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ngVn Xun

Thanh Tun

L Vn Hong

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Quan st tonb vng khng gian m iph sng v hinth tonbmc tiu trong vng quan st ln hthngchthcai radar.

Hinthv trmc tiu tcthi v trc, gip xc nhv trhinti v hng di chuyncamc tiu.

T tn hiuphnxcamc tiu, c th xc nhc cctham scamc tiu nh: C ly, gcphngv , cao..

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S cutocbncamththng radar gim st scp:

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Khingb:To ra xung kch pht ngthingthian kch thch my pht v tong qut mntrn nhin sng tai cng 1 thiim.Xung ny kch thch my pht, pht x xung

RF, ngthi kch thch ng qut ca mn

hnh.

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Khi my phtPht ra nnglng RF an anten vbcx

ra khng gian. Khi xung pht xgpmc tiu, mt

phnnh tn hiuscphnxtrli theohngca anten sc thu li.

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Khi my thuTn hiu thu c, sc my thu tch xung v

cung cp tn hiuthtn cho mn hnh, tn hiuth

tn ny sto ra 1 vt sng trnbmtcanhnh, v tr ny thhinv trcamc tiu so vii Radar.

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S qu trnh hotngca Radar:

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Tn snnglng RF pht x v phn cc (F) Cng sut nh ca xung pht x (Pt) rng xung ca xung pht x ( ) H s khuch i ca anten (G) rng cnh sng trong mt phng ngang ( ) rng ca cch sng gin trong mt phng ng () Tn s lp li xung (PRF) Tc quay ca anten (S) nhy my thu (Prmin) Mc tp (N) Gii thng (B) Ts xa tp nhiu H s hiu dng ca mc tiu di ng(I)

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Tham sca radar gim st ng di v tipcn:

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Nu anten i radar quay trn xung quanh i th slng xung Nxtrong 1 rng cnh sng va chm vo mc tiu c tnh theo cngthc:

Trong : PRF tnslpli xungrng cnh sng

rps tc quay ca anten i (vng/pht)

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Vng quan st l min khng gian, trong i Radarbom cho ra thng tin vmc tiu vichtlng khng thp

hn yu cu.Hnh dng vng quan st cctrngbi:- Dngthitdin vng quan st trong mtphngng.- Phm vi gc quan st trong mtphngphngv (mp

ngang).

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Tlphchisliu. chnh xc ophngv C ly hotngcci Nhiutpchuynng

phn giic ly Nhiucnh phn giiphngv Cc tn hiugi chnh xc oc ly

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