Like Tree0Likes

If the GPS says 85mph, how fast am I going?

Reply
Old 12-16-2005, 09:09 AM
  #21
Registered
 
JS232's Avatar
 
Join Date: Mar 2003
Location: Montreal,Quebec
My Boats: 2004 Baja 275 Boss
Posts: 1,022
Default Re: If the GPS says 85mph, how fast am I going?

Probably somekind of user error?

Maybe He should do his classes and learn how to operate a GPS?
Attached Thumbnails
If the GPS says 85mph, how fast am I going?-jps-copie.jpg  
JS232 is offline  
Reply With Quote
Old 12-16-2005, 09:13 AM
  #22
Registered
 
itilldo's Avatar
 
Join Date: Aug 2005
Location: Hopkinsville, Ky
My Boats: It'll Do - 2004 , 29'--Fountain
Posts: 2,544
Default Re: If the GPS says 85mph, how fast am I going?

Quote:
Originally Posted by dockrocker
Don't forget to account for the orbital speed of the satellite, and since not all GPS satellites orbit at the same rate, you'll need to know:

1. Which satellites you're locked in to,
2. The geospatial relationship between said satellites,
3. The speed of the current,
4. Your lattitude,
5. The airspeed velocity of an unladened swallow,
6. The circumference in centimeters of Pam Anderson's orginal boobs.

At that point, hire Carl Sagan to do the math and Voila! - an accurate reading of your speed.

And people say technology is so hard.


Dockrocker,

You also forgot to mention if it was cloudy or not. This can also directly effect the accuracy of the GPS unit.
itilldo is offline  
Reply With Quote
Old 12-16-2005, 09:17 AM
  #23
Registered
 
JCPERF's Avatar
 
Join Date: Jul 2004
Location: Long Island,New York
My Boats: 10 foot Kayak
Posts: 8,908
Default Re: If the GPS says 85mph, how fast am I going?

Quote:
Originally Posted by GLH
No way that pig you own goes anywhere near 85.

Throw that GPS out.
Give it to Offshoredrillin Rob for Gls run this year
JCPERF is offline  
Reply With Quote
Old 12-16-2005, 09:35 AM
  #24
VIP Member
VIP Member
 
offshoredrillin's Avatar
 
Join Date: Feb 2004
Location: Maryland
My Boats: 00 Cig Tiger,74 Cig 20'
Posts: 10,945
Default Re: If the GPS says 85mph, how fast am I going?

Quote:
Originally Posted by JCPERF
Give it to Offshoredrillin Rob for Gls run this year
I coulda gone faster but I had a big white 1200 hp anchor
offshoredrillin is offline  
Reply With Quote
Old 12-16-2005, 09:47 AM
  #25
Registered
 
PWRCAT's Avatar
 
Join Date: May 2004
Location: Lees summit
My Boats: 1998 eliminator Cat/05' 27 Daytona
Posts: 108
Default Re: If the GPS says 85mph, how fast am I going?

Ok kids, im newer to the forum but lets give people a break and try to help them with the issues they may have. I know if this was my question id want you guys to gather info from me and then give me feedback. Now did the GPS look like this one?? Oh and what river are we on thats important???(oh and why hate LOTO)

PWRCAT is offline  
Reply With Quote
Old 12-16-2005, 10:03 AM
  #26
Registered
 
Game On's Avatar
 
Join Date: Aug 2004
Location: St. Pete, FL
My Boats: Shopping
Posts: 456
Default Re: If the GPS says 85mph, how fast am I going?

Great answers!! Thick skin is a must for this site!!!
Game On is offline  
Reply With Quote
Old 12-16-2005, 10:12 AM
  #27
RHC
Registered
 
RHC's Avatar
 
Join Date: Oct 2002
Location: Sandusky Bay
Posts: 1,375
Default Re: If the GPS says 85mph, how fast am I going?

Come on Nort!!! I looked the answer up for ya!!

1. Was it at the Bar or on the Boat that you were asking about .

2. Were ya in Cali or Loto!!

3. Was the question ask after 3 shots of yagers or before the First one.

4. and the number one question??? Were ya trying to Buy the Boat or Sell the Boat in this conversation ..

These are just some of the factors when reading your GPS unit..

RHC
RHC is offline  
Reply With Quote
Old 12-16-2005, 10:29 AM
  #28
Registered
 
dockrocker's Avatar
 
Join Date: May 2002
Location: Deeee-troit!
Posts: 3,356
Default Re: If the GPS says 85mph, how fast am I going?

The only time Nort's boat has seen 85 has been on the trailer coming downhill from the mountains
dockrocker is offline  
Reply With Quote
Old 12-16-2005, 10:34 AM
  #29
SORE MEMBER
Platinum Member
 
Wobble's Avatar
 
Join Date: Apr 2004
Location: 2950'49.74"N 95 5'17.55"W.......TEXAS
My Boats: SeaDoo RXP & RXP-X, Stryker Equalizer 28, Eliminator Daytona Jet
Posts: 6,705
Default Re: If the GPS says 85mph, how fast am I going?

Quote:
Originally Posted by dockrocker
The only time Nort's boat has seen 85 has been on the trailer coming downhill from the mountains
Thats how I got my best GPS reading
Wobble is offline  
Reply With Quote
Old 12-16-2005, 10:44 AM
  #30
Registered
VIP Member
 
Join Date: Jan 2004
Location: Boca Raton, FL
My Boats: None
Posts: 3,682
Default Re: If the GPS says 85mph, how fast am I going?

First you need to know what the atmospheric pressure was that particular day. Then you must factor in the cubic centimeter displacement of the actual GPS antenna. Triangulate that figure into the relative speed and trajectory of the satellites your GPS was using at that milisecond.

Now, because I know this is pretty involved, I did all this FOR you, and I keep coming up with an actual speed of 85 MPH. So that's the answer.
Edward R. Cozzi is offline  
Reply With Quote
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Meatman
Velocity
19
09-22-2007 08:12 AM
tgersx
General Boating Discussion
1
06-08-2007 06:18 PM
voodoo
Velocity
8
08-06-2003 05:50 PM
kook
General Boating Discussion
1
05-11-2002 11:32 AM
racefever
Mid Atlantic US
8
04-12-2002 02:30 AM



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 11:12 PM.


Copyright 2011 OffShoreOnly. All rights reserved.