| 风云三号气象卫星数据传输体制分析 |
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| 引用本文： | 朱爱军.风云三号气象卫星数据传输体制分析[J].应用气象学报,2006,17(4):494-501. |
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| 作者姓名： | 朱爱军 |
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| 作者单位： | 1.中国科技大学电子工程与信息科学系, 合肥 230027 |
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| 摘 要： | 风云三号气象卫星 (FY-3) 是我国的新一代太阳同步轨道气象卫星, 其星-地数据传输体制采用了国际空间数据系统咨询委员会 (CCSDS) 推荐使用的先进在轨系统 (AOS) 规约和数据结构, 采用R-S编码和卷积编码级联的编码方式, 使用了L波段和X波段同时广播的方式。该文分析了FY-3星地数据传输体制, 将FY-3的传输体制与国外同类卫星传输体制进行了比较分析, 给出了FY-3的传输体制与风云一号 (FY-1) 的差别, 在此基础上提出了我国下一代气象卫星地面站建设的基本策略。
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| 关 键 词： | 风云三号气象卫星 数据传输体制 国外同类卫星 气象卫星地面站 基本策略 |
| 收稿时间： | 2005-11-17 |
| 修稿时间： | 2006-06-05 |
Analysis on Specification of FY 3 Meteorological Satellite Data Transmission |
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| Zhu Aijun.Analysis on Specification of FY 3 Meteorological Satellite Data Transmission[J].Quarterly Journal of Applied Meteorology,2006,17(4):494-501. |
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| Authors: | Zhu Aijun |
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| Affiliation: | 1.University of Science and Technology of China, Hefei 2300272.National Satellite Meteorological Center, Beijing 100081 |
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| Abstract: | The specification of FY-3 meteorological satellite data transmission between FY-3 satellite and user ground stations is analyzed.It helps user stations to understand specification and performance requirements of FY-3 meteorological satellite data communications interface.FY-3 will provide three types of data transmission capabilities.When FY-3 satellite passes the receiving station,the three downlinks transmit simultaneously.The three downlinks include: real time direct downlink of HRPT(high resolution picture transmission);real time direct downlink of MPT(moderate resolution picture transmission);direct playback for delay time data link of DPT(delay picture transmission).HRPT transmission adopts Lband and QPSK modulator and data rate of(4.2 Mbps) and EIRP(effective isotropic radiated power)of 41 dBm;MPT transmission adopts X-band and QPSK modulator and data rate of 18.7 Mbps and EIRP of 46 dBm;DPT transmission adopts X-band and QPSK modulator and data rate of 93 Mbps and EIRP of 46 dBm.Their channel coding adopts telemetry channel coding standard(CCSDS 101.0-b-5)and advanced orbiting systems-networks and data links architectural specification(CCSDS 701.0-B-2)(consultative committee for space data system(CCSDS) recommendations).DPT is transmitted only when satellite passes over China area and Svalbard area.FY-3 Meteorological Satellite will be launched in 2007,it will provide services for users to replace FY-1.National ground stations of FY-3 consist of Beijing ground station,Guangzhou ground station,Urumqi ground station and Svalbard ground station.They can receive HRPT,MPT and DPT data of FY-3.Other ground stations can receive only HRPT and MPT data of FY-3. The application data provided by the HRPT of FY-3 link are as follows:VIRR data,IRAS data,MWTS data,MWHS data,SBUS data,TOU data,MWRI data,SIM data,ERM data and SEM data.The application data provided by the MPT of FY-3 link only include science instrument data of MERSI.The application data provided by the DPT of FY3 link are as follows: MERSI data,VIRR data,IRAS data,MWTS data,MWHS data,SBUS data,TOU data,MWRI data,SIM data,ERM data and SEM data.The transfer frames and Source Packet structure of data are consistent with CCSDS.An introduction to the physical layer on HRPT/MPT is given in this paper.The physical layer includes: R-S encoding serial to parallel conversion convolution encoding synchronization and modulating.After Reed-Solomon encoding and pre-pending the attached Sync Marker,data are divided into I channel and Q channel,then rate 3/4 convolution encoding for HRPT and 1/2 convolution encoding for MPT are applied,then data are modulated with QPSK modulation.The main principle,calculating method and analyzing method of FY-3 HRPT link budget and FY-3 MPT link budget are also given.The differences of data transmission among FY-3 and METOP and NPP/NPOESS are discussed.Primary strategy to design the user stations is given: when direct read out user stations design their ground stations,the ability of acquiring data must be considered.It is very important that direct read out users stations must acquire the HRPT data and MPT data of FY-3,AHRPT data of METOP and HRD data of NPP. |
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| Keywords: | FY-3 meteorological satellite data transmission specification direct read out ground station primary strategy |
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