The Use of GNSS in Sweden and the National CORS Network SWEPOS

Mikael LILJE, Peter WIKLUND, Gunnar HEDLINGLantmäteriet, Sweden

(the Swedish mapping, cadastral and land registration authority)

How it started

SWEPOS was designed and established as a collaboration between

• Lantmäteriet

• Onsala Space Observatory

• Swedish National Research and Testing Institute

1991

1992

1994

1995

1995-99

2000-

1st generation SWEPOS network

The 21 stations are mounted on bedrock and have redundant equipment for GNSS-observations, communications, power supply etc.

Vilhelmina

Kiruna

Onsala

2nd generation SWEPOS network

The 2nd generation network consist of a densification (baselines ~70 km), established between the years 2002-2009

The 2nd generation network also includes a densification (15-30 km), at a number of larger construction projects as new transportation infrastructure and new city location

2

3

4

5

1

3rd generation SWEPOS 2011 -

During recent years many users have requested improvements especially in the vertical position uncertainty

The 3rd generation SWEPOS network will be an almost nation-wide densification with in-between distances of ~35 km

Within 4-5 years further improvements with new satellite signals and systems.

SWEPOS Stations

5 are included in the IGS-network

7 are included in the EPN-network (will increase to 27 sites 2014)

41 class A stations 260 class B stations

SWEPOS control centre

• Surveillance of CORS /GNSS- stations, data communication, electricity and backup power, temperature.

• Customer support

• Problem solving

• Quality control of data

SWEPOS services

• Post processing data (RINEX-data)• Virtual RINEX-data

• SWEPOS Automatic calculation service

• Real time services- Network-DGNSS–service- Network-RTK–service

• SWEPOS-website- Coordinate transformation- Satellite prediction- monitor stations- Ionosphere monitor

SWEPOS Network-DGNSS service

• 3–4 dm accuracy

• Correction data for GPS and GLONASS• Connection to the service via GSM or Mobile Internet

• Data format RTCM 2.3

Network-DGNSS service, user fees:

• Unlimited data amount:

€550 /con/year +GSM

SWEPOS Network-RTK service

• Centimeter accuracy

• Correction data for GPS and GLONASS• Connection to the service via GSM or Mobile Internet

• Data format RTCM 3.0 (and RTCM 2.3)

Network-RTK service, user fees:

A. Unlimited data amount:

€1600 /con./year +GSM

B. Down-loaded data:

€550 /con/year + €0,5 /min +GSM

Network RTK users2916 total subscriptions

2014-06-03

21%

18%

7%21%

5%

3%

5%

20%

Municipalities

Consultants

Lantmäteriet

Construction

Agriculture

Power producing companies

Govermental

Other

0

500

1000

1500

2000

2500

2004

-01-

15

2005

-01-

15

2006

-01-

15

2007

-01-

15

2008

-01-

15

2009

-01-

15

2010

-01-

15

2011

-01-

15

2012

-01-

15

2013

-01-

15

Connectiontime to the service

hours/weekNumber of subscriptions

Total connection time to service

0

2000

4000

6000

8000

10000

12000

14000

16000

2004

0120

0424

2004

4720

0517

2005

4020

0611

2006

3420

0705

2007

2820

0751

2008

2120

0844

2009

1520

0938

2010

0820

1031

2011

0220

1125

2011

4820

1219

2012

4220

1313

2013

36

Antal timmar

RTK applications overview

Marine applications, Bild; Marin mätteknik

Machine guidance, Photo; PEAB

Agriculture

RTK applications overview

Partners

• Cooperation with Trimble VRS now, Leica SmartNet and TopCon TopNet Live to increase the use of GNSS and RTK.

• To find new applications and widen the use of GNSS

• Possibility to make a package, service + GNSS equipment –the user needs only one contact

• Use of one common geodetic infrastructure for GNSS, all users contribute to a common infrastructure. The users do not need to finance several separate geodetic infrastructures.

Thanks for your attention!

The Use of GNSS in Sweden and the National CORS Network SWEPOS

Mikael LILJE, Peter WIKLUND, Gunnar HEDLINGLantmäteriet, Sweden

(the Swedish mapping, cadastral and land registration authority)