whats new in gps lusher
TRANSCRIPT
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What’s new in GPS
Duncan ParnellRick Lusher
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Quick Intro
Rick Lusher1-800-353-7392
www.duncan-parnell.com/gps.htmlwww.duncan-parnell.com/support.html
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Quick Survey
Who uses a GPS unit now?What type of equipment/accuracy?Types of software?
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What’s new in GPS
Hardware– New equipment– North Carolina VRS – What it is, how it
works (Not new, but more people are starting to use this)
Software– ArcPad 8 is now out– TerraSync 4.10
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New Equipment -GeoExplorer 2008 Series
Three models: three levels of accuracy
– GeoXH™ handheld—Subfoot (<30 cm) and decimeter(10 cm)*
– GeoXT™ handheld—Submeter– GeoXM™ handheld—1 to 3 meter
High resolution VGA displayBluetooth® and 802.11b/g wireless LAN connectivityWindows Mobile® version 6 operating system with multiple language support1 GB onboard storage plus removable SD/SDHC card storagePowerful 520 MHz processor and 128 MB RAM Rugged handheld with all day battery
*with optional Zephyr™ antenna
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NC VRS (Virtual Reference Station)What is a VRS?
How does it help you out?
First – let’s cover Basic GPS
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Basics
The basic idea behind GPS is to measure our distance from a group of satellites in space, this is accomplished by simply measuring the amount of time that it takes for a radio signal to reach us.
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GPS by Trilateration
Distance D = Speed of light ×Time
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How does GPS get our location?
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Error: Atmospheric Delay
GPS signals are knocked around / delayed as they pass through the atmosphere
Ionosphere
Troposphere
BaseRoverBase
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Types of Differential Correction
In the Field– VRS (around 5
inches with a 2008 GeoXH)
– WAAS/SBAS (sub-meter)
– Coast Guard Beacon(sub-meter)
– Omni-Star
Back in the office– Trimble GPS
Analyst (an extension for ArcGIS)
– Trimble Pathfinder Office
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Concept of Virtual Reference Stations (VRS)
Uses a Network of Reference Stations (ABCD) to create Virtual Reference Stations (VRS)A VRS is created for each user location.
AD
C
B
Rover
Virtual Ref.
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NC Base Station locations
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What is needed to hook up to the VRS?
Hardware– VRS account– GPS receiver (Your accuracy will depend on the
type of receiver)– Cell phone with data plan to connect to VRS
Software– Field
ArcPad or TerraSync
– OfficeArcGIS
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Trimble Yuma17.8 cm touchscreenIntel Atom 1.6 GHz processor32 GB solid state hard driveIntegrated WiFi, Bluetooth, and GPS(2-5M)2 integrated camerasExpressCard slotSDIO slotOutdoor rugged design
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Juno SB/SC
3.5G cellular modem(SC Model)Feature packed, fully integrated solution3 megapixel cameraHigh-sensitivity GPS receiverLong life battery for all-day useLightweight and compact
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Customer Stories
Winning the War on WeedsAn in-depth case study demonstrating the benefits of high-accuracy GPS mapping and navigation in the development of sustainable weed management programhttp://www.trimble.com/mgis/customer_stories.aspx
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One More Thing:
Questions?