Levelling detail for

Benchmark positionning related to the tide gauge station

2003-03-21

Benchmarks description table

SOURCE : Rénovation de la station DORIS

Levelling campain :

Benchmark	Latitude (°)	Longitude (°)	Height (m)	Distance to Tide Gauge (m)
POL	----	----	7.927	----
HELA	-15.94222279	-5.66942276	446.133	5710
HELB	-15.94235619	-5.66736742	444.256	5920
HEMB	-15.94235628	-5.66736757	444.247	5920
DORIS/mark	-15.94235622	-5.66736752	441.851	5920
GIG9	-15.94216692	-5.66766356	442.315	5880
Prbpm	-15.94228326	-5.66753466	442.252	5900
shmg	-15.92055175	-5.71786644	10.617	40
Benchmark 1	----	----	442.412	----
Benchmark 2	----	----	442.682	----

Legend : Fondamental benchmark, GNSS Benchmarks

Benchmarks vertical positionning diagram

Reference:

Leveling evolution

Stand point			GIG9	GIG9	GIG9	GIG9	GIG9	Prbpm	Prbpm	Prbpm	Prbpm	Benchmark 1	Benchmark 1	DORIS/mark	DORIS/mark	DORIS/mark	DORIS/mark	POL	HELA	HELA	HELA	HELA	HELA	HELA	HELB	HELB	HELB	HELB	HELB	HEMB	HEMB	HEMB	HEMB
End point			Prbpm	Benchmark 1	DORIS/mark	Benchmark 2	shmg	Benchmark 1	DORIS/mark	Benchmark 2	shmg	DORIS/mark	Benchmark 2	Benchmark 2	GIG9	Prbpm	shmg	shmg	HELB	HEMB	DORIS/mark	GIG9	Prbpm	shmg	HEMB	DORIS/mark	GIG9	Prbpm	shmg	DORIS/mark	GIG9	Prbpm	shmg
Distance (m)			19	----	38	----	5883	----	20	----	5901	----	----	----	38	20	5921	----	221	221	221	188	202	5714	0	0	38	20	5921	0	38	20	5921
Height difference (m)	Campaign 1	2003-03-21	-0.0630 ± 0.01	0.2230 ± 0.001	0.4650 ± 0.001	0.4610 ± 0.001	-431.6980 ± 0.01	0.1600 ± 0.001	0.4020 ± 0.001	0.4000 ± 0.001	-431.6350 ± 0.01	0.2420 ± 0.001	0.2700 ± 0.001	-0.0280 ± 0.001	0.4640 ± 0.01	0.4010 ± 0.01	-431.2340 ± 0.01	2.6900 ± 0.001	-1.8770 ± 0.01	-1.8860 ± 0.01	-4.2820 ± 0.01	-3.8180 ± 0.01	-3.8810 ± 0.01	-435.5160 ± 0.01	-0.0090 ± 0.01	-2.4050 ± 0.001	-1.9410 ± 0.01	-2.0040 ± 0.01	-433.6390 ± 0.01	-2.3960 ± 0.001	-1.9320 ± 0.01	-1.9950 ± 0.01	-433.6300 ± 0.01
Height difference evolution graph

Download leveling data

TIDE GAUGE LOCAL LEVELING NETWORK DATA OF STATION Saint Helena ----------------------------------------------------------------------------------------------------- Benchmark Lat. Long. Height Year of determination St.dev Distance_to_TG 10chr (°) 14chr (°) 14chr (m) 10chr 22chr (m)10chr (m) 10chr ----------------------------------------------------------------------------------------------------- HELA -15.942223 -5.669423 446.133 2003 0.01100 230 HELB -15.942356 -5.667367 444.256 2003 0.01500 20 HEMB -15.942356 -5.667368 444.247 2003 0.01800 20 DORIS/mark-15.942356 -5.667368 441.851 2003 0.01800 20 GIG9 -15.942167 -5.667664 442.315 2003 0.02100 50 Prbpm -15.942283 -5.667535 442.252 2003 0.02300 40 shmg -15.920552 -5.717866 10.617 2003 0.00100 5930 Benchmark ---- ---- 442.412 2003 0.02300 ---- Benchmark ---- ---- 442.682 2003 0.02300 ---- POL ---- ---- 7.927 2003 0.00000 ----

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Co-located instruments

Doris : ST HELENA (HEMB)
Tide Gauge : JAMESTOWN LANDING STEPS (SHELE)
GPS : Saint Helena (STHL)
Tide Gauge : Rupert's Bay (STHRB)
GPS : Jameston (SHTA)
GPS : Jamestown Hill (RTOW)

LEVELING OF SAINTE-HELENE