Contributing agency

Station summaryCHAT

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
IGS-type acronym : CHAT
Latitude : -43.95579910
Longitude : -176.56599426
Installed date : 1995-10-04
Decommissioned date : 2012-03-06
Station status : Decommissioned (white and red cross)
Distance to Tide Gauge (m) : 4000
Domes Nr.: 50207M001
Station operator: Unknown
IGS-like station form :

GPS position times seriesCHAT

(Reference epoch: )

Offsets (mm)

MMaterial change or malfunction
RFReference Frame change
NANot available
Position discontinuity
Velocity discontinuity
Vertical component
East component
North Component

Data available at SONELCHAT

Quality plots on RINEX filesCHAT

Quality plots on RINEX files of CHAT Quality plots on RINEX files of CHAT 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.

Co-located instrumentsCHAT


If you have a relevant reference to suggest, please send-us an e-mail :
  • puce Ballu, Gravelle et al., 2019. Vertical land motion in the Southwest and Central Pacific from available GNSS solutions and implications for relative sea levels. Geophysical Journal International. Get this reference BibTeX of the reference

Log bookCHAT

[IGSSTATION-6421] - 2015-11-29 (30/11/2015)

we have recently discovered an error in the antenna model record for CHAT (now decommissioned).

The time period affected runs from 2001-11-28 to 2012-03-06.

The antenna model was wrongly recorded as ASH701945C_M.

The correct code to be considered is ASH701945B_M.

An updated version of the site log has been submitted to IGS Central Bureau.

We are also updating the RINEX headers and resubmitting daily rinex files to IGN and CDDIS repositories.

SONEL will update the RINEX files as soon as they are available on CDDIS.

Le 13/06/2012 (13/06/2012)

[IGSMAIL-6603] The equipment at CHAT (Chatham Islands) suffered a terminal failure on 6 March 2012. We are discontinuing operations at CHAT for several reasons, including that the nearby (20 km) IGS site CHTI has been operating in parallel for 4.5 years (since 2007 day 345).

Le 25/10/2010 (25/05/2010)

[IGSSTATION-3768]: We announced several years ago that CHAT was to be replaced by CHTI situated about 20 km away, and that CHAT would probably go off the air once any of its aging equipment failed.