Transcript Future Developments of SatRef

Future
Developments
of SatRef
CHAN Siu-bun, SLS/G
21 June 2006
What we have done:
SatRef
 System components:
12 GPS Active Reference Stations
 A Data Centre
 A Control Centre
 A Web Domain

What we have done:
SatRef

Data, Products & Services:

GPS Raw Data Downloading for High
Accuracy Static Positioning

Network-RTK, Single-RTK, DGPS
Correctional Data for Real-time Precise
Positioning

Simple GPS solutions for novice users
What we have done:
SatRef
 A Knowledge Sharing Platform:
Data – geodetic survey data, GPS data
 Information – analysis of the GPS data
 Knowledge – geodetic survey practices,
survey operation user guides, GNSS
positioning technology

What changes we face:
Passive Role of
Geodetic Frameworks
What changes we face: CORS
Prime Objective of CORS –
supports all kinds of positioning activities
Notes:
This slide shows the screen capture of 3rd parties’ website.
It is removed to avoid infringement of copyright.
The website can be accessed at :
http://www.ngs.noaa.gov/CORS/Maps.html
What to change:
SatRef:

From Geodetic Framework

To Positioning Infrastructure

In support of all kinds of positioning
activities
Learn from other
Geodetic Survey Institutes:
 NGS
 IGS
 IAG
 EUREF
 BKG
 NTRIP
National Geodetic Survey, US
(NGS)
Notes: Figure  VISION
removed to
 Everyone can know where he or she
avoid
is and where other things are...
infringement
of copyright
anytime, anyplace.

MISSION

Deliver and evolve the Nation's foundation of reference
for latitude, longitude, height, velocity, shoreline, and
gravity throughout the United States with consistency,
accuracy, timeliness, currency, and easy access to
support public safety, coastal stewardship, economic
prosperity, and environmental well being.
Extracted from : http://www.ngs.noaa.gov/INFO/NGSStratPlan98.html
National Geodetic Survey, US
(NGS)
Notes:
This slide shows the screen capture of 3rd parties’ website.
It is removed to avoid infringement of copyright.
The website can be accessed at
http://www.ngs.noaa.gov/INFO/WhatWeDo.shtml
National Geodetic Survey, US
(NGS)
Notes:
This slide shows the screen capture of 3rd parties’ website.
It is removed to avoid infringement of copyright.
The website can be accessed at : http://www.ngs.noaa.gov/CORS/
National Geodetic Survey, US
(NGS)
Notes:
This slide shows the screen capture of 3rd parties’ website.
It is removed to avoid infringement of copyright.
The website can be accessed at :
http://www.ngs.noaa.gov/products_services.shtml
National Geodetic Survey, US
(NGS)
Notes:
This slide shows the screen capture of 3rd parties’ website.
It is removed to avoid infringement of copyright.
The website can be accessed at :
http://www.ngs.noaa.gov/GRD/GPS/Projects/TEC/
Global Ionosphere Activity Map by AIUB
(Last 7 days observation + 3 days prediction)
Notes:
This slide shows the screen capture of 3rd parties’ website.
It is removed to avoid infringement of copyright.
Original image (http://www.aiub.unibe.ch/ionosphere/gim.gif)
was extracted from AIUB website:
http://www.cx.unibe.ch/aiub/ionosphere.html
International GNSS Service
(IGS)
Notes: Figure
removed to  MISSION
avoid
 The International GNSS Service is
infringement
of copyright
committed to providing the highest
quality data and products as the
standard for Global Navigation Satellite
Systems (GNSS) in support of Earth
science research, multidisciplinary
applications, and education.
Extracted from : http://igscb.jpl.nasa.gov/organization/bylaws.html
International GNSS Service
(IGS)
Notes:
This slide shows the screen capture of 3rd parties’ website.
It is removed to avoid infringement of copyright.
The website can be accessed at :
http://igscb.jpl.nasa.gov/
International GNSS Service
(IGS)
Notes:
This slide shows the screen capture of 3rd parties’ website.
It is removed to avoid infringement of copyright.
The website can be accessed at :
http://igscb.jpl.nasa.gov/components/compindex.html
International GNSS Service
(IGS)
Notes:
This slide shows the screen capture of 3rd parties’ website.
It is removed to avoid infringement of copyright.
The website can be accessed at :
http://igscb.jpl.nasa.gov/components/prods.html
International GNSS Service
(IGS)
Notes:
This slide shows the screen capture of 3rd parties’ website.
It is removed to avoid infringement of copyright.
The website can be accessed at :
http://igscb.jpl.nasa.gov/components/prods_cb.html
International Association
of Geodesy (IAG)
Notes:
This slide shows the screen capture of 3rd parties’ website.
It is removed to avoid infringement of copyright.
The website can be accessed at :
http://www.iag-aig.org/index.php?tpl=text&id_c=12&id_t=173
International Association
of Geodesy (IAG)
Notes:
 Commission 1:
Figure
removed to
 Reference Frames
avoid
infringement  Commission 2:
of copyright


Commission 3:


Gravity Field
Earth Rotation and Geodynamics
Commission 4:

Positioning and Applications
International Association
of Geodesy (IAG)


Commission 1: Reference Frames
The objectives :





The establishment, maintenance, improvement of the
geodetic reference frames.
Advanced terrestrial and space observation technique
development for the above purposes.
International collaboration for the definition and
deployment of networks of terrestrially-based space
geodetic observatories.
Theory and coordination of astrometric observation for
reference frame purposes.
Collaboration with space geodesy/reference frame related
international services, agencies and organizations.
Extracted from: http://www.iag-aig.org/index.php?tpl=text&id_c=1&id_t=145
International Association
of Geodesy (IAG)


Commission 4: Positioning and Applications
The objectives :






Terrestrial and satellite-based positioning systems
development, including sensor and information fusion.
Navigation and guidance of platforms.
Interferometric laser and radar applications
Applications of geodetic positioning using three
dimensional geodetic networks (passive and active
networks), including monitoring of deformations.
Applications of geodesy to engineering.
Atmospheric investigations using space geodetic
techniques.
Extracted from: http://www.iag-aig.org/index.php?tpl=text&id_c=1&id_t=145
EUREF: IAG Ref. Frame SubCommission for Europe
Notes:
This slide shows the screen capture of 3rd parties’ website.
It is removed to avoid infringement of copyright.
The website can be accessed at :
http://www.epncb.oma.be/_dataproducts/index.php
EUREF Permanent Network
Notes:
This slide shows the screen capture of 3rd parties’ website.
It is removed to avoid infringement of copyright.
The website can be accessed at :
http://www.epncb.oma.be/_dataproducts/products/index.php
EUREF Permanent Network

Zenith Delay Path
Notes:
This slide shows the screen capture of 3rd parties’ website. It is
removed to avoid infringement of copyright.
Original image was extracted from EUREF website at:
http://www.epncb.oma.be/_organisation/projects/trop_sp/index.php#
map
Federal Agency for Cartography
and Geodesy, Germany (BKG)
Notes:
This slide shows the screen capture of 3rd parties’ website.
It is removed to avoid infringement of copyright.
The website can be accessed at :
http://www.bkg.bund.de/DE/Home/homepage__node.html__nnn=true
Federal Agency for Cartography
and Geodesy, Germany (BKG)
Notes:
This slide shows the screen capture of 3rd parties’ website.
It is removed to avoid infringement of copyright.
The website can be accessed at :
http://www.bkg.bund.de/nn_858/sid_0B3DC8FB8E95C82BD312771
8D906674B/nsc_true/EN/Home/homepage__node.html__nnn=true
Federal Agency for Cartography
and Geodesy, Germany (BKG)

GREF / EUREF (Germany / European
Reference Network)

Development of NTRIP (Networked
Transport of RTCM via Internet
Protocol)
http://igs.ifag.de/index_ntrip.htm
Federal Agency for Cartography
and Geodesy, Germany (BKG)
Notes:
This slide shows the screen capture of 3rd parties’ website.
It is removed to avoid infringement of copyright.
The website can be accessed at :
http://igs.ifag.de/ntrip/ntrip_caster.htm?SESSID=bf4d4fd944085196
24ebf2df99d0acb2
What is NTRIP?

Networked Transport of RTCM via Internet
Protocol, Version 1.0



Open, generic, non-proprietary application-level
protocol
 Become RTCM standard since Sep 2004
 Communicate between applications, device
independent
Supports “streaming” GNSS data over the
Internet
Support Wireless Internet access through
Mobile IP Networks (e.g. GPRS / 3G / Wi-Fi …)
NTRIP Streaming System
DGPS/RTK GPS Receiver




DGPS/RTK GPS Receiver
NtripClients
COM
COM
 GPS users
NtripClient N
NtripClient 1
 Radio Audience
NtripCaster
HTTP
HTTP
 Centralized hub
NtripCaster
 Radio Website
NtripServers
HTTP
HTTP
 Data provider
 Radio Channel
NtripServer 1
NtripServer M
NtripSources
 GPS streams
NtripSource 1
NtripSource L
 Radio Program
Administration
HTTP / Telnet
Ref:- Weber G (2004) New RTCM Standard on Real Time GNSS
Data Dissemination over the Internet
NTRIP Streaming System
Server
Caster
Client
50...100 x max 5 kbit/s
1000... x max 5 kbit/s



Only 1 “real” Internet Server (NtripCaster)
NtripCaster works as data splitter: mass-usage
No direct communication between provider and user
Using NTRIP

Requirements on Client-side
Hardware: PC / PDA / GPS Receiver
 Software: GNSS Internet Radio

 RTCM

Decoder (for demonstration only)
Need to know:
 Host
address / Port number (usually 80 or
2101)
 Username / Password

Get GPS correction from anywhere !
Using NTRIP

Advantages of using NTRIP


Increase number of potential users significantly
Less investment need for clients



System easily upgradeable



Various client-side software available for free
Integrated NTRIP client interface in GPS equipment
Ready for future wireless network (3G, Wi-Fi, Wi-MAX)
Ready for new Reference Stations, new RTK products,
new satellite sources (GLONASS, Galileo…etc.)
Capable for data sharing


Among the system developers and users
Regional / National / International
Using NTRIP
Demo



GNSS Internet Radio Version 1.4.7
Software by Informatik Centrum Dortmund
http://mms.icd.de
Copyright German Federal Agency for Cartography and
Geodesy (BKG) 2002-2006.
http://igs.bkg.bund.de/index_ntrip.htm for details.
What to do?

Establish as the Key Service Provider on
Precise Positioning
 Anywhere, Anytime, High Precision

Support the Positioning Infrastructure
 Horizontal / Vertical Control network
 Geoid-Ellipsoid Separation Model, Gravity data

GPS/GNSS data + correctional data 
readily available on IP
What to do?

Serve surveying and positioning users
 Making GPS simple to use
 Standards, Guideline
 Sharing Geodetic/GNSS knowledge
 Map
Projection / Datum Transformation
 GPS measurement principles
 GPS Data Processing, Adjustment Strategy
 GNSS
& other positioning techniques
SatRef: Network-RTK Solution
Figure extracted from GNSMART Software Manual
SatRef: Zenith Delay Plot
How Ready is the Technology?
Notes:
This slide shows the screen capture of 3rd parties’ website.
It is removed to avoid infringement of copyright.
The website can be accessed at :
http://www.mobilentrip.com/solutions.htm
Mobile Phone models
in support of NTRIP
Notes:
This slide shows the screen capture of 3rd parties’ website.
It is removed to avoid infringement of copyright.
The website can be accessed at :
http://www.mobilentrip.com/devices.htm
Thank you .