== Description of the algorithms used by IPP full force stage ==

=== Inputs ===
During the skycalibration stage of stack photometry a new fiuts table is created which contains the
parameters to be used for forced photometry. 

This table has one row for each source with the following columns extracted from the cmf file.
{{{
#!rst

==========================  ===============================  =============================
**Column**                  **Value for Extended Source**    **Value for Extended Source**
==========================  ===============================  =============================
ID                                  IPP_IDET                     IPP_IDET
X                                   X_PSF                        X_EXT
Y                                   Y_PSF                        Y_EXT
FLUX                                PSF_INST_FLUX/EXPTIME        10**(-0.4*EXT_INST_MAG)
AP_RADIUS                           AP_MAG_RADIUS                AP_MAG_RADIUS
KRON_RADIUS                         MOMENTS_R1*2.5               MOMENTS_R1*2.5
PETRO_RADIUS                        PETRO_RADIUS                 PETRO_RADIUS
FIT_GALAXY                          0                            1
PSF_STAR                            PM_SOURCE_MODE_PSFSTAR       PM_SOURCE_MODE_PSFSTAR
R_MAJOR                             0                            EXT_WIDTH_MAJ
R_MINOR                             0                            EXT_WIDTH_MIN
THETA                               0                            EXT_THETA
MODEL_TYPE                          -1                           model type for best fit
INDEX                               0                            0.5 / EXT_PAR_07
==========================  ===============================  =============================
}}}
For sources with extended fits, the FIT_GALAXY column is set and paramters from the model with
the lowest EXT_CHISQ is chosen.