pyrad.proc.process_sun_hits

pyrad.proc.process_sun_hits(procstatus, dscfg, radar_list=None)

monitoring of the radar using sun hits

Parameters:

• procstatus (int) – Processing status: 0 initializing, 1 processing volume, 2 post-processing

• dscfg (dictionary of dictionaries) –

  data set configuration. Accepted Configuration Keywords:

  datatype : list of string. Dataset keyword
      The input data types
  delev_max : float. Dataset keyword
      maximum elevation distance from nominal radar elevation where to
      look for a sun hit signal [deg]. Default 1.5
  dazim_max : float. Dataset keyword
      maximum azimuth distance from nominal radar elevation where to
      look for a sun hit signal [deg]. Default 1.5
  elmin : float. Dataset keyword
      minimum radar elevation where to look for sun hits [deg].
      Default 1.
  attg : float. Dataset keyword
      gaseous attenuation. Default None
  sun_position : string. Datset keyword
      The function to compute the sun position to use. Can be 'MF' or
      'pysolar'
  sun_hit_method : str. Dataset keyword
      Method used to estimate the power of the sun hit. Can be HS
      (Hildebrand and Sekhon 1974) or Ivic (Ivic 2013)
  rmin : float. Dataset keyword
      minimum range where to look for a sun hit signal [m]. Used in HS
      method. Default 50000.
  hmin : float. Dataset keyword
      minimum altitude where to look for a sun hit signal [m MSL].
      Default 10000. The actual range from which a sun hit signal will
      be search will be the minimum between rmin and the range from
      which the altitude is higher than hmin. Used in HS method. Default
      10000.
  nbins_min : int. Dataset keyword.
      minimum number of range bins that have to contain signal to
      consider the ray a potential sun hit. Default 20 for HS and 8000
      for Ivic.
  npulses_ray : int
      Default number of pulses used in the computation of the ray. If the
      number of pulses is not in radar.instrument_parameters this will be
      used instead. Used in Ivic method. Default 30
  iterations: int
      number of iterations in step 7 of Ivic method. Default 10.
  max_std_pwr : float. Dataset keyword
      maximum standard deviation of the signal power to consider the
      data a sun hit [dB]. Default 2. Used in HS method
  max_std_zdr : float. Dataset keyword
      maximum standard deviation of the ZDR to consider the
      data a sun hit [dB]. Default 2.
  az_width_co : float. Dataset keyword
      co-polar antenna azimuth width (convoluted with sun width) [deg].
      Default None
  el_width_co : float. Dataset keyword
      co-polar antenna elevation width (convoluted with sun width)
      [deg]. Default None
  az_width_cross : float. Dataset keyword
      cross-polar antenna azimuth width (convoluted with sun width)
      [deg]. Default None
  el_width_cross : float. Dataset keyword
      cross-polar antenna elevation width (convoluted with sun width)
      [deg]. Default None
  ndays : int. Dataset keyword
      number of days used in sun retrieval. Default 1
  coeff_band : float. Dataset keyword
      multiplicate coefficient to transform pulse width into receiver
      bandwidth
  frequency : float. Dataset keyword
      the radar frequency [Hz]. If None that of the key
      frequency in attribute instrument_parameters of the radar
      object will be used. If the key or the attribute are not present
      frequency dependent parameters will not be computed
  beamwidth : float. Dataset keyword
      the antenna beamwidth [deg]. If None that of the keys
      radar_beam_width_h or radar_beam_width_v in attribute
      instrument_parameters of the radar object will be used. If the key
      or the attribute are not present the beamwidth dependent
      parameters will not be computed
  pulse_width : float. Dataset keyword
      the pulse width [s]. If None that of the key
      pulse_width in attribute instrument_parameters of the radar
      object will be used. If the key or the attribute are not present
      the pulse width dependent parameters will not be computed
  ray_angle_res : float. Dataset keyword
      the ray angle resolution [deg]. If None that of the key
      ray_angle_res in attribute instrument_parameters of the radar
      object will be used. If the key or the attribute are not present
      the ray angle resolution parameters will not be computed
  AntennaGainH, AntennaGainV : float. Dataset keyword
      the horizontal (vertical) polarization antenna gain [dB].
      If None that of the attribute instrument_parameters of the radar
      object will be used. If the key or the attribute are not present
      the ray angle resolution parameters will not be computed
  

• radar_list (list of Radar objects) – Optional. list of radar objects

Returns:

• sun_hits_dict (dict) – dictionary containing a radar object, a sun_hits dict and a sun_retrieval dictionary

• ind_rad (int) – radar index