Revised Local Reference (RLR) Diagram for PORTSMOUTH

Station ID: 350

RLR diagram based on the information in the datum section below

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Datum information

Add 4.814m to data values 1961-1964 to refer to RLR
Add 4.210m to data values 1965-1979 to refer to RLR
Add 4.193m to data values 1980 onwards to refer to RLR
RLR is 10.200m below primary benchmark SU 6269 0053

Ellipsoidal information from SONEL (explanation)

RLR Height above ellipsoid:38.872 ± 0.007 m
Vertical Land Movement Rate:-0.05 ± 0.23 mm/yr
GNSS Solution:ULR6b
GNSS Availability:2001-09-25 to 2016-10-09