1. New Iterative Method of the Azimuth Ambiguity Resolution
Dr. A. Pevtsov
National Solar Observatory

2. Magnetic field in the photosphere is not current-/force- free
HOWEVER:
Low resolution magnetograms are well represented by
the potential magnetic field
Non-potentiality increases with (higher) spatial resolution

3. (acute angle with reference)
Select/change degree
of smoothing (Box)
Potential
Field (or
Up-Down)
(first run)
Original Data
Smoothed magnetogram
Reference azimuths
Ambiguity resolution
(acute angle with reference)
(if Box > pixel)
(if Box size = pixel)
Final azimuths

6. Current problems/Advantages
need high resolution magnetograms
(low res. does not have enough pixels for iterations)
- averaging at boundary y x
Advantages:
Fast
Resolution is done in image plane (full disk magnetograms)