Task Oriented Satellite Sensor Clibration Data Management And Distribution

Calibration algorithm and calibration data managing,the two basic contents of calibration,has achieved some researching outputs and this paper will focus on data managing.At present,researches on calibration data managing are mainly concentrating on the aspect of calibration field data management.However,calibration field data is just the main data source of satellite sensor in-orbit calibration.moreover,in-orbit calibration is also just the part of satellite sensor calibration along with its lifecycle.Hence,the study of calibration data management currently is incomplete and lack of enough association with real calibrating work.To solve questions above,this paper firstly takes all calibrating processes in satellite sensor's whole lifecycle as study objects.And every process is expressed by a unique calibration task.Then based on which,this paper researched and designed the mechanism of task oriented satellite sensor calibration data management and distribution to offer overall and efficient data guarantee of satellite sensor calibration.The main research ideas and achievements are as follows:1)This paper concluded the characteristic of satellite sensor calibration data.Then took the position in satellite sensor calibration,the contents and the format of data into consideration,we designed the calibration data into six categories in the first step,and every category was further classified according to different loadtype in the second step.We tried to make the data with the similar content or format belong to the same category.and laid a foundation for analyzing and constructing calibration data model.2)This paper adopted a storage scheme which combine Oracle and file system based on the data storage model.Firstly,we adopt the format of E-R figures to express the conceptual model of classified sensor calibration data which belong to different loadtypes.Secondly,we decompose the complexity of calibration data by introducing the concept of calibration task.And then organized the logic model of it from three levels,this is the level of calibration task collections,the level of single calibration task data collection and the level of specific type calibration data of a single calibration task.Thirdly,the physical model of calibration data contains the structure of calibration field data and calibration task data.Moreover,the structure of calibration field data can not only storage the part belong to a calibration task,but also task irrelevantly.3)This paper designed the mechanism of calibration task oriented data distribution.Firstly,we combine the requirements of calibration task observation and calibration algorithm inputs,to design the unique expression of calibration task based on XML.And then checked the XML structure and the calibration data source by XSD technology.Secondly,we designed the calibration data distribution model.The model is composed of six aspects,that is calibration task requirements analyzing,multi-source data collecting,data classification,data pre-processing,data distribution and results archiving.Thirdly,we designed calibration data receiving service based on WCF and calibration data distribution based on LAN.To offer interface service between calibration data and others.Fourthly,we designed data pre-processing plugin service based on XML.To support expandability of data pre-processing.4)This paper designed satellite sensor calibration data management and distribution prototype and achieved it,To offer service of calibration data management and distribution.