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# 

# LSST Data Management System 

# Copyright 2012-2017 LSST Corporation. 

# 

# This product includes software developed by the 

# LSST Project (http://www.lsst.org/). 

# 

# This program is free software: you can redistribute it and/or modify 

# it under the terms of the GNU General Public License as published by 

# the Free Software Foundation, either version 3 of the License, or 

# (at your option) any later version. 

# 

# This program is distributed in the hope that it will be useful, 

# but WITHOUT ANY WARRANTY; without even the implied warranty of 

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 

# GNU General Public License for more details. 

# 

# You should have received a copy of the LSST License Statement and 

# the GNU General Public License along with this program. If not, 

# see <http://www.lsstcorp.org/LegalNotices/>. 

# 

 

from __future__ import print_function 

 

import unittest 

 

import numpy as np 

 

from numpy.testing import assert_almost_equal, assert_array_max_ulp 

 

import lsst.utils 

from lsst.validate.drp import util 

 

 

def test_empty_positionRms(): 

ra = np.deg2rad(np.array([])) 

dec = np.deg2rad(np.array([])) 

ra_avg = np.mean(ra) 

dec_avg = np.mean(dec) 

 

obs = util.positionRms(ra_avg, dec_avg, ra, dec) 

 

assert np.isnan(obs) 

 

 

def test_single_positionRms(): 

ra = np.deg2rad(np.array([10.0010])) 

dec = np.deg2rad(np.array([20.001])) 

ra_avg = np.mean(ra) 

dec_avg = np.mean(dec) 

 

exp = 0 

obs = util.positionRms(ra_avg, dec_avg, ra, dec) 

 

assert_array_max_ulp(obs, exp) 

 

 

def test_basic_positionRms(): 

ra = np.deg2rad(np.array([10.0010, 10.0005, 10.0000, 10.0005])) 

dec = np.deg2rad(np.array([20.001, 20.006, 20.002, 20.004])) 

ra_avg = np.mean(ra) 

dec_avg = np.mean(dec) 

 

exp = 0.0019488135998463505 * 3600 * 1000 # degrees * arcsec/degree * milliarcsec/arcsec 

obs = util.positionRms(ra_avg, dec_avg, ra, dec) 

 

assert_almost_equal(obs, exp, decimal=7) # 1e-7 rad == 5.73e-6 deg == 36 milliarcsec 

 

 

def test_north_pole_positionRms(): 

ra = np.deg2rad(np.array([10.0010, 10.0005, 190.0000, 190.0005])) 

dec = np.deg2rad(np.array([89.999, 89.998, 89.999, 89.998])) 

ra_avg = np.mean(ra) 

dec_avg = np.mean(dec) 

 

exp = 0.0021794464685958273 * 3600 * 1000 # degrees * arcsec/degree * milliarcsec/arcsec 

obs = util.positionRms(ra_avg, dec_avg, ra, dec) 

 

assert_almost_equal(obs, exp, decimal=7) # 1e-7 rad == 5.73e-6 deg == 36 milliarcsec 

 

 

def test_south_pole_positionRms(): 

ra = np.deg2rad(np.array([10.0010, 10.0005, 190.0000, 190.0005])) 

dec = -np.deg2rad(np.array([89.999, 89.998, 89.999, 89.998])) 

ra_avg = np.mean(ra) 

dec_avg = np.mean(dec) 

 

exp = 0.0021794464685958273 * 3600 * 1000 # degrees * arcsec/degree * milliarcsec/arcsec 

obs = util.positionRms(ra_avg, dec_avg, ra, dec) 

 

assert_almost_equal(obs, exp, decimal=7) # 1e-7 rad == 5.73e-6 deg == 36 milliarcsec 

 

 

def test_wrap_positionRms(): 

ra = np.deg2rad(np.array([10.0010, 10.0005, 370.0000, 370.0005])) 

dec = np.deg2rad(np.array([20.001, 20.006, 20.002, 20.004])) 

ra_avg = np.mean(ra % (2*np.pi)) 

dec_avg = np.mean(dec) 

 

exp = 0.0019488135998463505 * 3600 * 1000 # degrees * arcsec/degree * milliarcsec/arcsec 

obs = util.positionRms(ra_avg, dec_avg, ra, dec) 

 

assert_almost_equal(obs, exp, decimal=7) # 1e-7 rad == 5.73e-6 deg == 36 milliarcsec 

 

 

106 ↛ 107line 106 didn't jump to line 107, because the condition on line 106 was never trueif __name__ == "__main__": 

lsst.utils.tests.init() 

unittest.main()