4. Technical Reports
4.2 Other IERS Related Technical Development Activities
Status Report of the CRL 34-m Antenna at Kashima (Hiroshi Takaba)
Antenna control system
Automatic antenna stow software was incorporated in the VLBI automatic
observation software to protect the antenna from the strong winds. A
maximum wind speed of 20m/s or a mean wind speed of 13m/s limit antenna
The five axis sub-refrector controller is being replacing and will be
available in April 1995.
1.5 GHz Receiving Syetem Good
2/8 GHz Receiving Syetem Good
5/10 GHz Receiving Syetem Problem on the vacuum of the Dewar.
15/22 GHz Receiving Syetem Good
43 GHz Receiving Syetem A new system using an SIS mixer was installed.
A new VLBA data recorder was installed. The Mark-IIIa mode C is available
using the VLBA data recorder.
An automatic tape changer system (Digital Mass Strage DMS-24) became
available. Up to 24 K-4 tapes are automatically changed and about one week's
automatic observation become possible with the normal 64Mbps recording mode.
Q: How earthquake-proof is the performance?
A: The specifications state says seismic intensity 6 (about 400 Gal)
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