Date: Sun, 20 May 2007 19:38:05 -0700
To: tfolkers@as.arizona.edu
From: despada@asiaa.sinica.edu.tw ( Daniel Espada )
Subject: Observer Comment Sheet

Below is the result of your feedback form.
It was submitted by Daniel Espada (despada@asiaa.sinica.edu.tw) 
Sunday, May 20, 2007 at 19:38:05
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Program:  AS-E1

Telescope: 12m

Receiver: 3mmhi (MAC and FB as backends)

DateOfRun:  4, 5, 18 and 19 May 2007

phone: +886-2-3365-2200, ext. 777

Manuals: 
-Usually the manuals are found to be out of date, and a bit confusing. 

-Wiki webpage seems to be a step forward but still not complete.


Equipment: 
-One of the receiver crashed just before the observations, they had to 
 warm, fix a seal and cool it again. 1 day and half was lost due to this, 
 but two days were kindly re-scheduled later (18-19 May).

-Channel 2 seems to be useless most of the time, very unstable. It seems 
 that tuning is very non-deterministic.

-Many bad channels are also found in FB.

-Overhead time was understimated for the amount of time that takes to 
 tune (~10 min.) plus the time that takes to check the spectrum on a 
 test source (~5 minutes more).

-Software: remote control system is outstanding.


Support:
-All the operators were found to be helpful and willing to give useful 
 comments to improve the efficiency of the observations.

-A solution to the rx problem was given quickly.


Objectives: 
-Still to analyze the data carefully, but almost all the sources have 
 been observed (85 %). However, sensitivity considerably decreases due 
 to the Ch 2 problem and this could affect to the final results 
 (tentative detections could have been confirmed).


Problems:
-Mainly ch.2 was not useful.

-Overheads due to re-tuning, could be more efficient for this kind of 
 extragalactic surveys.


Resolved:
-Unfortuantely ch.2 problem was not solved.


Hours_lost_weather: 
-only a few hours


Hours_lost_equipment:
-1 day and a half due to rx problem but it was re-scheduled.


Suggestions: 
-Update the cookbooks.

-Inform about the current status of the instrumentation carefully to allow
 a better quantification of the required observing time.

-More efficiency in overheads. For example, is not fully understood why it 
 is necessary to check focus everytime pointing is performed. Re-tuning 
 takes too long, probably saving the settings from previous observations 
 would be more efficient.

-Difficult to find spectral surveys for test sources. A compilation from 
 previous observations would be helpful.


Others: kuan@alioth.geos.ntnu.edu.tw