LBT-SCIDAR Status Update
Robert A. Weiss and Stefan Hippler
September 2001
- Robert has worked over the past three months on the automatic SCIDAR auto-correlation analysis, which is now working fine (i.e. in 95% of all cases)
- Users can now choose between the Maximum Entropy Method (MEM), conjugate gradients, or CLEAN algorithms for auto-correlation data inversion
- The previously slow MEM inversion has been fixed and runs now on the order of a few seconds per inversion. CLEAN takes much longer; probably due to IDL restrictions. The conjugate gradients method always takes about 30 seconds per inversion because the number of iterations is fixed (around 20000)
- Results from MEM and conjugate gradients agree to within a few percent; CLEAN seems to have some problems with generalized SCIDAR modes
- Robert is currently working on automatic SCIDAR cross-correlation analysis
- The SCIDAR data reduction computer will be ordered in October 2001
- Robert gave a talk about our combined SCIDAR/ALFA measurements in Toulouse (SPIE conference). The conference paper can be found here