Millport site history
History summary
| Station name | Millport |
|---|---|
| Country | UK |
| Latitude of measuring point |
1984 onwards: 55° 44' 58.7" N
1965 - 1984: 55° 44' 58" N 1954 - 1965: 55° 44' 57" N |
| Longitude of measuring point |
1984 onwards: 04° 54' 21.0" W
1965 - 1984: 04° 54' 22" W 1954 - 1965: 04° 54' 22" W |
| OS grid ref. of measuring point |
1984 onwards: NS 1772 5452
1965 - 1984: NS 1771 5449 1954 - 1965: NS 1770 5448 |
| Datum reference |
All data refer to Admiralty Chart Datum (ACD)
ACD = ODN -1.62m |
| Time reference | GMT (hours 00-23) |
| Contributor |
Environment Agency Anglian Regional Office,
Kingfisher House, Goldhay Way, Orton Goldhay, Peterborough, Cambridgeshire, PE2 5ZR |
| Instrument type |
1954 - Cary-Porter gauge.
1965 - Lea gauge and charts. 1984 - Pier demolished with TG Building. 1985 - New site on new jetty close to site of old jetty. A temporary Ott gauge was installed in January. In March the DATARING system was installed, with a pneumatic bubbler system. |
| Site of measuring point | Attached to leg of pier |
| Position of tide gauge building | NS 1769 5454 - Building at landward end of pier |
| Observational period | 1978,1981-1983,1985-2026 |
Benchmarks
| Benchmark | OS grid ref. | Description | Height above ODN (m) |
|---|---|---|---|
| TGBM | NS 1757 5449 | Fl Br G4602 Marine station | 6.205 |
| Aux1 | NS 1772 5457 | OSBM bolt rock SE side Rd 5M NE end wall | 4.456 |
| Aux2 | NS 1769 5454 | Rivet pier 0.8M prod SE face of TG building | 4.316 |
| Aux3 | NS 1718 5451 | No 45 Marine Parade NW angle N face | 5.393 |
| Ref BM | NS 1772 5452 | ref. mark rivet (approx. grid ref.) | 3.497 |
ODN = Ordnance Datum Newlyn
Datum information
- TGZ = Chart Datum = 1.62m below ODN
- TGZ = Chart Datum = 7.825m below TGBM
- TGZ = Chart Datum = 6.076m below Aux 1
- TGZ = Chart Datum = 5.936m below Aux 2
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 |
|---|---|---|---|
| 1978 | ASLVZZ01 | 99 | 60 minutes |
| 1981 | ASLVZZ01 | 98 | 60 minutes |
| 1982 | ASLVZZ01 | 94 | 60 minutes |
| 1983 | ASLVZZ01 | 93 | 60 minutes |
| 1985 |
ASLVZZ01 ASLVBG02 |
7 (January to March) 76 (March to December) |
60 minutes |
| 1986 | ASLVBG02 | 99 | 60 minutes |
| 1987 | ASLVBG02 | 99 | 60 minutes |
| 1988 | ASLVBG02 | 99 | 60 minutes |
| 1989 | ASLVBG02 | 99 | 60 minutes |
| 1990 | ASLVBG02 | 88 | 60 minutes |
| 1991 | ASLVBG02 | 96 | 60 minutes |
| 1992 | ASLVBG02 | 99 | 60 minutes |
| 1993 | ASLVBG02 | 89 | 15 minutes |
| 1994 | ASLVBG02 | 90 | 15 minutes |
| 1995 | ASLVBG02 | 80 | 15 minutes |
| 1996 | ASLVBG02 | 80 | 15 minutes |
| 1997 | ASLVBG02 | 99 | 15 minutes |
| 1998 | ASLVBG02 | 90 | 15 minutes |
| 1999 | ASLVBG02 | 98 | 15 minutes |
| 2000 | ASLVBG02 | 95 | 15 minutes |
| 2001 | ASLVBG02 | 99 | 15 minutes |
| 2002 | ASLVBG02 | 94 | 15 minutes |
| 2003 | ASLVBG02 | 91 | 15 minutes |
| 2004 | ASLVBG02 | 91 | 15 minutes |
| 2005 | ASLVBG02 | 77 | 15 minutes |
| 2006 | ASLVBG02 | 95 | 15 minutes |
| 2007 | ASLVBG02 | 87 | 15 minutes |
| 2008 | ASLVBG02 | 100 | 15 minutes |
| 2009 | ASLVBG02 | 99 | 15 minutes |
| 2010 | ASLVBG02 | 99 | 15 minutes |
| 2011 | ASLVBG02 | 99 | 15 minutes |
| 2012 | ASLVBG02 | 99 | 15 minutes |
| 2013 | ASLVBG02 | 100 | 15 minutes |
| 2014 | ASLVBG02 | 100 | 15 minutes |
| 2015 | ASLVBG02 | 100 | 15 minutes |
| 2016 | ASLVBG02 | 100 | 15 minutes |
| 2017 | ASLVBG02 | 100 | 15 minutes |
| 2018 | ASLVBG02 | 99 | 15 minutes |
| 2019 | ASLVBG02 | 100 | 15 minutes |
| 2020 | ASLVBG02 | 99 | 15 minutes |
| 2021 | ASLVBG02 | 100 | 15 minutes |
| 2022 | ASLVBG02 | 99 | 15 minutes |
| 2023 | ASLVBG02 | 99 | 15 minutes |
| 2024 | ASLVBG02 | January - December | 15 minutes |
| 2025 | ASLVBG02 | January - December | 15 minutes |
| 2026 | ASLVBG02 | January - May | 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.
In March 1985 the DATARING system was installed. The bubbler gauge (ASLVBG02) replaced the temporary Ott gauge (ASLVZZ01). There is a gap in the file where the gauge was changed.
1993 - The processing of the 1993 file has left a null value at the start of the file (00:00 hours 01/01/1993). This is due to the sampling interval changing from 60 to 15 minutes and the
first data point being too far from 00:00 to interpolate.
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 08/12/2011 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.
20 March 2025 - Possible datum shift applied to ASLVBG02.
Missing and suspect data have been reported on the following day numbers:-
| Period | Parameter | Missing data | Suspect data |
|---|---|---|---|
| 1978 | ASLVZZ01 | 351-352 | 148-150,360-364 |
| 1981 | ASLVZZ01 | 116-118,121-123,178-180 | None |
| 1982 | ASLVZZ01 | 009-011,057-060,087-088,134-138,152-158,331-333,336-337,339-340,356-357 | 060,270-271 |
| 1983 | ASLVZZ01 | 003-006,019-020,034-035,038-055,276,332,346 | None |
| 1985 |
ASLVZZ01 ASLVBG02 |
025-081 222-224,274-281 |
None 310,338 |
| 1986 | ASLVBG02 | 103-105 | 180,197,272 |
| 1987 | ASLVBG02 | 014-016 | 122 |
| 1988 | ASLVBG02 | 188 | None |
| 1989 | ASLVBG02 | 103-104 | None |
| 1990 | ASLVBG02 | 023-066,338 | None |
| 1991 | ASLVBG02 | 183-191,347-350,354,359,362-363 | None |
| 1992 | ASLVBG02 | 055-056 | None |
| 1993 | ASLVBG02 | 012-020,096-098,334-365 | None |
| 1994 | ASLVBG02 | 001-026,193-202,182 189 | 182-187,189-193 |
| 1995 | ASLVBG02 | 045,206,290-365 | None |
| 1996 | ASLVBG02 | 001-074,191-192 | 074-213 |
| 1997 | ASLVBG02 | 364-365 | 310-314 |
| 1998 | ASLVBG02 | 001-013,041-048,111-121,209-214 | None |
| 1999 | ASLVBG02 | 292-298,318-320 | None |
| 2000 | ASLVBG02 | 005-007,025-028,034-035 207,232-243 | 106-110 |
| 2001 | ASLVBG02 | 094 | None |
| 2002 | ASLVBG02 | 169-177, 183-196 | 084-099,102-103,105-108,110-111,119,121,127-129 |
| 2003 | ASLVBG02 | 092,217-232,329-330,343-357 | None |
| 2004 | ASLVBG02 | 289-322,329-330 | 322-329 |
| 2005 | ASLVBG02 | 012-039,040-097 | None |
| 2006 | ASLVBG02 | 107-109,118-123,340-351 | None |
| 2007 | ASLVBG02 | 053-059,073-089,108-125,192-197,199-204 | None |
| 2008 | ASLVBG02 | None | None |
| 2009 | ASLVBG02 | 021,257-259 | None |
| 2010 | ASLVBG02 | 014,048,230 | None |
| 2011 | ASLVBG02 | 329-332,333,342,350 | 232-263,265-277,279-282,312-313,314-315,316-317,332,342-343,350,363 |
| 2012 | ASLVBG02 | 031 | 011,046,314 |
| 2013 | ASLVBG02 | None | 057 |
| 2014 | ASLVBG02 | None | 061,183 |
| 2015 | ASLVBG02 | None | None |
| 2016 | ASLVBG02 | None | 029-030,032,035,102-103,106,108,112-114,119,121-124,131-134,160-185,188-191,205,207,232,235-236,246,248,251-255,258,261,264,296-297,299-301,303-304,321-366 |
| 2017 | ASLVBG02 | None | 001-334 |
| 2018 | ASLVBG02 | 163 | 001-131,134-158,164-170,173-356,359-365 |
| 2019 | ASLVBG02 | None | 001-117,122-124,127-139,141-142,145-148,150-155,157-161,165-170,173-176,178-207,209-210,212,214-222,225-365 |
| 2020 | ASLVBG02 | 327 | 001-002,004-154,157-246,248,250-252,254-257,259-261,266-268,273-276,283,286,288-309,312,315-334,336-357,359-366 |
| 2021 | ASLVBG02 | None | 001-066,068-074,082-083,172-174,179-180,183-184,186-189,192,194-209,211-215,305,312,314-315,318,320,322-324,326,329-333,336,339-365 |
| 2022 | ASLVBG02 | 253,263 | 001-016,018-059,061-062,065-083,088-089,093,095-118,120,122,159-172,175-182,184-185,236,274,290,292-293,297,309-310,352-354,357,364-365 |
| 2023 | ASLVBG02 | 033 | 001,015,031,051,055,066,076-248,269,271-273,278-280,282,291-293,341 |
| 2024 | ASLVBG02 | 254,319 | 063,065-068,073-074,076-084,109-111,137-138,154,167,184,224,242-244,270,306-307,342-351,353,358 |
| 2025 | ASLVBG02 | 007,022,030,034,035,036,036-037,092,110,293,298,304,310,314,331,365 | 001-007,007-022,022-030,030-034,034-035,036,037,037-038,043-044,046-047,057-079,091,092,108-109,142-143,268-271,281-293,293-298,298-300,308-312,328-329,337 |
| 2026 | ASLVBG02 | 003,007,042,057,059,067,068,074,090,096,121,125,151 | 014-020,042,100-102,119-120,134 |
