Patent ID: 9535153
Date: 2017-01-03
CPC Classifications: G01S

Claim:
1. A location anchor comprising: a transceiver; a programmable processor; executable control software stored on a non-transitory computer readable medium; a plurality of directional transmitters or a plurality of directional receivers of electromagnetic radiation; and a pressure sensor, wherein the plurality of directional transmitters or the plurality of directional receivers are positioned about a perimeter of the location anchor, wherein the directional transmitters are configured to transmit first signals to an object at a plurality of identifiable angles or the plurality of directional receivers are configured to receive second signals from the object at a plurality of identifiable angles, wherein, based on the first signals or based on the second signals, a location engine is configured to determine an angular orientation of the object with respect to the location anchor, wherein the transceiver is configured to transmit a signal that includes information related to a reading from the pressure sensor to a location engine, and wherein, based on the signal that includes the information related to the reading from the pressure sensor, the location engine is configured to: determine a differential pressure between the pressure sensor and a second pressure sensor in the object, and, based on the differential pressure, the location engine is further configured to estimate an altitude of the object.