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Python for Secret Agents

You're reading from   Python for Secret Agents Analyze, encrypt, and uncover intelligence data using Python, the essential tool for all aspiring secret agents

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Product type Paperback
Published in Aug 2014
Publisher
ISBN-13 9781783980420
Length 216 pages
Edition 1st Edition
Languages
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Author (1):
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Steven F. Lott Steven F. Lott
Author Profile Icon Steven F. Lott
Steven F. Lott
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Toc

Background briefing – latitude, longitude, and GPS


Before we can get geographic information, we'll need to review some essential terminology. One powerful piece of modern technology that helps civilians as well as secret agents is the Global Positioning System (GPS), a satellite-based system to determine location. The GPS allows a terrestrial device to pinpoint its location in both space and time.

The idea underlying GPS is quite elegant. Each satellite produces a stream of data that includes position and super accurate timestamps. A receiver with multiple streams of data can plug the positions and timestamps into a matrix of simultaneous equations to determine the receiver's position with respect to the various satellites. Given enough satellites, a receiver can precisely calculate latitude, longitude, elevation, and even the current time.

For more information see http://en.wikipedia.org/wiki/Global_Positioning_System#Navigation_equations.

A position's latitude is an angle measured relative...

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