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FindCrossEarthlimb.py
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FindCrossEarthlimb.py
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#!/usr/bin/env python
import sys
import numpy as np
import click
import datetime
from astropy.io import fits
from astropy.coordinates import SkyCoord # High-level coordinates
from astropy.coordinates import ICRS, Galactic, FK4, FK5 # Low-level frames
from astropy.coordinates import Angle, Latitude, Longitude # Angles
import astropy.units as u
from array import array
import math
from math import cos, sin, tan, acos, asin, atan, radians, degrees
from pMETandMJD import *
import commands
def get_good_intervals(pathFileScAll, ra, dec, tsegments, zcut, thcut=65., torigin=0):
"""Look over spacecraft files and returns start-time list and stop-time list of good intervals.
"""
print pathFileScAll
coordsTgt = SkyCoord(ra, dec, unit="deg")
print coordsTgt
cmd = "ls {0}".format(pathFileScAll)
ret = commands.getoutput(cmd)
aPathFileScAll = ret.split("\n")
aFileToI = []
for iFileSc in range(len(aPathFileScAll)):
strPathFileSc = aPathFileScAll[iFileSc]
aFileToI.append(aPathFileScAll[iFileSc])
for tStart, tStop in zip(tsegments[0], tsegments[1]):
metStart = tStart + torigin
metStop = tStop + torigin
validtimes = []
for fileToI in aFileToI:
timeStart = datetime.datetime.now() # For progress bar
hdulistSC = fits.open(fileToI)
tbdataSC = hdulistSC[1].data
aSTART, aSTOP = tbdataSC.field('START'), tbdataSC.field('STOP')
aRA_ZENITH = tbdataSC.field('RA_ZENITH')
aDEC_ZENITH = tbdataSC.field('DEC_ZENITH')
aRA_SCZ, aRA_SCX = tbdataSC.field('RA_SCZ'), tbdataSC.field('RA_SCX')
aDEC_SCZ, aDEC_SCX = tbdataSC.field('DEC_SCZ'), tbdataSC.field('DEC_SCX')
aLIVETIME = tbdataSC.field('LIVETIME')
aDATA_QUAL = tbdataSC.field('DATA_QUAL')
aLAT_CONFIG = tbdataSC.field('LAT_CONFIG')
nTI = len(aSTART)
print " ", fileToI, "(", nTI, "intervals )"
gstarts = []
gstops = []
glivetimes = []
stop_prev = 0
iTIR = 0
for iTI in range(nTI):
if aSTART[iTI]<stop_prev:
print 'Odd order!!!'
return 1
if not aDATA_QUAL[iTI]>0:
print 'Bad time interval', aSTART[iTI], '-', aSTOP[iTI], ':', aDATA_QUAL[iTI]
continue
if not aLAT_CONFIG[iTI]==1:
print 'LAT config:', aSTART[iTI], '-', aSTOP[iTI], ':', aLAT_CONFIG[iTI]
continue
if aSTOP[iTI]<metStart or aSTART[iTI]>metStop:
continue
else:
coordsSCZ = SkyCoord(aRA_SCZ[iTI], aDEC_SCZ[iTI], unit="deg")
coordsZenith = SkyCoord(aRA_ZENITH[iTI], aDEC_ZENITH[iTI], unit="deg")
angSCZ = coordsSCZ.separation(coordsTgt)
degSCZ = float(angSCZ.to_string(unit=u.deg, decimal=True))
angZenith = coordsZenith.separation(coordsTgt)
degZenith = float(angZenith.to_string(unit=u.deg, decimal=True))
if degZenith<zcut and degSCZ<thcut:
if aSTART[iTI]>=metStart and aSTOP[iTI]<=metStop:
tstart_rel = aSTART[iTI]-torigin
tstop_rel = aSTOP[iTI]-torigin
tti = aLIVETIME[iTI]
elif aSTART[iTI]<=metStart and aSTOP[iTI]>=metStop:
tstart_rel = metStart-torigin
tstop_rel = metStop-torigin
tti = metStop-metStart
elif aSTART[iTI]<metStart:
tstart_rel = metStart-torigin
tstop_rel = aSTOP[iTI]-torigin
tti = (tstop_rel-tstart_rel)/(aSTOP[iTI]-aSTART[iTI])*aLIVETIME[iTI]
elif aSTOP[iTI]>metStop:
tstart_rel = aSTART[iTI]-torigin
tstop_rel = metStop-torigin
tti = (tstop_rel-tstart_rel)/(aSTOP[iTI]-aSTART[iTI])*aLIVETIME[iTI]
if len(gstops)==0:
gstarts.append(tstart_rel)
gstops.append(tstop_rel)
glivetimes.append(tti)
else:
if tstart_rel==gstops[-1]:
gstops[-1] = tstop_rel
glivetimes[-1] += tti
else:
gstarts.append(tstart_rel)
gstops.append(tstop_rel)
glivetimes.append(tti)
if iTI%300==0:
print iTI, 'Time:', aSTART[iTI]-torigin, 'RA:', aRA_SCZ[iTI], 'DEC:', aDEC_SCZ[iTI], 'Zenith:', degZenith, 'Inclination:', degSCZ, 'LAT_MODE:', tbdataSC.field('LAT_MODE')[iTI]
sys.stdout.flush()
if not len(gstarts)==len(gstops):
print 'Numbers of START and STOP are NOT same!!!'
sys.exit(1)
if not len(gstarts)==len(glivetimes):
print 'Numbers of START and LIVETIME are NOT same!!!'
sys.exit(1)
validtimes.append[(gstarts, gstops, glivetimes)]
return validtimes
def find_cross_earthlimb(pathFileScAll, ra, dec, tStart, tStop, zcut, thcut=65., torigin=0):
"""Look over spacecraft files and find times the target object crosses the Earthlimb.
"""
print pathFileScAll
coordsTgt = SkyCoord(ra, dec, unit="deg")
print coordsTgt
metStart = tStart + torigin
metStop = tStop + torigin
fmwStart = ConvertMetToFMW(metStart)
fmwStop = ConvertMetToFMW(metStop)
validtimes = []
print "Fermi Mission Week:", fmwStart, "-", fmwStop
cmd = "ls {0}".format(pathFileScAll)
ret = commands.getoutput(cmd)
aPathFileScAll = ret.split("\n")
aFileToI = []
for iFileSc in range(len(aPathFileScAll)):
strPathFileSc = aPathFileScAll[iFileSc]
aFileToI.append(aPathFileScAll[iFileSc])
timeStart = datetime.datetime.now() # For progress bar
for fileToI in aFileToI:
hdulistSC = fits.open(fileToI)
tbdataSC = hdulistSC[1].data
#tbdataSC.sort('START')
aSTART, aSTOP = tbdataSC.field('START'), tbdataSC.field('STOP')
aRA_ZENITH = tbdataSC.field('RA_ZENITH')
aDEC_ZENITH = tbdataSC.field('DEC_ZENITH')
aRA_SCZ = tbdataSC.field('RA_SCZ')
aRA_SCX = tbdataSC.field('RA_SCX')
aDEC_SCZ = tbdataSC.field('DEC_SCZ')
aDEC_SCX = tbdataSC.field('DEC_SCX')
aLIVETIME = tbdataSC.field('LIVETIME')
aDATA_QUAL = tbdataSC.field('DATA_QUAL')
aLAT_CONFIG = tbdataSC.field('LAT_CONFIG')
degZenith_prev = 0
degSCZ_prev = 0
start_prev = 0
stop_prev = 0
nTI = len(aSTART)
print " ", fileToI, "(", nTI, "intervals )"
iTIR = 0
for iTI in range(nTI):
if aSTART[iTI]<stop_prev:
print 'Odd order!!!'
return 1
if not aDATA_QUAL[iTI]>0:
print 'Bad time interval', aSTART[iTI], '-', aSTOP[iTI], ':', aDATA_QUAL[iTI]
continue
if not aLAT_CONFIG[iTI]==1:
print 'LAT config:', aSTART[iTI], '-', aSTOP[iTI], ':', aLAT_CONFIG[iTI]
continue
if aSTOP[iTI]>=metStart and aSTART[iTI]<metStop:
tti = aLIVETIME[iTI]
coordsSCZ = SkyCoord(aRA_SCZ[iTI], aDEC_SCZ[iTI], unit="deg")
coordsZenith = SkyCoord(aRA_ZENITH[iTI], aDEC_ZENITH[iTI], unit="deg")
angSCZ = coordsSCZ.separation(coordsTgt)
degSCZ = float(angSCZ.to_string(unit=u.deg, decimal=True))
angZenith = coordsZenith.separation(coordsTgt)
degZenith = float(angZenith.to_string(unit=u.deg, decimal=True))
if iTIR==0:
if degZenith>=zcut:
print 'Your target is wihin Earthlimb (Z>{2}deg). ({0},{1})'.format(aSTART[iTI]-torigin, degZenith, zcut)
elif degSCZ>=thcut:
print 'Your target is outdside of the FoV (theta>{2}deg). ({0},{1})'.format(aSTART[iTI]-torigin, degSCZ, thcut)
else:
validtimes.append([max(metStart, aSTART[iTI])-torigin])
elif degZenith>=zcut and degZenith_prev<zcut: # entering Earthlimb
print 'Your target is entring Earthlimb (Z>{4}deg). ({0},{1})->({2},{3})'.format(start_prev-torigin, degZenith_prev, aSTART[iTI]-torigin, degZenith, zcut)
if len(validtimes)>0 and len(validtimes[-1])<2: #degSCZ<thcut:
if stop_prev==aSTART[iTI]:
tcross = aSTART[iTI] + (aSTART[iTI]-start_prev)/(degZenith-degZenith_prev)*(zcut-degZenith)
else:
tcross = start_prev
print 'Crossing time:', tcross
validtimes[-1].append(tcross-torigin)
else:
print 'Your target is still outside of FoV (theta>={4}deg). ({0},{1})->({2},{3})'.format(start_prev-torigin, degSCZ_prev, aSTART[iTI]-torigin, degSCZ, thcut)
elif degSCZ>=thcut and degSCZ_prev<thcut: # exiting FoV
print 'Your target is exiting FoV (theta>{4}deg). ({0},{1})->({2},{3})'.format(start_prev, degSCZ_prev, aSTART[iTI]-torigin, degSCZ, thcut)
if len(validtimes)>0 and len(validtimes[-1])<2: #degZenith_prev<zcut:
if stop_prev==aSTART[iTI]:
tcross = aSTART[iTI] + (aSTART[iTI]-start_prev)/(degSCZ-degSCZ_prev)*(thcut-degSCZ)
else:
tcross = start_prev
print 'Crossing time:', tcross
validtimes[-1].append(tcross-torigin)
else:
print 'Your target is still within Earthlimb (Z>{4}deg). ({0},{1})->({2},{3})'.format(start_prev-torigin, degZenith_prev, aSTART[iTI]-torigin, degZenith, zcut)
elif degZenith<zcut and degZenith_prev>=zcut: # exiting Earthlimb
print 'Your target is exiting Earthlimb (Z>{4}deg). ({0},{1})->({2},{3})'.format(start_prev, degZenith_prev, aSTART[iTI]-torigin, degZenith, zcut)
if len(validtimes)==0 or len(validtimes[-1])==2: #degSCZ<thcut:
if stop_prev==aSTART[iTI]:
tcross = aSTART[iTI] + (aSTART[iTI]-start_prev)/(degZenith-degZenith_prev)*(zcut-degZenith)
else:
tcross = aSTART[iTI]
print 'Crossing time:', tcross
validtimes.append([aSTART[iTI]-torigin])
else:
print 'Your target is still outside of FoV (theta>={4}deg). ({0},{1})->({2},{3})'.format(start_prev-torigin, degSCZ_prev, aSTART[iTI]-torigin, degSCZ, thcut)
elif degSCZ<thcut and degSCZ_prev>=thcut: # entering FoV
print 'Your target is entering FoV (theta<{4}deg). ({0},{1})->({2},{3})'.format(start_prev, degSCZ_prev, aSTART[iTI]-torigin, degSCZ, thcut)
if len(validtimes)==0 or len(validtimes[-1])==2: #degZenith<zcut:
if stop_prev==aSTART[iTI]:
tcross = aSTART[iTI] + (aSTART[iTI]-start_prev)/(degZenith-degZenith_prev)*(zcut-degZenith)
else:
tcross = aSTART[iTI]
print 'Crossing time:', tcross
validtimes.append([aSTART[iTI]-torigin])
else:
print 'Your target is still within Earthlimb (Z>{4}deg). ({0},{1})->({2},{3})'.format(start_prev-torigin, degZenith_prev, aSTART[iTI]-torigin, degZenith, zcut)
elif degSCZ<thcut and degZenith<zcut and aSTART[iTI]-stop_prev>1:
print 'Gap in observation from {0} - {1}'.format(stop_prev-torigin, aSTART[iTI]-torigin)
validtimes[-1].append(stop_prev-torigin)
validtimes.append([aSTART[iTI]-torigin])
degZenith_prev = degZenith
degSCZ_prev = degSCZ
start_prev = aSTART[iTI]
stop_prev = aSTOP[iTI]
iTIR +=1
if iTI%300==0:
print iTI, 'Time:', aSTART[iTI]-torigin, 'RA:', aRA_SCZ[iTI], 'DEC:', aDEC_SCZ[iTI], 'Zenith:', degZenith, 'Inclination:', degSCZ, 'LAT_MODE:', tbdataSC.field('LAT_MODE')[iTI]#math.degrees(aAngSCY[1]), math.degrees(math.pi/2.-aAngSCY[0]), degZenith, math.degrees(radSCY)
sys.stdout.flush()
if len(validtimes[-1])<2:
validtimes[-1].append(min(metStop, aSTART[nTI-1])-torigin)
return validtimes
@click.command()
@click.argument('scfiles', type=str)
@click.argument('ra', type=float)
@click.argument('dec', type=float)
@click.option('--zcut', type=float, default=100.)
@click.option('--torigin', type=float, default=0.)
@click.option('--start', type=float, default=0)
@click.option('--stop', type=float, default=599529605) #2020-01-01
def main(scfiles, ra, dec, zcut, start, stop, torigin):
gti = find_cross_earthlimb(scfiles, ra, dec, start, stop, zcut, torigin)
print gti
if __name__ == '__main__':
main()