FIG 2007 Overview of Various GNSS Networks Neal Toso Product Marketing Director Leica Geosystems Inc. 2 Agenda Evolution of Reference Stations Motivation for Reference Station Networks Anatomy of a Reference Station Network Importance of Standards Reference Networks World Wide CORS Stations in Latin America Sample of Reference Networks in the USA 3 Reference Station Evolution Base Station Temporary Owner use only High Costs Permanent RS Fixed Private Use Proprietary GNSS CORS Std. Coord Frame Active Control Standard RINEX Network RTK Wide Area RTK Economical Standard RTK 4 Accuracy, Reliability, Availability Good Bad Single Baseline RTK Reference Stations RTK Accuracy Horizontal: 10 mm + 1ppm Vertical: 20 mm + 1ppm 30 km 5 Accuracy, Reliability, Availability Good Bad Networked Reference Stations RTK Accuracy Horizontal: 10 mm Vertical: 20 mm 70 km 6 Anatomy of a Reference Station Network Network Software Communication Links Monumentation GNSS Hardware RTK DATA STANDARDS
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ts05 05 toso 2479 - FIG · 7 Importance of RTK Network Standards RTCM V3.X Corrections for Network RTK 8 Receiving Corrections for Master and Correction Differences for the Auxiliary
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FIG 2007Overview of Various GNSS NetworksNeal TosoProduct Marketing DirectorLeica Geosystems Inc.
2
Agenda
Evolution of Reference Stations
Motivation for Reference Station Networks
Anatomy of a Reference Station Network
Importance of Standards
Reference Networks World Wide
CORS Stations in Latin America
Sample of Reference Networks in the USA
3
Reference Station Evolution
Base StationTemporary
Owner use only
High Costs
Permanent RSFixed
Private Use
Proprietary
GNSS CORSStd. Coord Frame
Active Control
Standard RINEX
Network RTKWide Area RTK
Economical
Standard RTK
4
Accuracy, Reliability, AvailabilityGood Bad
Single Baseline RTK Reference StationsRTK Accuracy
Horizontal:
10 mm + 1ppm
Vertical:
20 mm + 1ppm
30 km
5
Accuracy, Reliability, AvailabilityGood Bad
Networked Reference Stations RTK Accuracy
Horizontal:
10 mm
Vertical:
20 mm
70 km
6
Anatomy of a Reference Station Network
NetworkSoftware
CommunicationLinks
Monumentation
GNSSHardware
RTK DATA STANDARDS
7
Importance of RTK Network Standards
RTCM V3.X Corrections for Network RTK
8
Receiving Corrections for
Master and Correction
Differences for the Auxiliary
Correction Differencesof the Aux. relative to
the Master
RTCM 3.x Master Auxiliary Concept (MAC)One Master Reference Station, plus
Several Auxiliary Reference Stations Equals One Network Cell
Rover
Network Processing Facility
Network Estimation process including Ambiguity Resolution,
forming messages; transmission of Corrections for Master and of
Correction Differences for each Auxiliary.
Auxiliary Reference Station C
Auxiliary Reference Station D
Auxiliary Reference Station B
Master Reference Station A
Auxiliary Reference Station X
9
RTK Network Data Compatibility
10
GPS Reference Stations and Network Installations Leica Networks
California (12)
Hawaii (25)
Portugal (4)Taiwan
Mexico (34)
UK (25)
FloridaJapan (45)
Hong Kong Lands (42)Hong Kong Bridge (47)
New Zealand (20)
India (28)
France(12)
Colombia (8)
Australia (10)
Michigan (67)Michigan (67)
Sweden(46)
S.A. (80)
Georgia (11)
New York DOTAlabama DOTFlorida DOTOregon DOTIndiana DOTArizona HM
LVWVD
New York DOTAlabama DOTFlorida DOTOregon DOTIndiana DOTArizona HM
LVWVD
Texas (25)
Argentina 6
Louisiana
Belgium (57)
Canada (50)
Ireland
11
CORS and Network Stations in Latin America
1Manfra/SaneparBrasil 1GeomatBrasil
1Usina Hidrelectrica de Itaipu, Divisa de engenheria Civil e Arquittetura
1Universidade De Sao Paulo, Escola Politecnica, Depto. De Eng. De Transportes
Brasil1CIW/São CarlosBrasil
1Manfra/UnisinosBrasil1CIW/Geraldo LinsBrasil
1Manfra/UnicempBrasil1CIW/EESCBrasil
1Manfra/ULBRABrasil1CIW/CoplanaBrasil
1Manfra/TeconBrasil1CIW/CopersucarBrasil
1Manfra/EAFABrasil1CIW/CEFETSBrasil
1Manfra/CesumarBrasil4Universidad Nacional de Cuyo, Facultad de Ingenieria, Instituto CEDIAC
Argentina
SitesWhoWhereSitesWhoWhere
12
CORS and Network Stations in Latin America
2Instituto Geografico MilitarUruguay7Comision Nacional del Agua, Subgerencia de Información del Agua
Mexico
1Universidad de PiuraPeru1Comisio Federal de Electricidad, Complejo Hidroelectrico El Cajon
Mexico
1Quimica SuizaPeru3Centro de Investigación Científica y de Educación Superior de ensenada (CICESE), División Ciencias de la Tierra, Departamento de Sismología
Mexico
1PRODAPPPeru4Instituto de Investigacion: Observatorio Vulcanologico y Sismologico de Costa Rica. (OVSICORI)Universidad Nacional (UNA)
Costa Rica
1Municipio de Querétaro, Dirección Municipal de Catastro
Mexico4Instituto de Investigacion: Observatorio Vulcanologico y Sismologico de Costa Rica. (OVSICORI)Universidad Nacional (UNA)
Costa Rica
3Universidad Nacional Autonoma de Mexico - Instituto de Ingeniería -Coordinación de Estructuras y Materiales
Mexico1Acueducto de BogotaColombia
27Universidad Nacional Autonoma de Mexico - Instituto de Geofisica, Servicio Sismológico Nacional
Mexico11IGAC Instituto Geografico Agustin Codazzi)
Colombia
1Junta de Agua Potable y Alcantarillado de Yucatán (JAPAY), Dept. Siststemas de Información Geografica