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'''
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Created on Nov 9, 2016
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@author: roj- LouVD
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'''
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import os
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import sys
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import time
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import glob
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import datetime
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import numpy
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from schainpy.model.proc.jroproc_base import ProcessingUnit
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from schainpy.model.data.jrodata import Parameters
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from schainpy.model.io.jroIO_base import JRODataReader, isNumber
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from schainpy.utils import log
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FILE_HEADER_STRUCTURE = numpy.dtype([
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('FMN', '<u4'),
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('nrec', '<u4'),
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('fr_offset', '<u4'),
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('id', '<u4'),
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('site', 'u1', (32,))
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])
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REC_HEADER_STRUCTURE = numpy.dtype([
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('rmn', '<u4'),
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('rcounter', '<u4'),
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('nr_offset', '<u4'),
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('tr_offset', '<u4'),
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('time', '<u4'),
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('time_msec', '<u4'),
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('tag', 'u1', (32,)),
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('comments', 'u1', (32,)),
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('lat', '<f4'),
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('lon', '<f4'),
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('gps_status', '<u4'),
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('freq', '<u4'),
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('freq0', '<u4'),
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('nchan', '<u4'),
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('delta_r', '<u4'),
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('nranges', '<u4'),
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('r0', '<u4'),
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('prf', '<u4'),
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('ncoh', '<u4'),
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('npoints', '<u4'),
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('polarization', '<i4'),
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('rx_filter', '<u4'),
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('nmodes', '<u4'),
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('dmode_index', '<u4'),
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('dmode_rngcorr', '<u4'),
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('nrxs', '<u4'),
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('acf_length', '<u4'),
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('acf_lags', '<u4'),
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('sea_to_atmos', '<f4'),
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('sea_notch', '<u4'),
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('lh_sea', '<u4'),
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('hh_sea', '<u4'),
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('nbins_sea', '<u4'),
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('min_snr', '<f4'),
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('min_cc', '<f4'),
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('max_time_diff', '<f4')
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])
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DATA_STRUCTURE = numpy.dtype([
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('range', '<u4'),
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('status', '<u4'),
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('zonal', '<f4'),
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('meridional', '<f4'),
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('vertical', '<f4'),
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('zonal_a', '<f4'),
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('meridional_a', '<f4'),
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('corrected_fading', '<f4'), # seconds
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('uncorrected_fading', '<f4'), # seconds
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('time_diff', '<f4'),
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('major_axis', '<f4'),
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('axial_ratio', '<f4'),
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('orientation', '<f4'),
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('sea_power', '<u4'),
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('sea_algorithm', '<u4')
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])
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class BLTRParamReader(JRODataReader, ProcessingUnit):
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'''
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Boundary Layer and Tropospheric Radar (BLTR) reader, Wind velocities and SNR from *.sswma files
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'''
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ext = '.sswma'
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def __init__(self, **kwargs):
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ProcessingUnit.__init__(self, **kwargs)
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self.dataOut = Parameters()
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self.counter_records = 0
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self.flagNoMoreFiles = 0
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self.isConfig = False
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self.filename = None
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def setup(self,
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path=None,
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startDate=None,
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endDate=None,
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ext=None,
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startTime=datetime.time(0, 0, 0),
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endTime=datetime.time(23, 59, 59),
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timezone=0,
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status_value=0,
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**kwargs):
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self.path = path
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self.startDate = startDate
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self.endDate = endDate
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self.startTime = startTime
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self.endTime = endTime
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self.status_value = status_value
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self.datatime = datetime.datetime(1900,1,1)
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if self.path is None:
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raise ValueError, "The path is not valid"
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if ext is None:
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ext = self.ext
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self.search_files(self.path, startDate, endDate, ext)
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self.timezone = timezone
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self.fileIndex = 0
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if not self.fileList:
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raise Warning, "There is no files matching these date in the folder: %s. \n Check 'startDate' and 'endDate' " % (
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path)
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self.setNextFile()
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def search_files(self, path, startDate, endDate, ext):
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'''
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Searching for BLTR rawdata file in path
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Creating a list of file to proces included in [startDate,endDate]
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Input:
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path - Path to find BLTR rawdata files
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startDate - Select file from this date
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enDate - Select file until this date
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ext - Extension of the file to read
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'''
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log.success('Searching files in {} '.format(path), 'BLTRParamReader')
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foldercounter = 0
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fileList0 = glob.glob1(path, "*%s" % ext)
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fileList0.sort()
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self.fileList = []
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self.dateFileList = []
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for thisFile in fileList0:
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year = thisFile[-14:-10]
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if not isNumber(year):
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continue
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month = thisFile[-10:-8]
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if not isNumber(month):
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continue
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day = thisFile[-8:-6]
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if not isNumber(day):
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continue
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year, month, day = int(year), int(month), int(day)
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dateFile = datetime.date(year, month, day)
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if (startDate > dateFile) or (endDate < dateFile):
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continue
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self.fileList.append(thisFile)
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self.dateFileList.append(dateFile)
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return
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def setNextFile(self):
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file_id = self.fileIndex
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if file_id == len(self.fileList):
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log.success('No more files in the folder', 'BLTRParamReader')
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self.flagNoMoreFiles = 1
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return 0
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log.success('Opening {}'.format(self.fileList[file_id]), 'BLTRParamReader')
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filename = os.path.join(self.path, self.fileList[file_id])
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dirname, name = os.path.split(filename)
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# 'peru2' ---> Piura - 'peru1' ---> Huancayo or Porcuya
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self.siteFile = name.split('.')[0]
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if self.filename is not None:
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self.fp.close()
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self.filename = filename
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self.fp = open(self.filename, 'rb')
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self.header_file = numpy.fromfile(self.fp, FILE_HEADER_STRUCTURE, 1)
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self.nrecords = self.header_file['nrec'][0]
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self.sizeOfFile = os.path.getsize(self.filename)
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self.counter_records = 0
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self.flagIsNewFile = 0
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self.fileIndex += 1
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return 1
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def readNextBlock(self):
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while True:
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if self.counter_records == self.nrecords:
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self.flagIsNewFile = 1
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if not self.setNextFile():
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return 0
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self.readBlock()
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if (self.datatime < datetime.datetime.combine(self.startDate, self.startTime)) or \
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(self.datatime > datetime.datetime.combine(self.endDate, self.endTime)):
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log.warning(
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'Reading Record No. {}/{} -> {} [Skipping]'.format(
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self.counter_records,
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self.nrecords,
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self.datatime.ctime()),
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'BLTRParamReader')
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continue
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break
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log.log('Reading Record No. {}/{} -> {}'.format(
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self.counter_records,
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self.nrecords,
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self.datatime.ctime()), 'BLTRParamReader')
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return 1
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def readBlock(self):
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pointer = self.fp.tell()
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header_rec = numpy.fromfile(self.fp, REC_HEADER_STRUCTURE, 1)
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self.nchannels = header_rec['nchan'][0] / 2
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self.kchan = header_rec['nrxs'][0]
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self.nmodes = header_rec['nmodes'][0]
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self.nranges = header_rec['nranges'][0]
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self.fp.seek(pointer)
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self.height = numpy.empty((self.nmodes, self.nranges))
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self.snr = numpy.empty((self.nmodes, self.nchannels, self.nranges))
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self.buffer = numpy.empty((self.nmodes, 3, self.nranges))
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self.flagDiscontinuousBlock = 0
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for mode in range(self.nmodes):
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self.readHeader()
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data = self.readData()
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self.height[mode] = (data[0] - self.correction) / 1000.
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self.buffer[mode] = data[1]
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self.snr[mode] = data[2]
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self.counter_records = self.counter_records + self.nmodes
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return
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def readHeader(self):
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'''
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RecordHeader of BLTR rawdata file
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'''
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header_structure = numpy.dtype(
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REC_HEADER_STRUCTURE.descr + [
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('antenna_coord', 'f4', (2, self.nchannels)),
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('rx_gains', 'u4', (self.nchannels,)),
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('rx_analysis', 'u4', (self.nchannels,))
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]
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)
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self.header_rec = numpy.fromfile(self.fp, header_structure, 1)
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self.lat = self.header_rec['lat'][0]
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self.lon = self.header_rec['lon'][0]
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self.delta = self.header_rec['delta_r'][0]
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self.correction = self.header_rec['dmode_rngcorr'][0]
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self.imode = self.header_rec['dmode_index'][0]
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self.antenna = self.header_rec['antenna_coord']
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self.rx_gains = self.header_rec['rx_gains']
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self.time = self.header_rec['time'][0]
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dt = datetime.datetime.utcfromtimestamp(self.time)
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if dt.date()>self.datatime.date():
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self.flagDiscontinuousBlock = 1
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self.datatime = dt
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def readData(self):
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'''
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Reading and filtering data block record of BLTR rawdata file, filtering is according to status_value.
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Input:
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status_value - Array data is set to NAN for values that are not equal to status_value
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'''
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data_structure = numpy.dtype(
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DATA_STRUCTURE.descr + [
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('rx_saturation', 'u4', (self.nchannels,)),
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('chan_offset', 'u4', (2 * self.nchannels,)),
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('rx_amp', 'u4', (self.nchannels,)),
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('rx_snr', 'f4', (self.nchannels,)),
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('cross_snr', 'f4', (self.kchan,)),
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('sea_power_relative', 'f4', (self.kchan,))]
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)
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data = numpy.fromfile(self.fp, data_structure, self.nranges)
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height = data['range']
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winds = numpy.array(
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(data['zonal'], data['meridional'], data['vertical']))
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snr = data['rx_snr'].T
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winds[numpy.where(winds == -9999.)] = numpy.nan
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winds[:, numpy.where(data['status'] != self.status_value)] = numpy.nan
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snr[numpy.where(snr == -9999.)] = numpy.nan
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snr[:, numpy.where(data['status'] != self.status_value)] = numpy.nan
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snr = numpy.power(10, snr / 10)
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return height, winds, snr
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def set_output(self):
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'''
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Storing data from databuffer to dataOut object
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'''
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self.dataOut.data_SNR = self.snr
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self.dataOut.height = self.height
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self.dataOut.data = self.buffer
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self.dataOut.utctimeInit = self.time
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self.dataOut.utctime = self.dataOut.utctimeInit
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self.dataOut.useLocalTime = False
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self.dataOut.paramInterval = 157
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self.dataOut.timezone = self.timezone
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self.dataOut.site = self.siteFile
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self.dataOut.nrecords = self.nrecords / self.nmodes
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self.dataOut.sizeOfFile = self.sizeOfFile
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self.dataOut.lat = self.lat
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self.dataOut.lon = self.lon
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self.dataOut.channelList = range(self.nchannels)
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self.dataOut.kchan = self.kchan
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self.dataOut.delta = self.delta
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self.dataOut.correction = self.correction
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self.dataOut.nmodes = self.nmodes
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self.dataOut.imode = self.imode
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self.dataOut.antenna = self.antenna
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self.dataOut.rx_gains = self.rx_gains
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self.dataOut.flagNoData = False
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self.dataOut.flagDiscontinuousBlock = self.flagDiscontinuousBlock
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def getData(self):
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'''
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Storing data from databuffer to dataOut object
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'''
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if self.flagNoMoreFiles:
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self.dataOut.flagNoData = True
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log.success('No file left to process', 'BLTRParamReader')
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return 0
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if not self.readNextBlock():
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self.dataOut.flagNoData = True
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return 0
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self.set_output()
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return 1
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