initial commit

modules/aeolus/datasource.py

+import datetime, os
+from datetime import timezone
+import glob
+import numpy as np
+
+from aeolus.geos_nav import GEOSNavigation
+from util.util import GenericException
+
+
+class AMVFiles:
+
+    def __init__(self, files_path, file_time_span, pattern, band='14', elem_name=None, line_name=None, lat_name=None,
+                 lon_name=None, params=None, out_params=None, meta_dict=None):
+
+        self.flist = glob.glob(files_path + pattern)
+        if len(self.flist) == 0:
+            raise GenericException('no matching files found in: ' + files_path)
+
+        self.band = band
+        self.ftimes = []
+        self.span_seconds = datetime.timedelta(minutes=file_time_span).seconds
+
+        for pname in self.flist:
+            dto = self.get_datetime(pname)
+            dto_start = dto
+            dto_end = dto + datetime.timedelta(minutes=file_time_span)
+            self.ftimes.append((dto_start.timestamp(), dto_end.timestamp()))
+
+        self.ftimes = np.array(self.ftimes)
+        self.flist = np.array(self.flist)
+        sidxs = np.argsort(self.ftimes[:, 0])
+        self.ftimes = self.ftimes[sidxs, :]
+        self.flist = self.flist[sidxs]
+
+        self.elem_name = elem_name
+        self.line_name = line_name
+        self.lon_name = lon_name
+        self.lat_name = lat_name
+        self.params = params
+        self.out_params = params
+        if out_params is not None:
+            self.out_params = out_params
+        self.meta_dict = meta_dict
+
+    def get_datetime(self, pathname):
+        pass
+
+    def get_navigation(self):
+        pass
+
+    def get_file_containing_time(self, timestamp):
+        k = -1
+        for i in range(len(self.ftimes.shape[0])):
+            if (timestamp >= self.ftimes[i, 0]) and (timestamp < self.ftimes[i, 1]):
+                k = i
+                break
+        if k < 0:
+            return None, None, None
+
+        return self.flist[k], self.ftimes[k, 0], k
+
+    def get_file(self, timestamp):
+        diff = self.ftimes[:, 0] - timestamp
+        midx = np.argmin(np.abs(diff))
+        if np.abs(self.ftimes[midx, 0] - timestamp) < self.span_seconds:
+            return self.flist[midx], self.ftimes[midx, 0], midx
+        else:
+            return None, None, None
+
+    def get_parameters(self):
+        return self.params
+
+    def get_out_parameters(self):
+        return self.out_params
+
+    def get_meta_dict(self):
+        return self.meta_dict
+
+
+class Framework(AMVFiles):
+    def __init__(self, files_path, file_time_span, band='14'):
+        elem_name = 'Element'
+        line_name = 'Line'
+        lon_name = 'Longitude'
+        lat_name = 'Latitude'
+        params = ['MedianPress', 'Wind_Speed', 'Wind_Dir', 'BestFitPresLvl']
+        out_params = ['Lon', 'Lat', 'Element', 'Line', 'pressure', 'wind_speed', 'wind_direction', 'BestFitPresLvl']
+        meta_dict = {'Lon': ('degrees east', 'f4'), 'Lat': ('degrees north', 'f4'), 'Element': (None, 'i4'),
+                     'Line': (None, 'i4'), 'pressure': ('hPa', 'f4'), 'wind_speed': ('m s-1', 'f4'),
+                     'wind_direction': ('degrees', 'f4'), 'BestFitPresLvl': ('hPa', 'f4')}
+
+        super().__init__(files_path, file_time_span, '*WINDS_AMV_EN-'+band+'*.nc', band=band, elem_name=elem_name, params=params,
+                         line_name=line_name, lat_name=lat_name, lon_name=lon_name, out_params=out_params, meta_dict=meta_dict)
+
+    def get_navigation(self):
+        return GEOSNavigation(sub_lon=-75.0)
+
+    def get_datetime(self, pathname):
+        fname = os.path.split(pathname)[1]
+        toks = fname.split('_')
+        dstr = toks[4]
+        tstr = toks[5]
+        dtstr = dstr + tstr
+        dto = datetime.datetime.strptime(dtstr, '%Y%j%H%M').replace(tzinfo=timezone.utc)
+
+        return dto
+
+
+class FrameworkCloudHeight(AMVFiles):
+    def __init__(self, files_path, file_time_span):
+        elem_name = 'Element'
+        line_name = 'Line'
+        lon_name = 'Longitude'
+        lat_name = 'Latitude'
+
+        out_params = ['CldTopPres', 'CldTopHght', 'CldOptDpth']
+        params = ['CldTopPres', 'CldTopHght', 'CldOptDpth']
+        meta_dict = {'CldTopPres': ('hPa', 'f4'), 'CldTopHght': ('km', 'f4'), 'CldOptDpth': ('km', 'f4')}
+
+        super().__init__(files_path, file_time_span, '*_CLOUD_HEIGHT_EN'+'*.nc', band=None, elem_name=elem_name, params=params,
+                         line_name=line_name, lat_name=lat_name, lon_name=lon_name, out_params=out_params, meta_dict=meta_dict)
+
+    def get_navigation(self):
+        return GEOSNavigation(sub_lon=-75.0)
+
+    def get_datetime(self, pathname):
+        fname = os.path.split(pathname)[1]
+        toks = fname.split('_')
+        dstr = toks[4]
+        tstr = toks[5]
+        dtstr = dstr + tstr
+        dto = datetime.datetime.strptime(dtstr, '%Y%j%H%M').replace(tzinfo=timezone.utc)
+
+        return dto
+
+
+class OPS(AMVFiles):
+    def __init__(self, files_path, file_time_span, band='14'):
+        elem_name = None
+        line_name = None
+        lon_name = 'lon'
+        lat_name = 'lat'
+
+        out_params = ['Lon', 'Lat', 'Element', 'Line', 'pressure', 'wind_speed', 'wind_direction']
+        params = ['pressure', 'wind_speed', 'wind_direction']
+        meta_dict = {'Lon': ('degrees east', 'f4'), 'Lat': ('degrees north', 'f4'), 'Element': (None, 'i4'), 'Line': (None, 'i4'),
+                          'pressure': ('hPa', 'f4'), 'wind_speed': ('m s-1', 'f4'), 'wind_direction': ('degrees', 'f4')}
+
+        super().__init__(files_path, file_time_span, 'OR_ABI-L2-DMWF*'+'C'+band+'*.nc', band=band, elem_name=elem_name, params=params,
+                         line_name=line_name, lat_name=lat_name, lon_name=lon_name, out_params=out_params, meta_dict=meta_dict)
+
+    def get_navigation(self):
+        # return GEOSNavigation(sub_lon=-75.2) ?
+        return GEOSNavigation(sub_lon=-75.0)
+
+    def get_datetime(self, pathname):
+        fname = os.path.split(pathname)[1]
+        toks = fname.split('_')
+        dtstr = toks[3]
+        dtstr = dtstr[:-3]
+        dto = datetime.datetime.strptime(dtstr, 's%Y%j%H%M').replace(tzinfo=timezone.utc)
+
+        return dto
+
+
+class CarrStereo(AMVFiles):
+    def __init__(self, files_path, file_time_span, band='14'):
+        elem_name = 'Element'
+        line_name = 'Line'
+        lon_name = 'Lon'
+        lat_name = 'Lat'
+
+        out_params = ['Lon', 'Lat', 'Element', 'Line', 'V_3D_u', 'V_3D_v', 'H_3D', 'pres', 'Fcst_Spd', 'Fcst_Dir', 'SatZen',
+                           'InversionFlag', 'CloudPhase', 'CloudType']
+
+        params = ['V_3D', 'H_3D', 'pres', 'Fcst_Spd', 'Fcst_Dir', 'SatZen',
+                       'InversionFlag', 'CloudPhase', 'CloudType']
+
+        meta_dict = {'H_3D': ('m', 'f4'), 'pres': ('hPa', 'f4'), 'Fcst_Spd': ('m s-1', 'f4'),
+                          'Fcst_Dir': ('degree', 'f4'),
+                          'SatZen': ('degree', 'f4'), 'InversionFlag': (None, 'u1'),
+                          'CloudPhase': (None, 'u1'), 'CloudType': (None, 'u1'),
+                          'V_3D_u': ('m s-1', 'f4'), 'V_3D_v': ('m s-1', 'f4'), 'Lon': ('degrees east', 'f4'),
+                          'Lat': ('degrees north', 'f4'), 'Element': (None, 'i4'), 'Line': (None, 'i4')}
+
+        super().__init__(files_path, file_time_span, 'tdw_qc_GOES*'+'ch_'+band+'.nc', band=band, elem_name=elem_name, params=params,
+                         line_name=line_name, lat_name=lat_name, lon_name=lon_name, out_params=out_params, meta_dict=meta_dict)
+
+    def get_navigation(self):
+        return GEOSNavigation(sub_lon=-137.0)
+
+    def get_datetime(self, pathname):
+        fname = os.path.split(pathname)[1]
+        toks = fname.split('_')
+        dtstr = toks[3]
+        dto = datetime.datetime.strptime(dtstr, '%Y%j.%H%M.ch').replace(tzinfo=timezone.utc)
+
+        return dto
+
+
+def get_datasource(files_path, file_time_span, source, band='14'):
+    if source == 'OPS':
+        return OPS(files_path, file_time_span, band=band)
+    elif source == 'FMWK':
+        return Framework(files_path, file_time_span, band=band)
+    elif source == 'CARR':
+        return CarrStereo(files_path, file_time_span, band=band)
+    elif source == 'FMWK_CLD_HGT':
+        return FrameworkCloudHeight(files_path, file_time_span, band=None)
+    else:
+        raise GenericException('Unknown data source type')
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