5 results about "Magnetosphere" patented technology

A method for monitoring precipitation of magnetospheric particles includes detecting charged magnetospheric particles by a particles detector, processing the detection data to associate a respective estimate or measurement of kinetic energy with the detected magnetospheric particles, obtaining a first count value NH associated with a relatively higher estimate or measurement of kinetic energy, obtaining a second count value NL associated with a relatively lower estimate or measurement of kinetic energy, detecting a relative variation of the second count value NL with respect to the first count value NH, determining that an impulsive event of precipitation of charged magnetospheric particles (MPP event) in the magnetosphere occurred, assigning to the MPP event geomagnetic longitude and time, defining one or more groups of MPP events occurred in a time range at a same geomagnetic longitude, and identifying a group of MPP events indicative of an activity of terrestrial origin.

The invention discloses a spinning terahertz nano oscillator and a chiral regulation and control method thereof. The method comprises the following steps: under the action of a femtosecond laser chiral electric field, inducing an antiferromagnetic layer of a spin terahertz nano oscillator to generate a light-spin orbital moment; the optical-spin orbit moment drives the oscillation of the antiferromagnetic magnetic moment to form spin polarization, and the polarized spin current is converted into a charge current and is radiated to obtain a terahertz signal of the antiferromagnetic frequency related to chirality. The circular polarization femtosecond laser is used for exciting generation of out-of-plane polarization spin in antiferromagnetic metal, radiation of antiferromagnetic terahertz nano oscillation electromagnetic waves is achieved, and the spin terahertz nano oscillation radiation source has the advantages of being fast in response, easy to prepare and capable of working at the room temperature.

A method (100) for monitoring particle deposition in the magnetosphere comprises the steps of: detecting (101) charged magnetospheric particles by means of at least one particle detector (10) installed on at least one satellite vehicle (1) in orbit (3), associating the detected particles with respective detection data; processing (102) the detection data to associate respective kinetic energy estimates or kinetic energy measurements with the detected magnetospheric particles; obtaining a first count value N H (104) relating to the number of charged particles detected over a time period, the first count value being associated with relatively higher kinetic energy estimates or kinetic energy measurements comprised in a first energy range; obtaining a second count value N L (105) relating to the number of charged particles detected over said time period, the second count value N L being associated with relatively lower kinetic energy estimates or kinetic energy measurements comprised in a second energy range; detecting (106) a relative variation value of the second count value N L with respect to the first count value N H ; determining (107) that a pulse event of particle deposition in the magnetosphere - MPP event - has occurred over the aforementioned time period, comparing the aforementioned variation value with a threshold value; assigning (109) to said MPP event the geomagnetic longitude and time at which said MPP event occurred; defining (110) one or more groups of MPP events, each group comprising MPP events occurring over a time range, at the same geomagnetic longitude or at relatively close geomagnetic longitudes; identifying (111) a group of MPP events as indicative of a surface-originated activity, such as a pre-seismic activity or a seismic activity, based on the number of MPP events comprised in the group and / or based on the associated variation value found in the detection step (106).

The application discloses a method for classifying and analyzing super low frequency electromagnetic disturbance at middle and low latitudes based on satellite observation, which comprises the following steps: obtaining electric field component disturbance values and electron density relative change values through feature processing, constructing a classification feature set, inputting in-situ observation data into a disturbance existence determination model to obtain significant disturbance data, calculating cross-covariance and multivariate mutual information between the significant disturbance data, performing multistage disturbance classification to obtain disturbance results and calculate disturbance indexes, constructing a disturbance factor gradient boosting regression model, and inputting in-situ observation data to be processed into the disturbance factor gradient boosting regression model to obtain disturbance prediction indexes and disturbance influencing factors. The method can efficiently and accurately extract and classify super low frequency electromagnetic disturbance at middle and low latitudes, and can also perform disturbance prediction and quantitative attribution of influencing factors, which has important significance for deepening the research on the dynamic mechanism of the magnetosphere-ionosphere coupling process and improving the space environment monitoring capability.

This invention relates to the field of simulation computing, and in particular to a simulation analysis method, system, device, and medium for optical imaging of the Earth's magnetosphere. The method includes: reading geomagnetic plasma data in a preset format; determining the type of geomagnetic radiation simulation based on at least one plasma parameter type input by the user; and performing radiation simulation calculations using the geomagnetic plasma data according to the type of geomagnetic radiation simulation, thereby obtaining and visualizing an optical image of the geomagnetic space. By accurately simulating optical imaging of radiation at different wavelengths in the geomagnetic space, long-term observation of the same geomagnetic region can be performed, resulting in a geomagnetic optical image with a large field of view and fast response time. It can dynamically display the temporal and spatial morphological changes of the geomagnetic plasma layer, thus facilitating the study and analysis of the global matter and energy transport characteristics of the geomagnetic space.