流动VLBI技术用于电离层探测

:04940911(2002)08002503:P228:B流动VLBI技术用于电离层探测刘光明,乔少敏,胡国军(西安测绘研究所,陕西西安710054)UsingMobileVLBIforIonosphereExplorationLIUGuangming,QIAOShaomin,HUGuojun:VLBI,:VLBI;;:20011211:(1976),,,,60~1000km,,,,;,,(),5%~10%VLBI,,,,,,()[1],VLBIVLBI1,()VLBIA,VLBIB,32VLBI,A,BAB1,,VLBIf,=qB-qAf2(1)q=Cr0Ne2(2)C;r0;Ne(),f1,f2(f2f1)1=+1=+qB-qAf21(3)2=+2=+qB-qAf22(4)252002年第8期测绘通报(3)(4)qB-qA=(f1f2)2f22-f21(1-2)(5)(2)BNeB=NeA+2(f1f2)2Cr0f22-f2112(6)12=1-2(7)1,2ANeN,BNeBVLBI,VLBI[2]:SNR=SC5000DADB!A!BTsATsBBT(8),SC;D;!;B;T;Ts∀∀=122BSNR(9)(7)(8)SCB32T12=K∀(10)K=1225000DADBTsATsB!A!B2VLBI,K(10),∀,SC,BT,,5min,1s,[3],,VLBIX0.4!,1![4],(6),1,21212,VLBI(1)(2)NeB-NeA=2Cr0f2d,(NeB-NeA)d(NeB-NeA)=2Cr0f2d(11),(NeB-NeA)f,(6)d(NeB-NeA)=2Cr0f211-f21f22d12(12)d1212,f1d12f2X(8.2~8.6GHz)S(2.2~2.4GHz)VLBI2,f1=2.2GHz,f2=8.6GHzVLBI,BNeBdNeB=[d(NeB-NeA)]2+[dNeA]2(13)VLBI,d1=d2=30ps[5],(7)d12=2di=42.4ps,i=12d12,f1,f2(12),d(NeB-NeA)=1.6∀1015/m2(14)Ne1017/m2,ANeAdNeANe5%~10%NeAdNeA=Ne∀dNeANe/m2(15)26测绘通报2002年第8期(15)dNeA5∀1015~1∀1016/m2,(14)d(NeB-NeA)dNeA13(13)dNeB#dNeA(16)VLBI,,VLBI,VLBIVLBIA,VLBI,ANeA=0A,,VLBI1%~0.1%,RADIOASTRONVLBI4(K,C,L,P),VSOPVLBI3(K,C,L),VLBIS,X,VLBIVLBIVLBI,,,VLBI,GPS,,:[1],,[M].:,1983.[2].[M].:,1985.[3].VLBI[J].,2001,18(2).[4],,VLBI[J].,1999,16(2).(上接第18页)1.;2.,,;3.,45!,,,45!,,45!,;4.,,,,,,:45!,,,1∃51∃2.5,1∃101∃5,,,,,:[1],.[M],:,2000.272002年第8期测绘通报