def read_cross_sections_xy (file, commentChar):
""" Read one cross section file (xy ascii format; typically one molecule, several p,T pairs). """
# initialize list of cross sections to be returned
xsList = []
# read entire cross section file (incl. commented header lines)
try:
xyData, comments = readDataAndComments(file,commentChar)
except:
raise SystemExit, 'ERROR: reading cross section file failed (check format etc!?!)\n' + repr(file)
# parse comment header and extract some infos
need = ('pressure', 'temperature', 'molecule')
headerDict = parse_file_header (comments, need)
npT = xyData.shape[1]-1
xLimits = Interval(xyData[0,0], xyData[-1,0])
for l in range(1,npT+1):
xsList.append({'molecule': headerDict['molecule'], 'x': xLimits, 'y': xyData[:,l]})
pValues, pUnit = headerDict['pressure'][0], headerDict['pressure'][1]
pValues = unitConversion (pValues, 'pressure', pUnit)
if len(pValues)==npT:
for l in range(npT): xsList[l]['p'] = pValues[l]
TValues, TUnit = headerDict['temperature'][0], headerDict['temperature'][1]
TValues = unitConversion (TValues, 'temperature', TUnit)
if len(TValues)==npT:
for l in range(npT): xsList[l]['T'] = TValues[l]
return xsList
def read_line_file (lineFile, xLimits=None, airWidth=0.1, wingExt=0.0, molecule=None, commentChar='#'):
""" Read a simple line parameter list and return a dictionary: lines and some attributes. """
# wavenumber interval to be searched
if xLimits:
xLow, xHigh = xLimits.limits()
else:
xLow, xHigh = 0.0, 0.0
# read entire line file and return a dictionary
lines, comments = readDataAndComments (lineFile,commentChar)
# if there is just a single line in the dataset, a 1dim array is returned
lines = np.atleast_2d (lines)
# parse comment header and extract some infos
Line_Data = parse_file_header (comments, ['molecule','format','pressure','temperature'])
# check if molecule is specified (and consistent if specified in file and on command line)
if molecule and Line_Data.has_key('molecule'):
if not molecule==Line_Data['molecule']:
raise SystemExit, 'ERROR: inconsistent molecule specification! ' + \
repr(molecule) + ' <--> ' + repr(Line_Data['molecule'])
elif Line_Data.has_key('molecule'):
pass
elif molecule:
Line_Data['molecule'] = molecule
else:
print 'lineFile: ', lineFile
raise SystemExit, 'ERROR: molecule not specified (neither in line list header nor as command option)!'
# also need reference pressure and temperature
if Line_Data.has_key('temperature'):
# remove unit spec 'Kelvin'
Line_Data['temperature'] = float(split(Line_Data['temperature'])[0])
else:
raise SystemExit, 'ERROR: reference temperature of line parameters not given!'
if Line_Data.has_key('pressure'):
try: # remove unit spec 'millibar' and return pressure in cgs units!
value_unit = split(Line_Data['pressure'])
Line_Data['pressure'] = unitConversion(float(value_unit[0]), 'pressure', value_unit[1])
except StandardError,errMsg:
raise SystemExit, str(errMsg) + '\nparsing pressure spec in line file failed ' + repr(Line_Data['pressure'])
