Copy ceilometer code from old subversion repos

AossCeilo/CONFIG.py

+"""This module holds all directory/path/URL information for metobs.ceilo
+packages.  This file should be the only place that holds this static information.
+
+This file should not do any file manipulation at all, only return strings or pass
+other static information such as what plot number goes with what data.
+
+This module will check for environment variables to create constants of PATHS
+and URL bases.  It also has functions for getting file locations for any file
+for a specified day.
+"""
+import os
+import re
+from datetime import datetime, timedelta
+from metobs.util import RODict, CONFIG as c
+
+CEILO_INCOMING_DIR = os.environ.get( 'CEILO_INCOMING_DIR', '/beach/incoming/Instrument_Data/METOBS/RIG/Ceilo/raw')
+CEILO_PRAW_DIR =     os.environ.get( 'CEILO_PRAW_DIR', '/beach/raw/aoss/ceilo')
+CEILO_CACHE_DIR =    os.environ.get( 'CEILO_CACHE_DIR', '/beach/cache/aoss/ceilo')
+CEILO_LATEST_DIR =   os.environ.get( 'CEILO_LATEST_DIR', '/beach/cache/aoss/ceilo')
+CEILO_DIR_FORMAT =   os.environ.get( 'CEILO_DIR_FORMAT', '%Y/%m')
+CEILO_ASCII_LOC =    os.environ.get( 'CEILO_ASCII_LOC', '/beach/cache/aoss/ceilo')
+CEILO_NC_LOC =       os.environ.get( 'CEILO_NC_LOC', '/beach/cache/aoss/ceilo')
+CEILO_IMG_LOC =      os.environ.get( 'CEILO_IMG_LOC', 'http://metobs.ssec.wisc.edu/pub/cache/aoss/ceilo')
+inst = 'ceilo'
+RE_DIGITS = re.compile(r'\d+')
+
+
+def get_incoming_dir():
+    "Return incoming directory for specified date"
+    return os.path.join( CEILO_INCOMING_DIR )
+
+def get_praw_dir(when = None):
+    "Return raw directory for specified date and data_type"
+    when = when or datetime.now()
+    return os.path.join( CEILO_PRAW_DIR, when.strftime( CEILO_DIR_FORMAT ) )
+
+def get_sraw_dir(when = None):
+    "Return raw directory for specified date and data_type"
+    raise NotImplementedError("This function is not used anymore, there should only be one primary storage location")
+    #when = when or datetime.now()
+    #return os.path.join( CEILO_SRAW_DIR, when.strftime( CEILO_DIR_FORMAT ) )
+
+def get_cache_dir(data_type, when = None):
+    "Return cache directory for specified date and data_type"
+    when = when or datetime.now()
+    return os.path.join( CEILO_CACHE_DIR, data_type, when.strftime( CEILO_DIR_FORMAT ) )
+
+def get_latest_dir():
+    "Return latest directory"
+    return os.path.join( CEILO_LATEST_DIR )
+
+def get_ascii_filename(when = None, site="rig", description=""):
+    "Return the standard filename of the ascii file for the specified date"
+    when = when or datetime.now()
+    return c.get_filename(site, inst, when, ext='ascii', description=description)
+
+def get_ascii_url(when = None, site="rig", description=""):
+    "Return the standard url of the ascii file for the specified date"
+    when = when or datetime.now()
+    return os.path.join(CEILO_ASCII_LOC, 'ascii', when.strftime(CEILO_DIR_FORMAT),
+            get_ascii_filename(when, site=site, description=description))
+
+def get_nc_filename(when = None, site="rig", description=""):
+    "Return the standard filename of the netCDF file for the specified date"
+    when = when or datetime.now()
+    return c.get_filename(site, inst, when, ext='nc', description=description)
+
+def get_nc_url(when = None, site="rig", description=""):
+    "Return the standard url of the netCDF file for the specified date"
+    when = when or datetime.now()
+    return os.path.join(CEILO_NC_LOC, 'nc', when.strftime(CEILO_DIR_FORMAT),
+            get_nc_filename(when, site=site, description=description))
+
+def get_img_filename(begin, end, ptype=1, tag='', site="rig", description=""):
+    "Return the standard filename of the image that goes from begin to end"
+    pname = _handle_plot_type(ptype)
+    return c.get_filename(site, inst, begin, end=end, ext="png", plotname=pname, description=description, tag=tag)
+
+def get_quicklook_filename(begin, end, ptype=1, site='rig', description=''):
+    return get_img_filename(begin, end, ptype, tag='', site=site, description=description)
+
+def get_thumbnail_filename(begin, end, ptype=1, site='rig', description=''):
+    return get_img_filename(begin, end, ptype, tag='tn', site=site, description=description)
+
+def get_img_url(begin, end, ptype=1, tag='', site="rig", description=""):
+    "Return the standard url of the image that goes from begin to end"
+    return os.path.join(CEILO_IMG_LOC, 'img', begin.strftime(CEILO_DIR_FORMAT),
+            get_img_filename(begin,end,ptype,tag=tag, site=site, description=description))
+
+def get_quicklook_url(begin, end, ptype=1, site='rig', description=''):
+    return get_img_url(begin, end, ptype, tag='', site=site, description=description)
+
+def get_thumbnail_url(begin, end, ptype=1, site='rig', description=''):
+    return get_img_url(begin, end, ptype, tag='tn', site=site, description=description)
+
+def rename_incoming(incoming_file, site='rig', description=''):
+    file_date = datetime(*tuple( [ int(x) for x in RE_DIGITS.findall(incoming_file) ] ))
+    present_date = datetime.now()
+    praw = get_praw_dir(when = file_date)
+    cache = get_cache_dir('ascii', when = file_date)
+    rn = get_ascii_filename(when = file_date, site=site, description=description)
+    remove = file_date.date() < (present_date - timedelta(days=30)).date()
+    return praw,cache,rn,remove
+
+def get_type_name():
+    return RODict({1:'Backscatter',
+            2:'Cloud Base Height',
+            3:'Vertical Visibility'})
+
+def _handle_plot_type(plottype=1):
+    if plottype == 1:
+        return ''
+    elif plottype == 2:
+        return ''
+    elif plottype == 3:
+        return ''
+    else:
+        raise ValueError("Plot type must be between 1-3")

AossCeilo/__init__.py

+__import__('pkg_resources').declare_namespace(__name__)
+__docformat__ = 'Epytext'
+
+import os
+from metobs.ceilo import CONFIG as c
+
+instrument_name = 'ceilo'
+
+def get_ascii_name(dt, site='rig'):
+    """
+    Make a standard filename for a tower ascii file.
+    
+    @type dt: datetime
+    @param dt: datetime of the url to generate.
+    @type site: str
+    @param site: Name of an implemented instrument site
+    """
+    return c.get_ascii_filename(dt)
+
+def get_nc_name(dt, site='rig'):
+    """
+    Make a standard filename for a ceilometer netcdf file.
+    
+    @type dt: datetime
+    @param dt: datetime of the url to generate.
+    @type site: str
+    @param site: Name of an implemented instrument site
+    """
+    return c.get_nc_filename(dt)
+
+def get_thumbnail_name(begin, end=None, site='rig', plottype=1):
+    """Make a standard filename for a ceilometer image thumbnail file.
+    """
+    return c.get_image_filename(begin, end, ptype=plottype, tag='tn')
+
+def get_nc_url(dt, site='rig', host=None):
+    """
+    Get a URL to a ceilometer NetCDF file.
+    
+    @type dt: datetime
+    @param dt: datetime of the url to generate.
+    @type site: str
+    @param site: Name of an implemented instrument site
+    
+    @rtype: str
+    @return: A full URL suitable for OPeNDAP access
+    """
+    return c.get_nc_url(dt)
+    
+def get_ascii_url(dt, site="rig", host=None):
+    """Get a URL to a ceilometer ASCII file on the opendap server
+    
+    @type dt: datetime
+    @param dt: datetime of the url to generate.
+    @type site: str
+    @param site: Name of an implemented instrument site
+    
+    @rtype: str
+    @return: A full URL suitible for HTTP access
+    """
+    return c.get_ascii_url(dt)
+
+def get_thumbnail_url(begin, end=None, site="rig", host=None, plottype=1):
+    return c.get_image_url(begin, end, ptype=plottype, tag='tn')
+
+def get_image_url(begin, end=None, site="rig", host=None, plottype=1):
+    return c.get_image_url(begin, end, ptype=plottype, tag='')
+
+def get_type_name():
+    return c.get_type_name()
+
+def _handle_plottype(plottype=1):
+    return c._handle_plot_type(plottype)

AossCeilo/ceilo.ncml

+<?xml version="1.0" encoding="UTF-8"?>
+<netcdf xmlns="http://www.unidata.ucar.edu/namespaces/netcdf/ncml-2.2">
+  <dimension name="time" isUnlimited="true" />
+  <dimension name="range" length="256" />
+  <dimension name="string_len" length="8" />
+  <attribute name="Conventions" type="String" value="CF-1.3" />
+  <attribute name="title" type="String" value="Rooftop Instrument Group(RIG) Ceilometer obervations" />
+  <attribute name="institution" type="String" value="University of Wisconsin
+Space Science and Engineering Center
+1225 W. Dayton St.
+Madison, WI 53706" />
+  <attribute name="source" type="String" value="surface observation" />
+  <attribute name="history" type="String" value="" />
+  <attribute name="references" type="String" value="http://metobs.ssec.wisc.edu" />
+  <attribute name="comment" type="String" value="" />
+  
+  <attribute name="site_id" type="String" value="" />
+  <attribute name="facility_id" type="String" value="" />
+  <attribute name="sample_int" type="String" value="15 seconds" />
+  <attribute name="serial_number" type="String" value="" />
+  <attribute name="Mentor_QC_Field_Information" type="String" value="For each qc field interpret the values as follows:
+
+Basic mentor QC checks (bit values):
+==========================================
+0x0 = value is within the specified range
+0x1 = value is equal to 'missing_value'
+0x2 = value is less than the 'valid_min'
+0x4 = value is greater than the 'valid_max'
+0x8 = value failed the 'valid_delta' check
+
+If the value is a 'missing_value' no min, max, or delta checks are performed.
+
+The delta checks are done by comparing each data value to the one just
+prior to it in time. If a previous data value does not exist or is a
+'missing_value' the delta check will not be performed.
+
+Note that the delta computation for multi-dimensioned data compares the
+absolute value between points in the same spatial location to the previous
+point in time.
+
+If the associated non-QC field does not contain any mentor-specified minimum,
+maximum, or delta information a qc_field is not generated.
+" />
+
+
+  <variable name="base_time" type="int">
+    <attribute name="long_name" type="String" value="Time of first record in Epoch" />
+    <attribute name="units" type="String" value="seconds since 1970-1-1 0:00:00 0:00" />
+    <attribute name="_FillValue" type="int" value="-9999" />
+  </variable>
+
+
+  <variable name="time_offset" shape="time" type="int">
+    <attribute name="long_name" type="String" value="Time offset from base_time" />
+    <attribute name="units" type="String" value="" />
+    <attribute name="_FillValue" type="int" value="-9999" />
+  </variable>
+
+
+  <variable name="time" shape="time" type="int">
+    <attribute name="long_name" type="String" value="Time offset from midnight" />
+    <attribute name="units" type="String" value="" />
+    <attribute name="_FillValue" type="int" value="-9999" />
+  </variable>
+
+
+  <variable name="range" shape="range" type="double">
+    <attribute name="long_name" type="String" value="Distance to the center of the corresponding range bin." />
+    <attribute name="units" type="String" value="m" />
+    <attribute name="missing_value" type="double" value="-9999." />
+    <attribute name="_FillValue" type="double" value="-9999." />
+    <attribute name="accuracy" type="String" value="30 meters" />
+  </variable>
+
+
+  <variable name="first_cbh" shape="time" type="double">
+    <attribute name="long_name" type="String" value="Lowest cloud base height detected." />
+    <attribute name="standard_name" type="String" value="cloud_base_altitude" />
+    <attribute name="units" type="String" value="m" />
+    <attribute name="valid_min" type="double" value="0." />
+    <attribute name="valid_max" type="double" value="7620." />
+    <attribute name="missing_value" type="double" value="-9999." />
+    <attribute name="_FillValue" type="double" value="-9999." />
+    <attribute name="valid_min" type="double" value="0" />
+    <attribute name="valid_max" type="double" value="7620." />
+    <attribute name="description" type="String" value="  If detection_status = 1, 2 or 3,
+ lowest cloud base height measured.
+ If detection_status = 4 this value
+ will be stored as -9999 and a value
+ for vertical_visibility will be stored.
+ If detection_status = 0 or 5, -9999 will 
+ be stored for this value and vertical_visibility.
+ (5 slashes were read from field)." />
+  </variable>
+
+
+  <variable name="vertical_visibility" shape="time" type="double">
+    <attribute name="long_name" type="String" value="Vertical visibility" />
+    <attribute name="standard_name" type="String" value="visibility_in_air" />
+    <attribute name="units" type="String" value="m" />
+    <attribute name="valid_min" type="double" value="0." />
+    <attribute name="valid_max" type="double" value="7620." />
+    <attribute name="missing_value" type="double" value="-9999." />
+    <attribute name="_FillValue" type="double" value="-9999." />
+    <attribute name="description" type="String" value="This field will only be stored if detection_status
+ is = 4. In all other cases, a value of -9999 will
+ be recorded." />
+  </variable>
+
+
+  <variable name="second_cbh" shape="time" type="double">
+    <attribute name="long_name" type="String" value="Second lowest cloud base height" />
+    <attribute name="standard_name" type="String" value="cloud_base_altitude" />
+    <attribute name="units" type="String" value="m" />
+    <attribute name="missing_value" type="double" value="-9999." />
+    <attribute name="_FillValue" type="double" value="-9999." />
+    <attribute name="valid_min" type="double" value="0" />
+    <attribute name="valid_max" type="double" value="7620." />
+    <attribute name="description" type="String" value="  If detection_status = 2 or 3, a second
+ cloud base was detected. This value is
+ the distance from the ground to the second
+ cloud base.
+ If detection_status = 4, -9999 will be recorded
+ here and a value for alt_highest_signal
+ will be recorded.
+ If detection_status = 5, -9999 will be recorded
+ for this value and for alt_highest_signal" />
+  </variable>
+
+
+  <variable name="alt_highest_signal" shape="time" type="double">
+    <attribute name="long_name" type="String" value="Altitude of highest signal" />
+    <attribute name="units" type="String" value="m" />
+    <attribute name="missing_value" type="double" value="-9999." />
+    <attribute name="_FillValue" type="double" value="-9999." />
+    <attribute name="valid_min" type="double" value="0" />
+    <attribute name="valid_max" type="double" value="7620." />
+    <attribute name="description" type="String" value="  If detection_status = 4, this value is the 
+distance from the ground to the highest signal
+ detected.
+ If detection_status = 0, 1, 2, 3 or 5, -9999
+ will be recorded." />
+  </variable>
+
+
+  <variable name="third_cbh" shape="time" type="double">
+    <attribute name="long_name" type="String" value="Third cloud base height" />
+    <attribute name="standard_name" type="String" value="cloud_base_altitude" />
+    <attribute name="units" type="String" value="m" />
+    <attribute name="missing_value" type="double" value="-9999." />
+    <attribute name="_FillValue" type="double" value="-9999." />
+    <attribute name="valid_min" type="double" value="0" />
+    <attribute name="valid_max" type="double" value="7620." />
+    <attribute name="description" type="String" value="  If detection_status = 3, this is the distance
+ from the ground to the base of the highest
+ cloud.
+ If detection = 0, 1, 2, 4 or 5, -9999 will be
+ stored here. In this case, ///// was read from field." />
+  </variable>
+
+
+
+
+  <variable name="sum_backscatter" shape="time" type="double">
+    <attribute name="long_name" type="String" value="SUM of detected and normalized backscatter" />
+    <attribute name="units" type="String" value="1.0 sr-1" />
+    <attribute name="valid_min" type="double" value="0." />
+    <attribute name="valid_max" type="double" value="999." />
+    <attribute name="missing_value" type="double" value="-9999." />
+    <attribute name="_FillValue" type="double" value="-9999." />
+    <attribute name="description" type="String" value="Multiplied by scaling factor 
+times 10^4. At scaling factor 100 the sum range, 
+which is 0 to 999, this corresponds to integrated 
+backscatter, which ranges from 0 to 0.0999 srad^-1" />
+  </variable>
+
+
+  <variable name="backscatter" shape="time range" type="double">
+    <attribute name="long_name" type="String" value="Backscatter" />
+    <attribute name="units" type="String" value="1.0E-7 m-1.sr-1" />
+    <attribute name="missing_value" type="double" value="-9999." />
+    <attribute name="_FillValue" type="double" value="-9999." />
+    <attribute name="description" type="String" value="Data is range and sensitivity normalized backscatter, units, (10000 - srad - km)^-1 unless otherwise scaled by
+scaling parameter.
+
+The length of each range bin corresponds to 
+  (c/2)*(200ns +/14 ns) = (approximately 30 m)." />
+  </variable>
+
+  <variable name="detection_status" shape="time" type="int">
+    <attribute name="long_name" type="String" value="Detection status." />
+    <attribute name="missing_value" type="int" value="-9999" />
+    <attribute name="_FillValue" type="int" value="-9999" />
+    <attribute name="valid_min" type="int" value="0" />
+    <attribute name="valid_max" type="int" value="5" />
+    <attribute name="description" type="String" value="0=No significant backscatter
+1=One cloud base detected
+2=Two cloud bases detected
+3=Three cloud bases detected
+4=Full obscuration determined but no cloud
+  base detected.
+5=Some obscuration detected but determined
+  to be transparent." />
+  </variable>
+
+
+  <variable name="status_flag" shape="time" type="char">
+    <attribute name="long_name" type="String" value="Ceilometer status indicator." />
+    <attribute name="missing_value" type="char" value=" " />
+    <attribute name="description" type="String" value="Warning and alarm information as follows
+      0 = Self-check OK
+      W = At least one Warning active, no Alarms
+      A = At least one Alarm active" />
+  </variable>
+
+
+  <variable name="laser_pulse_energy" shape="time" type="double">
+    <attribute name="long_name" type="String" value="Laser pulse energy" />
+    <attribute name="units" type="String" value="%" />
+    <attribute name="valid_min" type="double" value="0." />
+    <attribute name="valid_max" type="double" value="999." />
+    <attribute name="missing_value" type="double" value="-9999." />
+    <attribute name="_FillValue" type="double" value="-9999." />
+    <attribute name="comment" type="String" value="Percentage of nominal factory setting." />
+  </variable>
+
+
+
+
+  <variable name="laser_temperature" shape="time" type="double">
+    <attribute name="long_name" type="String" value="Laser temperature" />
+    <attribute name="units" type="String" value="degC" />
+    <attribute name="valid_min" type="double" value="-50." />
+    <attribute name="valid_max" type="double" value="99." />
+    <attribute name="missing_value" type="double" value="-9999." />
+    <attribute name="_FillValue" type="double" value="-9999." />
+  </variable>
+
+
+
+
+  <variable name="receiver_sensitivity" shape="time" type="double">
+    <attribute name="long_name" type="String" value="Receiver sensitivity" />
+    <attribute name="units" type="String" value="%" />
+    <attribute name="valid_min" type="double" value="0." />
+    <attribute name="valid_max" type="double" value="999." />
+    <attribute name="missing_value" type="double" value="-9999." />
+    <attribute name="_FillValue" type="double" value="-9999." />
+    <attribute name="comment" type="String" value="Percentage of nominal factory setting." />
+  </variable>
+
+
+  <variable name="window_contamination" shape="time" type="double">
+    <attribute name="long_name" type="String" value="Window contamination" />
+    <attribute name="units" type="String" value="0.0010 V" />
+    <attribute name="valid_min" type="double" value="0." />
+    <attribute name="valid_max" type="double" value="2500." />
+    <attribute name="_FillValue" type="double" value="-9999." />
+    <attribute name="comment" type="String" value="Millivolts measured at the internal ADC input" />
+  </variable>
+
+
+  <variable name="tilt_angle" shape="time" type="double">
+    <attribute name="long_name" type="String" value="Tilt angle" />
+    <attribute name="units" type="String" value="degrees" />
+    <attribute name="valid_min" type="double" value="-15." />
+    <attribute name="valid_max" type="double" value="90." />
+    <attribute name="valid_delta" type="double" value="1." />
+    <attribute name="missing_value" type="double" value="-9999." />
+    <attribute name="_FillValue" type="double" value="-9999." />
+    <attribute name="description" type="String" value="If Angle Correction is Off detection values are distances not altitudes" />
+  </variable>
+
+
+
+
+  <variable name="background_light" shape="time" type="double">
+    <attribute name="long_name" type="String" value="Background light" />
+    <attribute name="units" type="String" value="0.0010 V" />
+    <attribute name="valid_min" type="double" value="0." />
+    <attribute name="valid_max" type="double" value="2500." />
+    <attribute name="missing_value" type="double" value="-9999." />
+    <attribute name="_FillValue" type="double" value="-9999." />
+    <attribute name="comment" type="String" value="Millivolts measured at the internal ADC input" />
+  </variable>
+
+
+  <variable name="measurement_parameters" shape="time string_len" type="char">
+    <attribute name="long_name" type="String" value="6 character string describing instrument measurement parameters" />
+    <attribute name="missing_value" type="String" value="-" />
+    <attribute name="comment" type="String" value="(L)ong/(S)hort - (F)req - pulse qty r ^(7) + 1
+ - gain (H)igh/(L)ow - bandwidth (N)arrow/(W)ide - 
+sampling (5) / (1)0 / (2)0 Mhz" />
+  </variable>
+
+
+  <variable name="status_string" shape="time string_len" type="char">
+    <attribute name="long_name" type="String" value="Warning and alarm status bits" />
+    <attribute name="missing_value" type="String" value="-" />
+    <attribute name="comment1" type="String" value="Has Form  FEDCBA98. Each character is a hexadecimal representation of
+four bits, altogether 32 bits. See additional comments for interpretation." />
+    <attribute name="commentF" type="String" value="(8000 0000) = Laser temperature shut-off(A)
+(4000 0000)= Laser failure(A)
+(2000 0000)= Receiver failure(A)
+(1000 0000)= Voltage failure(A)" />
+    <attribute name="commentE" type="String" value="(0800 0000) = Profile error(A)" />
+    <attribute name="commentD" type="String" value="(0080 0000) = Window contaminated(W)
+(0040 0000)= Battery low(W)
+(0020 0000)= Laser power low(W)
+(0010 0000)= Laser temperature high or low(W)" />
+    <attribute name="commentC" type="String" value="(0008 0000) = Internal temperature high or low(W)
+(0004 0000)= Voltage high or low(W)
+(0002 0000)= Relative humidity is > 85 % (W)
+(0001 0000)= Receiver optical cross-talk compensation poor(W)" />
+    <attribute name="commentB" type="String" value="(0000 8000) = Fan suspect(W)
+(0000 4000)= Profile warning(W)" />
+    <attribute name="commentA" type="String" value="(0000 0800) = Blower is ON
+(0000 0400)= Blower heater is ON
+(0000 0200)= Internal heater is ON
+(0000 0100)= Units are METERS if ON, else FEET." />
+    <attribute name="comment9" type="String" value="(0000 0080) = Polling mode is ON
+(0000 0040)= Working from battery
+(0000 0020)= Single sequence mode is ON
+(0000 0010)= Manual Settings are effective." />
+    <attribute name="comment8" type="String" value="(0000 0008) = Tilt angle is > 45 degrees." />
+  </variable>
+
+
+  <variable name="lat" type="double">
+    <attribute name="standard_name" type="String" value="latitude" />
+    <attribute name="long_name" type="String" value="north latitude" />
+    <attribute name="units" type="String" value="degrees_north" />
+    <attribute name="valid_min" type="double" value="-90." />
+    <attribute name="valid_max" type="double" value="90." />
+    <attribute name="_FillValue" type="double" value="-9999." />
+  </variable>
+
+
+  <variable name="lon" type="double">
+    <attribute name="standard_name" type="String" value="longitude" />
+    <attribute name="long_name" type="String" value="east longitude" />
+    <attribute name="units" type="String" value="degrees_east" />
+    <attribute name="valid_min" type="double" value="-180." />
+    <attribute name="valid_max" type="double" value="180." />
+    <attribute name="_FillValue" type="double" value="-9999." />
+  </variable>
+
+
+  <variable name="alt" type="double">
+    <attribute name="standard_name" type="String" value="altitude" />
+    <attribute name="long_name" type="String" value="altitude" />
+    <attribute name="positive" type="String" value="up" />
+    <attribute name="units" type="String" value="m" />
+    <attribute name="_FillValue" type="double" value="-9999." />
+  </variable>
+
+  <variable name="qc_time" shape="time" type="int">
+    <attribute name="long_name" type="String" value="Results of quality checks on sample time" />
+    <attribute name="description" type="String" value="The qc_time values are calculated by comparing each sample
+time with the previous time (i.e. delta_t = t[n] - t[n-1]).
+If the 'qc_check_prior' flag is set the first sample time
+from a new raw file will be compared against the time just
+previous to it in the stored data. If the 'qc_check_prior'
+flag is not set the qc_time value for the first sample time
+will be set to 0
+
+The qc_time bit values are as follows:
+=========================================================
+0x0 = delta time is within the specified range
+0x1 = delta time is equal to 0, duplicate sample times
+0x2 = delta time is less than the 'delta_t_lower_limit'
+0x4 = delta time is greater than the 'delta_t_upper_limit'
+
+" />
+    <attribute name="delta_t_lower_limit" type="int" value="12" />
+    <attribute name="delta_t_upper_limit" type="int" value="18" />
+    <attribute name="prior_sample_flag" type="int" value="1" />
+    <attribute name="_FillValue" type="int" value="-9999" />
+  </variable>
+  
+  <variable name="qc_first_cbh" shape="time" type="int">
+    <attribute name="long_name" type="String" value="Quality check results on field: Lowest cloud base height detected." />
+    <attribute name="_FillValue" type="int" value="-9999" />
+  </variable>
+
+  <variable name="qc_vertical_visibility" shape="time" type="int">
+    <attribute name="long_name" type="String" value="Quality check results on field: Vertical visibility" />
+    <attribute name="_FillValue" type="int" value="-9999" />
+  </variable>
+
+  <variable name="qc_second_cbh" shape="time" type="int">
+    <attribute name="long_name" type="String" value="Quality check results on field: Second lowest cloud base height" />
+    <attribute name="_FillValue" type="int" value="-9999" />
+  </variable>
+  
+  <variable name="qc_alt_highest_signal" shape="time" type="int">
+    <attribute name="long_name" type="String" value="Quality check results on field: Altitude of highest signal" />
+    <attribute name="_FillValue" type="int" value="-9999" />
+  </variable>
+  
+  <variable name="qc_third_cbh" shape="time" type="int">
+    <attribute name="long_name" type="String" value="Quality check results on field: Third cloud base height" />
+    <attribute name="_FillValue" type="int" value="-9999" />
+  </variable>
+  
+  <variable name="qc_laser_pulse_energy" shape="time" type="int">
+    <attribute name="long_name" type="String" value="Quality check results on field: Laser pulse energy" />
+    <attribute name="_FillValue" type="int" value="-9999" />
+  </variable>
+  
+  <variable name="qc_laser_temperature" shape="time" type="int">
+    <attribute name="long_name" type="String" value="Quality check results on field: Laser temperature" />
+    <attribute name="_FillValue" type="int" value="-9999" />
+  </variable>
+