My Math Forum  

Go Back   My Math Forum > College Math Forum > Applied Math

Applied Math Applied Math Forum


Reply
 
LinkBack Thread Tools Display Modes
April 5th, 2013, 01:23 AM   #1
Newbie
 
Joined: Apr 2013

Posts: 1
Thanks: 0

Closest Point of Approach (CPA) mathematical formula

Hello guys,

I recently searching for mathematical formula to find closest point of approach (CPA) to be applied to my radar ship program and I can't find the correct ways to calculates it.

anybody know what are the correct formula besides plotting in manually?

any mathematical formula or coding?

thank you very much for anyone that help me. sorry for my bad english.
syamilsynz is offline  
 
April 5th, 2013, 02:08 PM   #2
Global Moderator
 
Joined: May 2007

Posts: 6,398
Thanks: 546

Re: Closest Point of Approach (CPA) mathematical formula

If you have an analytic expression for the distance as a function of time, you could use elementary calculus. This means finding the first derivative and set it equal to 0, etc.
mathman is offline  
April 5th, 2013, 07:36 PM   #3
Senior Member
 
Joined: Aug 2008
From: Blacksburg VA USA

Posts: 338
Thanks: 4

Math Focus: primes of course
Re: Closest Point of Approach (CPA) mathematical formula

okay, I stole data essentially from a post a few back (http://www.mymathforum.com/viewtopic.php?f=27&t=39466
see this next link, it shows sample trajectories you can practice on. As per mathman, they stem from analytical functions, so you can create the "difference" function to differentiate etc.
https://docs.google.com/spreadsheet/...lE&usp=sharing

If the link doesn't work, I'll try to post a PNG
billymac00 is offline  
Reply

  My Math Forum > College Math Forum > Applied Math

Tags
approach, closest, cpa, formula, mathematical, point



Search tags for this page
Click on a term to search for related topics.
Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
Closest point on a the line MFP Calculus 3 August 17th, 2013 08:20 AM
Mathematical analysis: straight forward approach taylor_1989_2012 Math Books 0 September 19th, 2012 02:05 AM
Find the closest point OriaG Calculus 5 September 8th, 2012 04:36 PM
the point through a line closest to the unit circle mad Algebra 3 August 18th, 2010 01:20 PM
Formula For Rotating a Point about another Point ManuLi Algebra 3 August 20th, 2009 03:25 AM





Copyright © 2017 My Math Forum. All rights reserved.