A Quality Evaluation Method for Antarctic Grounding Wire Based on Multi-source Observational Data

Abstract

The invention relates to a multi-source-observation-data-based quality evaluation method of a ground wire of the South Pole. The method comprises the following steps: (1), obtaining relative positions as well as qualitative and quantitative analysis evaluation indexes of ground wires of the South pole; (2), carrying out error classification based on an evaluation standard of the ground wire of the South pole and classifying differences among the ground wires into three parts: an acceptable error range, a rough difference existence range, and a ground wire change range; (3), analyzing the data of the ground wires of the South Pole by using an analytical method combining the South Pole altimetry data, an analytical method combining the digital elevation model of the South Pole, and an analytical method combining the multi-stage high-resolution remote-sensing image of the South Pole; and (4), outputting determination and results of the ground wires of the South Pole. Compared with the prior art, the qualitative and quantitative analysis evaluation indexes are determined for all South-Pole data and the errors are classified; and analyses are carried out based on combination with the altimetry data, the digital elevation model, and the multi-stage high-resolution remote-sensing image of the South Pole. Therefore, comprehensiveness and accuracy of quality evaluation are guaranteed.

Description

technical field [0001] The invention relates to a data quality evaluation method, in particular to a method for evaluating the quality of Antarctic grounding wires based on multi-source observation data. Background technique [0002] The grounding line is the boundary line between the inland ice sheet and the floating ice shelf, and is where ice flow breaks away from the ice bed. The location of the grounding line is very important for us to calculate ice sheet mass balance, simulate numerical models of ice sheet dynamics, and study the interaction between ice and ocean. In order to further understand the dynamic changes of the ground wire, we must have a precise understanding of the ground wire position. In addition, most oceanographic and glaciological applications also require knowledge of the exact location of the grounding line. The grounding wires designed by the present invention include: MOA grounding wires, which are obtained by visually interpreting the images of...

AI Technical Summary

Problems solved by technology

The currently available on-site inspection methods are ground and airborne echo detection, but the coverage area is very small, and only small-scale evaluation can be carried out

Images