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"""
generate image header
"""
import numpy as np
from astropy.io import fits
import astropy.wcs as pywcs
from collections import OrderedDict
from astropy.coordinates import SkyCoord
from astropy.wcs.utils import fit_wcs_from_points
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def chara2digit(char):
""" Function to judge and convert characters to digitals
Parameters
----------
"""
try:
float(char) # for int, long and float
except ValueError:
pass
return char
else:
data = float(char)
return data
def read_header_parameter(filename='global_header.param'):
""" Function to read the header parameters
Parameters
----------
"""
name = []
value = []
description = []
for line in open(filename):
line = line.strip("\n")
arr = line.split('|')
# csvReader = csv.reader(csvDataFile)
# for arr in csvReader:
name.append(arr[0])
# print(arr[0],arr[1])
value.append(chara2digit(arr[1]))
description.append(arr[2])
# print(value)
return name, value, description
def rotate_CD_matrix(cd, pa_aper):
"""Rotate CD matrix
Parameters
----------
cd: (2,2) array
CD matrix
pa_aper: float
Position angle, in degrees E from N, of y axis of the detector
Returns
-------
cd_rot: (2,2) array
Rotated CD matrix
Comments
--------
`astropy.wcs.WCS.rotateCD` doesn't work for non-square pixels in that it
doesn't preserve the pixel scale! The bug seems to come from the fact
that `rotateCD` assumes a transposed version of its own CD matrix.
"""
rad = np.deg2rad(-pa_aper)
mat = np.zeros((2,2))
mat[0,:] = np.array([np.cos(rad),-np.sin(rad)])
mat[1,:] = np.array([np.sin(rad),np.cos(rad)])
cd_rot = np.dot(mat, cd)
return cd_rot
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def calcaluteSLSRotSkyCoor(pix_xy = None,rot_angle = 1, xlen = 9216, ylen = 9232, w = None):
rad = np.deg2rad(rot_angle)
mat = np.zeros((2,2))
mat[0,:] = np.array([np.cos(rad),-np.sin(rad)])
mat[1,:] = np.array([np.sin(rad),np.cos(rad)])
center = np.array([xlen/2, ylen/2])
rot_pix = np.dot(mat, pix_xy-center) + center
skyCoor = w.wcs_pix2world(np.array([rot_pix]), 1)
return skyCoor
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# def Header_extention(xlen = 9216, ylen = 9232, gain = 1.0, readout = 5.0, dark = 0.02,saturation=90000, row_num = 1, col_num = 1):
#
# """ Creat an image frame for CCST with multiple extensions
#
# Parameters
# ----------
#
# """
#
# flag_ltm_x = [0,1,-1,1,-1]
# flag_ltm_y = [0,1,1,-1,-1]
# flag_ltv_x = [0,0,1,0,1]
# flag_ltv_y = [0,0,0,1,1]
#
# detector_size_x = int(xlen)
# detector_size_y = int(ylen)
#
# data_x = str(int(detector_size_x))
# data_y = str(int(detector_size_y))
#
# data_sec = '[1:'+data_x+',1:'+data_y+']'
# e_header_fn = os.path.split(os.path.realpath(__file__))[0] + '/extension_header.param'
# name, value, description = read_header_parameter(e_header_fn)
# f = open(os.path.split(os.path.realpath(__file__))[0] + '/filter.lst')
# s = f.readline()
# s = s.strip("\n")
# filters = s.split(' ')
# s = f.readline()
# s = s.strip("\n")
# filterID = s.split()
#
# s = f.readline()
# s = s.strip("\n")
# CCDID = s.split()
#
# k = (row_num-1)*6+col_num
#
# h_iter = 0
# for n1,v1,d1 in zip(name, value, description):
# if n1=='EXTNAME':
# value[h_iter] = 'RAW,'+CCDID[k-1].rjust(2,'0')
# if n1=='CCDNAME':
# value[h_iter] = 'ccd' + CCDID[k-1].rjust(2,'0')
# if n1=='AMPNAME':
# value[h_iter] = 'ccd' + CCDID[k-1].rjust(2,'0') + ':A'
# if n1=='GAIN':
# value[h_iter] = gain
# if n1=='RDNOISE':
# value[h_iter] = readout
# if n1=='SATURATE':
# value[h_iter] = saturation
# if n1=='CCDCHIP':
# value[h_iter] = 'ccd' + CCDID[k-1].rjust(2,'0')
# if n1=='CCDLABEL':
# value[h_iter] = filters[k-1] + '-' + filterID[k-1]
# if n1=='DATASEC':
# value[h_iter] = data_sec
#
# h_iter = h_iter + 1
#
#
# return name, value, description
def WCS_def(xlen = 9216, ylen = 9232, gapy = 898.0, gapx1 = 534, gapx2 = 1309, ra_ref = 60, dec_ref = -40, pa = -23.433, pixel_scale = 0.074, pixel_size=1e-2,
rotate_chip=0., filter = 'GI', row_num = None, col_num = None, xcen = None, ycen = None):
""" Creat a wcs frame for CCST with multiple extensions
Parameters
----------
"""
r_dat = OrderedDict()
r_dat['EQUINOX'] = 2000.0
r_dat['WCSDIM'] = 2.0
r_dat['CTYPE1'] = 'RA---TAN'
r_dat['CTYPE2'] = 'DEC--TAN'
r_dat['CRVAL1'] = ra_ref
r_dat['CRVAL2'] = dec_ref
flag_x = [0, 1, -1, 1, -1]
flag_y = [0, 1, 1, -1, -1]
flag_ext_x = [0,-1,1,-1,1]
flag_ext_y = [0,-1,-1,1,1]
pa_aper = pa
detector_size_x = xlen
detector_size_y = ylen
gap_y = gapy
gap_x = [gapx1,gapx2]
x_center = (detector_size_x*x_num+gap_x[0]*gap_x1_num+gap_x[1]*gap_x2_num)/2
gap_x_map = np.array([[0,0,0,0,0],[gap_x[0],gap_x[1],gap_x[1],gap_x[1],gap_x[1]],[gap_x[1],gap_x[0],gap_x[0],gap_x[0],gap_x[0]],[gap_x[0],gap_x[0],gap_x[0],gap_x[0],gap_x[0]],[gap_x[0],gap_x[0],gap_x[0],gap_x[0],gap_x[1]],[gap_x[1],gap_x[1],gap_x[1],gap_x[1],gap_x[0]]])
j = row_num
i = col_num
# ccdnum = str((j-1)*5+i)
x_ref, y_ref = detector_size_x*i + sum(gap_x_map[0:i,j-1]) - detector_size_x/2. , (detector_size_y+gap_y)*j-gap_y-detector_size_y/2
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for k in range(1,2):
cd = np.array([[ pixel_scale, 0], [0, pixel_scale]])/3600.*flag_x[k]
cd_rot = rotate_CD_matrix(cd, pa_aper)
# f = open("CCD"+ccdnum.rjust(2,'0')+"_extension"+str(k)+"_wcs.param","w")
r_dat['CRPIX1'] = flag_ext_x[k]*((x_ref+flag_ext_x[k]*detector_size_x/2)-x_center)
r_dat['CRPIX2'] = flag_ext_y[k]*((y_ref+flag_ext_y[k]*detector_size_y/2)-y_center)
r_dat['CD1_1'] = cd_rot[0,0]
r_dat['CD1_2'] = cd_rot[0,1]
r_dat['CD2_1'] = cd_rot[1,0]
r_dat['CD2_2'] = cd_rot[1,1]
if filter in ['GU', 'GV', 'GI']:
w = wcs.WCS(naxis=2)
w.wcs.crpix = [r_dat['CRPIX1'], r_dat['CRPIX2']]
w.wcs.cd = cd_rot
w.wcs.crval = [ra_ref, dec_ref]
w.wcs.ctype = [r_dat['CTYPE1'], r_dat['CTYPE2']]
# test_center_o = w.wcs_pix2world(np.array([[xlen / 2, ylen / 2]]), 1)
sls_rot = 1
if i > 2:
sls_rot = -sls_rot
sn_x = 30
sn_y = 30
x_pixs = np.zeros(sn_y * sn_x)
y_pixs = np.zeros(sn_y * sn_x)
xpixs_line = np.linspace(1, xlen, sn_x)
ypixs_line = np.linspace(1, ylen, sn_y)
sky_coors = []
for n1, y in enumerate(ypixs_line):
for n2, x in enumerate(xpixs_line):
i_pix = n1 * sn_x + n2
x_pixs[i_pix] = x
y_pixs[i_pix] = y
pix_coor = np.array([x, y])
sc1 = calcaluteSLSRotSkyCoor(pix_xy=pix_coor, rot_angle=sls_rot, xlen=xlen, ylen=ylen, w=w)
# print(sc1[0,0],sc1[0,1])
sky_coors.append((sc1[0, 0], sc1[0, 1]))
wcs_new = fit_wcs_from_points(xy=np.array([x_pixs, y_pixs]),
world_coords=SkyCoord(sky_coors, frame="icrs", unit="deg"), projection='TAN')
# print(wcs_new)
# test_center = wcs_new.wcs_pix2world(np.array([[xlen / 2, ylen / 2]]), 1)
#
# print(test_center - test_center_o)
r_dat['CD1_1'] = wcs_new.wcs.cd[0, 0]
r_dat['CD1_2'] = wcs_new.wcs.cd[0, 1]
r_dat['CD2_1'] = wcs_new.wcs.cd[1, 0]
r_dat['CD2_2'] = wcs_new.wcs.cd[1, 1]
r_dat['CRPIX1'] = wcs_new.wcs.crpix[0]
r_dat['CRPIX2'] = wcs_new.wcs.crpix[1]
r_dat['CRVAL1'] = wcs_new.wcs.crval[0]
r_dat['CRVAL2'] = wcs_new.wcs.crval[1]
elif (xcen is not None) and (ycen is not None):
xcen, ycen = xcen/pixel_size, ycen/pixel_size
x1, y1 = xcen - xlen/2., ycen - ylen/2.
r_dat['CRPIX1'] = -x1
r_dat['CRPIX2'] = -y1
# cd = np.array([[ pixel_scale, 0], [0, pixel_scale]])/3600.*flag_x[1]
cd = np.array([[ pixel_scale, 0], [0, -pixel_scale]])/3600.
cd_rot = rotate_CD_matrix(cd, pa_aper)
r_dat['CD1_1'] = cd_rot[0,0]
r_dat['CD1_2'] = cd_rot[0,1]
r_dat['CD2_1'] = cd_rot[1,0]
r_dat['CD2_2'] = cd_rot[1,1]
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w = wcs.WCS(naxis=2)
w.wcs.crpix = [r_dat['CRPIX1'], r_dat['CRPIX2']]
w.wcs.cd = cd_rot
w.wcs.crval = [ra_ref, dec_ref]
w.wcs.ctype = [r_dat['CTYPE1'], r_dat['CTYPE2']]
sn_x = 30
sn_y = 30
x_pixs = np.zeros(sn_y * sn_x)
y_pixs = np.zeros(sn_y * sn_x)
xpixs_line = np.linspace(1, xlen, sn_x)
ypixs_line = np.linspace(1, ylen, sn_y)
sky_coors = []
for n1, y in enumerate(ypixs_line):
for n2, x in enumerate(xpixs_line):
i_pix = n1 * sn_x + n2
x_pixs[i_pix] = x
y_pixs[i_pix] = y
pix_coor = np.array([x, y])
sc1 = calcaluteSLSRotSkyCoor(pix_xy=pix_coor, rot_angle=rotate_chip, xlen=xlen, ylen=ylen, w=w)
sky_coors.append((sc1[0, 0], sc1[0, 1]))
wcs_new = fit_wcs_from_points(xy=np.array([x_pixs, y_pixs]),
world_coords=SkyCoord(sky_coors, frame="icrs", unit="deg"),
projection='TAN')
r_dat['CD1_1'] = wcs_new.wcs.cd[0, 0]
r_dat['CD1_2'] = wcs_new.wcs.cd[0, 1]
r_dat['CD2_1'] = wcs_new.wcs.cd[1, 0]
r_dat['CD2_2'] = wcs_new.wcs.cd[1, 1]
r_dat['CRPIX1'] = wcs_new.wcs.crpix[0]
r_dat['CRPIX2'] = wcs_new.wcs.crpix[1]
r_dat['CRVAL1'] = wcs_new.wcs.crval[0]
r_dat['CRVAL2'] = wcs_new.wcs.crval[1]
else:
raise ValueError('In function WCS_def(): Either (row_num, col_num) or (xcen, ycen, pixel_size) should be given')
return r_dat
#TODO project_cycle is temporary， is not in header defined, delete in future
def generatePrimaryHeader(xlen = 9216, ylen = 9232, pointNum = '1', ra = 60, dec = -40, pixel_scale = 0.074, date='200930', time_obs='120000', im_type = 'MS', exptime=150., sat_pos = [0.,0.,0.], sat_vel = [0., 0., 0.], project_cycle=6, chip_name="01"):
# array_size1, array_size2, flux, sigma = int(argv[1]), int(argv[2]), 1000.0, 5.0
g_header_fn = os.path.split(os.path.realpath(__file__))[0] + '/global_header.header'
f = open(os.path.split(os.path.realpath(__file__))[0] + '/filter.lst')
s = f.readline()
s = s.strip("\n")
filters = s.split(' ')
s = f.readline()
s = s.strip("\n")
filterID = s.split()
s = f.readline()
s = s.strip("\n")
CCDID = s.split()
h_prim = fits.Header()
# h_prim['PIXSIZE1'] = xlen
# h_prim['PIXSIZE2'] = ylen
h_prim['DATE'] = '20'+date[0:2]+'-' + date[2:4]+'-'+date[4:6] + 'T' + time_obs[0:2]+':'+time_obs[2:4]+':'+time_obs[4:6]
# h_prim['TIME'] = time_obs[0:2]+':'+time_obs[2:4]+':'+time_obs[4:6]
h_prim['DATE-OBS'] = '20'+date[0:2]+'-' + date[2:4]+'-'+date[4:6] + 'T' + time_obs[0:2]+':'+time_obs[2:4]+':'+time_obs[4:6]
# h_prim['TIME-OBS'] = time_obs[0:2]+':'+time_obs[2:4]+':'+time_obs[4:6]
# h_prim['DETECTOR'] = 'CHIP'+CCDID[k-1].rjust(2,'0')
h_prim['OBJ_RA'] = ra
h_prim['OBJ_DEC'] = dec
obs_type = {'SCI': '01', 'BIAS': '03', 'DARK': '07', 'FLAT': '11', 'CRS': '98', 'CRD': '99'}
OBS_id = '1'+ obs_type[im_type] + str(int(project_cycle)) + pointNum.rjust(7,'0')
h_prim['OBJECT'] = str(int(project_cycle)) + pointNum.rjust(7,'0')
h_prim['OBSID'] = OBS_id
# h_prim['TELFOCUS'] = 'f/14'
h_prim['EXPTIME'] = exptime
# Define file types
file_type = {'SCI':'SCIE', 'BIAS':'BIAS', 'DARK':'DARK', 'FLAT':'FLAT', 'CRS':'cosmic_ray', 'CRD':'cosmic_ray','CALS':'CALS','CALF':'CALF'}
ra_hms = format(co.ra.hms.h, '02.0f') + format(co.ra.hms.m, '02.0f') + format(co.ra.hms.s, '02.0f')
dec_hms = format(co.dec.dms.d, '02.0f') + format(abs(co.dec.dms.m), '02.0f') + format(abs(co.dec.dms.s), '02.0f')
h_prim['TARGET'] = ra_hms + '+' + dec_hms
#
# h_prim['RA_NOM'] = ra_hms
# h_prim['DEC_NOM'] = dec_hms
h_prim['RA_PNT0'] = ra
h_prim['DEC_PNT0'] = dec
h_prim['RA_PNT1'] = ra
h_prim['DEC_PNT1'] = dec
# h_prim['PIXSCAL1'] = pixel_scale
# h_prim['PIXSCAL2'] = pixel_scale
ttt = h_prim['DATE']
tstart = Time(ttt)
h_prim['EXPSTART'] = round(tstart.mjd, 5)
# tend = Time(tstart.cxcsec + h_prim['EXPTIME'], format="cxcsec")
tend = Time(tstart.mjd + h_prim['EXPTIME']/86400., format="mjd")
file_start_time = '20' + date[0:6] + time_obs[0:6]
end_time_str = str(tend.datetime)
file_end_time = end_time_str[0:4] + end_time_str[5:7]+end_time_str[8:10] + end_time_str[11:13] + end_time_str[14:16] + end_time_str[17:19]
# h_prim['FILENAME'] = 'CSST_MSC_MS_' + im_type + '_' + file_start_time + '_' + file_end_time + '_' + OBS_id + '_' + CCDID[
# k - 1].rjust(2, '0') + '_L0_V01'
h_prim['FILENAME'] = 'CSST_MSC_MS_' + im_type + '_' + file_start_time + '_' + file_end_time + '_' + OBS_id + '_' + chip_name + '_L0_V01'
h_prim['POSI0_X'] = sat_pos[0]
h_prim['POSI0_Y'] = sat_pos[1]
h_prim['POSI0_Z'] = sat_pos[2]
h_prim['VELO0_X'] = sat_vel[0]
h_prim['VELO0_Y'] = sat_vel[1]
h_prim['VELO0_Z'] = sat_vel[2]
# h_prim['RA_PNT0'] = ra_hms
# h_prim['DEC_PNT0'] = dec_hms
# Get version of CSSTSim Package
from pkg_resources import get_distribution
# h_prim['SIM_VER'] = (get_distribution("CSSTSim").version, "Version of CSST MSC simulation software")
h_prim['FITSCREA'] = get_distribution("CSSTSim").version
def generateExtensionHeader(chip, xlen = 9216, ylen = 9232,ra = 60, dec = -40, pa = -23.433, gain = 1.0, readout = 5.0, dark = 0.02, saturation=90000, pixel_scale = 0.074, pixel_size=1e-2,
extName='SCI', row_num = None, col_num = None, xcen=None, ycen=None):
e_header_fn = os.path.split(os.path.realpath(__file__))[0] + '/extension_header.header'
f = open(os.path.split(os.path.realpath(__file__))[0] + '/filter.lst')
s = f.readline()
s = s.strip("\n")
filters = s.split(' ')
s = f.readline()
s = s.strip("\n")
filterID = s.split()
# h_ext['CCDCHIP'] = CCDID[k - 1].rjust(2, '0')
# h_ext['CCDLABEL'] = filters[k-1] + '-' + filterID[k-1]
# h_ext['FILTER'] = filters[k-1]
h_ext['CCDCHIP'] = chip.chip_name
h_ext['CCDLABEL'] = chip.filter_type + '-' + str(chip.chipID).rjust(2, '0')
h_ext['FILTER'] = chip.filter_type
h_ext['NAXIS1'] = xlen
h_ext['NAXIS2'] = ylen
h_ext['EXTNAME'] = extName
h_ext['GAIN1'] = gain
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h_ext['GAIN2'] = gain
h_ext['GAIN3'] = gain
h_ext['GAIN4'] = gain
h_ext['GAIN5'] = gain
h_ext['GAIN6'] = gain
h_ext['GAIN7'] = gain
h_ext['GAIN8'] = gain
h_ext['GAIN9'] = gain
h_ext['GAIN10'] = gain
h_ext['GAIN11'] = gain
h_ext['GAIN12'] = gain
h_ext['GAIN13'] = gain
h_ext['GAIN14'] = gain
h_ext['GAIN15'] = gain
h_ext['GAIN16'] = gain
h_ext['RDNOIS1'] = readout
h_ext['RDNOIS2'] = readout
h_ext['RDNOIS3'] = readout
h_ext['RDNOIS4'] = readout
h_ext['RDNOIS5'] = readout
h_ext['RDNOIS6'] = readout
h_ext['RDNOIS7'] = readout
h_ext['RDNOIS8'] = readout
h_ext['RDNOIS9'] = readout
h_ext['RDNOIS10'] = readout
h_ext['RDNOIS11'] = readout
h_ext['RDNOIS12'] = readout
h_ext['RDNOIS13'] = readout
h_ext['RDNOIS14'] = readout
h_ext['RDNOIS15'] = readout
h_ext['RDNOIS16'] = readout
h_ext['PIXSCAL1'] = pixel_scale
h_ext['PIXSCAL2'] = pixel_scale
# h_ext['POS_ANG'] = pa
header_wcs = WCS_def(xlen=xlen, ylen=ylen, gapy=898.0, gapx1=534, gapx2=1309, ra_ref=ra, dec_ref=dec, pa=pa, pixel_scale=pixel_scale, pixel_size=pixel_size,
rotate_chip=chip.rotate_angle, filter = h_ext['FILTER'], row_num=row_num, col_num=col_num, xcen = xcen, ycen = ycen)
h_ext['CRPIX1'] = header_wcs['CRPIX1']
h_ext['CRPIX2'] = header_wcs['CRPIX2']
h_ext['CRVAL1'] = header_wcs['CRVAL1']
h_ext['CRVAL2'] = header_wcs['CRVAL2']
h_ext['CD1_1'] = header_wcs['CD1_1']
h_ext['CD1_2'] = header_wcs['CD1_2']
h_ext['CD2_1'] = header_wcs['CD2_1']
h_ext['CD2_2'] = header_wcs['CD2_2']
h_ext['EQUINOX'] = header_wcs['EQUINOX']
h_ext['WCSDIM'] = header_wcs['WCSDIM']
h_ext['CTYPE1'] = header_wcs['CTYPE1']
h_ext['CTYPE2'] = header_wcs['CTYPE2']
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return h_ext
def main(argv):
xlen = int(argv[1])
ylen = int(argv[2])
pointingNum = argv[3]
ra = float(argv[4])
dec = float(argv[5])
pSize = float(argv[6])
ccd_row_num = int(argv[7])
ccd_col_num = int(argv[8])
pa_aper = float(argv[9])
gain = float(argv[10])
readout = float(argv[11])
dark = float(argv[12])
fw = float(argv[13])
h_prim = generatePrimaryHeader(xlen = xlen, ylen = ylen,ra = ra, dec = dec, psize = pSize, row_num = ccd_row_num, col_num = ccd_col_num, pointNum = pointingNum)
h_ext = generateExtensionHeader(xlen = xlen, ylen = ylen,ra = ra, dec = dec, pa = pa_aper, gain = gain, readout = readout, dark = dark, saturation=fw, psize = pSize, row_num = ccd_row_num, col_num = ccd_col_num)
hdu1 = fits.PrimaryHDU(header=h_prim)
hdu2 = fits.ImageHDU(np.zeros([ylen,xlen]),header = h_ext)
hdul = fits.HDUList([hdu1,hdu2])
hdul.writeto(h_prim['FILENAME']+'.fits',output_verify='ignore')
# if __name__ == "__main__":
# main(sys.argv)