CPC G01S 7/412 (2013.01) [G01C 5/06 (2013.01); G01C 25/00 (2013.01); G01S 13/08 (2013.01)] | 20 Claims |
1. A method, comprising:
transmitting wireless signals from an electronic device in a direction corresponding to an expected ceiling location;
receiving reflections of the wireless signals at the electronic device;
detecting a ceiling based on whether a power amplitude of the reflections is greater than or equal to a threshold value;
operating the electronic device in an outdoor mode if the power amplitude of the reflections is not greater than or equal to the threshold value; and
operating the electronic device in an indoor mode if the power amplitude of the reflections is greater than or equal to the threshold value.
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