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Station Report

Geoid velocity added

To correct for the vertical drift between reference frames, the velocity of the geoid height (VN) is now calculated and incorporated into the calculation of the orthometric height. View documentation to learn more.

Site Identification

Name Province NTS map sheet Unique Number Provincial Identifier Network
FRDN CACS-GSD New Brunswick 021G15 M031000 FRDN CSRS

Station Coordinates

Unless otherwise noted, all displayed uncertainties are computed at the 68% (1-sigma) confidence level.

Changing these fields will auto-update the station coordinate information below.

The velocities are interpolated from the national Velocity Grid version 7.0.

h (metres)
Vφ (mm/y)
Vλ (mm/y)
Vh (mm/y)
X (metres)
Y (metres)
Z (metres)
Vx (mm/y)
Vy (mm/y)
Vz (mm/y)
Easting (metres)
Northing (metres)
h (metres)
N (metres)
H (metres)
Published date Project ID 2023-09-05       M18-020
VN (mm/year)
VH (mm/year)
Equipot. of geoid model (W0, m2s-2)

Vertical Data (levelling)

Use the value of H from the coordinates above.

Vertical Datum Separation

Use the value of H from the coordinates above.


FRDN is a continuously tracking GNSS station and is part of the Canadian Active Control System (CACS). The station is located at the Hugh John Flemming Forestry Centre in Fredericton, New Brunswick.

The GNSS reference mark consists of a brass plate with a forced centered stainless steel bolt. The brass plate is cemented to the top of 12.0 m long steel casing, 0.1525 m in diameter. The 12.0 m steel casing is drilled 7.2 m into the ground and 3.0 m into bedrock and filled with concrete. The steel casing is 1.5 m above grade. The casing is inside a 0.900 m diameter plastic culvert extending from 5.8 m below grade to ground level and filled with gravel to a depth 1 meter below grade. A 0.600 m diameter concrete culvert is inserted into the plastic culvert and extends 1.5 m above grade.

Equipment on site

Model/Type Start date
Receiver SEPT POLARX5 2022-06-30 17:38:00
Clock Internal 2009-11-29 00:00:00


Model Start date Height (m) Phase center offset (mm)
TPSCR.G3 NONE 2016-08-11 00:00:00 0.100 85.98 117.15 86.03 114.99
TPSCR.G3 NONE 2014-08-07 00:00:00 0.100 85.98 117.15 86.03 114.99
TPSCR.G3 NONE 2009-12-21 00:00:00 0.100 85.98 117.15 86.03 114.99
AOAD/M_T NONE 2006-07-31 14:40:00 0.100 91.84 120.35 91.84 120.35
AOAD/M_T NONE 2004-07-09 16:00:00 0.100 91.84 120.35 91.84 120.35
AOAD/M_T NONE 2003-07-01 00:00:00 0.100 91.84 120.35 91.84 120.35

Typical Antenna


Use of Canadian Geodetic Survey products and data is subject to the Open Government Licence - Canada

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