St. Mary's site history
History summary
| Station name | St. Mary's |
|---|---|
| Country | UK |
| Latitude of measuring point | 49° 55' 6.5" N |
| Longitude of measuring point | 06° 18' 59.1" W |
| OS grid ref. of measuring point | SV 9027 1097 |
| Datum reference |
All data refer to Admiralty Chart Datum (ACD)
ACD = ODL -2.91m |
| Time reference | GMT (hours 00-23) |
| Contributor |
Environment Agency Anglian Regional Office,
Kingfisher House, Goldhay Way, Orton Goldhay, Peterborough, Cambridgeshire, PE2 5ZR |
| Instrument type |
1966 - Lea chart recorder float gauge installed.
1989 - Gauge and building lost in a storm. Delay due to redevelopment of the quay which incorporated the new tide gauge. 1994 - DATARING system installed with two full tide and a mid tide bubblers. 2016 - New bubbler gauge installed. |
| Site of measuring point | The measuring points are located on the nose of the NE corner of the quay |
| Position of tide gauge building | SV 9021 1090 - The tide gauge is located on The Quay, Hugh Town, inside the store room, harbour offices |
| Observational period |
1976, 1994-2015. Offline from June 2015 due to harbour works.
17/05/2016 (New gauge installed at new location) - 2026 |
Benchmark descriptions
| Benchmark | OS grid ref. | Description | Height above ODL (m) |
|---|---|---|---|
| TGBM | Bolt by VTS | 4.514 | |
| Aux1 | Bolt by VTS 2 | 4.489 | |
| Aux2 | Bolt by top of steps | 3.866 | |
| Aux3 | Bolt by top of steps | 3.872 | |
| Aux4 | SV 9028 1097 | Point above pressure points | 4.515 |
| Aux5 | SV 9014 1071 | Cut Mark east angle Mermaid Inn | 4.930 |
| Aux6 | SV 9007 1065 | Cut Mark Guard House top of Garrison Hill | 21.724 |
ODL = Ordnance Datum Local
Parameters
Please Note: All parameters listed below are sea level measured in metres. Different parameter codes represent different gauges. For an explanation of the codes, please see the BODC parameter dictionary.
| Period | Parameters | Completeness index (%) | Sample interval |
|---|---|---|---|
| 1976 | ASLVZZ01 | 9 | 60 minutes |
| 1994 | ASLVBG02 | 52 | 15 minutes |
| 1995 | ASLVBG02 | 100 | 15 minutes |
| 1996 | ASLVBG02 | 99 | 15 minutes |
| 1997 | ASLVBG02 | 100 | 15 minutes |
| 1998 | ASLVBG02 | 100 | 15 minutes |
| 1999 | ASLVBG02 | 100 | 15 minutes |
| 2000 | ASLVBG02 | 100 | 15 minutes |
| 2001 | ASLVBG02 | 99 | 15 minutes |
| 2002 | ASLVBG02 | 94 | 15 minutes |
| 2003 | ASLVBG02 | 98 | 15 minutes |
| 2004 | ASLVBG02 | 100 | 15 minutes |
| 2005 | ASLVBG02 | 95 | 15 minutes |
| 2006 | ASLVBG02 | 99 | 15 minutes |
| 2007 | ASLVBG02 | 99 | 15 minutes |
| 2008 | ASLVBG02 | 93 | 15 minutes |
| 2009 | ASLVBG02 | 100 | 15 minutes |
| 2010 | ASLVBG02 | 100 | 15 minutes |
| 2011 | ASLVBG02 | 99 | 15 minutes |
| 2012 | ASLVBG02 | 99 | 15 minutes |
| 2013 | ASLVBG02 | 99 | 15 minutes |
| 2014 | ASLVBG02 | 99 | 15 minutes |
| 2015 | ASLVBG02 | 42 | 15 minutes |
| 2016 | ASLVBG02 | 62 | 15 minutes |
| 2017 | ASLVBG02 | 100 | 15 minutes |
| 2018 | ASLVBG02 | 100 | 15 minutes |
| 2019 | ASLVBG02 | 100 | 15 minutes |
| 2020 | ASLVBG02 | 100 | 15 minutes |
| 2021 | ASLVBG02 | 100 | 15 minutes |
| 2022 | ASLVBG02 | 100 | 15 minutes |
| 2023 | ASLVBG02 | 99 | 15 minutes |
| 2024 | ASLVBG02 | January - December | 15 minutes |
| 2025 | ASLVBG02 | January - December | 15 minutes |
| 2026 | ASLVBG02 | January - February | 15 minutes |
Quality assessment
All data have been compared with the current Harmonic Constants library, and residuals checked. Records have been visually inspected for spikes, datum shifts and timing errors.
Where there are problems with the primary channel, data may be available from the backup channel. Please contact enquiries@bodc.ac.uk for more information.
February 2003 - File output has been altered so that all values fall on the quarter hour and gaps are filled in with null values, marked with an 'N' flag.
March 2003 - Residuals (observed minus predicted sea level values, measured in metres) now included in the file output.
On 28/03/2012 a new data logger was installed. Tests were carried out to ensure the logger was functioning correctly, resulting in some data being lost.
November 2012 - The file output has been altered to reflect the Contributor name change from Proudman Oceanographic Laboratory to National Oceanography Centre, Liverpool. Also, the Parameter
code has been improved and now uses a controlled vocabulary.
Missing and suspect data have been reported on the following day numbers:-
| Period | Parameter | Missing data | Suspect data |
|---|---|---|---|
| 1976 | ASLVZZ01 | 033-366 | None |
| 1994 | ASLVBG02 | 001-174 | None |
| 1995 | ASLVBG02 | None | None |
| 1996 | ASLVBG02 | 338-340 | 263,302 |
| 1997 | ASLVBG02 | None | None |
| 1998 | ASLVBG02 | None | 004,005,007,093,364 |
| 1999 | ASLVBG02 | None | 003,062 |
| 2000 | ASLVBG02 | None | 277 |
| 2001 | ASLVBG02 | 338 | 023,202-203,336-338 |
| 2002 | ASLVBG02 | 015,064,093,115,129,169-176,302-316,351 | 010-015,032-036,058-064,089-093,125-129,129-131,141-142,196-202,247-248 |
| 2003 | ASLVBG02 | 291-294,308,309 | None |
| 2004 | ASLVBG02 | None | None |
| 2005 | ASLVBG02 | 047-056,155,163-172 | 041-047,187-223,310-315 |
| 2006 | ASLVBG02 | 321 | 185,341,356-365 |
| 2007 | ASLVBG02 | 213 | 001-004,041,043,343,360-363 |
| 2008 | ASLVBG02 | 163-186 | 005-007,192 |
| 2009 | ASLVBG02 | None | 012-015,017-185,228-294,326 |
| 2010 | ASLVBG02 | None | 029-107,109-147,169,173-180 |
| 2011 | ASLVBG02 | 005 | 046-047 |
| 2012 | ASLVBG02 | 087-088,096,149 | 089,100-101,111,124-125,128,150-151,159,162-163,166,168,170,172-173,182-183,188,196,204-217,219-267,280-305,321-322,332-338,351-352 |
| 2013 | ASLVBG02 | 061 | 019-020,027-028,049-050,052,070,073-081,101,103-104,113-312,316-324,353-356,358-359,361 |
| 2014 | ASLVBG02 | 308 | 001-028,032-063,066-069,071-077,079-080,083-085,094,126,133-134,138-141,144,145-160,167-169,183-270,277-307,315,317-343,345 |
| 2015 | ASLVBG02 | 152-365 | 010-015,028-029,033-035,040-120,122-123,125-152 |
| 2016 | ASLVBG02 | 001-138 | 138-366 |
| 2017 | ASLVBG02 | None | 001-157,159-183,185-206,208-214,216-229,231-250,252-293,298-301,303-365 |
| 2018 | ASLVBG02 | None | 001-240,248-275,278-365 |
| 2019 | ASLVBG02 | None | 001-274,277,282-337,342-350,356-360,362 |
| 2020 | ASLVBG02 | None | 001-196,198-199,201-203,205-225,229,231-366 |
| 2021 | ASLVBG02 | None | 001-107,109-190,193-194,208-211,217-221,223-228,232-234,251-365 |
| 2022 | ASLVBG02 | None | 001-365 |
| 2023 | ASLVBG02 | 170,226 | 001-170,170-226,226-365 |
| 2024 | ASLVBG02 | None | 001-366 |
| 2025 | ASLVBG02 | 002,054,166,181,186,241,259 | 001-002,002-054,054-166,166-181,181-186,186-241,241-259,259-365 |
| 2026 | ASLVBG02 | None | 001-059 |
