interpolate_covrr.py
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	import numpy as np
	import pandas as pd
	import xarray as xr

	from pvlib.solarposition import get_solarposition
	import util

	import os
	import time
	import sys

	### USER INPUT
	FILEPATH = sys.argv[1] # file path (WITHOUT EXTENSION!)

	# Load uncertainty
	fp = '%s.nc' %FILEPATH
	phys_pot = xr.open_mfdataset(fp, chunks = {'x':200, 'y':200})

	# Step 1: change timestamp
	phys_pot_corrected = phys_pot.copy()
	phys_pot_corrected.coords['timestamp'] = phys_pot_corrected.timestamp + pd.Timedelta(0.5, unit = 'h')

	# Step 2: interpolate corrected data to old timestamps
	phys_pot_interp = phys_pot_corrected.interp(timestamp = phys_pot.timestamp)

	# Step 3: save results
	fp = '%s_interp.nc' %FILEPATH
	print('Interpolated results; now saving to file %s' %fp)
	phys_pot_interp.to_netcdf(fp)