[IGSMAIL-5647]: Proposed changes at CHAT - Chatham Islands, NZ

[John Beavan]

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IGS Electronic Mail      02 Oct 20:38:25 PDT 2007      Message Number 5647
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Author: John Beavan

Dear IGS colleagues,

We are proposing to replace the IGS station CHAT with a
new station. We are seeking feedback on our proposal
from any interested parties. 

Background:

The CHAT monument is on poor ground (volcanic muds
and clays - see IGS site log) and the site has poor 
communications via telephone. 

A new seismic station is being installed later this year on 
bedrock about 25 km north of CHAT.  The seismic site 
will have VSAT communications using a newly available 
satellite. 

Proposal:

We will colocate a new GNSS site, provisionally named 
CHTI  (CHaTham Island), at the new seismic station. 

The new site will have a Trimble NetRS receiver and
Trimble Zephyr Geodetic II antenna.  The monument 
will be the UNAVCO short-braced style. 

The VSAT communications will allow real time data from 
the Chatham Islands (though with a few seconds delay 
due to the VSAT). 

We will continue to operate CHAT in parallel with CHTI
for at least a year after CHTI is operational. 

Best regards,

John
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Dr John Beavan, GNS Science - Te Pu Ao, 
1 Fairway Drive, PO Box 30368, Lower Hutt, New Zealand
Tel: +64 4 570 4641  Fax: +64 4 570 1440  Mob: 027 221 8861
Email: j.beavan at gns.cri.nz    Web: www.gns.cri.nz