See the 2010-12-09 meeting minutes for background on this issue. In summary, there has been some recent work on the problem of finding viable amplitude calibration sources which will allow ALMA to meet its absolute amplitude calibration specification. See the amplitude calibration source wiki page for further information. This work has resulted in a renewed focus on the potential for giant stars as flux calibration standards. It would be useful to get an update from AIV/CSV regarding progress on the plan submitted by Martin Cohen and Jeff Mangum to conduct test measurements of some of the brighter giant stars.
Stuartt notes that the giant star test measurements submitted by Martin Cohen and JGM are still in the queue. Prospects for getting these observed in the next one to two months are good.
Rudiger wondered whether it would be better to observe Bands 7 and 9 (and 6?) rather than Band 3. Apparently the performance of the higher frequency bands is significantly better than spec. Martin agrees that doing the higher frequency bands rather than Band 3 would be a better choice given this new information.
Rudiger notes that if we do Band 9 this can be compared to Planck/Herschel.
Ancilliary Measurement Devices
Weather Station (P,T,RH,Ws,Wd) Instrumentation
No new news on this topic. Al notes that installation of the production weather stations is being tracked on JIRA at AIVMAN-2519.
Acceptance: LeonardoTesti notes that a successful acceptance meeting was held for this device. A few AIs to contend with, but no major problems raised. Need now to figure out how to use these measurements in the ALMA system.