ECGN Meta Data Form (2004-05-04) 0. General Information ECGN Station Name Zimmerwald ECGN main benchmark ID ZIMM Country of Station location Switzerland Approx. Station coordinates Latitude 46 52 37 Longitude 7 27 55 Ellips. height in m 947 Form completed by (full address) Werner Gurtner Astronomisches Institut Universität Bern Sidlerstrasse 5 CH-3012 Bern Elmar Brockmann Swiss Federal Office of Topography Seftigenstrasse 264 CH-3084 Wabern Completion date 2004-05-04 Report Type (NEW/UPDATE) NEW If update Section updated Additional Information Main Marker also named 1186.800.0 (Kappenbolzen) 1. GNSS Information Station Name Zimmerwald 1186.800.8 (L+T 88) Four Character ID (EPN) ZIMM Contact address swisstopo Swiss Federal Office of Topography Seftigenstrasse 264 CH-3084 Wabern Station in operation since 1993-05-01 Approx. distance to the main benchmark 9 m Web address for the site log ftp://igscb.jpl.nasa.gov/igscb/station/log Additional information GPS antenna on steel mast about 9 m above main benchmark 2. Gravity measurements 2.1. Absolute Gravity measurements Station Name Zimmerwald Station ID BES 94s (T0V GRAV) Contact address swisstopo Approx. distance to the main benchmark 12 m Web address for the site log http://www.aiub.unibe.ch/zm_earthtide.html Data available at swisstopo Type of observations SINGLE Dates of measurements 1997-10-07, 2004-03-16 Additional information Relative gravity measurements to absolute gravimeter at METAS (Wabern) semi-annually performed since Nov. 2003. 2.2. Super conducting gravimeter measurements Station Name N/A Station ID Contact address Approx. distance to the main benchmark Web address for the site log Data available at Station in operation since Additional information 2.3. Ground water Data Source N/A Reference point for height Approx. distance to the gravity benchmark(s) Type of observations (PERMANENT/DURING ABSOLUTE GRAVITY MEASUREMENTS) Date of measurement Data available at Additional information 3. Tide gauge Information Tide Gauge Station Name N/A Contact address In operation since Web address for the site log PSMSL ID Data available at Tide gauge involved in TIGA ? (YES/NO) Approx. distance to the main benchmark Additional information 4. Leveling UELN marker ID 300284 UELN height in m 897.672 in case of UELN is unavailable nat. height system ID CH_MARS / OH (scientific); CH_MARS / NIV (official) nat. height system marker ID 1186.800.0 (BES 498; T5V 800) nat. height 897.9063 (OH); 897.9150 (NIV) Data available at swisstopo Approx. distance to the main benchmark 0 m (is equivalent to the main benchmark) Additional information 1186.800.0 not yet in the official UELN 95/98 solution. Data has been provided in 2001 and is used already by UELN group at BKG. 5. Additional observations 5.1. Observation Kind of Observation SLR Station Name Zimmerwald Station ID ZIML 7810 Contact address Werner Gurtner Astronomisches Institut Universität Bern Sidlerstrasse 5 CH-3012 Bern Station in operation since 1984 Web address for the site log ftp://cddisa.gsfc.nasa.gov/pub/reports/slrlog/ Data available at http://ilrs.gsfc.nasa.gov Approx. distance to the main benchmark 16 m Type of observations PERMANENT Additional information New telescope installed in 1996 (DOMES 14001S007, old telescope DOMES 14001S001) 5.2. Observation Kind of Observation Earth tide gravity Station Name Zimmerwald Station ID BES 79* (T0V BESO) Contact address Swiss Federal Office of Topography (swisstopo) Seftigenstrasse 264 CH-3084 Wabern or Geodesy and Geodynamics Lab (GGL) Institute of Geodesy and Photogrammetry ETH, Swiss Federal Institute of Technology Station in operation since 1995 Web address for the site log http://www.aiub.unibe.ch/zm_earthtide.html Data available at swisstopo or GGL Approx. distance to the main benchmark 9 m Type of observations PERMANENT Additional information 5.x. Observation Kind of Observation Station Name Station ID Contact address Station in operation since Web address for the site log Data available at Approx. distance to the main benchmark Type of observations (SINGLE/REPEATED/TIME SERIES/PERMANENT) PERMANENT Additional information 6. Local ties Pointer to graphics describing the local network 6.1. Main benchmark to measurement techniques 1-4 (GNSS) Marker Name 1186.800.8 (L+T 88) Height difference from main benchmark to the benchmark of measurement 1 ("+" means: benchmark of measurement x is above main benchmark) dH (m) 9.189 Accuracy (mm) 2 Survey method Triangulation Data measured 1989-2004 Additional information Variations in dH in the order of 1 mm 6.2. Main benchmark to measurement techniques 1-4 (Absolute Gravity) Marker Name BES 94s (T0V GRAV) Height difference from main benchmark to the benchmark of measurement 2.1 ("+" means: benchmark of measurement x is above main benchmark) dH (m) -3.238 Accuracy (mm) 1 Survey method Leveling Data measured 2004 Additional information As another reference there is marker BES 484 (T4H D) in the same room fixed in the wall and 105 mm higher. 6.3. Main benchmark to measurement techniques 1-4 (Earth Tide Gravimeter) Marker Name BES 79* (T0V BESO) Height difference from main benchmark to the benchmark of measurement 5.2 ("+" means: benchmark of measurement x is above main benchmark) dH (m) -2.555 Accuracy (mm) 1 Survey method leveling Data measured 2004 Additional information in the same room as BES 94s (absolute gravity) 6.4. Main benchmark to measurement techniques 1-4 (Leveling) Marker Name 1186.800.0 Height difference from main benchmark to the benchmark of measurement 4 ("+" means: benchmark of measurement x is above main benchmark) dH (m) 0.000 m Accuracy (mm) 0 Survey method Definition Data measured 1995 Additional information The benchmark was chosen as the reference point for the national height system CH_MARS / OH (scientific). 6.5.1. Main benchmark to additional measurements (SLR) Marker Name ZIML 7810 Height difference from main benchmark to the benchmark of measurement 5.1 ("+" means: benchmark of measurement y is above main benchmark) dH (m) 4.189 Accuracy (mm) 2 Survey method Triangulation Data measured 1989-2004 Differential components from main benchmark to the benchmark of measurement 5.1 (ETRS89) dx (m) -13.680 (14001S001),-13.506 (14001S007) dy (m) -6.012 (14001S001), -5.986 (14001S007) dz (m) 6.242 (14001S001), 6.420 (14001S007) Accuracy (mm) 2 Survey method Triangulation Data measured 1989-2004 Additional information Variations of 14001S007 in the local ties (1996-2004) w.r.t to main marker detected in the order of 2-4 mm. 6.5.2. Main benchmark to additional measurements (Absolute Gravity) Marker Name BES 94s (T0V GRAV) Height difference from main benchmark to the benchmark of measurement 2.1 ("+" means: benchmark of measurement 5.2 is above main benchmark) dH (m) -3.238 Accuracy (mm) 1 Survey method leveling Data measured 2004 Differential components from main benchmark to the benchmark of measurement 2.1 (ETRS89) dx (m) 8.3 dy (m) -6.7 dz (m) -6.9 Accuracy (mm) 500 Survey method GPS and distance measurement Data measured 2004 Additional information precise horizontal position not estimated yet. 6.5.3. Main benchmark to additional measurements (Earth Tide Gravimeter) Marker Name BES 79* (T0V BESO) Height difference from main benchmark to the benchmark of measurement 5.2 ("+" means: benchmark of measurement 5.2 is above main benchmark) dH (m) -2.555 Accuracy (mm) 1 Survey method leveling Data measured 2004 Differential components from main benchmark to the benchmark of measurement 5.2 (ETRS89) dx (m) 6.4 dy (m) -3.9 dz (m) -5.5 Accuracy (mm) 500 Survey method GPS and distance measurement Data measured 2004 Additional information precise horizontal position not estimated yet. 7. Meteorological Data Kind of available data HUMIDITY, PRESSURE, TEMPERATURE Meteorological data available at http://www.aiub.unibe.ch/zm_metdat.html Additional information