An aircraft monitoring system for mounting on-board an aircraft, comprising: a plurality of wireless aircraft sensors (102a-d) mountable on-board an aircraft, each wireless aircraft sensor (102a-d) configured to sense an aircraft parameter; a data acquisition system mountable on-board the aircraft and connected to the plurality of wireless aircraft sensors (102a-d); and characterised by: a plurality of meta sensors (104a-d) mountable on-board the aircraft, and connected to the data acquisition system, each meta sensor associated with a respective wireless aircraft sensor (102a-d), each meta sensor (104a-d) configured to determine a location or orientation on the aircraft of the respective wireless aircraft sensor (102a-d) with which each meta sensor (104a-d) is associated; the data acquisition system comprising a computer-readable medium storing instructions executable by one or more processors to perform operations comprising: receiving (302, 304) the aircraft parameter(s) that each wireless aircraft sensor (102a-d) is configured to sense, a configuration information for each wireless aircraft sensor (102a-d), and the determined location or orientation on the aircraft of each wireless aircraft sensor (102a-d) with which each meta sensor is associated, identifying (308, 312) one or more aircraft monitoring operations that the aircraft monitoring system can perform using the received configuration information and the received locations or orientations on the aircraft, performing the identified aircraft monitoring operations based, in part, on the received aircraft parameters sensed by one or more of the plurality of wireless aircraft sensors (102a-d) and on the received location or orientation of the one or more of the plurality of wireless aircraft sensors (102a-d) determined by respective one or more of the meta sensors (104a-d); and wherein each meta sensor (104a-d) is not located with the respective wireless aircraft sensor (102a-d). a plurality of wireless aircraft sensors (102a-d) mountable on-board an aircraft, each wireless aircraft sensor (102a-d) configured to sense an aircraft parameter; a data acquisition system mountable on-board the aircraft and connected to the plurality of wireless aircraft sensors (102a-d); and characterised by: a plurality of meta sensors (104a-d) mountable on-board the aircraft, and connected to the data acquisition system, each meta sensor associated with a respective wireless aircraft sensor (102a-d), each meta sensor (104a-d) configured to determine a location or orientation on the aircraft of the respective wireless aircraft sensor (102a-d) with which each meta sensor (104a-d) is associated; the data acquisition system comprising a computer-readable medium storing instructions executable by one or more processors to perform operations comprising: receiving (302, 304) the aircraft parameter(s) that each wireless aircraft sensor (102a-d) is configured to sense, a configuration information for each wireless aircraft sensor (102a-d), and the determined location or orientation on the aircraft of each wireless aircraft sensor (102a-d) with which each meta sensor is associated, identifying (308, 312) one or more aircraft monitoring operations that the aircraft monitoring system can perform using the received configuration information and the received locations or orientations on the aircraft, performing the identified aircraft monitoring operations based, in part, on the received aircraft parameters sensed by one or more of the plurality of wireless aircraft sensors (102a-d) and on the received location or orientation of the one or more of the plurality of wireless aircraft sensors (102a-d) determined by respective one or more of the meta sensors (104a-d); and receiving (302, 304) the aircraft parameter(s) that each wireless aircraft sensor (102a-d) is configured to sense, a configuration information for each wireless aircraft sensor (102a-d), and the determined location or orientation on the aircraft of each wireless aircraft sensor (102a-d) with which each meta sensor is associated, identifying (308, 312) one or more aircraft monitoring operations that the aircraft monitoring system can perform using the received configuration information and the received locations or orientations on the aircraft, performing the identified aircraft monitoring operations based, in part, on the received aircraft parameters sensed by one or more of the plurality of wireless aircraft sensors (102a-d) and on the received location or orientation of the one or more of the plurality of wireless aircraft sensors (102a-d) determined by respective one or more of the meta sensors (104a-d); wherein each meta sensor (104a-d) is not located with the respective wireless aircraft sensor (102a-d).