Data



Data Notes



Extracted from Database

20 May 2019

PORT BLAIR

Station Information

Station ID: 206
Latitude: 11.683333
Longitude: 92.766667
GLOSS ID: 38
Coastline code: 540
Station code: 1
Country: INDIA
Time span of RLR data: 1916 – 1964
RLR completeness (%): 29
Time span of metric data: 1916 – 2010
Metric completeness (%): 21
MTL Data: 1952-1957
MTL-MSL (mm): 4
Date of last update: 27 Jan 2016

Green Arrow: Current Station
Yellow Marker: Neighbouring RLR Station
Red Marker: Neighbouring Metric Station

Please note: In many cases, the station position in our database is accurate to only one minute. Thus, the tide gauge may not appear to be on the coast.

Tide Gauge Data

Plot of monthly mean sea level data at PORT BLAIR.

Link to larger image of monthly data plot.
Download monthly mean sea level data.

Plot of annual mean sea level data at PORT BLAIR.

Link to larger image of annual data plot.
Download annual mean sea level data.

Download metric sea level data. Use only with extreme caution.
NOTE: If some of the data are red in the plots above, the 'flag for attention' is set. Please see the documentation below.

Additional Data Sources (guide to additional data sources)

Nearby GNSS Stations from SONEL: PBRI, CARI, PBR2
Nearby Real Time Stations from VLIZ: ptbl
Fast Delivery Data from UHSLC station 908: hourly and daily

Station Documentation

Link to RLR information.

Documentation - date unknown

1952-1957 Values based on readings of high and low waters

Documentation added 1991-06-11

Port Blair 540/001 RLR(1964) is 11.0m below BM 1E

Documentation added 2010-09-15

Port Blair was switched to 'Metric' following receipt of the data for 2002 there seems to be anomaly between the information supplied with the data i.e. benchmark name and details to what the data looks like when plotted. Benchmark 1992 Type B 4.39m above Chart Datum and BM No.1E 5.30m above Chart Datum are mentioned in a letter dated 05.07.07. For data 2002 the benchmark is quoted as being BM BOM 4.385m above Chart Datum - could this actually be BM 1992 Type B as previously? For data 2003 onwards benchmark is given as BM BOM 5.04m above Chart Datum although again the data 2006/7 is obviously to a different datum to 2003.

Documentation added 2016-01-12

We have changed the first line above, indicating that the MTL ends in 1957, not 1956 as was previously stated. We have verified that the values in the database are those from Pub. Sci. 20, in which they were indicated as MTL.

Documentation added 2016-01-22

A value of MTL-MSL=4 mm has been applied to the RLR data for the period 1952-1957. This value was derived from the average of two differences in the annual MSL and MTL listed in Pub. Sci. 24. Note that no correction has been applied to the metric data.

Data Authority

Survey of India
Geodetic and Research Branch
17 E.C. Road
Dehra Dun
PIN 248 001