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boundary.py
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boundary.py
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import os
import sys
import time
import numpy as np
import argparse
import itertools
import astropy.io.fits as fits
from cosmo import cosmo, volcom
from scipy.interpolate import interp1d
from astropy.table import Table, vstack
from cartesian import cartesian, rotate
from runtime import calc_runtime
from desi_randoms import desi_randoms
from findfile import fetch_fields, findfile, overwrite_check, call_signature
from gama_limits import gama_limits, gama_field
from scipy.spatial.transform import Rotation as R
from ros_tools import roscen, ros_limits
from config import Configuration
from ddp_zlimits import ddp_zlimits
np.random.seed(314)
def rotate2rosette(ros_ra, ros_dec, pos):
pos = np.array(pos, copy=True)
rot = R.from_rotvec(-np.radians(90. - ros_dec) * np.array([1, 0, 0]))
res = rot.apply(pos)
rot = R.from_rotvec(np.radians(ros_ra - 90.) * np.array([0, 0, 1]))
resres = rot.apply(res)
return resres
parser = argparse.ArgumentParser(description='Calculate a set of boundary points')
parser.add_argument('--log', help='Create a log file of stdout.', action='store_true')
parser.add_argument('-f', '--field', type=str, help='select GAMA field [G9, G12, G15] or DESI rosette [R1...]', required=True)
parser.add_argument('-d', '--dryrun', help='Dryrun.', action='store_true')
parser.add_argument('-s', '--survey', help='Survey, e.g. GAMA, DESI, etc.', type=str, default='gama')
parser.add_argument('--sampling', help='Sampling rate', default=90000, type=int)
parser.add_argument('--prefix', help='filename prefix', default='randoms')
parser.add_argument('--nooverwrite', help='Do not overwrite outputs if on disk', action='store_true')
parser.add_argument('--config', help='Path to configuration file', type=str, default=findfile('config'))
# Defaults to GAMA Gold limits.
parser.add_argument('--zmin', type=float, help='Minimum redshift limit', default=ddp_zlimits['DDP1'][0])
parser.add_argument('--zmax', type=float, help='Maximum redshift limit', default=ddp_zlimits['DDP1'][1])
args = parser.parse_args()
log = args.log
field = args.field.upper()
dryrun = args.dryrun
survey = args.survey.lower()
zmin = args.zmin
zmax = args.zmax
prefix = args.prefix
sampling = args.sampling
realz = 0
start = time.time()
fields = fetch_fields(survey)
assert field in fields, f'Provided {field} field is not compatible with those available for {survey} survey ({fields})'
opath = findfile(ftype='randoms', dryrun=dryrun, field=field, survey=survey, prefix=prefix, realz=realz)
if log:
logfile = findfile(ftype='boundary', dryrun=False, field=field, survey=survey, prefix=prefix, realz=realz, log=True)
print(f'Logging to {logfile}')
sys.stdout = open(logfile, 'w')
'''
config = Configuration(args.config)
config.update_attributes('boundary', args)
config.write()
'''
if args.nooverwrite:
overwrite_check(opath, ext='BOUNDARY')
if args.dryrun:
sampling = 1000
call_signature(dryrun, sys.argv)
## ras and decs.
if survey == 'gama':
area = 60.
ra_min = gama_limits[field]['ra_min']
ra_max = gama_limits[field]['ra_max']
dec_min = gama_limits[field]['dec_min']
dec_max = gama_limits[field]['dec_max']
pairs = {'RA': (ra_min, ra_max), 'DEC': (dec_min, dec_max), 'Z': (zmin, zmax)}
names = list(pairs.keys())
randoms = []
for key0 in names:
keys = list(pairs.keys())
keys.remove(key0)
key1 = keys[0]
key2 = keys[1]
print('Solving for {} boundary ({}, {})'.format(key0, key1, key2))
pair0 = pairs[key0]
pair1 = pairs[key1]
pair2 = pairs[key2]
continuous = np.linspace(pair1[0], pair1[1], sampling)
continuous = np.tile(continuous, 2)
np.random.shuffle(continuous)
continuous2 = np.linspace(pair2[0], pair2[1], sampling)
continuous2 = np.tile(continuous2, 2)
np.random.shuffle(continuous2)
discrete = pair0[0] * np.ones_like(continuous)
discrete[::2] = pair0[1]
np.random.shuffle(discrete)
to_add = Table(np.c_[discrete, continuous, continuous2], names=['BOUND_{}'.format(key0), 'BOUND_{}'.format(key1), 'BOUND_{}'.format(key2)])
to_add = to_add['BOUND_RA', 'BOUND_DEC', 'BOUND_Z']
randoms.append(to_add)
randoms = vstack(randoms)
randoms.rename_column('BOUND_Z', 'Z')
elif survey == 'desi':
# No requirement on NERSC HOST for boundary.
inner = 0.20 # deg.
outer = 1.75 # deg.
# TODO/HACK?
area = np.pi * (outer**2. - inner**2.)
ras = np.arange(0., 360., 1.e-3)
idecs = (90. - inner) * np.ones_like(ras)
odecs = (90. - outer) * np.ones_like(ras)
np.random.shuffle(ras)
randoms = np.c_[ras, idecs]
randoms = np.vstack((randoms, np.c_[ras, odecs]))
randoms = Table(randoms, names=['BOUND_RA', 'BOUND_DEC'])
randoms['Z'] = 0.2
chis = np.ones_like(randoms['Z'])
chis *= cosmo.comoving_distance(0.2).value # Mpc/h
xyz = cartesian(randoms['BOUND_RA'], randoms['BOUND_DEC'], randoms['Z'], rotate=False)
rr = int(field[1:])
rr = roscen[rr]
ros_xyz = rotate2rosette(rr[0], rr[1], xyz)
ras = np.degrees(np.arctan2(ros_xyz[:,1], ros_xyz[:,0]))
thetas = np.degrees(np.arccos(ros_xyz[:,2] / chis))
decs = 90. - thetas
to_wrap = ras < 0.0
ras[to_wrap] += 360.
randoms = Table(np.c_[ras, decs], names=['BOUND_RA', 'BOUND_DEC'])
randoms['Z'] = np.random.uniform(zmin, zmax, len(randoms))
else:
raise NotImplementedError(f'No implementation for survey: {survey}')
if dryrun:
nrand = 500
else:
nrand = len(randoms)
print('Solved {:d} for field {}'.format(nrand, field))
randoms.pprint()
randoms['V'] = volcom(randoms['Z'].data, area=area) - volcom(zmin, area=area)
randoms['BOUNDID'] = np.arange(len(randoms))
randoms['FIELD'] = field
randoms['GAMA_FIELD'] = gama_field(randoms['BOUND_RA'], randoms['BOUND_DEC'])
xyz = cartesian(randoms['BOUND_RA'], randoms['BOUND_DEC'], randoms['Z'])
randoms['CARTESIAN_X'] = xyz[:,0]
randoms['CARTESIAN_Y'] = xyz[:,1]
randoms['CARTESIAN_Z'] = xyz[:,2]
xyz = rotate(randoms['BOUND_RA'], randoms['BOUND_DEC'], xyz)
randoms['ROTCARTESIAN_X'] = xyz[:,0]
randoms['ROTCARTESIAN_Y'] = xyz[:,1]
randoms['ROTCARTESIAN_Z'] = xyz[:,2]
randoms.meta = {'ZMIN': zmin,\
'ZMAX': zmax,\
'NBOUND': nrand,\
'FIELD': field,\
'SAMPLING': sampling,\
'AREA': area}
print(randoms.meta)
randoms.meta['EXTNAME'] = 'BOUNDARY'
if os.path.isfile(opath):
runtime = calc_runtime(start, f'Appending BOUNDARY extension to {opath}', xx=randoms)
else:
raise RuntimeError(f'Failed to find {opath} needed to append.')
boundary = Table(randoms, copy=True)
# https://github.com/desihub/redrock/blob/7952a4d8e2692a4a4f07b85286c4346579e447ce/py/redrock/external/desi.py#L64
randoms = Table.read(opath)
randoms.meta['EXTNAME'] = 'RANDOMS'
header = fits.Header()
hx = fits.HDUList()
hx.append(fits.PrimaryHDU(header=header))
hx.append(fits.convenience.table_to_hdu(randoms))
hx.append(fits.convenience.table_to_hdu(boundary))
hx.writeto(opath, overwrite=True)
runtime = calc_runtime(start, 'Finished'.format(opath))
if log:
sys.stdout.close()