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logo.gif (31909 bytes)pathivukal.gif (1975 bytes)             Pathivugal  ISSN 1481-2991

â:..â                                    Editor: V.N.Giritharan
â 2006 73 - !
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ȢŢ!
⧸ (GPS)! 
GPS: š áĢ!

- Ө Չ -

GPS⧸ Ĩ Ҹ Ȣ Ψ¢ Ƹ 측ǡ, š. . Ţ. š¢ġ Ƹ ǡ. . Ţ (ơ ۨ):

. ! GPS ¢ Ģ Ţ, Ţ¢ (Geophysics) šɢ¢ (Meteorology) GPS Ţ .. ȢŢ Ƣ Ƣ ž áξâ. ɢ, Ƹ ո.

1. Ӿ , ¢ GPS Ш째Ǣ (orbit) Geosynchronous Ȣ 츢ȣ. Ш째 12 ¢ .

2.GPS ʼ̧ǡ, Ǣġ, âġ Ũ ¡! GPS ¢ ̨. Ȣ GPS ¡ Ȣ Ҹ ġ. ģ š ̨ ¢ GPS ¢ Ȣ š츢 ⢠θ. θ?

Ƹ Ǣ¢ Ψ ŧ, š â¡  (facts) Ȩ Ҹȡ. , ȢŢ šи!

M. Siddhartha Muthu Viyayan,
CSIR Center for Mathematical Modelling and Computer Simulation,
Wind Tunnel Road,
Belur, Banglaore-37.

Ψ â :

Ȣ! ⧸ GPS Ȣ ŧ, ! ʧ¡ (Radio Communication) ҸǢ, ʧ¡ (Radio Frequency Integrated Circuits) Ũ . Ž GPS Ψ¢  ơ . GPS Ш째Ǣ Ȣ ȡ Ũ . Ȣ , Ƹ š ź . Ȣ!

1.

 ĸ Ţ, , Ģ ¡ Ш째Ǣ Ţ¢ ¡ɾ Ǩ Ȣš. , Ш째, , "Geosynchronous" "Geostationary" ȢŢ ̸. Ƣ Ţ¢ ¨-Geosynchronous, Geostationary-Ţ¢ ¨.

Ţ¢ ¨ è¢Ģ (Equator) 22,000 Ȣȡ. ¢ Ш째 24 ո. ¢ Ш째 측 ɡ , Ȣ Ш째 Ţ ̸.

ɢ Ө Ȣ ¢ GPS Ш째 츢 측
Ȣ ¢ (orbit) 11,000 츧. GPS , Ш째 ¢ ! Ш째 ¢ Ģ Ţ ¡ ź
Ȣȡ! 

2. Ǣ

ý GPS (Receiver)  Ȣ . Ш째Ǣ " ". [Line of Sight]
𨼨¢ Ȣ ¢ ԨŢ (Antenna) Ȣ. ɡ ̨ȧ! ɡ Ш째 ; . ̨  Ǣ ġ. ŢĢ ż (cable), ̨š Ҽ (low-loss) ż (coaxial cable) ţ Ũ ,  ɡ , ż ̨ ġ. š,
Ģ š¢ ̨¢ GPS 𼾡 ! 

. Ţ  

ɡ¡ ! GPS ŢԼ Ȣ ҽ.

¢ âҸ (crustal deformations)   GPS θ. Ģ  Ģ ʸ. ¢ Ţ , Ţ (tectonic plate),  53+/-0.15 Ģ ţ Ũ .  ż츢Ģ 츢, 50 ʸâ ¢ ո   Ȣ. ̾¢ Ţ , Ţ ţ 20 Ģ. Ũ ̾¢  Ţ¢ 𺢨 (strain accumulation) . 

ʺ 2004 Ŀ, Ţ ţĸ (Tsunami) Ƹ  1.6 . ¢ ɢ  (displacement) 6 ¢ GPS . " Ţ Ģ Ǣ Ŀ" Ȣž,  Ţ θ
Ŀ ¨ â Ƣ Ţ¡ GPS θ. 

:

1. http://www.cmmacs.ernet.in/~gps/ and Sridevei Jade, Sithartha M. Vijayan et al, Effect of M 9.3 Sumatra-Andaman Islands Earthquake of 26th December 2004 at some permenant and campaign GPS stations in the Indian continent,  International Journal of Remote Sensing. 

2. . þ, " â׸Ǣ ", www.thinnai.com/sc1021051.html

kathirk@mxim.com

 

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