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iGage iG9 User Manual
Short baselines ‘Fix’ more easily and have sub
stantially less noise.
#13 Fresnel Zone Considerations
Most GPS users think of the radio path from their receiver to each of the satellites is like a small
laser beam. This is incorrect.
The GPS beam width is spread out in a cigar shaped area known as the
‘
Fresnel Zone
’.
Fresnel is pronounced with a silent-s:
”
Frenel
”
, named after French physicist Monsieur Fresnel.
Wikipedia has an excellent article on the Fresnel effect:
https://en.wikipedia.org/wiki/Fresnel_zone
be sure to check out
the section on ‘Fresnel Zone Clearance’ mid
-article.
