Tracking of people vehicles packages or animals Review Range Distance of GPS

Tracking of people vehicles packages or animals

This preview shows page 51 - 54 out of 58 pages.

Tracking of people, vehicles, packages, or animals Review Range Distance of GPS refers to: o Distance between GPS receiver and satellite Which is NOT true for Differential Correction o Uses data from only one GPS receiver o True – Uses data from two or more receivers Removes positional errors Uses Base Stations to calculate range errors 4/18 – Basics of Remote Sensing What is Remote Sensing? Most broadly about being able to detect information about an object without being in physical contact with it Data are typically collected from aircraft or satellites Collects information within the instantaneous-field-of-view (IFOV) of the sensor system The sensor is located on a suborbital or satellite platform Remote Sensing Applications Monitor land use, wetlands, and wildlife habitats Map coastal features- monitor shoreline changes Monitor ocean circulation and current systems Track hurricane, earthquakes, erosion, and flooding And many more Key Elements
Image of page 51
GEOG 379 Lecture Notes Four key elements of Remote Sensing – o Platform to hold the instrument o Instrument or a sensor to observe the target o Target object to be observed o Information that is obtained from the acquired data, and how it is used and stored Types of Satellites Two most common types based on their orbits – o Geostationary Satellite: always above the same location and travels from west to east along with earth o Polar-orbiting Satellite: can scan the entire globe and travels in north-south direction from pole to pole Major Categories of Remote Sensing Based on how the sensor collects data – o Active System: collects data by actively sending out signals/lights o Passive System: collects data by passively receiving data from reflection or radiation Active System Radar: sending out radio signals o Frequently used in the atmospheric sciences, including meteorology o Shuttle Radar Topography Mission (SRTM) generated a comprehensive elevation database of the planet Sonar: Emits sound waves and measure their return through the water o Oceanographer use Sonar to create bathymetry datasets for the Ocean LIDAR: (Light Detection And Ranging) o Emits beams of light and measures their return o Often mounted to aircraft and used to produce detailed topographic datasets Passive System Have no signal or light emitter Collect electromagnetic radiation that has been reflected from some other source, very often the sun Atmospheric errors can be a problem Most of the earth-observation satellite systems are passive systems Electromagnetic Spectrum Electromagnetic radiation from a surface is either a reflection (reflected light) or an emission (radiation emitted from the surface itself) The human eye can only perceive radiation within a limited range of the electromagnetic spectrum Remote sensing represent an extension of our visual field Four Kinds of Resolutions
Image of page 52
GEOG 379 Lecture Notes Four kinds of resolutions dictate the quality of remotely sensed data – o Spatial Resolution
Image of page 53
Image of page 54

You've reached the end of your free preview.

Want to read all 58 pages?

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes