CORS “Latpos” Multipurpose State Geodetic Network

CORS “LatPos” multipurpose State geodetic network

Asoc.prof. Dr.sc.ing. Jānis Zvirgzds

United Nations / Argentina Workshop on the Applications of Global Navigation Satellite Systems CONAE, Falda del Carmen, Argentina 19 – 23 March, 2018 Outline

• LatPos base stations and coverage • LatPos applications • LatPos field tests on stability • Future plans • Innovative solutions in Geomatics

United Nations / Argentina Workshop on the Applications of Global Navigation Satellite Systems 2 CONAE, Falda del Carmen, Argentina 19 – 23 March, 2018 Latvia located in North of Europe

United Nations / Argentina Workshop on the Applications of Global Navigation Satellite Systems 3 CONAE, Falda del Carmen, Argentina 19 – 23 March, 2018 LatPos Base stations 25

Valka Mazsalaca Valmiera1 Irbene Aluksne Limbazi Palsmane Talsi Sigulda Balvi Lode Kuldiga1 Tukums Chockering Liepaja1 Ojārs Madona Antennas Lielvarde Saldus1 Dobele1 Rezekne1 Jekabpils1 Bauska Preili Dagda

LatPos base stations Daugavpils1

United Nations / Argentina Workshop on the Applications of Global Navigation Satellite Systems UPS for 4 CONAE, Falda del Carmen, Argentina 19 – 23 March, 2018 48 hours LatPos Base stations

25 + 5 + 5 UGA1 TOR2

United Nations / Argentina Workshop on the Applications of Global Navigation Satellite Systems 5 CONAE, Falda del Carmen, Argentina 19 – 23 March, 2018 LatPos cluster layout

UGA1 TOR2

VOR2 IKLA RUHN Valka Mazsalaca Valmiera1 Irbene Aluksne Limbazi Palsmane Talsi Sigulda Balvi Lode Kuldiga1 Tukums Liepaja1 Ojārs Madona Lielvarde Saldus1 Dobele1 Rezekne1 Jekabpils1 Bauska MAZK Preili JNSK BIRZ Dagda KRTN RKSK LatPos bāzes stacijas Daugavpils1 Kaimiņvalstu bāzes stacijas Base stations 25 + 5 + 5 United Nations / Argentina Workshop on the Applications of Global Navigation Satellite Systems 6 CONAE, Falda del Carmen, Argentina 19 – 23 March, 2018 LatPos received GNSS signals

UGA1 TOR2

VOR2 IKLA RUHN Valka Mazsalaca Valmiera1 Irbene Aluksne Limbazi Palsmane Talsi Riga Sigulda Balvi Lode Kuldiga1 Tukums Liepaja1 Ojārs Madona Lielvarde Saldus1 Dobele1 Rezekne1 Vaiņode Jekabpils1 Bauska MAZK Preili JNSK BIRZ Dagda KRTN RKSK LatPos base stations Daugavpils1 Estonian and Lithuanian base stations IGS RIGA All = GPS+GLO Aluksne,Irbene = GPS+GLO+GAL G0 base station Ojars, Dagda, Vainode = GPS+GLO+GAL+BDS Riga = GPS+GLO+GAL+BDS7

LatPos RTK corrections:

SITE LatPos provides:

Source: Janssen, V and Haasdyk, J and McElroy, S (2011) Network RTK: Same look and feel... only better. Position (56). pp. 20-24. ISSN 1447-2635 8 LatPos applications Decimeter level - Forestry

Source: Ogre municipality - Collect data about trees (type, age, hight - Survey cutted down areas - Syrvey disaster areas

United Nations / Argentina Workshop on the Applications of Global Navigation Satellite Systems 9 CONAE, Falda del Carmen, Argentina 19 – 23 March, 2018 LatPos applications

Centimeter level

- Topography - Cartography

- Cadaster

- Finished construction measurements - (example – electric cables)

1 0 LatPos applications

Centimeter level - Road construction - Marine surveying

Road construction

Underwater scanning

-River bottom mapping 1 -Search for sinked Ships 1 LatPos applications Centimeter level - Precise Agriculture

Seeding With 2cm Precise Chemical Distribution Remote sensing With RTK Drone

1 2 LatPos applications

Millimeter level - Maintenance of State Geodetic Network

State Geodetic Network Benchmark - Continental drift and Geology - EUREF Network

Data Time series

EUREF Network From Year 2005 1 3 LatPos applications

- Wather, Water Wapour

- Scientific Applications – with VLBI

GNSS and Irbene 32 m Telescope 16m Telescope 1 32m Telescope 4 LatPos operational tests

1. Time to FIX (distance to base station, data transmission) 2. Initialization repeatability 3. RTK stability in time period 4. Post processing data (not in this presentation)

5. Measurements done at State Geodetic Network Benchmarks.

State Benchmark Syrveyors at work 1 5 LatPos operational tests Test Areas UGAL TOR2

IKLA VOR2 RUHN Valka Mazsalaca Valmiera Irbene Alūksne Limbaži Palsmane Talsi Sigulda Balvi Lode Kuldīga Tukums Liepāja Ojārs Madona Lielvārde Saldus Dobele Rēzekne Vaiņode Jēkabpils MAZK Bauska Preiļi JNSK Dagda KRTN BIRZ RKSK Test Year Daugavpils 2014 2015

2016 1 6 LatPos operational tests

• Year 2017 • G2 point Snikeri

1 7 LatPos operational tests

G2 Sniķeri RTK time to FIX 18

seconds 10

8 to to FIX

Time

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 SITE (") MAX (") IMAX (") VIRTUAL-RS (") 1 8 LatPos operational tests

404340.020 Sniķeri G2, xy LKS92 Separate FIX solutions

SITE (") MAX (") IMAX (") VIRTUAL-RS (") VĢTDB

404340.010 27 mm

13mm 1 cm

404340.000

x y H Average 374437,606 404340,358 80,626 Min 374429,829 404338,624 80,217 Max 374437,994 404352,720 80,6531 404339.990 9 374437.97 374437.98 374437.99 Max374438-Min 8,165374438.01 14,096 0,436 LatPos operational tests

- Separate fixation - Fix solution obtained about 15 meters from benchmark

Sniķeri G2, Height repeatability – separate FIX

SITE MAX IMAX VIRTUAL-RS VĢTDB

80.98

80.96

80.94

80.92

80.9

80.88 2 cm 80.86

80.84 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

- Measurement count - Time span – more than one hour 2 0 LatPos operational tests

1 hour Session x Sniķeri G2

374437.995 2cm

374437.975 x VĢTDB y Sniķeri G2

404340.008

404339.988 y VĢTDB H Sniķeri G2

80.960 5 cm 80.910

80.860 H VĢTDB 2 1 LatPos operational tests

RMS improvements

Year, Point σ x, m σ y, m σ H, m

2014, G2 Valteri 0,011 0,007 0,019

2015, G1 Rūjiena 0,011 0,007 0,021

2016, G2 Vižuļi 0,006 0,005 0,013

2017, G2 Sniķeri 0,008 0,006 0,016

2 2 LatPos Live View - Are User name already used? - Rover has been connected to LatPos? - Supervisors – better work planning!

2 LOG file picture 3 LatPos in future 2020

2018 LatPos free of charge

2018 All system NAVSTAR, GLONASS, GALILEO, BeiDo corrections from seperate base stations

2019 -2020 System upgrade to new equipment

2020. Provide all GNSS corrections. 2 4 Innovative solutions in Geomatics

New Course includes: • Computer graphics in Geomatics • Fundamentals of Land Management • Global Positioning Systems • Digital Terrain Models • Local Geodetic Networks • Geodetic Laser Scaninng • Remote Sensing Methods • Building Information System

United Nations / Argentina Workshop on the Applications of Global Navigation Satellite Systems 2 CONAE, Falda del Carmen, Argentina 19 – 23 March, 2018 5

Thank You for Your attention!

e-mail: [email protected]

WEB: www.latpos.lgia.gov.lv

United Nations / Argentina Workshop on the Applications of Global Navigation Satellite Systems CONAE, Falda del Carmen, Argentina 19 – 23 March, 2018