NRS Networked Reference Stations

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Leica GPS Spider Setting the Standard for GPS
Networks
Mark Burbidge MRICS MinstCES GNSS Network Manager
Leica Geosystems
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Leica SmartNet Technology

• First 24/7 commercial national GPS network
  correction service for Great Britain
• Available since December 05
• Offering a continuous accurate, reliable, robust,
  traceable and repeatable national GNSS network
  solution, based on a common datum
• Services include RTK DGPS Solutions.
  Available to everyone with a DGPS/RTK receiver
• Internet positioning in the field via Mobile GPRS
  (General Packet Radio Service)

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Leica SmartNet - Reference Stations

• Ordnance Survey (OS) currently have a national
  network of over 90 reference stations called OS
  Net
• Through commercial partnership, OS have provided
  Leica Geosystems with raw data feed from OS Net
• Ordnance Survey (OS) intend to maintain and add
  further stations

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Leica SmartNet Strengthening the Network

• Leica intend to add value with the deployment of
  a further 40 stations
• Leica intend to add value by increasing the
  opportunities for a full GNSS (Global Navigation
  Satellite System) network. Tracking all available
  signals from GPS, GLONASS and the future Galileo
• Strengthening the network increases the survey
  quality while providing redundancy, accuracy,
  density and reliability

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Leica SmartNet - Reference Station Comms

• Receiver Communication
• NTRIP raw data feed from OS Net
• Direct Serial
• Modem, Analog or ISDN
• TCP/IP (LAN, Internet, NTRIP)

• Receiver Types
• Leica System 500
• Leica System 1200
• 3rd party receivers and raw data formats

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Leica SmartNet Spider Network Software

• Using an array of reference stations
• Real time Network processing
• Powerful zero-difference algorithm
• Master Auxiliary Concept (MAC) Providing Network
  RTK Corrections in Standard RTCM V3.0 Format
• Modelled Corrections together with a traceable
  set of multiple reference stations
• CM RTK accuracy
• Sub metre DGPS

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Leica SmartNet Network RTK

• Increased Coverage
• Improved availability
• Best Reliability
• Faster Rover initialisations
• Consistent high accuracy
• Higher productivity
• No local base station required
• Working on a common datum

B E N E F I T S
Arrive on site, switch on and start working!
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Leica SmartNet Network RTK Corrections

• SpiderNET Corrections - MAX
• Network RTK Standard RTCM 3.0 Format with Leica
  Master-Auxiliary concept
• Ideal for broadcast transmission
• For Rover to achieve best performance
• Optimised bandwidth to minimise transmission cost
• Always best cell of fixed network sites.
• Automatic reselection when rover moves away

• Communication
• Mobile Internet GPRS
• GSM Access Router
• Landline Wireless
• TCP/IP
• NTRIP Caster Server

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Leica SmartNet Network RTK Corrections

• SpiderNET Corrections i-MAX
• i - Individualsed Network RTK
• Optimised for each rover location
• Provided in standard baseline RTK formats (RTCM
  V2.3, Leica)
• Ideal for legacy receivers that cannot use MAX
• Always best cell of fixed network sites
• Automatic reselection when rover moves away

• Communication
• Mobile Internet GPRS
• GSM Access Router
• Landline Wireless
• TCP/IP
• NTRIP Caster Server

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Network Transmission Concept

• One Master Reference Station
• Some Auxiliary Reference Stations ? One Network
  Cell

Auxiliary Reference Station D
Auxiliary Reference Station C
Auxiliary Reference Station X
Auxiliary Reference Station B
Master Reference Station A
Network Processing Facility
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Leica SmartNet Network DGPS Corrections

• SpiderNET Corrections DGPS
• Provided in standard RTCM 9, 2 v2.3 formats
• Ideal for many DGPS devices

• Communication
• Mobile Internet GPRS
• GSM
• Landline Wireless
• TCP/IP
• NTRIP Caster Server

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Leica SmartNet Control Centre Support

• Real time view of Rover user access
• Field support for users anywhere in the network
  (GB)
• Complete Rover status monitoring

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Independent SmartNet Quality Monitoring
In addition, Leica have partnered with the
internationally recognised Institute of
Engineering Surveying and Space Geodesy at the
University of Nottingham IESSG will provide an
exclusive and independent Quality Assurance
service, adding additional value and security to
subscribed users of SmartNet
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Safe, Secure, Reliable Infrastructure

• Leica SmartNet servers are located at a high
  security, co-location data centre in London
  Docklands
• Secure RTK Service access control
• Name Password via GPUID
• Telephone number
• TCP/IP address
• NTRIP Authentication
• Full system redundancy with backup servers are
  located at the data centre
• Full mechanism to seamlessly switch to a backup
  system is immediate. Plus on-site
  support/monitoring

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SmartNet Website - Available May

• Active map of stations
• Rinex downloads
• Raw data coordinate processing facility to
  nearest reference stations
• Customer testimonials

• Station information health
• Network Quality Monitoring
• Nottingham University QA link
• GNSS QC Quality Assurance
• Customer testimonials

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New GNSS Receiver - GPS GLONASS

• Add Glonass to the worlds best-performing GPS
  system
• Reduce downtime and benefit from higher
  productivity
• Rise to the next level with GNSS SmartTrack
  SmartCheck
• Includes L2C
• New Phase Multipath Mitigation Technology
• 1200 models upgradeable
• Upgrade paths to future GPS L5 Galileo signals
• 72 Channel receiver
• Future Proof technology!

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Leica SmartNet Positioning Services
GPS Monitoring
Building Construction
Utilities Sector
Precise Vehicle Tracking
Port Operations
Emergency Services
Machine Control
Land Surveying
Agriculture
Plus much more business opportunities for end
users
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Finally - How much does SmartNet Cost?
Stand Offer 1 month free (13 months
subscription)Annual Subscription CostRTK
Low rate user (40hrs p/m) 1,200RTK Unlimited
access 2,000DGPS Low rate user (40hrs
p/m) 350DGPS Unlimited Access 750Multiple
user discounts availableGPRS Comms
CostsTypical contract for 250mb 20-25
p/m(more than enough for 7 days a week
surveying)Web Site Rinex Download1 sec
Negotiable15/30 sec FOC
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Leica GPS Spider Setting the Standard for GPS
Networks
Thank You