Therefore the airborne data transmitting bus are one of the key technologies of the avionics integrated system. In the design of the avionics integrated system, the performance of the airborne data transmitting bus played an indispensable role.

In addition, because the airborne data base is stored in flash memory that is inviolate and random access, the speed of data retrieval and access is improved and the airborne data is reliable.

The contents include a distributed system architecture for airborne data acquisition,an open bus structure in data acquisition unit,the synchronous sampling of signals,digital signal processing,full software programming and automatic test,etc.

Analysis of airborne antenna using a FEM-UTD hybrid method

In this paper, the near-field vector components were used to combine the FEM method and the uniform-geometrical theory of diffraction (UTD) method for analyzing phased array antenna mounted on an airborne platform.

DBS imaging and GMTI in a wideband airborne mechanic scanning radar

By compensating the range migration in wideband airborne mechanic scanning radar, the proposed DBS imaging algorithm can efficiently improve the resolution of a DBS image.

The radome, which is often used to house airborne scanning radar antennas, causes a large boresight error and boresight error slope of the radar antenna.

In this paper, the near-field vector components were used to combine the FEM method and the uniform-geometrical theory of diffraction (UTD) method for analyzing phased array antenna mounted on an airborne platform.

Development of an airborne SAR real-time digital imaging processor

An airborne SAR real-time digital imaging processor is presented, and its real-time digital imaging principle and main technical parameters are analyzed briefly.

Field detection of chlorophyll-a concentration in the sea surface layer by an airborne oceanographic lidar

An airborne oceanographic lidar, with a frequency-tripled Q-switched Nd: YAG laser of 355 nm, has been designed to measure chlorophyll-a (Chl-a) concentration in the sea surface layer by the Ocean Remote Sensing Institute, OUC.

The results of an analysis of velocity fluctuations in the plasma sheet of the Earth's magnetotail measured onboard INTERBALL Tail Probe satellite are presented.

The determination was carried out using the data of onboard measurements of the Earth's magnetic field intensity.

The onboard air compressor, gyrodynes, and the crew activity are among these sources.

Some Features of Vibrational Perturbations onboard the MirOrbital Station

A number of scientific and technical experiments were carried out and are still being carried out onboard the Mirorbital station in various fields: physics of fluids, space materials study, astrophysics, biotechnology, and so on.

These coefficients are recalibrated by minimizing the difference between airborne data and upward continued surface data (external calibration) and by minimizing the errors at line crossings (internal calibration) respectively.

The methodology is based on fusing a variety of satellite-based image types (optical, thermal, microwave) together with airborne data (optical and thermal infrared) and ancillary data sources such as geological and topographic maps.

It results in a fast and efficient algorithm which can be used worldwide (with the exception of the polar regions) for the reduction of airborne data used for geoid determination.

Airborne data, obtained by COLD during research campaigns in Australia and Brazil in the frame of international projects, are also presented to demonstrate COLD in-flight performance.

Effects of Airborne Data Link Communication on Demands, Workload and Situation Awareness

This paper sums up the investigation on application of the monopulse technique to airborne radar.Some typical airborne monopulse radar systems are discussed, and by taking the amplitude-comparison monopulse technique for an example, some cruxes in the monopulse technique are investigated and the data ensuring the performances of the system are given. The application of the monopulse technique to the angle-measurement and tracking in airborne radar are also described.The factors which influence the accuracy of...

This paper sums up the investigation on application of the monopulse technique to airborne radar.Some typical airborne monopulse radar systems are discussed, and by taking the amplitude-comparison monopulse technique for an example, some cruxes in the monopulse technique are investigated and the data ensuring the performances of the system are given. The application of the monopulse technique to the angle-measurement and tracking in airborne radar are also described.The factors which influence the accuracy of the angle-measurement and tracking are pointed out and the performance of ECCM of the monopulse airborne radar is analyzed.Furthermore several particular applications of the monopulse technique to multifunction airborne radars, such as air-to-ground ranging, the improvement in angle resolution, terrain avoidance and following, etc. are discussed.Finally, it is pointed out that the main purposes in the application of the monopulse technique to airborne radar are to improve the performance of ECCM and to realize the multifunction of airborne radar by use of the signals in sum and difference beams.

In this paper,a filtering theory is applied to the multiple closed-loop feedback system for tracking a single target in range,velocity,azimuth and elevation in an airborne radar.First of all,according to relative motion between.arget and antenna,the vector differential equation of the states used to control the four tracking loop is established.Then,the corresponding nonlinear filtering algorithm is derived.Finally,the results of computer simulation are given.The results of computer simulation show that in a...

In this paper,a filtering theory is applied to the multiple closed-loop feedback system for tracking a single target in range,velocity,azimuth and elevation in an airborne radar.First of all,according to relative motion between.arget and antenna,the vector differential equation of the states used to control the four tracking loop is established.Then,the corresponding nonlinear filtering algorithm is derived.Finally,the results of computer simulation are given.The results of computer simulation show that in a wide range the time varying system using Kalman filter can keep better performance than the ordinary one without optimal filter.The system involving nonlinear filtering has a performance closed to the linear filtering one in steady-state response,but the former achieves performance improvement in transient response and in large error.Using Kalman filter,the tracking loops are coupled each other,and its performance is better than that of seperate loops.Finally,we show that a particular merit of this mathematical model,established in aim coordinate system,is less sensitive to target's manoeuvre.Therefore,the system performance is almost as good as an adoptive estimator,but which is sensitive to measurement noise.As the signal to noise ratio of radar varies in a wide range,we should take adaptive method in measuring noise.The technique used and results obtained are also available for ground radar,shipborne radar and other tracking systems,either active or passive.

This paper presents a schematic system circuit diagram, manipulated by a microprocessor, for illustrating. The logic relations between the remote-controlled and sequence-controlled variables in the control system of a certain pilotless aircraft. Discussion is also made of interface circuits and system software design.The work is an attempt made to replace some airborne devices with a microprocessor.With substantial modification to the logic relations, the system software is designed to give a higher flging quality...

This paper presents a schematic system circuit diagram, manipulated by a microprocessor, for illustrating. The logic relations between the remote-controlled and sequence-controlled variables in the control system of a certain pilotless aircraft. Discussion is also made of interface circuits and system software design.The work is an attempt made to replace some airborne devices with a microprocessor.With substantial modification to the logic relations, the system software is designed to give a higher flging quality and reliability and make the commanding and guideing operations more convenient for navigators on the ground.