The latest development from Trimble

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The latest development from Trimble

• Vidar Tangen
• 21 October, 2008

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Agenda

• Surveyors perspective
• VRS networks
• Receiver
• Antenna
• Integrated Surveying
• Speculations about the future

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Surveyors perspective

• Get the job done !
• Fast
• Initialization
• Reliable
• No false fix
• Work in any condition
• Solar flares
• Snow, hail, rain
• Cm accuracy
• Control measurements
• Repeated visits ?
• Usability
• Cities
• Forests

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Nordic VRS infrastructure
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Trimble VRS
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VRS Infrastructure in the Nordic countries

• THE most important part of the survey
• GPRS/GSM available
• Trimble GPS Net
• SWEPOS, CPOS, GPSnet.fi, GPSnet.dk
• provide cm accuracy to users
• handle CORS
• ensures highest quality data
• Maintains highest order CP network
• Monitoring
• Deformation analysis
• Long time series (NB ! Antenna)
• No need for local base station

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Price
Trimble NetR8
LatestCORS
NetR5
NetRS
NetR3
Functionality
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Latest CORSTrimble NetR8 - Key Features

• Released during
• ION GNSS 2008
• 4 Power Sources including PoE
• 3x Serial Ports, Ethernet, Lemo, Bluetooth
• Ext. frequency
• 76 channels
• GPS L1, L2, L2C, L5
• GLONASS G1, G2
• SBAS WAAS, EGNOS, MSAS and Omnistar

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Latest GNSS Antennas

• Radome Radar Dome
• Protects receiving element and LNA from sun and
  moisture
• Mounting method
• 5/8-11 Thread

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Characteristics of Satellite Signals
GNSS Frequency Plan
Lower L-Band
Upper L-Band
Lower L-Band
Upper L-Band
ARNS Band
ARNS Band
RNSS Band
RNSS Band
RNSS Band
RNSS Band
Galileo E5B
Galileo E5A
Galileo E1 L1 E2
Galileo E6
GPS L2
GLONASSG2
GLONASSG3 ?
GPS L1
GLONASS G1
GPS L5
1559MHz
1559MHz
1217MHz
1593MHz
1188MHz
1214MHz
1239MHz
1260MHz
1261MHz
1300MHz
1563MHz
1587MHz
1591MHz
1610MHz
1237MHz
1217MHz
1593MHz
1164MHz
1188MHz
1214MHz
1239MHz
1260MHz
1261MHz
1300MHz
1563MHz
1587MHz
1591MHz
1610MHz
1151MHz
1237MHz
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Latest GNSS antenna

• Block Unwanted Signals
• Ground Plane
• Metal Disk
• Blocks signals from below
• Choke Ring
• 1/4 wave trap
• No surface waves
• Zephyr Geodetic mod. 2
• Resistive Ground Plane - Trimble Stealth GP
• Resistance increases from element to outer edge
• Consumes unwanted signals
• GPS L1, L2, L5
• Glonass L1, L2, L3
• Galileo E1, E2, E5, E6
• SBAS WAAS, EGNOS, QZSS, Gagan, MSAS and
  OmniStar

.
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VRS Infrastructure in the Nordic countries

• Future effects
• L5 increases reference station spacing
• More robust signals
• Better suited to handle solar flares
• Better modelling of error sources
• Broader bandwith needed to reference stations
• Additional functionality
• Real time quality control message ?

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Integrated Surveying The Trimble Concept for
combining GNSS and Totalstations
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Complementary systems
Preferred Tasks
Problematic Areas
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Trimble IS Rover
RefStat.
GSM/GPRS/Radio

• Combination of
• Latest GNSS and TS
• Robotic Pole
• GPS Receiver
• Controller

Bluetooth
2.4 GHz Radio
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Trimble Integrated Surveying

• GPS
• Observation of temporary CPs
• In open areas
• During interrupted line of sight
• Not only on TS point

• Combination
• Less station setups
• Direct mutual control
• Guaranteed data integrity
• Homogeneous data file from both sources

• Total Station
• Local control for calibration
• In case of obstructions
• Interrupted correction data link

IS Rover
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Looking ahead

• Getting the job done
• Fast - faster
• Combining 3G will give us instantaneous
  initialization
• (Some scientists say Inst. Ambiguity
  resolution w/L5)
• Reliable more reliable
• L5 improved multipath
• Using complementary survey techniques
• Using independent GNSS systems as
• real time control
• Cm accuracy
• Expected
• Better geometry
• More monitoring stations, thorough analyzis,
  timely adjustments

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Looking ahead

• Getting the job done
• Usability greatly increase !
• A huge (!) amount of available satellites
• Stronger more robust signals (L2C, L5)
• GIOVE-B signals better clocks provide
• higher accuracy in challenging
• environments where multipath
• and interference are present
• GNSS in difficult (impossible) places
• (once initialized, maintain lock)
• New combinations of survey
• techniques (INS)

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Looking ahead

• A glimpse into the future

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Thanks for your attention!