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Barrow GNSS Survey System - Available Equipment

Equipment Available

A geodetic system consisting of a dual-frequency base station and roving receiver is available in Barrow. By collecting and post-processing data, centimeter-level accuracy can be realized over 100 kilometers away from Barrow. A second GPS base station in Barrow, the Barrow SuomiNet site SG27, provides a backup to the BASC base station for post-processing. Note that a separate base station is maintained by UNAVCO in Atqasuk, AK for surveys in that area. Data from site BARO, SG27, and ATQK are available on-line from the UNAVCO Data Archive. Data processing software is also available from UNAVCO.

In addition, the base station transmits real-time kinematic (RTK) broadcasts at 418 MHz (CMR+ format at 9600 baud). This provides real-time centimeter-level capability within a ~10 km radius of the BARC building. A second portable RTK radio repeater is available to assist RTK work elsewhere in the Barrow area.

The following GPS equipment is available for use in Barrow:

Trimble NetR8 GNSS Base Station
Geodetic GNSS base station for data collection and RTK broadcasting. An equipment inventory is maintained on this page.
R8 GNSS Rover Survey Systems
Geodetic GPS receiver and ancillary field equipment that provides centimeter accuracy in real-time (RTK) or through data collection and post-processing. An equipment inventory is maintained on this page.

SuomiNet auxiliary GPS base station

Barrow SuomiNet GPS Station SG27
A fixed geodetic GPS base station is located at the NOAA GMD Facility, and provides a post-processing backup to the GPS base station at BASC. RINEX data files (15 sec) are available on-line from the UNAVCO Data Archive. Higher-rate data are also available, but are only downloaded upon request and are not archived. To obtain high-rate data, fill out an online request form. Note that high-rate data is stored in a ring buffer on the receiver and will not persist indefinitely, therefore data requests should be made as soon as possible after the need is identified.

SG27 coordinates (Survey Mark):

ITRF-05, June 1 2010:
71 19' 22.4187" N 156 36' 37.1960" W 9.430m HAE

NAD-83, June 1 2010:
71 19' 22.4293" N 156 36' 37.0618" W 8.865m HAE

  • Antenna Reference Point (bottom of antenna mount) is 0.008m above Survey Mark.

Elevation above mean sea level (Survey Mark):

GEOID-99 model applied to NAD-83 coordinates, June 1 2010:
11.187m MSL


Last modified: 2019-12-24  02:12:47  America/Denver