全球多源對地觀測數據集成研究

袁文平+劉素紅++屈永華++柏延臣++唐海蓉

摘 要：“全球多源對地觀測數據集成研究”收集了1981年以來全球10多種衛星原始數據、6種衛星高級數據產品、氣象生態臺站網絡和各種地面觀測數據，并在此基礎上對所收集的數據進行整理和格式轉換，該題經統計、收集、整理和匯編總量近600TB的衛星遙感數據。采用時間序列方法，輔以時空先驗知識和時空連續性，實現全球多年MODIS和AVHRR地表反射率數據云雪監測和時空濾波，生成多年時空連續的高質量地表反射率數據。針對全球陸表特征參量產品生產的原始數據、預處理數據、中間產品數據和產品數據，客觀地進行數據的分級和編目，構建全球陸表特征參量數據集成平臺，實現數據全生產鏈路有效性檢測和數據完整性檢測。建立陸表特征參量產品在線分發服務系統，并于2012年12月22日在地球觀測組織（Group on Earth Observations，GEO）第9次全會上面向全球用戶公開發布。同時通過北京師范大學全球變化與數據處理中心和美國馬里蘭大學的Global Land Cover Facility向全球用戶提供免費的數據查詢、檢索和下載服務。

關鍵詞：衛星數據 預處理 遙感數據庫 數據分發服務

Abstract： “Global Multi-source Earth Observations Integration Research” is the first program of the High-Tech Research and Development program（863 program）"Generation & Applications of Global Products of Essential Land Variables". The program collects more than 10 kinds of satellite raw data， 6 kinds of advanced satellite products， ecological meteorological stations network and ground observation dataset since 1981， on the basis of the collected data for sorting and format conversion， the total satellite remote sensing data nearly up to 600 TB by statistics. The program carried out a spatio-temporal cloud & snow detection and filtering process for the global AVHRR and MODIS surface reflectance dataset with time series analysis method based on the prior knowledge and spatio-temporal characters of these datasets， generated spatio-temporal continuous high quality multi-year surface reflectance products. The raw data， preprocessed data， intermediate products and final products was classified and catalogued objectively in order to build the global land surface characteristic parameter data integration platform and implement the data validity and data integrity detection in the full production link. The program also establish the online distribution service system of land surface characteristic parameters products， and publish to the global users for free in the session 9 conference of Earth observation Group （Group on Earth Observations， GEO）. The Global Change and the Data Processing Center of Beijing Normal University and the University of Maryland Global Land Cover Facility to the Global users with data query， search and download service for free at the same time. This is the first time of China to generate and publish advanced global land surface satellite product with China's independent intellectual property rights， which is make up the blank of no advanced remote sensing product brand in our country， rewritten the history of our country is just another product users， but also greatly promote the sharing of global earth observation data.

Key Words： Satellite images； Data processing； Remote sensing database； Data distribution service

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