In order to accomplish the software-defined micro-nano satellite demands, which includes that its payload functions and parameters could be reconstructive and controllable by uploading software as needs, we have to break through the design limitations between traditional satellite platform and ordin...

Intelligent satellite technology requires more and more data mining operations for satellite time series data. Usually, satellite data amount is very big that needs a lot of computation, so it will take a very long time to complete the computation in serial program. The satellite anomaly process mul...

The hyperspectral (HS) remote sensing image which contains abundant spectral information generally has low spatial resolution. While the panchromatic (PAN) remote sensing image has high spatial resolution. In order to fuse the HS and PAN remote sensing images, a new fusion algorithm based on edge-pr...

The analog complex correlator used in aperture synthesis radiometers is easy to be affected by many complicated factors, for example ambient temperature, signal crosstalk and so on. These factors result in correlator offset value change with time, which will significantly impact the performance of a...

Phased array receiver can steer antenna beam direction electronically by changing the phase of the units. Initial phase calibration of phased array is the precondition of steering antenna beam direction. In this paper, a coherent phase-shift measurement method is presented based on phase-shift measu...

The traditional satellite network usually concentrates the control layer and data layer in the same network device, which leads to more complex network structure, fixed bandwidth and poor resource utilization rate. The software-defined satellite network (SDSN) architecture can effectively manage the...

Recently, moving object detection in large-scale remote sensing images achieves outstanding performance by fully convolutional neural network. However, handling such data is very time-consuming because the search space is extremely large. This paper proposes a specific improved method from the point...

In order to solve the defect within traditional airspeed measurement method adopted by helicopter air data system, this paper presents a scheme of airspeed measurement system based on optical and a rapid inversion method of airspeed vector with other airdata. An optical airspeed measurement system i...

Aimed at inversion of target motion characteristics under single platform observation conditions, the model and method for reconstructing target spatial position and estimating motion parameters based on sequence images are proposed. To suppress the effect of atmospheric refraction on the accuracy o...

Considering the influence of complex indoor environment and multi-path effects on the WiFi fingerprint positioning performance, this paper extracts channel state information (CSI) from the Intel 5300 wireless network card and utilizes the modified CSI amplitude and phase information as fingerprint f...

The layout of ground-based augmentation system (GBAS) reference stations will directly impact the accuracy and integrity performance of GBAS, and it is closely related to the airport conditions, the satellite constellations used and the local ionospheric environment. However, the published documents...

Hyperspectral images bring abundant spectral information, but their large size and high dimensionality also lead to huge calculation. Therefore, it is particularly urgent to develop a high-speed processing scheme for anomaly target detection algorithms. Considering that the field programmable gate a...

In order to reduce the application cost of polarization sensitive array (PSA), optimize the utilization efficiency of polarization information and improve the filtering performance under the condition of steering vector mismatch, an auxiliary polarization sensitive array (APSA) model and a beamformi...

Software defined satellite networks (SDSN) provides an innovative perspective to manage satellite networks through decoupling the data and control planes to achieve logically centralized network states and controls. In SDSN, control messages and data packets are simultaneously transmitted in the net...

The attitude update rate is one of the most important performance indexes of the star sensor. With the application of the large array image detector, the processing speed of the traditional star extraction method has become the main bottleneck of the update rate. Given that, a multichannel fast star...

The interaction of the lasers with the alkali metal atoms and inert atoms in the cell is used to maintain nucleon precessional motion in Larmor frequency, the magnetic field-driven technique is used to achieve closed-loop control of air chamber magnetic field, the resonance state of nucleon is kept ...

In order to realize the robust control of an electronic throttle body (ETB) system equipped with 5.7 L gasoline engine, the nonlinear inverse model of the ETB system must be established to counteract the effect of dynamic hysteresis nonlinearity on the control performance of the system. In this pape...

In order to analyze the influence of initial positions on the launch window in space fly-by problem efficiently, the process of space fly-by was studied firstly in this paper. Then, a numerical method to calculate the launch window under different initial conditions was proposed. For improving calcu...

In view of the growing space debris pollution of space environment, the deorbit model of space-based laser removal of space debris is established. In this model, the effect of the angle between the speed increment and the space debris velocity on the height reduction of perigee is emphatically analy...

The empirical atmospheric model would cause great error in orbital prediction. This paper, taking a typical satellite as the benchmark spacecraft, proposes two orbital prediction models with different precision to generate training data and test data. Using three supervised classification methods in...

In this paper, a software system is designed and implemented, which uses space-based observation sequence to reconstruct the 3D non-cooperative target based on the thought of software defined satellites. Considering the interaction between the satellite and the ground users, the system consists of t...

On-orbit service is one of the main developing trends of future satellites, where on-orbit software reconfiguration and hardware assembly are the key technologies. In this paper, combined with the electromagnetic technology and "pen cap" docking mechanism, an autonomous rendezvous and docking contro...

Deep reinforcement learning (DRL) technique is a new kind of machine learning based control algorithm, which shows its outstanding performance in the area of robotics and unmanned aerial vehicle. Meanwhile, in the area of satellite attitude control, traditional PID control algorithm is still widely ...

In order to improve the adaptability of the bionic adhesive device to target motion parameters when capturing non-cooperative objects in space, a 3-degree-of-freedom series compliant joint is designed. When the joints are embedded in the system, the device can passively adapt to the moving object po...