======  Discussion of observations for LOFAR CS1  ======

This area is for more detailed comments about problems and tests done with specific observations.  Start a new subsection for your favorite observation!

===== L2007_03693 =====
Studied reflected signal of Italian TV station in SB3 (channel 179).  Found roughly 20 individual events of different durations (0.1-4 s) and shapes (FRED profile to broad lump).  See more in presentation by Casey at August
[[http://usg.lofar.org/doku.php?id=documents:minutes:2007:2007-08-29_cs-1_meeting | CS1 meeting]].


===== L2007_03453 =====

reflections of distant TV stations seen with LBA at 200MHz on subbands 247,282,283,319

=====  L2007_02339  =====
Sarod used this data set to make the deep, all-sky map named ??.  The MeqTrees .tdl.conf file is below:


=====  L2007_02333  =====
  * Position error in images from first subband is gone.  I assume reference frequency error was fixed.  (casey)

=====  L2007_02216  =====
  * Phase wrap problem disappeared.  Why?
  * Dipole number 15x now works.
  * First subband of each MS has shift in positions. Sarod says this is caused by an error in the reference frequency for the first subband of each MS. (casey)

=====  L2007_02113  =====
  * Phase wrap problem with CS016.  All baselines between CS016 dipoles and non-CS016 dipoles have a rapid change in phase with frequency.  About twelve turns of phase are observed across the 256*0.6 kHz subbands.  
  * Closure phase experiment for phase wrap problem:  add phases along three baselines (e.g., 1-13 + 13-14 + 14-1).  This sum is constant, which suggests that the phase wrap is related to a delay problem between CS016 and the other stations.  It probably does not occur in the correlator.  (Can someone confirm this?)
  * Dipole number 15x is turned off.
  * First subband of each MS has shift in positions.  Sarod says this is caused by an error in the reference frequency for the first subband of each MS. (casey)

=====  L2007_02092  =====
  * Phase wrap problem first of CS016 first seen?