Abstract: A combined stand-by instrument intended to be fitted to the instrument panel of an aircraft, and a method for calibrating the combined stand-by instrument, comprises anemobarometric sensors, inertial sensors, a magnetic field sensor, a screen and a computer making it possible to determine and to display on the screen an altitude, a speed, an attitude and a current heading of the aircraft on the basis of the sensors and to calibrate the magnetic field sensor. The computer is configured to allow the simultaneous display on the screen of the altitude, of the speed and of the attitude of the aircraft as well as a guide for the calibration of the magnetic field sensor.

Abstract: The invention relates to a system for estimating flight parameters of an aircraft, having a plurality of static pressure ports and a plurality of measuring probes, each measuring probe having an aerial portion and an electronic device configured to estimate the flight parameters. A first and second measuring probe have identical aerial portions and identical electronic devices, a third measuring probe has an aerial portion and an electronic device that are different from those of the first measuring probe; the electronic devices of the first, second and third measuring probes and the static pressure ports are connected so as to form a first, second and a third data system respectively associated with a static pressure port, and each static pressure port of each of the data systems is separate from each static pressure port of the other data systems.

Abstract: A combined stand-by instrument intended to be fitted to the instrument panel of an aircraft, and a method for calibrating the combined stand-by instrument, comprises anemobarometric sensors, inertial sensors, a magnetic field sensor, a screen and a computer making it possible to determine and to display on the screen an altitude, a speed, an attitude and a current heading of the aircraft on the basis of the sensors and to calibrate the magnetic field sensor. The computer is configured to allow the simultaneous display on the screen of the altitude, of the speed and of the attitude of the aircraft as well as a guide for the calibration of the magnetic field sensor.

Abstract: A device is provided for backing up calibration information for an air navigation instrument intended to be installed in an aircraft, the air navigation instrument comprising a first connector intended to be connected to a second connector belonging to the aircraft. The invention also relates to an aircraft instrument panel including the device. According to the invention, the backup device is connected between the first and the second connectors. The device comprises a third connector similar to the first connector and connected to the second connector and a fourth connector similar to the second connector and connected to the first connector. All the links from the second connector pass through the device to the fourth connector with no electrical interaction with the device. The device comprises backup means, connected only to the air navigation instrument, by means of the first and fourth connectors.

Abstract: The invention relates to the instruments for aiding the piloting of aircraft and more precisely a system comprising two instruments (ICS1, ICS2) making it possible to display flight parameters and notably the attitude of the aircraft. Each instrument comprises an inertial measurement unit (121, 122). The invention makes it possible to align the inertial measurement units (121, 122) in a stand-alone manner even when the aircraft is in motion. The alignment can be carried out without using an external source of information. Accordingly, the alignment is carried out mutually for the two inertial measurement units (121, 122) based on a relative position of each instrument (ICS1, ICS2) and on measurements (?1, ?2, ?1, ?2) taken by each instrument (ICS1, ICS2) during one and the same time period.

Abstract: The invention relates to a method for managing data intended to be written to and read from a memory of FLASHPROM type organized into pages. Several data are stored per page and the method consists: for each page, in reserving an area intended to receive the status and the number of the page, for each data item, in reserving an area for the status and the size of the data item. Moreover, at least one page allowing the defragmentation of the memory is reserved.