diff --git a/csst_mci_sim/straylight.py b/csst_mci_sim/straylight.py deleted file mode 100644 index c2e34531b925d12669e205ce0a8657479a8f34a4..0000000000000000000000000000000000000000 --- a/csst_mci_sim/straylight.py +++ /dev/null @@ -1,216 +0,0 @@ - -import numpy as np -import julian -from datetime import datetime -from astropy.time import Time -from astropy.coordinates import get_sun -from astropy.coordinates import SkyCoord -import astropy.coordinates as coord -import pandas as pd -from astropy import units as u - -from scipy.interpolate import interp1d - -from scipy import interpolate - -import ctypes - - -def transRaDec2D(ra, dec): - # radec转为竞天程序里的ob, 赤道坐标系下的笛卡尔三维坐标xyz. - x1 = np.cos(dec / 57.2957795) * np.cos(ra / 57.2957795) - y1 = np.cos(dec / 57.2957795) * np.sin(ra / 57.2957795) - z1 = np.sin(dec / 57.2957795) - return np.array([x1, y1, z1]) - - -# def earth_angle(time_jd, x_sat, y_sat, z_sat, ra_obj, dec_obj): - -# ra_sat = np.arctan2(y_sat, x_sat) / np.pi * 180 -# dec_sat = np.arctan2(z_sat, np.sqrt(x_sat**2+y_sat**2)) / np.pi * 180 -# radec_sat = SkyCoord(ra=ra_sat*u.degree, -# dec=dec_sat*u.degree, frame='gcrs') -# lb_sat = radec_sat.transform_to('geocentrictrueecliptic') - -# # get the obj location -# radec_obj = SkyCoord(ra=ra_obj*u.degree, -# dec=dec_obj*u.degree, frame='gcrs') -# lb_obj = radec_obj.transform_to('geocentrictrueecliptic') - -# # calculate the angle between sub-satellite point and the earth side -# earth_radius = 6371 # km -# sat_height = np.sqrt(x_sat**2 + y_sat**2 + z_sat**2) -# angle_a = np.arcsin(earth_radius/sat_height) / np.pi * 180 - -# # calculate the angle between satellite position and the target position -# angle_b = lb_sat.separation(lb_obj) - -# # calculat the earth angle -# angle = 180 - angle_a - angle_b.degree - -# return angle - -############################################################################### - - -def ill2flux(E, path): - - # use template from sky_bkg (background_spec_hst.dat) - filename = path+'MCI_inputData/refs/background_spec_hst.dat' - cat_spec = pd.read_csv(filename, sep='\s+', header=None, comment='#') - wave0 = cat_spec[0].values # A - spec0 = cat_spec[2].values # erg/s/cm^2/A/arcsec^2 - - # convert erg/s/cm^2/A/arcsec^2 to erg/s/cm^2/A/sr - flux1 = spec0 / (1/4.25452e10) - # convert erg/s/cm^2/A/sr to W/m^2/sr/um - flux2 = flux1 * 10 - - # 对接收面积积分，输出单位 W/m^2/nm - D = 2 # meter - f = 28 # meter, 焦距，转换关系来源于王维notes. - flux3 = flux2 * np.pi * D**2 / 4 / f**2 / 10**3 - - f = interp1d(wave0, flux3) - wave_range = np.arange(3800, 7800) - flux3_mean = f(wave_range) - delta_lamba = 0.1 # nm - E0 = np.sum(flux3_mean * delta_lamba) - - factor = E / E0 - spec_scaled = factor * spec0 - - return wave0, spec_scaled - -############################################################## - - -def stray_light(path, time_jd, x_sat, y_sat, z_sat, ra, dec): - # EarthShine from straylight - sl = StrayLight(path, jtime=time_jd, sat=np.array( - [x_sat, y_sat, z_sat]), radec=np.array([(ra*u.degree).value, (dec*u.degree).value])) - - star_e = sl.caculateStarLightFilter(filter='r') - - # angle_earth = earth_angle(time_jd, x_sat, y_sat, z_sat, ra, dec) - - # if angle_earth < 0: - # earth_e = 0 - - earthshine_wave0, earthshine_flux0 = ill2flux(star_e, path) - - # sample as mci wavelength - wave_mci = np.linspace(2500, 11000, 8501) # np.arange(2500, 11000, 1) - - f2 = interp1d(earthshine_wave0, earthshine_flux0) - star_stray = f2(wave_mci) - - return star_stray -################################################################# - - -class StrayLight(object): - - def __init__(self, path, jtime=2460843., sat=np.array([0, 0, 0]), radec=np.array([0, 0])): - - self.path = path - self.jtime = jtime - self.sat = sat - self.equator = coord.SkyCoord( - radec[0]*u.degree, radec[1]*u.degree, frame='icrs') - self.ecliptic = self.equator.transform_to('barycentrictrueecliptic') - self.pointing = transRaDec2D(radec[0], radec[1]) - self.slcdll = ctypes.CDLL( - self.path+'MCI_inputData/refs/libstraylight.so') # dylib - - self.slcdll.Calculate.argtypes = [ctypes.c_double, ctypes.POINTER(ctypes.c_double), - ctypes.POINTER(ctypes.c_double), ctypes.POINTER( - ctypes.c_double), - ctypes.POINTER(ctypes.c_double), ctypes.c_char_p] - - self.slcdll.PointSource.argtypes = [ctypes.c_double, ctypes.POINTER(ctypes.c_double), - ctypes.POINTER(ctypes.c_double), ctypes.POINTER( - ctypes.c_double), - ctypes.POINTER(ctypes.c_double), ctypes.c_char_p] - - self.slcdll.EarthShine.argtypes = [ctypes.c_double, ctypes.POINTER(ctypes.c_double), - ctypes.POINTER(ctypes.c_double), ctypes.POINTER( - ctypes.c_double), - ctypes.POINTER(ctypes.c_double)] - - self.slcdll.Zodiacal.argtypes = [ctypes.c_double, ctypes.POINTER(ctypes.c_double), - ctypes.POINTER(ctypes.c_double)] - self.slcdll.ComposeY.argtypes = [ctypes.POINTER(ctypes.c_double), ctypes.POINTER(ctypes.c_double), - ctypes.POINTER(ctypes.c_double)] - self.slcdll.Init.argtypes = [ - ctypes.c_char_p, ctypes.c_char_p, ctypes.c_char_p, ctypes.c_char_p] - self.deFn = self.path+"MCI_inputData/refs/DE405" - self.PSTFn = self.path+"MCI_inputData/refs/PST" - self.RFn = self.path+"MCI_inputData/refs/R" - self.ZolFn = self.path+"MCI_inputData/refs/Zodiacal" - self.brightStarTabFn = self.path+"MCI_inputData/refs/BrightGaia_with_csst_mag" - - self.slcdll.Init(str.encode(self.deFn), str.encode( - self.PSTFn), str.encode(self.RFn), str.encode(self.ZolFn)) - - def caculateStarLightFilter(self, filter='i'): - filterIndex = {'nuv': 0, 'u': 1, 'g': 2, - 'r': 3, 'i': 4, 'z': 5, 'y': 6} - - sat = (ctypes.c_double*3)() - sat[:] = self.sat - ob = (ctypes.c_double*3)() - ob[:] = self.pointing - - py1 = (ctypes.c_double*3)() - py2 = (ctypes.c_double*3)() - self.slcdll.ComposeY(ob, py1, py2) - - star_e1 = (ctypes.c_double*7)() - self.slcdll.PointSource(self.jtime, sat, ob, py1, - star_e1, str.encode(self.brightStarTabFn)) - star_e2 = (ctypes.c_double*7)() - self.slcdll.PointSource(self.jtime, sat, ob, py2, - star_e2, str.encode(self.brightStarTabFn)) - - band_star_e1 = star_e1[:][filterIndex[filter]] - band_star_e2 = star_e2[:][filterIndex[filter]] - - return max(band_star_e1, band_star_e2) - - # def caculateEarthShineFilter(self, filter='i'): - - # filterIndex = {'nuv': 0, 'u': 1, 'g': 2, - # 'r': 3, 'i': 4, 'z': 5, 'y': 6} - # sat = (ctypes.c_double*3)() - # sat[:] = self.sat - # ob = (ctypes.c_double*3)() - # ob[:] = self.pointing - - # py1 = (ctypes.c_double*3)() - # py2 = (ctypes.c_double*3)() - # self.slcdll.ComposeY(ob, py1, py2) - - # earth_e1 = (ctypes.c_double*7)() - # self.slcdll.EarthShine(self.jtime, sat, ob, py1, - # earth_e1) # e[7]代表7个波段的照度 - - # earth_e2 = (ctypes.c_double*7)() - # self.slcdll.EarthShine(self.jtime, sat, ob, py2, earth_e2) - - # band_earth_e1 = earth_e1[:][filterIndex[filter]] - # band_earth_e2 = earth_e2[:][filterIndex[filter]] - - # return max(band_earth_e1, band_earth_e2) - - -############################################################################### -## test -# path='/home/yan/MCI/' -# time_jd = 2460417.59979167 -# x_sat = -4722.543136 -# y_sat = -1478.219213 -# z_sat = 4595.402769 -# ra = 116.18081536720157 -# dec= 39.42316681016602 -# earthshine0=stray_light(path,time_jd, x_sat, y_sat, z_sat, ra, dec)