Contributing agency

Station summaryALRT

Showing all stations within 1000 km of the observed station Active station No data for 30 days Decommissioned No observations in SONEL (Survey) Not co-located with observed station
Showing all stations within 1000 km of the observed station Available data / Station OK Available data / Problem(s) detected Does not work No longer exists Foreign partner management Not co-located with observed station
Showing all stations within 1000 km of the observed station Co-located with observed station Not co-located with observed station
  • More informations on each symbol.
  • GPS Tide Gauge DORIS
IGS-type acronym : ALRT
Latitude : 82.49430084
Longitude : -62.34049988
Installed date : 2002-07-16
Decommissioned date :
Country : CANADA
Station status : active (green)
Distance to Tide Gauge (m) : 450
Domes Nr.: 40162M001
Station operator: Unknown
IGS-like station form :

GPS position times seriesALRT

(Reference epoch: )

Offsets (mm)

MMaterial change or malfunction
Position discontinuity
Velocity discontinuity
Vertical component
East component
North Component

Data available at SONELALRT

Quality plots on RINEX filesALRT

Quality plots on RINEX files of ALRT Quality plots on RINEX files of ALRT Royal Observatory of Belgium

Plots generated using software developed with the EPN team at ROB
Observations & tracking performance Satellite tracking

informations (this operation may take 20 to 45s)

The satellite tracking graph has been calculated for all stations for the first day of each month. If you wish to have a graph for another date, choose the 'Calculate a specific date' option.

Log bookALRT

[IGSSTATION-6296] - 2015-08-28 (28/08/2015)

Data for all of day 238 and most of day 239 up to 18:44 UT are missing. We are trying to contact our local support to investigate further. I will advise if any of this missing data is recoverable.

[IGSSTATION-6096] - 2015-02-16 (16/02/2015)

Data submissions for TUKT have been delayed since day 015 (2015-01-15) due to an apparent UPS failure. It appears there will be a permanent data gap since that date. Unfortunately, it has been difficult to get on-site support. I will advise when we can get someone to plug the receiver directly into the power bar to resume data submissions.

[IGSSTATION-5254] - 2013-01-19 (21/01/2013)

The Ashtech Micro-Z receiver at ALRT appears to have stopped recording data and we are unable to connect to the receiver. We are trying to debug the problem with local support. I will advise when we have more information on when we can expect the site to be back on-line.

[IGSSTATION-4976] - 2012-06-27 (07/01/2013)

After the discovery of an incorrect antenna type in the site log and RINEX files for NAIN, we immediately inspected all of our other GPS sites. Unfortunately, we discovered that ALRT, HOLM also have incorrect antenna types. In all cases, the antenna type should be ASH701945D_M NONE, not ASH701945C_M NONE. All sites but HOLM have used only the one antenna (HOLM had an AOAD/M for the first two years).
Although our local contact in ALRT has not yet inspected that antenna to definitively confirmed its type, its serial number (CR520020903) falls between that for NAIN (CR520020901) and HOLM (CR520020905). It is therefore certain that the ALRT antenna is also a ASH701945D_M. Nevertheless, I will post a confirmation of this once it is inspected.
Corrected sites logs for these sites have been submitted to Central Bureau and, starting today (Day 180), RINEX files will include the correct antenna type. We will also soon begin resubmitting corrected historic RINEX files. I will advise when all the files have been posted to the IGS archives.

Co-located instrumentsALRT

  • Tide gauge : ALERT (ALRTG)