def calcEffWavelen(hardware, title, throughputDir=None):
photParams = PhotometricParameters()
lsstDefaults = LSSTdefaults()
atmos = {}
stdAtmoFile = os.path.join(os.getenv('SYSENG_THROUGHPUTS_DIR'),
'siteProperties/pachonModtranAtm_12.dat')
atmos['std'] = Bandpass()
atmos['std'].readThroughput(stdAtmoFile)
multiAtmos = False
if throughputDir is None:
throughputDir = os.getenv('THROUGHPUTS_DIR')
if throughputDir is not None:
multiAtmos = True
Xarr = np.arange(1.0, 2.55, 0.1)
for X in Xarr:
atmos['%.1f' % X] = Bandpass()
atmos['%.1f' % X].readThroughput(
os.path.join(throughputDir,
'atmos/atmos_%d.dat' % (int(X * 10))))
atmoskeys = sorted(atmos.keys())
print title
print ' %s' % (' '.join(atmoskeys))
system = Bandpass()
effsb = {}
for f in ['u', 'g', 'r', 'i', 'z', 'y']:
writestring = '%s ' % f
for k in atmoskeys:
system.wavelen, system.sb = hardware[f].multiplyThroughputs(
atmos[k].wavelen, atmos[k].sb)
effphi, effsb[k] = system.calcEffWavelen()
writestring += '%.2f ' % (effsb[k])
print writestring
def calcEffWavelen(hardware, title, throughputDir=None):
photParams = PhotometricParameters()
lsstDefaults = LSSTdefaults()
atmos = {}
stdAtmoFile = os.path.join(os.getenv('SYSENG_THROUGHPUTS_DIR'), 'siteProperties/pachonModtranAtm_12.dat')
atmos['std'] = Bandpass()
atmos['std'].readThroughput(stdAtmoFile)
multiAtmos = False
if throughputDir is None:
throughputDir = os.getenv('THROUGHPUTS_DIR')
if throughputDir is not None:
multiAtmos = True
Xarr = np.arange(1.0, 2.55, 0.1)
for X in Xarr:
atmos['%.1f' %X] = Bandpass()
atmos['%.1f' %X].readThroughput(os.path.join(throughputDir,
'atmos/atmos_%d.dat' %(int(X*10))))
atmoskeys = sorted(atmos.keys())
print title
print ' %s' %(' '.join(atmoskeys))
system = Bandpass()
effsb = {}
for f in ['u', 'g', 'r', 'i', 'z', 'y']:
writestring = '%s ' %f
for k in atmoskeys:
system.wavelen, system.sb = hardware[f].multiplyThroughputs(atmos[k].wavelen, atmos[k].sb)
effphi, effsb[k] = system.calcEffWavelen()
writestring += '%.2f ' %(effsb[k])
print writestring
def Load_Atmosphere(self, airmass=1.2):
self.airmass = airmass
if self.airmass > 0.:
atmosphere = Bandpass()
#official atmospheric simulation
if not self.libradtran:
path_atmos = os.path.join(self.atmosDir,
'atmos_%d.dat' % (self.airmass * 10))
if os.path.exists(path_atmos):
atmosphere.readThroughput(
os.path.join(self.atmosDir,
'atmos_%d.dat' % (self.airmass * 10)))
else:
atmosphere.readThroughput(
os.path.join(self.atmosDir, 'atmos.dat'))
self.atmos = Bandpass(wavelen=atmosphere.wavelen,
sb=atmosphere.sb)
else: # with libradtran
path, thefile = ProcessSimulationaer(airmass, atm_pwv,
atm_ozone, atm_wl0,
atm_aer)
#path,thefile=ProcessSimulation(am,pwv,ozone)
atmdata = np.loadtxt(os.path.join(path, thefile))
wl = atmdata[:, 0]
atm = atmdata[:, 1]
func = interp1d(wl, atm, kind='linear')
transm = func(WL)
atmosphere.wavelen = WL
atmosphere.sb = transm
self.atmos = Bandpass(wavelen=WL, sb=transm)
for f in self.filterlist:
wavelen, sb = self.lsst_system[f].multiplyThroughputs(
atmosphere.wavelen, atmosphere.sb)
self.lsst_atmos[f] = Bandpass(wavelen=wavelen, sb=sb)
if self.aerosol:
atmosphere_aero = Bandpass()
atmosphere_aero.readThroughput(
os.path.join(self.atmosDir,
'atmos_%d_aerosol.dat' % (self.airmass * 10)))
self.atmos_aerosol = Bandpass(wavelen=atmosphere_aero.wavelen,
sb=atmosphere_aero.sb)
for f in self.filterlist:
wavelen, sb = self.lsst_system[f].multiplyThroughputs(
atmosphere_aero.wavelen, atmosphere_aero.sb)
self.lsst_atmos_aerosol[f] = Bandpass(wavelen=wavelen,
sb=sb)
else:
for f in self.filterlist:
self.lsst_atmos[f] = self.lsst_system[f]
self.lsst_atmos_aerosol[f] = self.lsst_system[f]
def read_filtersonly(shift_perc=None):
# read the filter throughput curves only (called from read_hardware as well)
# apply a shift of +shift_perc/100 * eff_wavelength to the wavelengths of the filter.
filterdir = os.getenv("LSST_THROUGHPUTS_DEFAULT")
filters = {}
for f in filterlist:
filters[f] = Bandpass()
filters[f].readThroughput(os.path.join(filterdir, "filter_" + f + ".dat"))
effwavelenphi, effwavelensb = filters[f].calcEffWavelen()
if shift_perc != None:
shift = effwavelensb * shift_perc/100.0
print f, shift
filters[f].wavelen = filters[f].wavelen + shift
filters[f].resampleBandpass()
return filters
def read_hardware(shift_perc=None):
# read system (hardware) transmission, return dictionary of system hardware (keyed to filter)
filterdir = os.getenv("LSST_THROUGHPUTS_DEFAULT")
hardware = ("detector.dat", "m1.dat", "m2.dat", "m3.dat", "lens1.dat", "lens2.dat", "lens3.dat")
# Read in the standard components, but potentially shift the filter by shift_perc percent.
filters = read_filtersonly(shift_perc=shift_perc)
sys = {}
for f in filterlist:
sys[f] = Bandpass()
# put together the standard component list
tlist = []
for t in hardware:
tlist.append(os.path.join(filterdir, t))
# read in the standard components, combine into sys
sys[f].readThroughputList(tlist)
# multiply by the filter throughput for final hardware throughput (no atmosphere)
sys[f].wavelen, sys[f].sb = sys[f].multiplyThroughputs(filters[f].wavelen, filters[f].sb)
return sys
def Set_Atmosphere(self, airmass, wavelenatm, transmatm):
self.airmass = airmass
if self.airmass > 0.:
atmosphere = Bandpass()
# interpolation
func = interp1d(wavelenatm, transmatm, kind='linear')
transm = func(WL)
atmosphere.wavelen = WL
atmosphere.sb = transm
self.atmos = Bandpass(wavelen=WL, sb=transm)
# loop on filters to update effective throughput
for f in self.filterlist:
wavelen, sb = self.lsst_system[f].multiplyThroughputs(
atmosphere.wavelen, atmosphere.sb)
self.lsst_atmos[f] = Bandpass(wavelen=wavelen, sb=sb)
plt.ylim(0, 1)
plt.xlim(300, 1100)
plt.xlabel('Wavelength (nm)')
plt.ylabel('Fractional Throughput Response')
plt.title('System total response curves %s' %(title))
return m5
if __name__ == '__main__':
# Set the directories for each component.
# Note that this sets the detector to be the 'generic detector' (minimum of each vendor).
throughputDir = os.getenv('LSST_THROUGHPUTS_DEFAULT')
defaultDirs = bu.setDefaultDirs()
# Build the system and hardware throughput curves (without aerosols, with X=1.0).
atmosphere = bu.readAtmosphere(defaultDirs['atmosphere'], atmosFile='atmos_10_aerosol.dat')
hardware = {}
system = {}
for f in ['u', 'g', 'r', 'i', 'z', 'y']:
hardware[f] = Bandpass()
system[f] = Bandpass()
hardware[f].readThroughputList(componentList=['detector.dat', 'filter_'+f+'.dat','lens1.dat', 'lens2.dat', 'lens3.dat', 'm1.dat', 'm2.dat', 'm3.dat'],
rootDir=throughputDir)
system[f].wavelen, system[f].sb = hardware[f].multiplyThroughputs(atmosphere.wavelen, atmosphere.sb)
m5 = calcM5(hardware, system, atmosphere, title='')
plt.show()
plt.title('System total response curves %s' % (title))
return m5
if __name__ == '__main__':
# Set the directories for each component.
# Note that this sets the detector to be the 'generic detector' (minimum of each vendor).
throughputDir = os.getenv('LSST_THROUGHPUTS_DEFAULT')
defaultDirs = bu.setDefaultDirs()
# Build the system and hardware throughput curves (without aerosols, with X=1.0).
atmosphere = bu.readAtmosphere(defaultDirs['atmosphere'],
atmosFile='atmos_10_aerosol.dat')
hardware = {}
system = {}
for f in ['u', 'g', 'r', 'i', 'z', 'y']:
hardware[f] = Bandpass()
system[f] = Bandpass()
hardware[f].readThroughputList(componentList=[
'detector.dat', 'filter_' + f + '.dat', 'lens1.dat', 'lens2.dat',
'lens3.dat', 'm1.dat', 'm2.dat', 'm3.dat'
],
rootDir=throughputDir)
system[f].wavelen, system[f].sb = hardware[f].multiplyThroughputs(
atmosphere.wavelen, atmosphere.sb)
m5 = calcM5(hardware, system, atmosphere, title='')
plt.show()