12 meter pointing model3A

mar16

Links
Intro
Taking the data
    examples of spectra and total power strips
The raw pointing errors (models removed)
    errors all datasets combined
    arrow plots of raw errors
    comparing errors of different datasets
Fitting the model
    plots of fit residuals for various datasets.
Summary:
    residual errors, beamwidths..





Intro:(top)

    Data for model3A was taken in  Feb16 and mar16.  The setup was:



Taking the data: (top)

The sources used:

source
size
dec
flux
used
With
Notes
Dates
sband
xband
Pictor_A 7' -45:46:43 29

sb

160220
3C58
9'x5'
+64:49:35
30

sb
160221
160224
3C123
28"
+29:40:14
33

sb
160222
3C461 (CasA)
5'
+584842
1448
519
sb,xb

160223
160228
160309
3C274 (VirgoA)
48"
+12:23:28
141
45
sb

160223
3C144 (Crab)
7'x5'
+22:00:52
815
547
sb,xb

160224
160227
160312
3C273
22"
+02:03:09
39
40
sb,xb
variable
160225
160229
3C405 (Cygnus A)
96"
+40:44:02
968
184
sb,xb

160229
160312

    Data was also taken with ngc5128 (CenA) but its jets caused problem with the pointing fits so it was excluded.

Examples of spectra and total power strips:

The following plot are an example of the spectra and total power strip plots (.ps) (.pdf)

Problems encountered while taking data:


The raw pointing errors: (top)

    The raw pointing errors were computed by:


    We had three  separate data sets:


    The first plots show the raw pointing errrors  for the combined data set (.ps) (.pdf):

    The 2nd set of plots  show the combined raw errors as an arrow plot (.ps) (.pdf):

Comparing the different raw data sets:

    The 3rd set of plots look at the differences in the raw errors for the 3 data  sets (.ps) (.pdf)

    processing:svn/aosoft/p12m/model/model3A/.pro

Fitting the model: (top)

    The model was fit to:
    Cross exclusion prior to each fit was:
    Plots were then made of the fit residuals by sample and az, el.
Pointing model Rms residuals
Dataset
azRms
(Amin)
elRms
(Amin)
totalRms
(Amin)
sources
used
all datasets
.546
.575
.793
8
sband
 Long strips
.555
.602
.818
8
sband
short strips
.474
.572
.743
4
xband
.318
.433
.537
4

Notes:

      processing: svn/aosoft/p12m/model/model3a/testmodel3A.pro, plotmodelres.pro 

Summary:


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