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
PRDS CACS-GSD	Alberta	082J16	756047	429225	CSRS

Station Coordinates

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

The velocities are interpolated from the national Velocity Grid version 8.0.

Latitude
Longitude
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)
Zone
Easting (metres)
Northing (metres)
h (metres)
Scale
Combined
Convergence
N (metres)
H (metres)
Published date Project ID	2024-11-21 M24-002
VN (mm/year)
VH (mm/year)
Equipot. of geoid model (W₀, m²s^-2)

Vertical Data (levelling)

Vertical Datum	Elevation (m)	Order	Gravity (mGal)	Published	Project ID
CGVD2013 (2010.0)	1263.923	1st	980750.22	2013	H13ML1311
CGVD28	1263.753	1st	981140.93	1995	N5A95

The CGVD2013 height reported in the Vertical Data table is approximate because it is calculated from historical levelling data and not from the combination of GNSS and a geoid model.

Vertical Datum Separation

Datum 1 − Datum 2	Elevation 1 (m)	Elevation 2 (m)	Elevation Difference (m)	Epoch

Location

PRDS is a continuously tracking GNSS station and is part of the Canadian Active Control System (CACS). The station is co-located with the PRD2 and PRD3 GNSS stations near the Rothney Astrophysical Observatory in the rural community of Priddis, 7 km west of Calgary, Alberta.

The GNSS reference mark consists of a brass plate with a forced centered stainless steel bolt embedded on top of a 0.40 m in diameter concrete pier, extending into soil to a depth of 3.0 m and protruding 2.0 m above ground level.

Equipment on site

	Model/Type	Start date
Receiver	JAVAD TRE_3N DELTA	2019-11-12 18:42:00
Clock	Internal	2024-05-15 03:29:42

Antenna

Model	Start date	Height (m)	Phase center offset (mm)
Model	Start date	Height (m)	GPS L1	GPS L2	GLONASS L1	GLONASS L2
AOAD/M_T NONE	2022-08-16 23:14:00	0.100	91.84	120.35	91.84	120.35
AOAD/M_T NONE	2012-07-27 20:00:00	0.100	91.84	120.35	91.84	120.35
AOAD/M_T NONE	2006-07-18 18:35:00	0.100	91.84	120.35	91.84	120.35
AOAD/M_T NONE	2003-05-21 00:00:00	0.100	91.84	120.35	91.84	120.35
AOAD/M_T NONE	2002-11-01 00:00:00	0.100	91.84	120.35	91.84	120.35
AOAD/M_T NONE	1999-06-14 14:40:00	0.100	91.84	120.35	91.84	120.35
AOAD/M_T NONE	1999-05-11 16:10:00	0.159	91.84	120.35	91.84	120.35
AOAD/M_T NONE	1997-01-07 00:00:00	0.100	91.84	120.35	91.84	120.35