在Python中调整NVSS适合格式文件的大小，并在astropy中对此文件进行操作

import astropy.io.fits as fits
import numpy as np

nvss_file = fits.open('nvss.fits')
data = nvss_file[0].data
header = nvss_file[0].header
nvss_file.close()

new_data = np.resize(data, (new_size, new_size))

new_nvss_file = fits.PrimaryHDU(new_data, header)
new_nvss_hdulist = fits.HDUList([new_nvss_file])
new_nvss_hdulist.writeto('new_nvss.fits', overwrite=True)