One or more non-transitory machine-readable media embodying program instructions that, when executed by one or more machines, cause the one or more machines to implement a method for monitoring one or more conditions before estimating an altitude of a mobile device, wherein the method comprises:

• receiving a reference pressure that was determined using a measurement of pressure measured by a reference pressure sensor, wherein the reference pressure specifies an estimated pressure at a reference altitude;
• determining if a temperature condition is detected;
• after determining that the temperature condition is not detected, computing a first estimate of an altitude of a mobile device using the reference pressure;
• and
• after determining that the temperature condition is detected,
• (i) computing an estimate of a pressure at the location of the reference pressure sensor using the reference pressure, a first measurement of temperature that was used to compute the reference pressure, an estimated altitude of the location of the reference pressure sensor, and the reference altitude, and
• (ii) computing a second estimate of the altitude of the mobile device using the estimate of pressure and a second measurement of temperature that was measured at another location that is different from the location of the reference pressure sensor.

A system for monitoring one or more conditions before estimating an altitude of a mobile device, wherein the system comprises one or more machines that are operable to perform operations comprising:

• receiving a reference pressure that was determined using a measurement of pressure measured by a reference pressure sensor, wherein the reference pressure specifies an estimated pressure at a reference altitude;
• determining if a temperature condition is detected;
• after determining that the temperature condition is not detected, computing a first estimate of an altitude of a mobile device using the reference pressure;
• and
• after determining that the temperature condition is detected,
• (i) computing an estimate of a pressure at the location of the reference pressure sensor using the reference pressure, a first measurement of temperature that was used to compute the reference pressure, an estimated altitude of the location of the reference pressure sensor, and the reference altitude, and
• (ii) computing a second estimate of the altitude of the mobile device using the estimate of pressure and a second measurement of temperature that was measured at another location that is different from the location of the reference pressure sensor.