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If you think about it, we require much more precision in vertical measurements. If the GPS gives us lat/long to 150 feet we are amayzed. If our altimiter had this much error we would get it serviced. ATC expects us to hold altitude to less than 100 feet while they will tolerate several hundreds of feet of horizontal error. This is because previous navigation aids were not that good but altimeters are fairly accurate and sensitive. So GPS is unlikely to be very useful for vertical navigations but very useful horizontally. David Abrams Greg Bullough wrote: > I've never really seen satisfactory altitude readings from GPS, though > they're much better since Clinton shut off the built-in errors. > ==^================================================================ EASY UNSUBSCRIBE click here: http://topica.com/u/?aVxiLm.aVzvvT Or send an email To: [EMAIL PROTECTED] This email was sent to: [EMAIL PROTECTED] T O P I C A -- Register now to manage your mail! http://www.topica.com/partner/tag02/register ==^================================================================
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