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IEVref:705-05-41ID:
Language:enStatus: Standard
Term: effective Earth-radius factor
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Symbol: k
Definition: ratio of the effective radius of the Earth to the actual Earth radius

NOTE 1 – This factor k is related to the vertical gradient dn/dh of the refractive index n and to the actual Earth radius a by the equation:

k= 1 1+a dn dh MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaceaaciWacmGadaGadeGabaGaaqaaaOqaaiaadUgacqGH9aqpdaWcaaqaaiGacgdaaeaaciGGXaGaey4kaSIaamyyamaalaaabaGaciizaiaad6gaaeaaciGGKbGaamiAaaaaaaaaaa@3E52@

NOTE 2 – For an atmosphere having a standard refractivity gradient the value of k is taken as 4/3, corresponding to an effective radius of the Earth of approximately 8 500 km.


Publication date:1995-09
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Internal notes:2017-06-02: Cleanup - Remove Attached Image 705-05-41.gif
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