20 March 1999, Volume 14 Issue 1

    

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  Calibration of Microwave Radiometer

  LI Jing, JIANG Jing-Shan, LI Mao-Tang-

  Remote Sensing Technology and Application. 1999, 14(1): 1-4. https://doi.org/10.11873/j.issn.1004-0323.1999.1.1

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  Two calibration methods of microwave radiometer were introduced in this paper, one is step calibration, and another is integrated calibration. The precision of step calibration is low because more middle parameters need to be measured during calibration. The precision of integrated calibration is high because there is no middle process and it is finished in one time. The shortcoming of integrated calibration is that it needs one accurate and stable noise source for the antenna. So the cost of integrated calibration is high. The integrated and step calibration for 5 4GHz and 37GHz microwave radiometers have been done under current experimental condition in our laboratory. The results of using two calibration methods were compared.

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  Spaceborne Fourier Transform Spectrometer for Atmospheric Sounding

  Remote Sensing Technology and Application. 1999, 14(1): 5-10. https://doi.org/10.11873/j.issn.1004-0323.1999.1.5

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   High resolution remote sensing of earth atmosphere plays a critical role in realizing numerical weather forecast and monitoring environmental changes. This article describes the importance of spaceborne Fourier transform spectrometric technology in implementing the high precision measurement, its development and present status. The requirement for spectral band and resolution is proposed from the application’s point of view, the overview of typical instrument is discussed, and the key techniques...

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  Study on Spaceborne Topography Mapping Altimeter

  Remote Sensing Technology and Application. 1999, 14(1): 11-14. https://doi.org/10.11873/j.issn.1004-0323.1999.1.11

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  This paper presents the system scheme of a new radar altimeter suitable for high spatial resolution earth topography observation.The new system is equipped with two parabolic antennas.The synthetic aperture techniques in azimuthal direction and the linear frequency modulation (LMF) pulse compression techniques ensures the two dimensional resolution of the terrain resolution cell,while the correlation phase extraction processing of the signals from the two receiving channel enables the estimation...
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  Preliminary Study of In situ Calibration Standard of Airborne Imaging Spectrometer

  Remote Sensing Technology and Application. 1999, 14(1): 15-19. https://doi.org/10.11873/j.issn.1004-0323.1999.1.15

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  Starting with the definition,the in situ calibration standard of airborne imaging spectrometers was explored in this paper, which highly summarized a lot of rules of operation to remote sensing sensor calibration in the world.The objective of this study is to spread the in situ calibration of remote sensing sensor and push forward the quantitative remote sensing applications.
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  The Real time Signal Processing Simulation for Spaceborne Ocean Radar Altimete

  Remote Sensing Technology and Application. 1999, 14(1): 20-24. https://doi.org/10.11873/j.issn.1004-0323.1999.1.20

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  In this paper, the chief principle of the ocean radar altimeter (RA) is briefly introduced. The real time simulation experiment of the quasi maximum likelihood emulation is successful through the IF simulator, which is implemented by digital signal processor and can generate realistic return waveforms.
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  Near Field Calibration Techniques for Radar Scatterometer

  Remote Sensing Technology and Application. 1999, 14(1): 25-28. https://doi.org/10.11873/j.issn.1004-0323.1999.1.25

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  In this paper,procedure of the absolute calibration for ground based scatterometer is presented.Effects of the far field criterion for the calibration is analyzed.The concept of effective radar cross section(ERCS)is introduced to unify the calibration formula for near field region and far field region measurement.A practical calibration method is proposed.Some calibration results show the validity of the given method.

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  Method Research on Design and Manufacture of Space Camera’s Moving Part

  Remote Sensing Technology and Application. 1999, 14(1): 29-31. https://doi.org/10.11873/j.issn.1004-0323.1999.1.29

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  This paper gives an idea about how to design and manufacture the moving parts of the space cameras better.The writer emphasizes the necessity and the possible for us to make an expert system,and he also gives the frame of the system.
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  Development of Mechanical Cooling Technology and Its Application to Space Remote Sensing

  WU Yinong

  Remote Sensing Technology and Application. 1999, 14(1): 32-36. https://doi.org/10.11873/j.issn.1004-0323.1999.1.32

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  The mechanical cryocoolers must possess enough adaptability to the tough space environment in practical space application.In this paper,ways to make sure the space use of mechanical cooler were discussed,and two kinds of new mechanical coolers were also introduced to the future space borne remote sensing instrument. 
   

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  Delay Cloud Picture Correction Algorithm and Its Realization for FY 1 Meteorological Satellite  

  Remote Sensing Technology and Application. 1999, 14(1): 37-41. https://doi.org/10.11873/j.issn.1004-0323.1999.1.37

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  The paper has developed an algorithm to deal with the real time processing of the delay cloud picture data.It is designed for the Global Delay Picture Transmission (GDPT) processor of the remote sensing system of FY 1(02) meteorological satellite.On the basis of the algorithm,the earth area is divided and sampled unevenly to correct the geometrical distortion of the acquired picture,which is a result of the earth curvature.The built in software of the GDPT processor of Scanning Radiometer has re...
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  Information Mining and Knowledge Discovery from Satellite Remote Sensing Data Based on Information Theory A Study Case on Geological Application

  Remote Sensing Technology and Application. 1999, 14(1): 42-48. https://doi.org/10.11873/j.issn.1004-0323.1999.1.42

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   The limited capability and efficiency for information extraction is just the key factor that keeps remote sensing data from better applications.However,the theory of Data Mining(DM) and Knowledge Discovery from Databases(KDD) which was presented at the end of 1980’s has provided us with a new idea to solve this problem.Based on the procedure analysis of DM and KDD technique as well as performing on an information interpretation of satellite data with information theory,the thesis firstly present... 

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  A Study of Geographic Information Data Protection

  Remote Sensing Technology and Application. 1999, 14(1): 49-53. https://doi.org/10.11873/j.issn.1004-0323.1999.1.49

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  It is a conflict between sharing and protection of geographic data.Sharing geographic data is aims but we must make geographic security policies for best sharing the data.China data protection policies will result in a lowering level,this paper proposed a suggestion about enhanced protection security policies of geographic data,provided a schema for data protection and given a example to exlpanation the using.
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  A Study on Wetland Classifying of Remote Sensing in Sanjiang Plain  

  Remote Sensing Technology and Application. 1999, 14(1): 54-58. https://doi.org/10.11873/j.issn.1004-0323.1999.1.54

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  Through analyzing the spectrum symbols,the landscape spectrum scenery,the living conditions of wetland floras in Sanjiang Plain,this paper found out the symbols of wetlands on remote sensing image,and established a series of classification models of remote sensing for different kinds of wetlands.
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  A Preliminary Approach on the Generation,Display and Analysis of Digital Terrain Model of Planation Surface Taking Meiwu Plateau as an Example

  Remote Sensing Technology and Application. 1999, 14(1): 59-64. https://doi.org/10.11873/j.issn.1004-0323.1999.1.59

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  This article taking typical planation region of Taizi Montain,Meiwu plateau as a case,based on remote sensing and computer technology,explores a new method for genesis,audo visually and precisely showing,quantitative analysis of 3 Dimension Digital Terrain Model of planation.By this means,many quantitative features which reflect the terrain character of Meiwu planation,such as grade,slope,curvature,relief,etc.,are calculated,counted and analyzed,so for the first time,so many precisely quantitati...

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  A Primary Discussion on the Function of Remote Sensing Technology in the Sustainable Development Study

  Remote Sensing Technology and Application. 1999, 14(1): 65-71. https://doi.org/10.11873/j.issn.1004-0323.1999.1.65

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  In this paper,the formation of sustainable development thought and its concept and connotation are discussed.Then the application of remote sensing technology to global environment change study,natural resources survey and environment monitoring are analysed.Based on above discussion,it is concluded that remote sensing technology enchances the feasibility of the realization of global and regional sustainable development and it is one of the basic technology of sustainable development study.