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Blog Entry# 2217695
Posted: Mar 31 2017 (21:07)

13 Responses
Last Response: Apr 02 2017 (00:34)
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Mar 31 2017 (21:07)   RJY/Rajahmundry (5 PFs)
MailguardSG25~
MailguardSG25~   24054 blog posts
Entry# 2217695            Tags   Past Edits
6e 292 crusing near RJY 35000 ft above the ground...Highest attained was around 855 kmph
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Apr 01 2017 (14:48)
Shaurya117^~
Shaurya117^~   7727 blog posts
Re# 2217695-10              
A GPS gives an error of ±10 kmph when a train is running at 100+ kmph. So imagine the GPS error when you are travelling at 800+ kmph and at quite high altitude, where GPS signal gets fainter and fainter.....
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Apr 01 2017 (20:28)
Desiincanada~
Desiincanada~   1274 blog posts
Re# 2217695-11               Past Edits
again not true
gps stands for global position satellite
its basically a satellite receving and sending datas to give us exact location
it will be more accurate at higher altitude rather than on ground bcoz on ground we have so many distrubances like wall,building,roof etc so it solves the purpose,but not very accurate on ground for speed measurements
at
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more...
height of 10km{or 35000ft} there are no obstructions apart from aircraft shell itself,so its more accurate than on ground
i wont say my data was 100% accurate, but as announced in flight that we were flying at mach0.85 at 38000ft, so it was above 1000kmph for sure

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Apr 02 2017 (00:18)
Shaurya117^~
Shaurya117^~   7727 blog posts
Re# 2217695-12              
On most commercial aircraft, you'll have a hard time.There's just not enough window space and the aluminum skin of the aircraft blocks the GPS signals. And if you follow the rules and turn off electronic devices, you'll lose the fix that you had when you had on the ground. This makes it even harder for the GPS to lock.
Most phones will have trouble getting GPS signals without a cell connection since they are designed to rely on the availability of data network assisted GPS most of the time.
And finally, a
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physical altitude limit may not apply on aircraft. However, I believe there's also, interestingly, an intentional technical limit on what most GPSs can do. The reason for this is that the US government doesn't want Iran and North Korea etc to be able to build missiles that use GPS for guidance, so they have mandated that GPS chips should not work at heights or speeds that are clearly in typical range of what aircraft can do.
Hope that's useful.....

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Apr 02 2017 (00:24)
TheDarkLord~
TheDarkLord~   10265 blog posts
Re# 2217695-13              
First, Airbus A320 doesn't go beyond 35,000 feet and don't compare it with A380, that's a super jumbo. Second, Airbus officially declares the max. speed of A320 as 850 km/hr so high probability is there that your GPS is showing some wrong readings+ I have traveled in all India based Airlines with posses A320 and during my journey in Pilot's Cockpit announcement have always heard that Air craft is flying at a speed of 800 km/hr.
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Apr 02 2017 (00:34)
Shaurya117^~
Shaurya117^~   7727 blog posts
Re# 2217695-14              
Yup that's what I am trying to say.
1000+ kmph is most probably a huge GPS error
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