2012.04.13_GC_Observations - david-macmahon/wiki_convert_test GitHub Wiki

GBT GC 2011 Go back

2012.04.13

All times EDT

• 04:00 - Moving to access to flip switch. Check Valon clocks, all look good. Roach 4 was at 1500 MHz from earlier work to solve PPS problem, so set back to 1440 MHz.

• 04:18 - Everything balanced to new IF optical driver target of 2 volts.

• 04:28 - Going to AutoPeakFocus on 2038+5119. Started data taking 2012.04.13_082928. Tsrc ~ 5 K, Tsys ~ 45.5 K.

• 04:37 - Started data on B2021+51. 2012.04.13_083753. Note: this has bad R1 configuration, see below.

• 04:42 - Stopped data collection, moving to 1733-1304.

• 04:47 - Started data during autopeakfocus 2012.04.13_084438

• 04:51 - Tsrc ~ 6 K Tsys ~ 50 K

• 04:54 - Moving to GC. Captued cal in 2012.04.13_085514

• 04:58 - On GC taking data (scan 13 on friday 13th)

2012.04.13_085834 - First big GC data set. note this has bad R1 configuration, same as B2021+51 data set.

• 06:04 - Stopping data taking. Found that R1 had sg_period set to 6283260 and acc_len = 768 rather than 767. This explains why B2021+51 not detected in R1. Must have gotten reconfigured during testing. Need to be more careful about ensuring proper configuration when preparing for observations.

• 06:10 - OnOff on 1733-1304 - R1 should be set up correctly now. Data in 2012.04.13_100943

• 06:12 - Stopped data taking. Going back to GC.

• 06:15 - Taking data on GC:

2012.04.13_101504 - Second big GC data set. Should have all roachs properly configured!

• 07:00 - Finished