From: <Jim.Lovell_at_email.protected>
Date: Fri, 4 Nov 2005 09:01:37 +1100

Hi Brett,

The most important remaining experiment is V187b. It's a polarisation
experiment and requires the dual pol X-band receiver. My suggestion
would be to drop everything and concentrate on bringing the X-bad
receiver on line (weather permitting!) in time for V187b. Roopesh may
comment on whether single-pol X-band at Hpbart is still useful. The
intervening experiments are tests, so are less important (the NZ
fringe check VT03d mostly needs big antennas) but V187b is a well
ranked proposal and should take priority.

Cheers,
Jim

--
Dr Jim Lovell,                                      Jim.Lovell_at_csiro.<!--nospam-->au
CSIRO Australia Telescope National Facility       Ph:    (02) 6125 6715
c/o RSAA, Mt Stromlo Observatory,                 Fax:   (02) 6125 0260
Cotter Road, Weston ACT 2611                      Mobile:   0412 127364
Australia                    http://www.atnf.csiro.au/people/Jim.Lovell
At Tidbinbilla Ph (02) 6201 7842 (RA Lab), x7800 (switch), x7940(shift)
On 04/11/2005, at 8:07 AM, Brett Reid wrote:
> Hobart update
>
> Power was off in the Hanslow Road area in Cambridge near the
> Radiotelescope between 4am and 6:15 am.
> I noticed tree branches down in lots of places during the drive  
> over and
> the broadcast stations and street lighting had numerous interruptions.
> The antenna is still wind stowed.
> The diesel ran during the power interuption, powering our cryo  
> compressor
> and S/X receiver. Unfortunately the L band receiver and dual pol X  
> band
> receiver's cryodynes were not connected and have warmed. To recool  
> either
> or both the receivers we need to take the vacuum pump to the focus.  
> To do
> this we need the wind to die down. We need a day to cool the X band  
> and a
> several hours of calmer weather to cool the L band. We have found
> previously that we cannot detect sources in single dish mode when  
> either
> of these receivers are warm.
>
> We feel it is best to observe with the S/X RHC only for v187b if we  
> are
> not able to cool the dual pol X band receiver.
> We will try and get the L band as cold as we can once it is safe to  
> do so.
> If any one, such as affected PIs, has some input as to which  
> receiver to
> concentrate on getting cold, given the above constraints and the
> remaining experiments, then please let me know.
>
> Cheers,
> Brett and Jamie McCallum.
>
> Current weather warning follows:
>
> IDT28100
> Australian Government Bureau of Meteorology
> Tasmania
>
> TOP PRIORITY FOR IMMEDIATE BROADCAST
> SEVERE WEATHER WARNING
> for Damaging Winds
> For people throughout Tasmania
> Issued at 4:25 am on Friday 4 November 2005
>
> Synoptic Situation: A low pressure system south of Tasmania is  
> slowly moving
> away.
>
> West to northwest winds strong enough to bring down some tree branches
> and power
> lines are expected over Tasmania, particularly southern areas, this  
> morning.
> Conditions are expected to steadily improve during the morning
>
> The maximum wind gust is expected to be about 110 km/h.
>
> The State Emergency Service advises that people should secure loose  
> outside
> items.
>
>
> The next warning is due to be issued by 11:00am Friday
>
> This warning is also available through TV and Radio broadcasts; the  
> Bureau's
> website at www.bom.gov.au or call 1300 659 216. The Bureau and  
> State Emergency
> Service would appreciate this warning being broadcast regularly.
>
>
>
>
>
> Brett Reid
> Observatory Manager, Radio Telescopes
> University of Tasmania
> School of Mathematics and Physics
> phone + 61 3 6248 5285
> email brett.reid_at_utas.<!--nospam-->edu.au
> web http://www-ra.phys.utas.edu.au/~breid/

Received on 2005-11-04 09:02:00