GNSS-IR soil humidity inversion method and system

The invention provides a GNSS-IR soil humidity inversion method and system, and belongs to the technical field of soil humidity data monitoring, and the method comprises the steps: collecting a DSNR sequence of a target rugged topography; performing space clipping on the DSNR sequence by using preset topographic data and a preset height difference threshold to obtain an initial clipping DSNR sequence; constructing a reference cosine waveform, and performing time clipping on the initial clipping DSNR sequence based on the reference cosine waveform to obtain a deep clipping DSNR sequence; and inputting the depth clipping DSNR sequence into a preset standard soil humidity inversion model to obtain the soil humidity of the target rugged topography. According to the method, the DSNR sequence in the GNSS observation data is cut, and available data on the rugged topography is reserved to the maximum extent, so that the influence of the topography on the DSNR data quality is reduced, and the purpose ...

Method and device for generating centimeter-level oblique ionosphere delay product

The invention relates to a centimeter-level oblique ionosphere delay product generation method and device. The method comprises the following steps: extracting centimeter-level oblique ionosphere delay information by using a non-combined PPP technology; constructing a slant ionosphere delay model from the base station to the satellite based on a second-order polynomial function of the elevation angle and the azimuth angle; and interpolating the residual error of the oblique ionosphere delay model to a grid point to obtain the centimeter-level oblique ionosphere delay product. The precision loss caused by ionosphere thin layer hypothesis and projection function errors can be avoided, so that the precision of ionosphere delay information is improved.

Bottom atmosphere and ionized layer coupling anomaly detection system and method

The invention provides a bottom atmosphere and ionized layer coupling anomaly detection system and method. The method is mainly used for detecting the small-scale response of the ionized layer to the underlying atmosphere. The method comprises the following steps of: selecting a calm historical moment, acquiring an ionized layer related electron content sequence by using a GNSS (Global Navigation Satellite System) means, applying an acquired abnormal propagation speed to grid search of a disturbance trigger source by using a first abnormal starting time and a corresponding ionized layer puncture point coordinate to obtain a trigger source position of ionized layer disturbance, and constructing a full-connection deep neural network. And sending the abnormal propagation speed, the abnormal trigger source position information and the weather type of the real-time atmospheric abnormal event to a user terminal for real-time early warning.

Water vapor data calibration and optimization method combining spherical crown harmonic model and neural network

The invention discloses a water vapor data calibration and optimization method combining a spherical crown harmonic model and a neural network. The method comprises the following steps of: 1, keeping PWV data from different sources consistent in time; 2, performing preliminary calibration and optimization on PWV data by using a spherical crown harmonic model; 3, outputting an intermediate PWV for preliminary calibration by using the spherical crown harmonic model, and forming a sample with the longitude and latitude, the elevation and the time; 4, constructing a neural network model architecture for depth calibration; 5, training and testing the neural network model and the precision evaluation information thereof; and 6, calibrating and optimizing the low-precision PWV by using the trained spherical crown harmonic model and neural network model, and outputting the optimized PWV. According to the method, the problems that local deviation is difficult to correct and a neural network model ...

Multi-variant united-row composite substrate, frequency device group and manufacturing method thereof

The invention relates to a substrate used for packaging a piece-type frequency device and a manufacturing method thereof. A multi-variant united-row composite substrate comprises a composite substrate with m*n concave pits; frequency pieces of the frequency device are placed in the concave pits; the composite substrate is formed by compositing an upper substrate and a lower substrate; the upper substrate is a porous substrate which is provided with m rows*n lines through holes in rectangular arrangement, wherein m is greater than 1 and n is greater than or equal to 1; the lower substrate is formed by horizontally bonding n rows of base strips with m depressions; one surface, provided with the depressions, of each row of the base strip is an inside surface and is provided with an inner electrode; the other surface is an outside surface and is provided with an outer electrode which is connected with the inner electrode; and the length of each depression is less than that of each frequency ...

Information extrapolation method and device based on neural network, equipment and storage medium

The invention discloses an information extrapolation method and device based on a neural network, equipment and a storage medium, and the method comprises the steps: obtaining an atmosphere information historical sequence, and supplementing the missing time point data in the atmosphere information historical sequence through employing a K proximity algorithm; performing variance weight determination on the supplemented sequence to obtain variance data, inputting the variance data into a preset neural network model for training to obtain a training result, and broadcasting the training result; the method comprises the following steps: acquiring historical meteorological information, combining the historical meteorological information with target data received by broadcasting to obtain historical forecast information, inputting the historical forecast information into a preset neural network model to obtain output information, and extrapolating the output information, thereby greatly improving ...

Manufacturing method of ceramic packaged sheet type quartz crystal frequency device

The invention relates to a ceramic packaged sheet type quartz crystal frequency device and a manufacturing method thereof. The frequency device comprises an upper cover plate, a lower cover plate and a wafer, wherein the wafer is positioned in a concave pit of the lower cover plate, the length and width of the concave pit of the lower cover plate are greater than the length and width of the wafer, and the depth of the concave pit of the lower cover plate is greater than the thickness of the wafer; and the frequency device also comprises an inner electrode and an outer electrode. The manufacturing method comprises the following steps: firstly, manufacturing a lower ceramic cover plate with m*n array concave pits; secondly, dispensing conductive glue in the concave pits of the lower cover plate, bonding one end of the quartz wafer and the conductive glue and then fully dropping the quartz wafer in the concave pit of the lower cover plate, and bonding the wafers and the upper cover plateafter ...

Self-adaptive satellite selection method, device and equipment and readable storage medium

The invention relates to a self-adaptive satellite selection method, device and equipment and a readable storage medium, differential data sent by a monitoring station and a reference station is decoded, carrier/pseudo-range observation data and navigation message information of each target satellite are obtained, and a double-difference combination observation value equation is constructed; performing filtering and parameter fixing on the double-difference combination observation value equation to obtain fixed values of two parameters of ambiguity and coordinates; according to the fixed values of the ambiguity and coordinate parameters and a double-difference combination observation value equation, constructing a post-test residual vector; eliminating a target satellite with a problem based on a Pauta criterion and a post-test residual vector; performing iterative filtering solution on a double-difference observation equation constructed after different combinations are performed on the ...

Beidou No.3 PPP service real-time satellite clock error evaluation method and system

The invention relates to a Beidou No.3 PPP service real-time satellite clock error evaluation method and system, and relates to the technical field of satellite high-precision positioning, and the method comprises the steps: selecting a first satellite in a real-time satellite clock error correction number combination corresponding to each epoch as a reference satellite; and obtaining a full-time double-difference satellite clock difference time sequence through a double-difference algorithm of an unfixed reference satellite. Subtracting the double-difference satellite clock differences of two adjacent epochs before and after the same satellite to obtain the three-difference satellite clock difference of the next epoch, counting the average value of the three-difference satellite clock differences of all satellites of the next epoch, and subtracting the double-difference satellite clock difference of the next epoch from the average value when the average value exceeds a preset threshold ...

Grid correction generation method and device based on user distribution, equipment and storage medium

The invention discloses a grid correction generation method and device based on user distribution, equipment and a storage medium. The method comprises the following steps: constructing an initial grid epochwise through a neural network algorithm; dynamically adjusting the initial grid through user real-time distribution data to obtain an epoch final grid; and substituting the epoch final grid into a network RTK resolving model to obtain differential data, so that the number of system service grids is always kept in dynamic balance without being limited by the number of VRS data services, the massive concurrent demand is met, the regional service precision is improved, the user precision is improved, resource waste is avoided, idle grids can be automatically released, and the user experience is improved. On the basis of guaranteeing massive concurrent services, global self-adaptive high-precision data service is realized, and the speed and efficiency of correction generation based on the ...

Complete cycle ambiguity parallel filtering resolving method, device, equipment and storage medium

The invention relates to an integer ambiguity parallel filtering resolving method and device, equipment and a storage medium. The method comprises the steps that reference satellites are screened out from a BDS system and a GPS system based on a preset satellite selection rule; parallelly fixing the double-difference ambiguity of the observation value combination of the BDS satellites and the GPS satellites according to the long-to-long sequence of the wavelengths based on the reference satellites, and fixing the base line according to the short-to-long sequence; performing normal equation updating according to a fixed result to obtain an ambiguity parameter solution; and solving the fixed integer ambiguity based on the ambiguity parameter. According to the method, the satellite which is easy to fix is firstly fixed, and then ambiguity search is carried out on the other satellites, so that the parallel filtering efficiency is improved, and the integer ambiguity resolving efficiency is improved ...

Non-difference RTK error correction number determination method and device, equipment and storage medium

The invention relates to a non-difference RTK error correction number determination method and device, equipment and a storage medium, and the method comprises the steps: classifying errors broadcasted by a network RTK during non-difference correction, and obtaining an ionized layer correlation error, a troposphere correlation error, and other errors except the ionized layer correlation error and the troposphere correlation error; constructing a Delaunau triangulation network based on the continuous operation reference station, and screening a triangle containing a monitoring station from the Delaunau triangulation network as an interpolation area; and respectively carrying out interpolation processing on the ionosphere correlation error, the troposphere correlation error and other errors in the interpolation region to obtain an ionosphere correction number, a troposphere correction number and other error correction numbers. According to the method, the errors broadcasted by the network ...

Vibration ceramic resonance of independent flake thickness-changing and its production

The ceramic resonator comprises: a cover plate, an intermediate splint, a backboard and a piezoelectric ceramic. The manufacturing method comprises: 1) according to the requirement of product, making the cover plate, backboard and intermediate plate; 2) after binding the cover plate with the intermediate splint on the worktable by using dedicated sticking, the piezoelectric ceramic vibrator is placed in the hole of the intermediate splint, then it is putted on the dedicated sticking worktable to bind with the backboard; after heating, forming a laminate sheet; 3) according to the size requirement of the product, the laminate sheet is cut into the product units; 4) the product units are putted into the dedicated evaporation clamper to make evaporation of end-face electrode in order to make the electrode of piezoelectric ceramic on-state to the external electrode.

RTK data service method and device, electronic equipment and storage medium

The invention relates to an RTK data service method and device, electronic equipment and a storage medium, and relates to the technical field of network RTK resolving services, and the method comprises the following steps: a data processing server obtains a compliance observation data stream measured and calculated by a reference station for a target area based on a first one-way optical shutter; obtaining a gridding differential correction number set based on the compliance observation data stream; and based on the second one-way optical shutter, sending the gridding differential correction number set corresponding to the target area to a data forwarding server, so that the data forwarding server obtains the gridding differential correction number corresponding to the approximate position of the moving station based on the approximate position of the moving station sent by the moving station. According to the method, the observation data stream of the base station is acquired by using ...

Ceramic packaged sheet type quartz crystal frequency device and manufacturing method thereof

The invention relates to a ceramic packaged sheet type quartz crystal frequency device and a manufacturing method thereof. The frequency device comprises an upper cover plate, a lower cover plate and a wafer, wherein the wafer is positioned in a concave pit of the lower cover plate, the length and width of the concave pit of the lower cover plate are greater than the length and width of the wafer, and the depth of the concave pit of the lower cover plate is greater than the thickness of the wafer; and the frequency device also comprises an inner electrode and an outer electrode. The manufacturing method comprises the following steps: firstly, manufacturing a lower ceramic cover plate with m*n array concave pits; secondly, dispensing conductive glue in the concave pits of the lower cover plate, bonding one end of the quartz wafer and the conductive glue and then fully dropping the quartz wafer in the concave pit of the lower cover plate, and bonding the wafers and the upper cover plate after ...

片式陶瓷频率器件的振动腔的制备方法及专用贴片工作台

This invention discloses a preparation method for an oscillating cavity of a sheet piezoelectric ceramic frequency device and a specific sheeting stand characterizing in taking sticking paper as the mask of a ceramic board and forming pits on it by sand to avoid influence to the pit accuracy due to the uneven contraction in the process of the ceramic board sintering. The preparation is carried out on a special working stand to ensure the accuracy of the pits and the bind accuracy of the ceramic board and piezoelectric vibrator ensures the accuracy of the oscillating cavity.

Shear vibration ceramic resonance of independent flake thickness and its production

Ionized layer total electron content prediction system and method of additional restraint station

The invention provides an ionosphere total electron content prediction system and method of an additional restraint station. The server calculates to obtain a corrected sun index and a geomagnetic index, constructs sun index and geomagnetic index samples, marks corresponding total electronic content labels, and inputs the total electronic content labels into a back propagation neural network for training to obtain a prediction model; the total electron content of the four observation stations at multiple acquisition moments is obtained, and the total electron content of the prediction point at each moment is obtained through inverse distance weighted interpolation. Constructing sun and geomagnetic index samples at the current moment and the previous moment, and obtaining the predicted total electron content at the current moment and the previous moment through a neural network; and correcting the predicted total electron content. And calculating the corrected total electron content difference ...