ITU-R REPORT RS 2094-2007 Studies related to the compatibility between Earth exploration-satellite service (active) and the radiodetermination service in the 9 300-9 500 MHz and 9 atio.pdf
《ITU-R REPORT RS 2094-2007 Studies related to the compatibility between Earth exploration-satellite service (active) and the radiodetermination service in the 9 300-9 500 MHz and 9 atio.pdf》由会员分享,可在线阅读,更多相关《ITU-R REPORT RS 2094-2007 Studies related to the compatibility between Earth exploration-satellite service (active) and the radiodetermination service in the 9 300-9 500 MHz and 9 atio.pdf(51页珍藏版)》请在麦多课文档分享上搜索。
1、 Rep. ITU-R RS.2094 1 REPORT ITU-R RS.2094 Studies related to the compatibility between Earth exploration-satellite service (active) and the radiodetermination service in the 9 300-9 500 MHz and 9 800-10 000 MHz bands and between Earth exploration-satellite service (active) and the fixed service in
2、the 9 800-10 000 MHz band (2007) TABLE OF CONTENTS Page 1 Introduction 3 2 EESS (active) 3 2.1 Applications 3 2.2 Parameters. 3 3 Radiodetermination services. 5 3.1 Applications 5 3.2 Parameters. 5 4 Fixed service. 11 4.1 Applications 11 4.2 Parameters. 11 5 Interference analysis. 12 5.1 Analysis St
3、udy No. 1: Assessment of potential interference from the radiodetermination service to active spaceborne sensors operating in the 9 300-9 500 MHz band and 9 800-10 000 MHz band 12 5.1.1 Analysis approach 12 5.1.2 Analysis results 16 5.1.3 SAR interference mitigation techniques 19 5.1.4 Analysis conc
4、lusion . 20 5.2 Analysis Study No. 2: Assessment of the potential for interference from ground based meteorological radars into the EESS (active) in the band 9 300-9 500 MHz 21 5.2.1 EESS (active) simulated parameters 21 5.2.2 Meteorological radar simulated parameters. 21 5.2.3 Results 21 5.2.4 Conc
5、lusion . 23 2 Rep. ITU-R RS.2094 Page 5.3 Analysis Study No. 3: Assessment of maximum interference levels from the EESS (active) into the radiolocation service in the bands 9 300-9 500 MHz and 9 800-10 000 MHz . 23 5.3.1 Analysis approach 23 5.3.2 Analysis results 23 5.3.3 Discussion of interference
6、 mitigation 25 5.3.4 Analysis conclusion . 25 5.4 Analysis Study No. 4: Analysis of potential interference from the EESS (active) into ground-based meteorological radars operating in the radiolocation service in the band 9 300-9 500 MHz. 25 5.4.1 Preliminary analysis. 26 5.4.2 Additional factors to
7、mitigate interference to meteorological radars. 30 5.4.3 Conclusion Re-evaluating data from the preliminary analysis . 34 5.5 Analysis Study No. 5: Compatibility studies between the EESS (active) and the fixed service in the 9 800-10 000 MHz band 36 5.5.1 Analysis approach 36 5.5.2 Analysis results
8、40 5.5.3 Analysis conclusion . 44 6 Examples of spaceborne SAR interference mitigation techniques. 45 6.1 Example 1: Selection of emission characteristics for interference mitigation of active spaceborne sensors in EESS (active) for use in the 500 MHz bandwidth near 9.6 GHz. 45 6.1.1 Selection of EE
9、SS (active) characteristics for interference mitigation 45 6.1.2 Analysis conclusion . 47 6.2 Example 2: Interference mitigation technique using active spaceborne sensor SAR3 antenna in EESS (Active) for use in 500 MHz bandwidth near 9.6 GHz 47 6.2.1 Technical characteristics of wideband active spac
10、eborne sensor SAR3 antenna 47 6.2.2 Technical characteristics of terrestrial radar system 49 6.2.3 Receive power profiles at terrestrial stations . 49 6.2.4 Analysis conclusion . 51 7 Summary and conclusion 51 8 Supporting documents 51 Rep. ITU-R RS.2094 3 1 Introduction The purpose of this Report i
11、s to summarize the results of the studies related to the compatibility between Earth exploration-satellite service (EESS) (active) and the radiodetermination service in the 9 300-9 500 MHz and 9 800-10 000 MHz bands and between EESS (active) and the fixed service in the 9 800-10 000 MHz band. 2 EESS
12、 (active) 2.1 Applications In 2007 there are five synthetic aperture radars (SAR) that are planned to operate in the band near 9.6 GHz. These include the SARs found on board the four satellites of a constellation as commissioned by the Italian Space Agency (ASI) but not yet launched; and one SAR lab
13、elled “SAR3” that is currently under consideration by the United States National Aeronautics and Space Agency (NASA). The SARs operating near 9.6 GHz would be controlled via ground command to turn on and off as required to view only specific areas on the earth due to power constraints of the spacecr
14、aft. This mode of operation results in the SAR transmitting for 10% to 20% of the time. Another mode of operation is the spotlight mode. In the spotlight mode, a look angle is selected between 20 and 44, and data will typically be collected by taking 49 to 65 sub-swaths of 20 km in range by 0.35 km
15、in azimuth. This data can then be put into a mosaic of the sub-swaths in azimuth to process a 20 km by 20 km image. 2.2 Parameters Technical characteristics of spaceborne active sensors in the frequency band 9 300-10 000 MHz are given in Table 1, the SAR1 antenna gain pattern is given in Table 2, th
16、e SAR2 antenna gain pattern is given in Table 3 and the SAR3 antenna gain pattern is given in Table 4. TABLE 1 Technical characteristics of proposed SAR Parameter SAR1 SAR2 SAR3 Orbital altitude (km) 400 619 506 Orbital inclination (degrees) 57 98 98 RF centre frequency (GHz) 9.6 9.6 9.6 Peak radiat
17、ed power (W) 1 500 5 000 25 000 Pulse modulation Linear FM chirp Linear FM chirp Linear FM chirp Chirp bandwidth (MHz) 10 400 450 Pulse duration (s) 33.8 10-80 1-10 Pulse repetition rate (pps) 1 736 2 000-4 500 410-515 Duty cycle (%) 5.9 2.0-28.0 0.04-0.5 Range compression ratio 338 60 Horizontal (a
18、zimuth) Gh(h ) = 0 612.2(h )2Gh(h ) = 12 Gh(h ) = 0 27.0 (h ) Gh(h ) = 35 h1.3 Beam pattern G() = Gv(v ) + Gh(h ), 3 max TABLE 3 SAR2 antenna gain pattern near 9.6 GHz Pattern Gain G() (dBi) as a function of off-axis angle (degrees) Angular range (degrees) Vertical (elevation) Gv(v ) = 46.0 0.835(v
19、)2Gv(v ) = 31.0 Gv(v ) = 26.0 Gv(v ) = 10.0 v30 Horizontal (azimuth) Gh(h ) = 0 444.5(h )2Gh(h ) = 16 Gh(h ) = 20.0 (h ) h 0.7 Beam pattern G() = Gv(v ) + Gh(h ), 3 max Rep. ITU-R RS.2094 5 TABLE 4 SAR3 antenna gain pattern near 9.6 GHz Pattern Gain G() (dBi) as a function of off-axis angle (degrees
20、) Angle range (degrees) Vertical (elevation) Gv(v) = 42.5 9.92(v)2Gv(v) = 31.4 0.83 vGv(v) = 10.5 0.133 v0 30 Horizontal (azimuth) Gh(h) = 0.0 9.07(h)2Gh(h) = +1.9 12.08 hGh(h) = 48 0 4.13 Beam pattern G() = Gv(v) + Gh(h) 3 Radiodetermination services 3.1 Applications The band 8 500-10 500 MHz is us
21、ed by many different types of radars on ground-based, transportable, shipboard, and airborne platforms. Radiodetermination functions performed in this frequency range include airborne and surface search, ground-mapping, terrain-following, navigation (both aeronautical and maritime), and meteorologic
22、al (both airborne and ground-based). 3.2 Parameters The radiodetermination radar characteristics were provided in reference 1. Characteristics were provided for ten airborne radar systems, nine shipborne radar systems, and eight beacon/ground-based radar systems that operate in the 8 500-10 500 MHz
23、band. A set of representative radar systems that operate in the 9 300-10 000 MHz band were selected for the following studies and their characteristics are listed in Tables 5, 6, and 7. TABLE 5 Characteristics of airborne radiodetermination radars in the 8 500-10 500 MHz band Characteristics System
24、A1 System A2 System A3 Function Search and track radar (multifunction) Airborne search radar Ground-mapping and terrain-following radar (multifunction) Tuning range (MHz) 9 300-10 000 8 500-9 600 9 240, 9 360 and 9 480 Modulation Pulse Pulse Non-coherent frequency-agile pulse-position modulation Pea
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ITURREPORTRS20942007STUDIESRELATEDTOTHECOMPATIBILITYBETWEENEARTHEXPLORATIONSATELLITESERVICEACTIVEANDTHERADIODETERMINATIONSERVICEINTHE93009500MHZAND9ATIOPDF
链接地址:http://www.mydoc123.com/p-793061.html