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Updated: Wed 02 Jul 2003

Palmer Permanent GPS Observatory Site

History and Details of Palmer site:

Good history and details of the Palmer site can be found at the Arctic & Antarctic Research Center at the Scripps Institution of Oceanography.

"We have used the same antenna since start-up in May 1997 - Dorne Margolin choke ring by Ashtech. The 0.0794 m value is the fixed height relationship between the ARP and bottom of divot (MRP) in a 5/8-inch threaded stainless steel rod set in top of 10 cm diameter pipe, where the pipe length is 2.03 meters. The pipe is attached to a baseplate that is bolted to 4 stainless steel bolts embedded in bedrock to a depth of about 30 cm. The bottom of baseplate is about 20cm above rock surface.

As noted, the physical relationship of the antenna to the MRP has not changed. However, the relationship of effective phase center may have been slightly altered when in January 1999, we exchanged the Ashtech cone type antenna cover with a SCIGN dome cover."

Email from Larry Hothem, USGS, on 22 June 2000

64° 46' 30" S
64° 04' 00" W

SOPAC data from Palmer - palm

Courtesy of the Larry Hothem, USGS. More info can be found at: Southern California Integrated GPS Network (SCIGN), USGS Pasadena Field Office

Courtesy of the Space, Telecommunications, and Radioscience Laboratory (STAR Lab - Very Low Frequency Group) at Standford University.