the global positioning system advanced tools l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
The Global Positioning System Advanced Tools PowerPoint Presentation
Download Presentation
The Global Positioning System Advanced Tools

Loading in 2 Seconds...

play fullscreen
1 / 27

The Global Positioning System Advanced Tools - PowerPoint PPT Presentation


  • 289 Views
  • Uploaded on

The Global Positioning System Advanced Tools. Sources of GPS Error. Standard Positioning Service (SPS ): Selective Availability: 0 to 100 meters Ionosphere: 5.0 to 7.0 meters Troposphere: 0.5 to 0.7 meters Satellite clocks: < 1 to 3.6 meters Orbital errors: < 1 meter

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'The Global Positioning System Advanced Tools' - andrew


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide2

Sources of GPS Error

  • Standard Positioning Service (SPS ):
    • Selective Availability: 0 to 100 meters
    • Ionosphere: 5.0 to 7.0 meters
    • Troposphere: 0.5 to 0.7 meters
    • Satellite clocks: < 1 to 3.6 meters
    • Orbital errors: < 1 meter
    • Receiver noise: 0.3 to 1.5 meters
    • Multipath: undetermined
    • User error: Up to a kilometer or more
  • Errors are cumulative!
slide3

Dual Frequency Positioning

L1

C/A Code

L2

P(Y) Code

Signal propagates through atmosphere at different rates due to different frequencies.

This time difference can be calculated and used to correct for Ionospheric and Tropospheric created errors.

post processed differential gps5

Post-Processed Differential GPS

Trimble’s Pro XR

Trimble Geo CE

XT and XM

Trimble GPS Pocket

ndgps n ationwide d ifferential g lobal p ositioning s ervice
NDGPSNationwide Differential Global Positioning Service
  • Advantages:
  • 1 meter, 95% real-time accuracy when the user is within 100 miles of station
  • Optimized for surface (maritime and terrestrial) applications with medium frequency, “ground hugging” signal and is not line-of-site dependent
  • Fully operational in areas of coverage
ndgps n ationwide d ifferential g lobal p ositioning s ervice8
NDGPSNationwide Differential Global Positioning Service
  • Disadvantages:
  • Accuracy degrades at a rate of approximately 1 meter per hundred nautical miles
  • More user equipment needed for most receivers
  • Can be susceptible to RF interference
  • Accuracy and usage are distance dependent
  • System is operational but the coverage not completed yet
gps ndgps beacon system
GPS / NDGPS Beacon System

Trimble’s “BoB”

CSI’s MBX3

Beacon Receiver

waas w ide a rea a ugmentation s ystem
WAASWide Area Augmentation System

Advantages:

  • < 7 meters real-time accuracy
  • Accuracy not distance dependent
  • No additional receiver needed
  • Inexpensive
waas w ide a rea a ugmentation s ystem13
WAASWide Area Augmentation System
  • Disadvantages:
  • Does not work well in canopy cover
  • Satellite are geo-stationary over equator
  • Not declared operational yet
waas beacon omnistar gps receiver system

Garmin

GPSMap 176

Trimble’s Pro XR

Trimble Geo CE

XT and XM

Garmin GPSMap 76 and V

WAAS / Beacon / Omnistar / GPS Receiver System

CSI’s DGPS Max

why should you do differential corrections
Why Should You DoDifferential Corrections?
  • Improved Accuracy ( still have atmospheric degradation of sv signals )
  • Positional Integrity ( Are you where you say you are? )
  • Geodetic Tie to NGS Monumentation Network
what s coming for gps system
What’s Coming for GPS System?
  • Better, smaller and less expensive receivers
  • Closer integration into existing equipment, watches, cell phones, data collection devices, etc.
  • Dual Frequency, C/A Code
  • FAA satellite based differential service - Wide Area Augmentation System, WAAS
  • Double coverage of NDGPS for CONUS
latest gps technology

Garmin

GPSMap 76s

Garmin GPS V

Casio GPS Watch

Trimble GPS Pocket

Latest GPS Technology

Trimble Geo CE

XT and XM

CSI DGPS Max and MiniMax

latest communication technology

Garmin’s

NavTalk GSM

Wireless Phone

Latest Communication Technology

Garmin Rino

FRS / GRSM

Radio and GPS

Reciever

latest communication technology19
Latest Communication Technology

CSI GT300

GPS Enabled Digital

Cell Telephone

Racal Project 25 Voice / Data Radio

handheld mapping
Handheld Mapping

In-the-fielddata collectionand informationdisplay.

Display valuabledata sources

Combine datasets

Query attributeinformation

data collection softwares
Data Collection Softwares
  • Trimble TerraSync
  • ESRI ArcPad
  • Fieldworker
  • TDS Solo CE
  • Various PalmPilot Softwares
minimum suggested handheld requirements august 03
Minimum Suggested Handheld Requirements (August ‘03)
  • Min. 206 Strong Arm chipset
  • 32 Mbs of RAM
  • PC Card (or compact flash) expansion capability
  • Daylight viewable screen!
  • Ruggedized (if possible)
panasonic toughbook 01

Examples:

Panasonic Toughbook 01
  • Panasonic Toughbook 01 (32 Mbs of RAM)
  • Serial AutoSync cable
  • 1 gig IBM Microdrive and / or 512 mb Secure Data card
  • Extra removable battery
  • with charger

Approximate cost: $2000.00

latest gps imaging technology

3D Marketing’s

Photo Link and GPS Tag

Software

Latest GPS Imaging Technology

Trimble’s

Media Mapper

digital camera gps imaging systems
Digital Camera/GPS Imaging Systems
  • Latitude and Longitude
  • Datum
  • Elevation
  • FMSS Facilities information
  • Archeological descriptions
  • Viewing direction
  • I&M database unique identifiers
  • Basically, anything that you want to watermark on photo.