def restoreFocus( ) :
antList = SAC.currentAntennaNumbers()
for ant in antList :
SAC.focus( None, None, f0[ant-1], ant )
if focusMoving( antList) :
print "hey - timed out and a focus is still changing!"
def refocus( antList, outfile, startNominal=True, apply=False ) :
"""
Syntax:
refocus( antList, outfile, startNominal=True, apply=False )
Performs refocusing on all antennas included in 'antList'.
Allows outputting the results to a text file 'outfile'.
If startNominal is chosen 'False', the script starts from the
most recent focus values (the nominal focus values are fixed,
hardcoded numbers for the moment).
If apply=False, measurements will be taken (and output),
but no changes will be made to the focus of any antenna.
Example:
refocus([1,2,3,10,15],"refocus-2013-03-19.txt",startNominal=False,apply=True)
"""
pylab.clf()
pylab.ion()
outfile="/array/rt/focus/focusCurves"
offsets = numpy.array( [ -.9, -.6, -.3, 0., .3, .6, .9 ] )
offsets = numpy.array( [ -3., -2., -1.5, -1., -.5, 0., .5, 1., 1.5, 2.0, 3.0 ] )
timeout = 20.
numpy.set_printoptions(precision=2)
# for ease in querying focus values and focus status, make list of monitor point names
focusNameList = []
focusStatusNameList = []
focusOK = []
ampNameList = []
for ant in antList :
if (ant < 7) :
focusNameList.append( "Ovro%d.Secondary.zPosition" % ant )
focusStatusNameList.append( "Ovro%d.Secondary.zMovementStatus" % ant )
focusOK.append( 1 )
else :
focusNameList.append( "Bima%d.AntennaCommon.Secondary.focusZ" % (ant-6) )
focusStatusNameList.append( "Bima%d.AntennaCommon.Secondary.focusState" % (ant-6) )
focusOK.append( 0 )
ampNameList.append( 'Astro.Antenna%d.MedianAmp' % ant )
focusOK = numpy.array( focusOK )
#print focusNameList
#print focusStatusNameList
#print ampNameList
#print focusOK
# save starting focus values for all ants in subarray
if startNominal :
startFocus = numpy.zeros( len(antList), dtype=float )
j = 0
for ant in antList:
startFocus[j] = f0[ant-1]
j = j + 1
else :
startFocus = numpy.array( SAC.queryMpValues( focusNameList, nothrow=True ) )
print "startfocus : ", startFocus
fout=open( outfile, "a" )
fout.write("\n# %s\n" % (time.strftime( "%Y-%b-%d %H:%M", time.gmtime())) )
elev = SAC.queryDouble("Ovro1.AntennaCommon.Drive.Track.actualElevation", 20)
fout.write("# elev = %.2f\n" % elev)
source = SAC.queryString("Control.Subarray1.source", 20)
fout.write("# source = %s\n" % source)
lo1 = SAC.queryDouble("Control.Subarray1.loFreq", 20)
fout.write("# LO1 = %.2f\n#\n" % lo1)
fout.write("# ");
for ant in antList :
fout.write(" %7d" % ant)
fout.write("\n")
# now generate array of target focus positions
zTarg = numpy.empty( [len(offsets), len(antList)], dtype=float )
amps = numpy.zeros( [len(offsets), len(antList)], dtype=float )
# Preload all focus positions
for i in range(0, len(offsets)) :
j = 0
for ant in antList:
zTarg[i][j] = startFocus[j] + offsets[i]
j = j + 1
# now step through the focus ranges, recording selfcal amps
for i in range(0, len(offsets)) :
j = 0
for ant in antList:
#zTarg[i][j] = startFocus[j] + offsets[i]
#print "focus %d to %.3f" % (ant, zTarg[i][j])
SAC.focus( None, None, zTarg[i][j], ant )
j = j + 1
print "focus to:", zTarg[i]
t0 = time.time()
stillTuning = True
while ( (time.time() - t0) < timeout) and stillTuning :
time.sleep(4.)
zState = numpy.array( SAC.queryMpValues( focusStatusNameList, nothrow=True ), dtype=int )
print "waiting for : ", (zState - focusOK)
if numpy.array_equiv( zState, focusOK ) : stillTuning = False
print "begin integration"
SAC.integrate( integTime=10., reps=1 )
time.sleep(1)
amps[i] = SAC.queryMpValues( ampNameList, nothrow=True )
print amps
######## Plot amps retrieved so far ###########
plotamps(zTarg,amps,antList)
###############################################
fout.write(" %5.2f" % offsets[i] )
j = 0
for ant in antList :
fout.write(" %7.3f" % amps[i][j] )
j = j + 1
fout.write("\n")
bestGaussians = plotamps(zTarg, amps, antList, fitGaussian=True, plotCurves=True, returnSolutions=True)
print bestGaussians
bestFocus = numpy.zeros( [len(antList)], dtype=float )
fout.write("#\n# orig")
j = 0
for ant in antList:
fout.write(" %7.3f" % startFocus[j] )
j = j+1
fout.write("\n")
fout.write("# gfit")
j = 0
for ant in antList:
fout.write(" %7.3f" % bestGaussians[j] )
j = j+1
fout.write("\n")
fout.write("# best")
j = 0
for ant in antList:
try:
bestFocus[j] = numpy.average( zTarg[:,j], weights=amps[:,j] )
except:
print "Cannot average when all weights are zero, leaving focus position alone for antenna " + str(ant)
bestFocus[j] = startFocus[j]
bestGaussians[j] = startFocus[j]
# We now have the weighted average of amplitudes for a best focus estimate,
# as well as the gaussian fits. Time to judge the gaussian fits and see if they make sense,
# if so: adopt them if not: stick with the weighted average.
thresholdFocusChange = 0.7
if (numpy.abs(bestGaussians[j] - startFocus[j]) < thresholdFocusChange):
# We'll trust the Gaussian fit
bestFocus[j] = bestGaussians[j]
else:
# Can't trust the Gaussian fit
print "FOCUS: Antenna: %2d, Current focus: %2.1f, Gaussian fit: %2.1f" % (float(ant),startFocus[j],bestGaussians[j])
print "FOCUS: Gaussian fit recommends a change in focus above the threshold of %1.1f mm! Not using that value." % thresholdFocusChange
if (numpy.abs(bestFocus[j] - startFocus[j]) > thresholdFocusChange):
# Weighted average is too far off as well!
print "FOCUS: Antenna: %2d, Current focus: %2.1f, Weighted average: %2.1f" % (float(ant),startFocus[j],bestFocus[j])
print "FOCUS: Weighted average focus is also above threshold!"
print "FOCUS: Not changing focus."
bestFocus[j] = startFocus[j]
if (apply == True):
SAC.focus( None, None, bestFocus[j], ant )
fout.write(" %7.3f" % bestFocus[j] )
j = j+1
fout.write("\n")
fout.write("# chng")
j = 0
for ant in antList:
if (apply == True):
fout.write(" %7.3f" % (bestFocus[j]-startFocus[j]) )
else:
fout.write(" %7.3f" % 0.)
j = j+1
fout.write("\n\n")
fout.close()
print ""
print "startFocus = ", startFocus
print "bestFocus = ", bestFocus
print "change = ", (bestFocus-startFocus)
