def getopsimouts(inputobs_file , override_config_file=None, outfile=None,
verbose=False):
"""
Obtains the output of opsimObs for interesting quantities based on the input
file. This function is used in creating the ouputs converted into the simlib
file.
TODO: Actually this function should go into makelsstsims rather than here.
"""
config = setDefaultConfigs(override_config_file)
# Set up a skypos object to hold site information and provide ra/dec -> alt/az/airmass translations.
skypos = SkyPos()
skypos.setSite(lat=config['latitude'], lon=config['longitude'], height=config['height'],
pressure=config['pressure'], temperature=config['temperature'],
relativeHumidity=config['relativeHumidity'], lapseRate=config['lapseRate'])
# Set up a Weather object to read the site weather data.
t = time.time()
weather = Weather()
weather.readWeather(config)
dt, t = dtime(t)
if verbose:
print '# Reading weather required %.2f seconds' %(dt)
# Set up a Downtime object to read the downtime data.
downtime = Downtime()
downtime.readDowntime(config)
dt, t = dtime(t)
if verbose:
print '# Reading downtime required %.2f seconds' %(dt)
# Read observations.
obs = ObsFields()
obs.readInputObs(inputobs_file, config)
nobs = len(obs.ra)
dt, t = dtime(t)
if verbose:
print '# Reading %d input observations required %.2f seconds' %(nobs, dt)
# Check timing of input observations.
if config['check_observations']:
obs.checkInputObs(config)
dt, t = dtime(t)
if verbose:
print '# Checking %d input observations required %.2f seconds' %(nobs, dt)
print '# Did not check input observations for minimum required timing separation!'
# Calculate alt/az/airmass for all fields.
obs.getAltAzAirmass(skypos)
dt, t = dtime(t)
if verbose:
print '# Calculating alt/az/airmass for %d input observations required %.2f seconds' %(nobs, dt)
# Calculate weather (cloud/seeing) for all fields.
dt, t = dtime(t)
obs.getObsWeather(weather, config)
dt, t = dtime(t)
if verbose:
print '# Getting weather information for %d observations required %.2f seconds' %(nobs, dt)
# Check downtime status for these observations
obs.getDowntime(downtime, config)
# Calculate position of sun at the times of these observations.
sun = Sun()
dt, t = dtime(t)
sun.calcPos(obs.mjd)
sun.getAltAz(skypos)
dt, t = dtime(t)
if verbose:
print '# Calculating sun position at %d times required %.2f seconds' %(nobs, dt)
# Calculate the position, phase and altitude of the Moon.
moon = Moon()
moon.calcPos(obs.mjd, config)
moon.getAltAz(skypos)
dt, t = dtime(t)
if verbose:
print '# Calculating moon position at %d times required %.2f seconds' %(nobs, dt)
# Will clean this up and put into classes as time is available.
# Calculate the sky brightness.
skybright = SkyBright(model='Perry', solar_phase='ave')
sky = numpy.zeros(len(obs.mjd), 'float')
filterlist = numpy.unique(obs.filter)
for f in filterlist:
condition = (obs.filter == f)
skybright.setSkyBright(obs.alt[condition], obs.az[condition], moon.alt[condition], moon.az[condition],
moon.phase[condition], bandpass = f)
sky[condition] = skybright.getSkyBright()
"""
for i in range(len(obs.mjd)):
# Calculate sky brightness for each observation.
skybright.setSkyBright(obs.alt[i], obs.az[i], moon.alt[i], moon.az[i], moon.phase[i],
bandpass=obs.filter[i])
sky[i] = skybright.getSkyBright()
"""
# Add modification to match 'skybrightness_modified' (which is brighter in twilight)
sky = numpy.where(sun.alt > -18, 17, sky)
dt, t = dtime(t)
if verbose:
print '# Calculating the sky brightness for %d observations required %.2f seconds' %(nobs, dt)
# Calculate the 5-sigma limiting magnitudes.
maglimit = numpy.zeros(len(obs.mjd), 'float')
m5 = m5calculations()
# Read the throughput curves for LSST (needed to determine zeropoints).
m5.setup_Throughputs(verbose=False)
# Swap 'y4' for 'y' (or other default y value).
tmp_filters = m5.check_filter(obs.filter)
# Determine the unique exposure times, as have to set up dark current, etc. based on this for telescope ZP's.
exptimes = numpy.unique(obs.exptime)
for expT in exptimes:
condition = [obs.exptime == expT]
# Calculate telescope zeropoints.
# Calculate actual open-sky time, after accounting for readout time, number of exposures per visit, shutter time, etc.
opentime = ((expT - config['readout_time']*config['nexp_visit'] - config['nexp_visit']* config['add_shutter']*config['shutter_time'])
/ float(config['nexp_visit']))
print "# Calculating depth for %d exposures of %.2f open shutter time" %(config['nexp_visit'], opentime)
m5.setup_values(expTime=opentime, nexp=config['nexp_visit'])
# Calculate 5sigma limiting magnitudes.
maglimit[condition] = m5.calc_maglimit(obs.seeing[condition], sky[condition], tmp_filters[condition], obs.airmass[condition], snr=5.0)
dt, t = dtime(t)
if verbose:
print '# Calculating the m5 limit for %d observations required %.2f seconds' %(nobs, dt)
# Print out interesting values.
obs.printObs(sun, moon, sky, maglimit, config, outfile)
def run(inputobs_file, config):
# Set up a skypos object to hold site information and provide ra/dec -> alt/az/airmass translations.
skypos = SkyPos()
skypos.setSite(lat=config['latitude'], lon=config['longitude'], height=config['height'],
pressure=config['pressure'], temperature=config['temperature'],
relativeHumidity=config['relativeHumidity'], lapseRate=config['lapseRate'])
# Set up a Weather object to read the site weather data.
t = time.time()
weather = Weather()
weather.readWeather(config)
dt, t = dtime(t)
print '# Reading weather required %.2f seconds' %(dt)
# Set up a Downtime object to read the downtime data.
downtime = Downtime()
downtime.readDowntime(config)
dt, t = dtime(t)
print '# Reading downtime required %.2f seconds' %(dt)
# Read observations.
obs = ObsFields()
obs.readInputObs(inputobs_file, config)
nobs = len(obs.ra)
dt, t = dtime(t)
print '# Reading %d input observations required %.2f seconds' %(nobs, dt)
# Check timing of input observations.
if config['check_observations']:
obs.checkInputObs(config)
dt, t = dtime(t)
print '# Checking %d input observations required %.2f seconds' %(nobs, dt)
else:
print '# Did not check input observations for minimum required timing separation!'
# Calculate alt/az/airmass for all fields.
obs.getAltAzAirmass(skypos)
dt, t = dtime(t)
print '# Calculating alt/az/airmass for %d input observations required %.2f seconds' %(nobs, dt)
# Calculate weather (cloud/seeing) for all fields.
dt, t = dtime(t)
obs.getObsWeather(weather, config)
dt, t = dtime(t)
print '# Getting weather information for %d observations required %.2f seconds' %(nobs, dt)
# Check downtime status for these observations
obs.getDowntime(downtime, config)
# Calculate position of sun at the times of these observations.
sun = Sun()
dt, t = dtime(t)
sun.calcPos(obs.mjd)
sun.getAltAz(skypos)
dt, t = dtime(t)
print '# Calculating sun position at %d times required %.2f seconds' %(nobs, dt)
# Calculate the position, phase and altitude of the Moon.
moon = Moon()
moon.calcPos(obs.mjd, config)
moon.getAltAz(skypos)
dt, t = dtime(t)
print '# Calculating moon position at %d times required %.2f seconds' %(nobs, dt)
# Will clean this up and put into classes as time is available.
# Calculate the sky brightness.
skybright = SkyBright(model='Perry', solar_phase='ave')
sky = numpy.zeros(len(obs.mjd), 'float')
filterlist = numpy.unique(obs.filter)
for f in filterlist:
condition = (obs.filter == f)
skybright.setSkyBright(obs.alt[condition], obs.az[condition], moon.alt[condition], moon.az[condition],
moon.phase[condition], bandpass = f)
sky[condition] = skybright.getSkyBright()
# Add modification to match 'skybrightness_modified' (which is brighter in twilight)
sky = numpy.where(sun.alt > -18, 17, sky)
dt, t = dtime(t)
print '# Calculating the sky brightness for %d observations required %.2f seconds' %(nobs, dt)
# Calculate the 5-sigma limiting magnitudes.
maglimit = numpy.zeros(len(obs.mjd), 'float')
m5 = m5calculations()
# Read the throughput curves for LSST (needed to determine zeropoints).
m5.setup_Throughputs(verbose=False)
# Swap 'y4' for 'y' (or other default y value).
tmp_filters = m5.check_filter(obs.filter)
# Determine the unique exposure times, as have to set up dark current, etc. based on this for telescope ZP's.
exptimes = numpy.unique(obs.exptime)
for expT in exptimes:
condition = [obs.exptime == expT]
# Calculate telescope zeropoints.
# Calculate actual open-sky time, after accounting for readout time, number of exposures per visit, shutter time, etc.
opentime = ((expT - config['readout_time']*config['nexp_visit'] - config['nexp_visit']* config['add_shutter']*config['shutter_time'])
/ float(config['nexp_visit']))
print "# Calculating depth for %d exposures of %.2f open shutter time" %(config['nexp_visit'], opentime)
m5.setup_values(expTime=opentime, nexp=config['nexp_visit'])
# Calculate 5sigma limiting magnitudes.
maglimit[condition] = m5.calc_maglimit(obs.seeing[condition], sky[condition], tmp_filters[condition], obs.airmass[condition], snr=5.0)
dt, t = dtime(t)
print '# Calculating the m5 limit for %d observations required %.2f seconds' %(nobs, dt)
# Print out interesting values.
obs.printObs(sun, moon, sky, maglimit, config)
