Baltra-B (Galapagos Islands) Site History
Site
| Station | Baltra-B, Galapaogs Is. |
|---|---|
| Country | Ecuador |
| Latitude | 00° 26.1' S |
| Longitude | 090° 17.1' W |
| GLOSS No | 169 |
| Time Reference | GMT (hours 00-23) |
| Contributor | 1985-present UH Sea Level Center |
| Instrument Type | 1. Leupold and Stevens Analog-to-Digital Recorder (ADR) 2. Handar Encoder (ENC) |
| Primary gauge | ADR: 1985-90 ENC: 1991- |
| Site of Gauge | |
| Observational periods | 1985 - present |
Reference Level
All heights have been referred to the station tide staff zero which is linked to fixed benchmarks. This station is distinguished from station Baltra-A because the data have not been levelled to common bench marks.
Tide Gauge Benchmark (TGBM) Description
| Benchmark | Description |
|---|---|
| UH-1 | Type not documented, located at 133 ft, 40 deg. true N at SE corner of the fuel storage bldg (established 24 March 1985). |
| UH-2 | Type not documented, located at 133.33ft, 40 deg. true N at SE corner of fuel bldg (established 24 Mar 1985). |
| UH-3 | SS square plate located at base of the old lamppost just off line between the station and the lighthouse, located 237 deg. true N and about 250 ft from tide station (established 8 Jun 1990). |
| 1 | Type not documented, behind storage area (established April 1988). |
| 2A | 10cm disc stamped 'Instituto Oceanografico de l'Armada. Prohibido Tocar 1977'. 234 deg. true N of tide station. (established 8 June 1990). |
| SW1 | Head of 1/4inch screw mounted on witch switch on Encoder well (established 8 June 1990). |
Datum Levels
| UH-1 | 4.052m above tide staff zero (June 1985) |
|---|---|
| UH-2 | 4.189m above tide staff zero (June 1985) |
Datum of data is zero of tide staff
Quality Assessment by the UH Sea Level Center
Comments
The daily and monthly means do not reveal any reference level changes or trends and agree well with Santa Cruz.
The hourly data contain significant timing errors in 1988-1990 as noted below.
Encoder data, as noted by * below were used to fill some gaps.
The primary calibration device (a reference level switch) had many questionable readings during 1995-1996. However, the level appears steady as seen in differences with Santa Cruz and La Libertad.
| Year | CI(%) | Missing Data | Replaced Gaps or Bad Data | Questionable Fluctuations |
|---|---|---|---|---|
| 1986 | 90 | 280-308,330-338 | none | none |
| 1987 | 100 | none | none | none |
| 1988 | 92 | 5-35,107-108 | (14)061-(23)061 (18)152-(23)152 *(00)035-(20)048 *(17)091-(11)107 | 121-140,152-153 |
| 1989 | 100 | none | (12)334-(23)334 *(18)001-(13)152 | 152-161,168-169,184-185,204,232- |
| 1990 | 100 | none | (02)151-(21)151 (12)213-(23)213 | 30-32,56-60,84-092,098-105,113-150,159-161 |
| 1991 | 100 | none | (10)202-(23)202 *(00)274-(23)315 | none |
| 1992 | 99 | 317-322 | (21)014-(20)015 | none |
| 1993 | 96 | 197-211 | none | none |
| 1994 | 100 | none | (23)196-(11)197 | none |
| 1995 | 90 | 30-67 | (21)082-(20)083 (20)149-(13)150 | none |
| 1996 | 97 | 212-223 | none | none |
| 1997 | 99 | 298-301 | none | none |
| 1998 | 99 | 293-298 | (02)040-(16)040 | none |
