def pick_star(g):
"""A task to check to see if the current star is okay, and if not,
to find a new star and move to it.
"""
current_file = "current_object"
exposure_file = "exptime"
salt_lat = Angle("-32:22:32 degree")
catalog = "star.lst"
# ra,dec,ha,lst,alt,az,airmass,pier = status(g)
alt = Angle("%s degree" % g.alt())
az = Angle("%s degree" % g.az())
pier = g.pier().strip().lower()
if (
pier == "east"
and airmass(alt) < 1.15
and not (alt.degree < 75.0 and 285.0 < az.degree < 300.0)
and os.path.isfile(current_file)
):
print "Fine to stay here"
return
try:
sid_current = open(current_file).read().strip()
except:
sid_current = None
print sid_current
# get the best object
try:
# sid, ra, dec = hrstar.best_star(lst,catalog=catalog, lat=salt_lat)
sid, ra, dec = hrstar_with_precess_WEST.best_star(g.lst(), int(2014), catalog=catalog, lat=salt_lat)
except ValueError:
print "No other acceptable candidates, so best to stay here"
return
# get current object
if sid == sid_current:
print "Current object is still best candidate"
return
# Move to the new best object
print "Slewing to HR %s at RA=%s and Dec=%s" % (sid, ra, dec)
slew(g, ra, dec)
# update current value
if os.path.isfile(current_file):
os.remove(current_file)
fout = open(current_file, "w")
fout.write("%s" % sid)
fout.close()
# update the exposure time
if os.path.isfile(exposure_file):
os.remove(exposure_file)
fout = open(exposure_file, "w")
fout.write("3.0e-3")
fout.close()
def pick_star(g):
"""A task to check to see if the current star is okay, and if not,
to find a new star and move to it.
"""
current_file = 'current_object'
exposure_file = 'exptime'
salt_lat = Angle("-32:22:32 degree")
catalog = 'star.lst'
#ra,dec,ha,lst,alt,az,airmass,pier = status(g)
alt = Angle('%s degree' % g.alt())
az = Angle('%s degree' % g.az())
pier = g.pier().strip().lower()
if pier == 'east' and airmass(alt) < 1.15 and not (
alt.degree < 75.0
and 285.0 < az.degree < 300.0) and os.path.isfile(current_file):
print 'Fine to stay here'
return
try:
sid_current = open(current_file).read().strip()
except:
sid_current = None
print sid_current
#get the best object
try:
#sid, ra, dec = hrstar.best_star(lst,catalog=catalog, lat=salt_lat)
sid, ra, dec = hrstar_with_precess_WEST.best_star(g.lst(),
int(2014),
catalog=catalog,
lat=salt_lat)
except ValueError:
print 'No other acceptable candidates, so best to stay here'
return
#get current object
if sid == sid_current:
print 'Current object is still best candidate'
return
#Move to the new best object
print 'Slewing to HR %s at RA=%s and Dec=%s' % (sid, ra, dec)
slew(g, ra, dec)
#update current value
if os.path.isfile(current_file): os.remove(current_file)
fout = open(current_file, 'w')
fout.write('%s' % sid)
fout.close()
#update the exposure time
if os.path.isfile(exposure_file): os.remove(exposure_file)
fout = open(exposure_file, 'w')
fout.write('3.0e-3')
fout.close()
try:
sid = open(current_file).read().strip()
except Exception, e:
print e
return
#load catalog
star_dict = load_catalog(hr_file)
#get ra/dec for best object
ra = star_dict[sid][1]
dec = star_dict[sid][2]
ra = Angle(ra, unit='hour')
dec = Angle(dec, unit='degree')
RA_now, Dec_now = Apply_precess(ra, dec, Year_NOW)
#slew telescope to position
with GTO900() as g:
print 'Move to: RA(2000)=%s Dec(2000)=%s - RA(NOW)=%s Dec(NOW)=%s' % (
ra, dec, RA_now, Dec_now)
#slew(g, ra, dec)
slew(g, RA_now, Dec_now)
if __name__ == '__main__':
#goto_hr()
import sys
goto_hr(int(sys.argv[1]),
current_file='current_object',
hr_file='star.lst')
def goto_hr(Year_NOW,current_file='current_object', hr_file='star.lst'):
"""Go to the current object"""
try:
sid = open(current_file).read().strip()
except Exception, e:
print e
return
#load catalog
star_dict=load_catalog(hr_file)
#get ra/dec for best object
ra = star_dict[sid][1]
dec = star_dict[sid][2]
ra = Angle(ra, unit='hour')
dec = Angle(dec, unit='degree')
RA_now, Dec_now = Apply_precess(ra,dec,Year_NOW)
#slew telescope to position
with GTO900() as g:
print 'Move to: RA(2000)=%s Dec(2000)=%s - RA(NOW)=%s Dec(NOW)=%s'%(ra, dec, RA_now, Dec_now)
#slew(g, ra, dec)
slew(g, RA_now, Dec_now)
if __name__=='__main__':
#goto_hr()
import sys
goto_hr(int(sys.argv[1]),current_file='current_object', hr_file='star.lst')