def get_tstate(): tstate = tpm.TSTATE() tpm.tpm_data(tstate, tpm.TPM_INIT) tstate.utc = tpm.J2000 tstate.lon = tpm.d2r(-111.598333) tstate.lat = tpm.d2r(31.956389) tstate.alt = 2093.093 tstate.delta_at = tpm.delta_AT(tstate.utc) tstate.delta_ut = tpm.delta_UT(tstate.utc) tpm.tpm_data(tstate, tpm.TPM_ALL) return tstate
def test_slalib_hip_fk52appradec(self): """convert(x, s1=6, s2=11) + PM => SLALIB sla_map HIP.""" tab = get_sla("slalib_hip_map.txt") v6l = [] for r, d, pa, pd, px in zip(self.hip_tab['raj2'], self.hip_tab['decj2'], self.hip_tab['pma'], self.hip_tab['pmd'], self.hip_tab['px']): r = tpm.d2r(r) d = tpm.d2r(d) # Milli-arcsec / Jul. yr to arcsec per Jul. century. pma = pa / math.cos(d) / 1000.0 * 100.0 pmd = pd / 1000.0 * 100.0 px /= 1000.0 # mili-arcsec to arc-sec. v6 = tpm.cat2v6(r, d, pma, pmd, px, 0.0, tpm.CJ) v6l.append(v6) utc = tpm.gcal2j(2010, 1, 1) - 0.5 # midnight tt = tpm.utc2tdb(utc) v6o = convert.proper_motion(v6l, tt, tpm.J2000) v6o = convert.convertv6(v6o, s1=6, s2=11, epoch=tt, equinox=tpm.J2000, utc=utc, delta_at=tpm.delta_AT(utc)) cat = (tpm.v62cat(v, tpm.CJ) for v in v6o) l = len(v6o) for v, s, i in zip(cat, tab, range(l)): ra = math.degrees(tpm.r2r(v['alpha'])) dec = math.degrees(v['delta']) ra_diff = abs(ra - s[0]) * 3600.0 dec_diff = abs(dec - s[1]) * 3600.0 self.assertTrue(ra_diff <= 0.33) self.assertTrue(dec_diff <= 0.03)
def testDeltaAT(self): """delta_AT(utc): TAI - UTC for the given UTC.""" dat = [10.0, 10.0, 32.0, 22.0, 34.0] for i, j in zip(self.utc, dat): self.assertAlmostEqual(tpm.delta_AT(i), j)
cat20 = convert.v62cat(v620, tpm.CJ) cat20 = cat2array(cat20) ha = np.degrees(cat20['alpha']) dec = np.degrees(cat20['delta']) # Difference in HA and Dec, using TPM and SLALIB. ha_diff = np.abs(ha[indx] - ha_sla[indx]) * 3600.0 dec_diff = np.abs(dec[indx] - dec_sla[indx]) * 3600.0 # Find RA = LAST - HA. tstate = tpm.TSTATE() tpm.tpm_data(tstate, tpm.TPM_INIT) tstate.utc = utc tstate.delta_ut = tpm.delta_UT(utc) tstate.delta_at = tpm.delta_AT(utc) tstate.lon = tpm.d2r(-111.598333) tstate.lat = tpm.d2r(31.956389) tpm.tpm_data(tstate, tpm.TPM_ALL) last = tpm.r2d(tstate.last) ra = last - ha # Have to normalize to 0 - 360.0. ra = np.array([i if i > 0 else i + 360.0 for i in ra]) ra_diff = np.abs(ra[indx] - ra_sla[indx]) * 3600.0 print("Comparison with SLALIB aop using HIPPARCOS data.") fs = "{0} {1}\n" + \ "Min: {2:.4f} Max: {3:.4f} \nMean: {4:.4f} Std: {5:.4f}\n" x = stats.describe(az_diff) print(fs.format("az_diff", "arcsec", x[1][0], x[1][1], x[2], x[3]**0.5)) x = stats.describe(zd_diff)
cat20 = convert.v62cat(v620, tpm.CJ) cat20 = cat2array(cat20) ha = np.degrees(cat20['alpha']) dec = np.degrees(cat20['delta']) # Difference in HA and Dec, using TPM and SLALIB. ha_diff = np.abs(ha[indx] - ha_sla[indx]) * 3600.0 dec_diff = np.abs(dec[indx] - dec_sla[indx]) * 3600.0 # Find RA = LAST - HA. tstate = tpm.TSTATE() tpm.tpm_data(tstate, tpm.TPM_INIT) tstate.utc = utc tstate.delta_ut = tpm.delta_UT(utc) tstate.delta_at = tpm.delta_AT(utc) tstate.lon = tpm.d2r(-111.598333) tstate.lat = tpm.d2r(31.956389) tpm.tpm_data(tstate, tpm.TPM_ALL) last = tpm.r2d(tstate.last) ra = last - ha # Have to normalize to 0 - 360.0. ra = np.array([i if i > 0 else i + 360.0 for i in ra]) ra_diff = np.abs(ra[indx] - ra_sla[indx]) * 3600.0 print("Comparison with SLALIB aop using HIPPARCOS data.") fs = "{0} {1}\n" + \ "Min: {2:.4f} Max: {3:.4f} \nMean: {4:.4f} Std: {5:.4f}\n" x = stats.describe(az_diff) print(fs.format("az_diff", "arcsec", x[1][0], x[1][1], x[2], x[3] ** 0.5)) x = stats.describe(zd_diff)
def testDeltaAT(self): """delta_AT(utc): TAI - UTC for the given UTC.""" dat = [10.0, 10.0, 32.0, 22.0, 34.0] for i,j in zip(self.utc, dat): self.assertAlmostEqual(tpm.delta_AT(i), j)
def test_slalib_hip_fk52obs(self): """convert(x, s1=6, s2=19) (+ s2=20) + PM => SLALIB sla_aop HIP.""" tab = get_sla("slalib_hip_aop.txt") az_sla = [] zd_sla = [] ha_sla = [] dec_sla = [] ra_sla = [] for i in tab: # Convert longitude values to 0 - 360 az_sla.append(i[0] if i[0] >= 0 else i[0] + 360.0) zd_sla.append(i[1]) ha_sla.append(i[2] if i[2] >= 0 else i[2] + 360.0) dec_sla.append(i[3]) ra_sla.append(i[4] if i[4] >= 0 else i[4] + 360.0) v6l = [] for r, d, pa, pd, px in zip(self.hip_tab['raj2'], self.hip_tab['decj2'], self.hip_tab['pma'], self.hip_tab['pmd'], self.hip_tab['px']): r = tpm.d2r(r) d = tpm.d2r(d) # Milli-arcsec / Jul. yr to arcsec per Jul. century. pma = pa / math.cos(d) / 1000.0 * 100.0 pmd = pd / 1000.0 * 100.0 px /= 1000.0 # mili-arcsec to arc-sec. v6 = tpm.cat2v6(r, d, pma, pmd, px, 0.0, tpm.CJ) v6l.append(v6) utc = tpm.gcal2j(2010, 1, 1) - 0.5 # midnight tt = tpm.utc2tdb(utc) # Convert to Az-EL. v6o = convert.proper_motion(v6l, tt, tpm.J2000) v6o = convert.convertv6(v6o, s1=6, s2=19, utc=utc) cat = (tpm.v62cat(v, tpm.CJ) for v in v6o) az = [] zd = [] for i in cat: az.append(tpm.r2d(i['alpha'])) zd.append(90.0 - tpm.r2d(i['delta'])) # Convert Az-El to HA-Dec. v6o = convert.convertv6(v6o, s1=19, s2=20, utc=utc) cat = (tpm.v62cat(v, tpm.CJ) for v in v6o) # Find LAST. tstate = tpm.TSTATE() tpm.tpm_data(tstate, tpm.TPM_INIT) tstate.utc = utc tstate.delta_ut = tpm.delta_UT(utc) tstate.delta_at = tpm.delta_AT(utc) tstate.lon = tpm.d2r(-111.598333) tstate.lat = tpm.d2r(31.956389) tpm.tpm_data(tstate, tpm.TPM_ALL) last = tpm.r2d(tstate.last) ha = [] dec = [] ra = [] for i in cat: ha.append(tpm.r2d(i['alpha'])) dec.append(tpm.r2d(i['delta'])) # RA = LAST - HA and convert to 0 - 360. x = last - tpm.r2d(i['alpha']) ra.append(x if x >= 0 else x + 360.0) for i in range(len(az)): # Test only the coordinates with ZD < 75.0. if zd[i] < 75.0: self.assertTrue(abs(az[i] - az_sla[i]) * 3600.0 <= 0.25) self.assertTrue(abs(zd[i] - zd_sla[i]) * 3600.0 <= 0.04) self.assertTrue(abs(ha[i] - ha_sla[i]) * 3600.0 <= 0.28) self.assertTrue(abs(dec[i] - dec_sla[i]) * 3600.0 <= 0.04) self.assertTrue(abs(ra[i] - ra_sla[i]) * 3600.0 <= 0.33)