gnss network - cors
DESCRIPTION
Gnss Network - CorsTRANSCRIPT
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GNSS Network - CORSSolusi GNSS Network - Reference Stations
Oleh :
Yulianto Dwi Prasetyo Aptnh MH
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Pendidikan dan LatihanPengukuran dan Pemetaan
Badan Pertanahan Nasional RIBogor, 14 – 27 Maret 2011
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2 Leica Networked Reference Stations
GPS SPIDER – Reference Station
GPS SPIDER : Suatu integrasi software dan Hardware untuk
Mengontrol dan mengoperasikan satu receiver GPS
ataupun beberapa receiver GPS dalam suatu Network.
Cotinuously Operating GPS Reference Station (CORS) :
- Fully Control GPS Receiver
- Network RTK (SpiderNET)
- Logging Raw, Rinex, dan Event log data
- Internet/FTP data push
- User management
- Remote connections
- Support GSM/GPRS services
Komunikasi Receiver GPS :
- Direct Serial (RS232)
- Modem, Analog atau ISDN
- TCP/IP (LAN, Internet, NTRIP)
On The Job TrainingPengukuran Dasar
Kanwil BPN Prop Nusa Tenggara Barat21 Februari – 3 Maret 201
Pendidikan dan LatihanPengukuran dan Pemetaan
Badan Pertanahan Nasional RIBogor, 14 – 27 Maret 2011
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3 Leica Networked Reference Stations
GPS Network Design
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On The Job TrainingPengukuran Dasar
Kanwil BPN Prop Nusa Tenggara Barat21 Februari – 3 Maret 201
Pendidikan dan LatihanPengukuran dan Pemetaan
Badan Pertanahan Nasional RIBogor, 14 – 27 Maret 2011
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4 Leica Networked Reference Stations
GPS Network - Aplikasi
Geodetic Control Surveying Engineering Konstruksi Monitoring Deformasi GIS & Mapping Mining Positioning Machine Control Navigasi Survey Hidrografi Aerial Survey
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On The Job TrainingPengukuran Dasar
Kanwil BPN Prop Nusa Tenggara Barat21 Februari – 3 Maret 201
Pendidikan dan LatihanPengukuran dan Pemetaan
Badan Pertanahan Nasional RIBogor, 14 – 27 Maret 2011
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Network RTK Strategy
MAC – The Master Auxiliary Concept
Leica joint proposal pada tahun 2001
tentang RTCM Messages untuk Network RTK (co-author Gerhard Wuebbena, Geo++)
Menggunakan Informasi dari Network
Reference Station - RTCM V3.0
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On The Job TrainingPengukuran Dasar
Kanwil BPN Prop Nusa Tenggara Barat21 Februari – 3 Maret 201
Pendidikan dan LatihanPengukuran dan Pemetaan
Badan Pertanahan Nasional RIBogor, 14 – 27 Maret 2011
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Leica GNSS Reference Stations Single Reference Station
Provides Real Time Kinematic corrections to Rovers
< 30 km
Limitations: Resources – Equipment Costs; Staff; Planning…
Performance – Range; Reliability; # Users; Comms Type
Using carrier phase observations GPS Rover receivers equates to RTK accuracy of 10mm + 1PPM
At 30 Km : accuracy of 40mm ; 4cm ; 0.040 m with 99.99% confidence
Using Code only Range of 200Km: accuracy of <1m
< 200 km
On The Job TrainingPengukuran Dasar
Kanwil BPN Prop Nusa Tenggara Barat21 Februari – 3 Maret 201
Pendidikan dan LatihanPengukuran dan Pemetaan
Badan Pertanahan Nasional RIBogor, 14 – 27 Maret 2011
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7
RTK With Radio
On The Job TrainingPengukuran Dasar
Kanwil BPN Prop Nusa Tenggara Barat21 Februari – 3 Maret 201
Pendidikan dan LatihanPengukuran dan Pemetaan
Badan Pertanahan Nasional RIBogor, 14 – 27 Maret 2011
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Accuracy, Reliability, AvailabilityGood Bad
Leica GNSS Reference Stations Single Reference Station
‘Average‘ Ionospheric conditions
On The Job TrainingPengukuran Dasar
Kanwil BPN Prop Nusa Tenggara Barat21 Februari – 3 Maret 201
Pendidikan dan LatihanPengukuran dan Pemetaan
Badan Pertanahan Nasional RIBogor, 14 – 27 Maret 2011
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Accuracy, Reliability, AvailabilityGood Bad
Leica GNSS Reference Stations Network of Single Reference Station
‘Average‘ Ionospheric conditions
On The Job TrainingPengukuran Dasar
Kanwil BPN Prop Nusa Tenggara Barat21 Februari – 3 Maret 201
Pendidikan dan LatihanPengukuran dan Pemetaan
Badan Pertanahan Nasional RIBogor, 14 – 27 Maret 2011
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Accuracy, Reliability, AvailabilityGood Bad
Leica GNSS Reference Stations Network of Single Reference Station
‘Average‘ Ionospheric conditions
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Accuracy, Reliability, AvailabilityGood Bad
Leica GNSS Reference Stations Network of Single Reference Station
‘Average‘ Ionospheric conditions
< 70Km
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NTRIP - Streaming Data GPS Melalui Internet
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GNSS ROVER
Leica Networked Reference Stations
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15 Leica Networked Reference Stations
“Networked Transport of RTCM via Internet Protocol” (NTRIP) merupakan suatu protocol aplikasi untuk streaming (alur data) Global Navigation Satellite System (GNSS) melalui Internet.
NTRIP merupakan suatu turunan, stateless protocol berdasarkan Hypertext Transfer Protocol HTTP/1.1. Peningkatan object HTTP menjadi GNSS data streams.
NTRIP di desain untuk mengirimkan data koreksi differential (mis : pada RTCM-104 format) atau tipe lain dari GNSS data streaming kepada stationary atau mobile user melalui Internet, support untuk semua PC, Laptop, PDA, atau receiver yang terkoneksi dengan suatu broadcasting host.
NTRIP support wireless Internet access menggunakan Mobile IP Networks seperti,GSM, GPRS, EDGE, CDMA atau UMTS.
Developed by Bundesamt für Kartographie und Geographie (BKG )
NTRIP – Overview (1)
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On The Job TrainingPengukuran Dasar
Kanwil BPN Prop Nusa Tenggara Barat21 Februari – 3 Maret 201
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16 Leica Networked Reference Stations
NTRIP Overview (2)
NTRIP terbagi atas 3 system software components:
NTRIPClients,
NTRIPServers
NTRIPCasters
NTRIPCaster adalah actual HTTP server program sedangkan NTRIPClient dan NTRIPServer berlaku sebagai HTTP clients.
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17 Leica Networked Reference Stations
NTRIP Overview (3)
Didasari oleh HTTP data streaming standard dan sangat mudah untuk di implementasikan dalam kondisi limited client dan server platform resources yang tersedia.
Aplikasinya tidak terbatas pada satu jenis data streaming yang dibawa; mampu untuk mendistribusikan beberapa jenis GNSS data.
Potensial untuk mensupport penggunaan secara massal; mampu mengirimkan ratusan data streams secara bersamaan hingga ribuan user ketika ketika menjalankan Internet Radio broadcasting software.
Mampu streaming data kepada beberapa mobile IP network karena menggunakan TCP/IP.
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18 Leica Networked Reference Stations
GNSS Internet Radio- Tools untuk alur data/streaming
Merupakan NTRIP client for windows
Available dan free di internet: http://igs.ifag.de/index_ntrip.htm
Digunakan untuk meng-konfigure GPS SPIDER
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19 NRS Technical Training September 3-5, 2008, Heerbrugg CH19
GNNS SpiderNet - Realisation of MACMaster-Auxiliary Corrections (MAX) – RTCM standardized
Leica MAX RTCM V3.1 Network RTK
Based on Master-Auxiliary Concept Simplex (e.g. Radio modem) or duplex
communicationsRTK Proxy ServerRTK Data distribuiton
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MAX Corrections
1. Transmission of raw observation data from the reference stations to the network processing facility.
2. Network estimation process including ambiguity resolution to reduce the stations to the common ambiguity level.
3. (Optional) NMEA GGA position received from the rover at the network processing facility. The most appropriate reference stations are chosen for the rover based on its location.
4. Formation and transmission of RTCM 3.0 network message using corrections for the Master station and correction differences for the auxiliary stations.
5. Computation of high accuracy rover position using the full information from the reference network.
Network Processing Facility
Auxiliary Reference Station A
Auxiliary Reference Station B
Auxiliary Reference Station C
Auxiliary Reference Station D
Master Reference Station
1.
2.
3.4.
5.Rover User
On The Job TrainingPengukuran Dasar
Kanwil BPN Prop Nusa Tenggara Barat21 Februari – 3 Maret 201
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2121 NRS Technical Training September 3-5, 2008, Heerbrugg CH21
Transmits raw data of master and ambiguity levelled correction differences for up to 32 auxiliary sites
Fully standardised format and content defined in RTCM 3.1
Works in two way and broadcast mode
All relevant information available to the rover
Rover algorithm able to use the data in an optimal way, including multi-base positioning, non-fixed satellites and even fall back to single base RTK
Slightly higher bandwidth usage (depends on cell size)
GNNS SpiderNet - Realisation of MACMaster-Auxiliary Corrections (MAX) – RTCM standardized
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22 NRS Technical Training September 3-5, 2008, Heerbrugg CH22
GNNS SpiderNet - Realisation of MACIndividualized Master-Auxiliary Corrections (i-MAX)
Leica i-MAX Individualised corrections
Support for earlier model rover receivers RTCM V2.x, V3.0 baseline format Duplex communication required
RTK Proxy ServerRTK Data distribuiton
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i-MAX Corrections
1. Transmission of raw observation data from the reference stations to the network processing facility.
2. Network estimation process including ambiguity resolution to reduce the stations to the common ambiguity level.
3. NMEA GGA position received from the rover at the network processing facility. The most appropriate reference stations are chosen for the rover based on its location. The master station is chosen as the reference station closest to the rover.
4. Leica GPS Spider calculates the network corrections for the rover and applies them to the observations from the master station.
5. Formation and transmission of RTCM 2.3 or Leica format corrections from the master station.
6. Computation of high accuracy rover position using the reference network.
Network Processing FacilityAuxiliary Reference
Station A
Auxiliary Reference Station B
Auxiliary Reference Station C
Auxiliary Reference Station D
Master Reference Station
1.
2.
3.5.
6.Rover User
4.
On The Job TrainingPengukuran Dasar
Kanwil BPN Prop Nusa Tenggara Barat21 Februari – 3 Maret 201
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2424 NRS Technical Training September 3-5, 2008, Heerbrugg CH24
GNNS SpiderNet - Realisation of MAC
Transmits computed data that is referenced to a real reference station
Uses commonly understood single base formats
Compact data transmission
Content of messages not standardised (in particular use of a priori troposphere model)
Requires two way communications
Network information is lost (not all relevant information is available to the rover)
Individualized Master-Auxiliary Corrections (i-MAX)
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25 Leica Networked Reference Stations
Koreksi MAX pada cell
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26 Leica Networked Reference Stations
Koreksi MAX pada cell
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27 Leica Networked Reference Stations
Koreksi MAX pada cell
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28 Leica Networked Reference Stations
Koreksi MAX pada cell
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29 Leica Networked Reference Stations
Koreksi Auto-MAX
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30 Leica Networked Reference Stations
Koreksi Auto-MAX
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31 Leica Networked Reference Stations
Koreksi Auto-MAX
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32 Leica Networked Reference Stations
Koreksi Auto-MAX
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33 Leica Networked Reference Stations
i-MAX corrections
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34 Leica Networked Reference Stations
i-MAX corrections
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35 Leica Networked Reference Stations
SITE SERVER – File Product Services (FPS)
Format Data :
GPS Raw data
RINEX (dari data stream atau hasil download MDB files)
Hatanaka (compact RINEX)
Quality Check
Online RawData status
Akses Data file : Local pada PC atau Network server
Global via Intranet
atau Internet-FTP
Status Information: via E-Mail
Logfile-Archive & FTP
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36 Leica Networked Reference Stations
GPS SpiderNET – Real Time User Management
Authentication & Authorisation :
GPUID NMEA message
Telephone number (menggunakan access router)
IP Adress
NTRIP authentication
Accounting & Auditing:
Aktifitas Logging GPS rover
Detailed Log files (*.xml)
General Summary Log files (*.txt, machine readable)
Display real time GPS rover - user status
Graphical map
Report view table
RTK Proxy ServerRTK Data distribuiton
GPS SpiderNET
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37 Leica Networked Reference Stations
Ethernet
GPS SpiderNET – Architecture Overview
Site Server
user2
Remote Control
FTP Data push
RC
FTP
FD File & Raw Data
Data Archive
RC
FD
Site Server
user2
RC
FD
Cluster Server(Network Processing)
Cluster Server2(Network Processing)
Network Server
RTK Proxy ServerRTK Data distribuiton
Remote GUIGraphical
User Interface
P W R
O K
W IC 0A C T /C H 0
A C T /C H 1
W IC 0A C T /C H 0
A C T /C H 1
E T HA C T
C O L
Access Router
RTCM V2.3 DGPSNearest Site
MAXAuto-Cell
i-MAXRTCM
NTRIPi-MAX - RTCM
Ntrip / CMR+SingleSite
TCP/IPMAX Auto-Cell
On The Job TrainingPengukuran Dasar
Kanwil BPN Prop Nusa Tenggara Barat21 Februari – 3 Maret 201
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38 Leica Networked Reference Stations
GPS SPIDER Interface
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39 Leica Networked Reference Stations
GPS SPIDER – Virtual Rover
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40 Leica Networked Reference Stations
SPIDER
Server
Choke Ring
Antenna
Meteosensor
GPS Receiver
RTK/PP
Proxy Server
Choke Ring
Antenna
Meteosensor
GPS Receiver
Choke Ring
Antenna
Meteosensor
GPS Receiver
Modem link
Konfigurasi Jaringan
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Data Centre – GNSS Service Provider
Secure Local Network
Data Consumer
NTRIP Connection DMZ
RTK Proxy Server
Web Server
FTP Server
WWW
Site Server Network Server
On The Job TrainingPengukuran Dasar
Kanwil BPN Prop Nusa Tenggara Barat21 Februari – 3 Maret 201
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Leica Networked Reference Stations
Sensors Leica System 1200+ GRX1200+ GNSS Reference Station Receiver
L1 Accuracy: 0.2mm (Phase), 2cm (Code) RMS
L2 Accuracy: 0.2mm (Phase), 2cm (Code) RMS
Operating Conditions
Temperature: -40°C to +65°C
Humidity: Up to 100%
Water: Waterproof to 1m
Features
L1/L2/L5, 120 channel GPS/GLONASS, GALILEO ready receiver
Lower cost than RTK unit
Real time correction data in all standard formats
Dual power input
Remote control with GNSS Spider software
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Antenna
Leica Networked Reference Stations
AR25 3D choke-ring antenna
For first-order networks, IGS stations and primary control
GPS/GLONASS/Galileo/Compass/SBAS
Built to last
Dorne & Margolin element
For data of highest quality
Desained for all wather
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44 Leica Networked Reference Stations
GNSS SPIDER Software Interface
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45 Leica Networked Reference Stations
On The Job TrainingPengukuran Dasar
Kanwil BPN Prop Nusa Tenggara Barat21 Februari – 3 Maret 201
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Communication Link
Leica Networked Reference Stations
Base Station comm
Dibutuhkan jalur komunikasi data yang realible (less noise)
24/7 day
Tidak dibutuhkan koneksi yang cepat (broadband) tetapi stabil dengan latency dibawah 1 second
Private network
Rover Station comm
Memiliki fitur minimal GPRS
Coverage area yang luas
Memiliki kestabilan tinggi
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Parameter GPRS (berbeda tiap operator)
APN :indosatgprs Username :indosatgprs Password :indosatgprs
APN :telkomsel Username :wap Password :wap123
APN :www.xlgprs.net Username :xlgprs Password :proxl
Leica Networked Reference Stations
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Parameter Server
IP: 118.97.67.107 Port:2001 Mountpoint:Max_BPN1_RTCM3.1
iMax_BPN1_RTCM3.1
Username :leica4mePassword :leica4me
Leica Networked Reference Stations
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USAUSAMontreal, Montreal,
CanadaCanada
Moscow, RussiaMoscow, Russia
LatviaLatvia
GNSS Reference NetworksGround Segment - Infrastructure
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Hong KongHong Kong
MacauMacau
BeijingBeijing
GNSS Reference NetworksGround Segment - Infrastructure
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Real Time Network
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Ordnace Survey Network, UK
http://smartnet.leica-geosystems.co.uk
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Jaringan Referensi Satelit PertanahanBPN Se-Jawa Bali
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Terima Kasih
Leica Networked Reference Stations