receiving, via an ultra-wide band communication transceiver, ultra-wide band RF signals containing locations of each of at least three anchors;

determining, via a processor, ranging information of each of at least three anchors by transmitting and receiving ultra-wideband communication messages via the ultra-wide band communication transceiver and determining an associated transmission time of flight between the tag/processor device and the at least three anchors;

determining a distance between the tag/processor device and the at least three anchors from the determined ranging information;

determining an altitude of the tag/processor device based on temperature and pressure data;

determining the tag/processor device location estimate based on the locations and ranging information of the at least three anchors;

wherein determining the location estimate further comprises Kalman filtering, in a first plurality of Kalman filters, coordinate calculations to statistically determine probable location information having a first degree of resolution;

receiving linear acceleration information from at least one MEMs device;

kalman filtering the linear acceleration information; and

adaptive low-pass filtering the probable location produced by the first plurality of Kalman filters and the Kalman filtered linear acceleration information to obtain probable location information with a second degree of resolution that is more precise than the first degree of resolution.