[IGSSTATION-4486] ALIC: Antenna Change

[ryan.ruddick at ga.gov.au]

Author: Ryan Ruddick 

Geoscience Australia
Australian Regional GPS Network

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Site ID : ALIC
DOMES No: 50137M001
Location: Alice Springs (Northern Territory, AUSTRALIA)

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Dear Colleagues,

The antenna and antenna cable at the GNSS tracker ALIC were replaced at approximately 2011-07-20T00:00Z.  The previous cable was found to have small amounts of corrosion at the antenna end.  The details of the changes are as follows:

4.2  Antenna Type             : AOAD/M_T        NONE
     Serial Number            : 318
     Antenna Reference Point  : BPA
     Marker->ARP Up Ecc. (m)  : 000.0070
     Marker->ARP North Ecc(m) : 000.0000 
     Marker->ARP East Ecc(m)  : 000.0000
     Alignment from True N    : 0
     Antenna Radome Type      : NONE
     Radome Serial Number     :
     Antenna Cable Type       : (vendor & type number)
     Antenna Cable Length     : (m)
     Date Installed           : 2003-06-15T03:30Z
     Date Removed             : 2011-07-20T00:00Z
     Additional Information   : Damaged radome was removed.
     
4.3  Antenna Type             : LEIAR25.R3      NONE
     Serial Number            : 09370001
     Antenna Reference Point  : BPA
     Marker->ARP Up Ecc. (m)  : 000.0015
     Marker->ARP North Ecc(m) : 000.0000 
     Marker->ARP East Ecc(m)  : 000.0000
     Alignment from True N    : 0
     Antenna Radome Type      : NONE
     Radome Serial Number     :
     Antenna Cable Type       : LMR400
     Antenna Cable Length     : 81 m
     Date Installed           : 2011-07-20T00:00Z
     Date Removed             : (CCYY-MM-DDThh:mmZ)
     Additional Information   :

It appears that these changes have fixed the problems we were seeing with data quality from the site.  During the upgrade we also had some vegetation cleared from around the site.

All these changes are reflected in the IGS log file which has been submitted to IGS CB and is also available from the Geoscience Australia anonymous FTP server (ftp.ga.gov.au).  

Data since day of year 200 has now been submitted to IGS archives.

We apologise for any inconveniences caused.

Regards,

Ryan Ruddick
Geoscience Australia
P: +61 2 6249 9426
E: Ryan.Ruddick at ga.gov.au