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| 1 | Radiometric cross-calibration of the CBERS-02 CCD camera with the TERRA MODIS显示文摘For the application of the CCD camera, the most important payload on CBERS-02, the key is to provide long-term stable radiometric calibration coefficients. Although the vicarious calibration had been proved successful, it had its limitations such as test site requirement and unsuitable for historical data. Cross-calibration is one of the alternative methods, but it needs synchro surface spectrum to achieve spectral band matching factors. Our effort is to probe the influences on these factors. Simulations with a lot of surface spectrum showed that the factors changed with the viewing geometry, atmospheric condition and surface targets. However, simulating with the same viewing geometry and atmospheric condition, the spectral band matching factors of the same or similar surface targets’ spectrum acquired from different dates and different places would like to be consistent to each other within 1%―5%. Thus, the synchro measurement data can be substituted by the same or similar target from other source. Based on this method, using the MODIS as the reference, the cross-calibration was performed for CCD camera. The research demonstrated that the traditional method with single calibration site was inappropriate for CCD camera, since the offsets for its four spectral bands were not zeros. With four calibration sites, these offsets were obtained. And the camera was detected to degrade with dates based on four times of cross-calibrations. | LI Xiaoying1,2,3, GU Xingfa1,3,4, MIN Xiangjun5, YU Tao1,3, FU Qiaoyan5, ZHANG Yong1,2,3 & LI Xiaowen1,3 1. State Key Laboratory of Remote Sensing Science, Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University, Beijing 100101, China 2. Graduate University of Chinese Academy of Sciences, Beijing 100039, China 3. The Center for National Spaceborne Demonstration, Beijing 100101, China 4. Institut National de la Recherche Agronomique, Climat Sol Environnement, 84914 Avignon, France 5. China Center for Resource Satellite Data and Application, Beijing 100830, China | 2005 | Science China(Technological Sciences)2005，48，S2： | 15 |
| 2 | HJ-1A HSI on-orbit radiometric calibration and validation research显示文摘The calibration experiment data at Dunhuang radiometric calibration site in October, 2008 were used to achieve the on-orbit radiometric calibration for HJ-1A hyper spectral imager (HSI). Two other field experiments data were used to validate the Dunhuang calibration results. One field experiment took place in Inner-Mongolia, China in September, 2008, and the other field experiment took place in Lake Frome, Australia in February, 2009. Finally, the ‘confidence interval of calibration error’ concept was put forward for quantitatively computing the calibration coefficient error confidence interval. The results showed that the Dunhuang calibration results in 2008 had high reliability. The confidence intervals of calibration error for all HSI channels were between 2% to 12%, which could satisfy the requirement of the HSI quantitative applications. | GAO HaiLiang1,2,3*, GU XingFa1,3*, YU Tao1,3, GONG Hui1,2,3, LI JiaGuo1,2,3 & LI XiaoYing1,3 1 State Key Laboratory of Remote Sensing Science, Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University, Beijing 100101, China 2 Graduate University of Chinese Academy of Sciences, Beijing 100039, China 3 Center for National Spaceborne Demonstration, Beijing 100101, China | 2010 | Science China(Technological Sciences)2010，53，11： | 10 |
| 3 | Absolute radiometric calibration of CBERS-02 IRMSS thermal band显示文摘Based on the laboratory calibration before launch of CBERS-02 IRMSS thermal infrared channel, the onboard blackbody calibration, the radiometric cross- calibration against TERRA MODIS corresponding channel and the in-flight field calibration at Lake Qinghai: water surface radiometric calibration test site of China on Aug. 17, 2004 are carried out in this research. When making onboard blackbody calibration of CBERS-02 IRMSS, it is necessary to understand inside structures and light path in IRMSS camera and receive and process calibration blackbody signals at normal and high temperatures. Onboard blackbody calibration results of each detector are very important to relative radiometric calibration of images processing and absolute radiometric calibration of each detector. In-flight field calibration mainly contains field experiments, obtaining synchronous images, spectrum marching and MODTRAN radiative transmi- ssion computation. Radiometric cross-calibration of CBERS-02 IRMSS thermal band against TERRA MODIS selected 6 times synchronous images of two sensors passing through Lake Qinghai and Lake Taihu from August to December, 2004 to compute the cross calibration data. Combining the in-flight field calibration and radiometric cross calibration data, the absolute radiometric calibration coefficients are calculated by the linear regression method. This new calibration model can obviously control the radiometric calibration uncertainties aroused by the single point method used in the in-flight calibration of CBERS-02 IRMSS, this kind of sensors cannot receive the cosmic background radiation. In this research, the radiometric calibration coefficients obtained through the linear regression model are 8.53 (gain, unit: DN/W m?2sr?1μm?1) and 44.92 (offset, unit: DN). | ZHANG Yong1,2,3, GU Xingfa1,3,4, YU Tao1,3, ZHANG Yuxiang5, CHEN Liangfu1,3, LI Xiaoying1,2,3, LI Xiaowen1,3 & HE Liming6 1. State Key Laboratory of Remote Sensing Science, Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University, Beijing 100101, China 2. Graduate University of Chinese Academy of Sciences, Beijing 100039, China 3. The Center for National Spaceborne Demonstration, Beijing 100101, China 4. Institut National de la Recherche Agronomique, Climat Sol Environnement, 84914 Avignon, France 5. National Satellite Meteorological Center, Beijing 100081, China 6. State Environmental Protection Administration, Beijing 100029, China | 2005 | Science China(Technological Sciences)2005，48，S2： | 6 |
| 4 | In flight MTF monitoring and compensation for CCD camera on CBERS-02显示文摘In this article, the approach of simulating ideal tarp scene was proposed to determine the MTF for CCD camera on CBERS-02. The MTF acquired from this technique was compared to those from some common methods. MTFs achieved from different approaches were employed to compensate the CCD images based on three restoration algorithms: the iterative method, the Wiener filter and the modified inverse filter (MIF). The two-dimensional MTF was established with the value at frequency 0.5 for 45° directional MTF as the value at its four corners. This article addressed the variations of the restored CCD images with different techniques of constructing two-dimensional MTF, restoring algorithms and determining the in-flight MTFs. Results showed images restored with the MTF determined from the technique of simulating ideal tarp scene represent the real scene best. And the restoration technique based on the MIF would produce better restored images than the other two techniques. This research also demonstrated that the two-dimensional MTF used for restoration should be interpolated under the control of the MTF for 45° axis, rather than by multiplying the cross-orbit MTF with along-orbit MTF. | GU Xingfa1,2,3, LI Xiaoying1,2,4, MIN Xiangjun5, YU Tao1,2, SUN Jijuan5, ZENG Yong1,2,4, XU Hua1,2 & GUO Ding2,6 1. State Key Laboratory of Remote Sensing Science, Jointly Sponsored by the Institute of Remote Sensing Applications of Chinese Academy of Sciences and Beijing Normal University, Beijing 100101, China 2. The Center for National Spaceborne Demonstration, Beijing 100101, China 3. Institut National de la Recherche Agronomique, Climat Sol Environnement, 84914 Avignon, France 4. Graduate University of Chinese Academy of Sciences, Beijing 100039, China 5. China Center for Resource Satellite Data and Application, Beijing 100830, China 6. University of Electronic Science and Technology of China, Chengdu 610054, China | 2005 | Science China(Technological Sciences)2005，48，S2： | 4 |
| 5 | stiation of antigm-specific T cells with limited functional capacity during Mycobact~um tuberculosisinfecfion显示文摘 | Jeong YH Jeon BY Gu SH | 2014 | Infgctlmmtm2014，82，1： | 1 |
| 6 | Prevalence of epilepsy in the People’s Republic of China:A systematic review显示文摘 | Gu L Liang BY Chen Q | 2013 | Epilepsy Res2013，105，12： | 1 |
| 7 | Low dose gossypol for male contraception显示文摘 | Gu ZP Mao BY Wang YX | 2000 | Asian J Androl2000，12，4： | 1 |
| 8 | Association of lysyl oxidase-like-1 gene polymorphisms with exfnliation syndrome in Koreans 显示文摘 | Sagong M Gu BY Cha SC | 2011 | Mol Vis2011，17，： | 1 |
| 9 | Perspectives of SEREX-defined antigens in diagnosis and immunotherapy for gastric cancer 显示文摘 | Wang YW Gu Ql Liu BY | 2004 | Cancer Biol Ther2004，3，： | 1 |
| 10 | Low dose gossypol for male contraception显示文摘 | Gu ZP Mao BY Wang YX | | 0，，： | 1 |
| 11 | Subclassified acutely dissociated cells of rat DRG: histochemistry and patterns of capsaicin-, proton-, and ATP-activated currents 显示文摘 | Petruska JC Napaporn J Johnson RD Gu JG Cooper BY | 2000 | J Neurophysiol2000，84，5： | 1 |
| 12 | Distribution of P2X1,P2X2, and P2X3 receptor subunits in rat primary afferents: relation to population markers and specific cell types显示文摘 | Petruska JC Cooper BY Gu JG | 2000 | J Chem Neuroanat2000，20，2： | 1 |
| 13 | Winter habitat use by Black-necked Cranes Grus nigricollis in Tibet显示文摘 | Bishop MA Canjue Z Song YL Harkness J Gu BY | | 0，，： | 1 |
| 14 | Bar-headed Geese Anser indicus wintering in south-central Tibet显示文摘 | Bishop MA Song YL Canjue Z Gu BY | | 0，，： | 1 |
| 15 | complexee in vivo显示文摘 | Yuan L Gu R Xuan Y -Allosteric regulation of transport activity by heterotrimerization of Arabidopsis ammonium transporter | 2013 | The Plant Cell2013，25，3： | 1 |
| 16 | Association of lysyl oxidase-like 1 gene polymorphisms with exfoliation syndrome in Koreans 显示文摘 | Sagong M Gu BY Cha SC | 2011 | Molecular Vision2011，10，： | 1 |
| 17 | Distribution of P2X1,P2X2,and P2X3 recept or subunits in rat primary afferents:relation to population markers and specificcell types显示文摘 | PETRUSKA JC COOPER BY GU JG | 2000 | J Chem Neuroanat2000，20，2： | 1 |
| 18 | Biomimetic deposition of apatite coating on surface-modified NiTi alloy显示文摘 | Gu YW Tay BY Lim CS | 2005 | Biomaterials2005，26，34： | 1 |
| 19 | In vitro bioactivity and osteoblast response of porous NiTi synthesized by SHS using nanocrystalline Ni-Ti reaction agent显示文摘 | Gu YW Li H Tay BY | 2006 | J Biomed Mater Res A2006，78，2： | 1 |
| 20 | Biomimetic deposition of apatitecoating on surface-modified NiTi alloy 显示文摘 | Gu YW Tay BY Lira CS | 2005 | Biometerials2005，26，34： | 1 |
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