""" RHEAS module for retrieving the TRMM rainfall data (3B42v7) stored
at the IRI Data Library.
.. module:: trmm
:synopsis: Retrieve TRMM rainfall data
.. moduleauthor:: Kostas Andreadis <kandread@jpl.nasa.gov>
"""
from datasets.decorators import netcdf
from datetime import timedelta
import datasets
table = "precip.trmm"
@netcdf
[docs]def fetch(dbname, dt, bbox):
"""Downloads TRMM 3B42v7 rainfall data from the IRI data server,
and imports them into the database *dbname*. Optionally uses a bounding box to
limit the region with [minlon, minlat, maxlon, maxlat]."""
url = "http://iridl.ldeo.columbia.edu/SOURCES/.NASA/.GES-DAAC/.TRMM_L3/.TRMM_3B42/.v7/.daily/.precipitation/dods"
varname = "precipitation"
return url, varname, bbox, dt
[docs]def download(dbname, dts, bbox=None):
res = 0.25
data, lat, lon, dts = fetch(dbname, dts, bbox)
for t, dt in enumerate([dts[0] + timedelta(tt) for tt in range((dts[-1] - dts[0]).days + 1)]):
datasets.ingest(dbname, table, data[t, :, :], lat, lon, res, dt)
[docs]def dates(dbname):
dts = datasets.dates(dbname, table)
return dts