= SAS37 Calibration =

There are 2 databases to be calibrated, SAS37 and SAS37.diff, they will have different calibration techniques

== SAS37 Diff ==

Generically, calibration of 3pi / MD has consisted of  (see trunk/tools/dvodb_calib) :

 * addstar -resort
 * setphot  (ubercal)
 * relastro part 1 (-update-chips)
 * relastro part 2  (-update-objects)
 * relphot 

I am not sure how to implement anything except addstar -resort, which I will do as follow:

=== addstar resort ===

{{{
addstar -resort -D CAMERA GPC1 -D CATDIR (sas37.diff)
}}}

=== other steps? ===

How do I make objects?

== SAS37 (Cam/Stack/FullForce) ==

I have confusion here, so I have listed here the method gene used for SAS34/35, the method I've used previously for 3pi and MD, and the proposed method

=== Gene's SAS34 calibrations  ===

Gene has provided SAS34 calibration scripts - (run.sascals in the SAS34/35 directory)

The steps for sascal are as follows:

{{{
setphot -update -ubercal -no-metadata -D CATDIR (dir) (ubercalfile)
}}}

{{{
relphot -v -images g,r,i,z,y 
-imfreeze -mosaic 
-D MAG_LIM 32.0 
-D SIGMA_LIM 0.1 
-D STAR_TOOFEW 1 
-D STAR_CHISQ 20.0 
-D IMAGE_OFFSET 2.0 
-D CAMERA gpc1 
-nloop 15 
-basic-image-search 
-statmode WT_MEAN 
-max-density 3000 
-cloud-limit 0.5 
-region 320 340 -10 10 
-boundary-tree tess.3pi.fits 
-D CATDIR $catdir 
-update
}}}  

{{{
relastro -images -update-chips
-v
-images -update-chips
-D CATDIR $catdir
-basic-image-search
-update
-D RELASTRO_SRC_MEAS_TOOFEW 1
-D RELASTRO_SIGMA_LIM 0.05
-dcr-blue-color g i
-dcr-red-color  z y
-statmode INNER_MEAN
}}}
 
=== Old way of SAS / MD / 3pi calibrations ===

The steps from calibrating 3pi V1, MD PV2 are as follows :

{{{
addstar -resort -D CAMERA GPC1 -D CATDIR (sas37)
}}}

{{{
setphot -update -ubercal -no-metadata -D CATDIR (dir) (ubercalfile)
}}}

{{{
relastro -region (region) -D CATDIR (catdir)
-update-chips
-D RELASTRO_SRC_MEAS_TOOFEW 1
-D RELASTRO_SIGMA_LIM 0.1
-nloop 6
-basic-image-search
-reset
-update
-parallel
-max-density 2000
-threads 4
-v
}}}

{{{
relastro -region (region) -D CATDIR (catdir)
-update-objects -pmpar
-D PM_DT_MIN 1.0
-D PAR_FACTOR_MIN 0.25
-statmode WTMEAN
+photcode g,r,i,z,y,J,H,K
-update
-parallel
-reset
-v
}}}

{{{
relphot -region (region) -D CATDIR (catdir)
-images -imfreeze -mosaic
-D MAG_LIM 32.0
-D SIGMA_LIM 0.1
-D STAR_TOOFEW 1
-D STAR_CHISQ 20.0
-D IMAGE_OFFSET 2.0
-D CAMERA gpc1
-nloop 25
-basic-image-search
-update
-reset
-threads 4
-parallel
-statmode WT_MEAN
-max-density 2000
-boundary-tree ~ippdvo/tesstables/tess.3pi.fits
 g,r,i,z,y
}}}

=== The proposed method of calibration of Sas 37 ===

This is just a cut and paste of SAS34 with addstar resort added. 

I do have questions:  Why did we used to have 2 commands (one with -update-chips and one with -update-objects)? Do we still need to to both?

'''addstar resort'''

{{{
addstar -resort -D CAMERA GPC1 -D CATDIR (sas37)
}}}

'''setphot'''

 I have questions though:  Gene’s way mentions:

{{{
# Merge in the ucal smfs database:
# There are 76 smfs in the directory /data/ipp064.0/eugene/fforce.20140714/ucal.smfs which are known to ubercal
# these need to be addstar'ed into their own mini and then merged into the master dvo
}}}

How do we want to do this with SAS37? 

{{{
setphot -update -ubercal -no-metadata -D CATDIR (dir) (ubercalfile)
}}}
 
'''relphot'''

{{{
relphot -v -images g,r,i,z,y 
-imfreeze -mosaic 
-D MAG_LIM 32.0 
-D SIGMA_LIM 0.1 
-D STAR_TOOFEW 1 
-D STAR_CHISQ 20.0 
-D IMAGE_OFFSET 2.0 
-D CAMERA gpc1 
-nloop 15 
-basic-image-search 
-statmode WT_MEAN 
-max-density 3000 
-cloud-limit 0.5 
-region 320 340 -10 10 
-boundary-tree tess.3pi.fits 
-D CATDIR $catdir 
-update
}}}  

'''relastro'''

(this is the same as gene’s but much different than how I’ve done it previously)

{{{
relastro -images -update-chips
-v
-images -update-chips
-D CATDIR $catdir
-basic-image-search
-update
-D RELASTRO_SRC_MEAS_TOOFEW 1
-D RELASTRO_SIGMA_LIM 0.05
-dcr-blue-color g i
-dcr-red-color  z y
-statmode INNER_MEAN
}}}