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A GWAC Light Curve Anomaly Detection Method Based on Grubbs Criterion and ARIMA

A technology of light curve and anomaly detection, applied in image analysis, instrument, calculation, etc., to achieve the effect of ensuring accuracy, rapid response and high accuracy

Active Publication Date: 2019-10-18
BEIJING UNIV OF TECH
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Problems solved by technology

[0006] In view of the above deficiencies in the prior art, the present invention provides a GWAC light curve anomaly detection method based on the Grubbs criterion and ARIMA to solve the problem of abnormal brightness detection in the GWAC light curve analysis

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  • A GWAC Light Curve Anomaly Detection Method Based on Grubbs Criterion and ARIMA
  • A GWAC Light Curve Anomaly Detection Method Based on Grubbs Criterion and ARIMA
  • A GWAC Light Curve Anomaly Detection Method Based on Grubbs Criterion and ARIMA

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Embodiment Construction

[0036] Features and exemplary embodiments of various aspects of the invention will be described in detail below. The following description covers numerous specific details in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a clearer understanding of the present invention by showing examples of the present invention. The present invention is by no means limited to any specific configuration and algorithm presented below, but covers any modification, replacement and improvement of related elements, components and algorithms without departing from the spirit of the present invention.

[0037] The specific steps of a GWAC light curve anomaly detection method based on Grubbs criterion and ARIMA according to an embodiment of the present invention will be describ...

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Abstract

The invention discloses a GWAC (Ground-based Wide-Angle Camera array) light curve anomaly detection method based on a Grubbs criterion and ARIMA, which comprises steps: the Grubbs criterion is used to filter the GWAC light curve, and doubtful values are selected; the doubtful values selected through the Grubbs criterion are subjected to stability test, unstable data are subjected to differential to become a stable sequence; the finally-stable data are predicted through an ARIMA model; if a differential sequence is predicted, restoration is carried out, and a prediction value for the doubtful value is obtained; data before the current doubtful value of the sequence are subjected to the same prediction, the average value for prediction errors is solved as a prediction error standard to be compared with the prediction value for the doubtful value, and whether to be an abnormal value for the light curve is finally judged. By adopting the technical scheme of the invention, the light curve formed by brightness of astronomical stars observed by the GWAC is detected, and abnormal stars can be found out.

Description

technical field [0001] The invention relates to an abnormal detection method for GWAC light curve, in particular to a GWAC light curve abnormal detection method based on Grubbs criterion and ARIMA. Background technique [0002] Ground-based Wide-Angle Camera array GWAC (Ground-based Wide-Angle Camera array) is a Chinese-French cooperative gamma-ray burst detection astronomical satellite "Space Multi-band Variable Objects Monitor SVOM (Space Multi-band Variable Objects Monitor, space-based multi-band space variable source monitor) "The key ground equipment. GWAC’s short-time-scale 15-second exposure and large field of view capability generate images on the sky area for us. After point source extraction and cross-certification of the images, time series curves related to light intensity are generated, that is, light curves. [0003] The light curve is an astronomical representation of the brightness change of a celestial body relative to time, and it is a function of brightne...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00
Inventor 冯天智毕敬张立波
Owner BEIJING UNIV OF TECH
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