def telescope_position(obj_name,date):
'''Given an object name and date, return the precessed RA, DEC, hour-angle,
altitude, and azimuth as strings.
'''
obj = Object.objects.get(name=obj_name)
obj.epoch = date
return (obj.PrecRAh(),
obj.PrecDecd(),
ephem.hours(obj.hour_angle()*15.0*pi/180.),
"%.2f" % (obj.altitude()),
"%.2f" % (obj.azimuth()))
def detail(request, object_id):
obj = Object.objects.get(id=object_id)
message = None
error = None
extras = "?"
epoch = None
tz_offset = 0
if 'object_list_form' in request.session:
tz_offset = float(request.session['object_list_form']['tz_offset'])
if tz_offset is None:
tz_offset = 0
date = get_current_time(request)
obj.epoch = date
if request.method == 'POST':
if 'action' in request.POST:
if request.POST['action'] == 'GOTO':
request.session['prev_tel_obj'] = request.session.get('cur_tel_obj',
'Park')
request.session['cur_tel_obj'] = obj.name
request.session['tel_status'] = 'SLEW'
elif request.POST['action'] == "Sync":
request.session['prev_tel_obj'] = request.session.get('cur_tel_obj',
'Park')
request.session['tel_status'] = 'IDLE'
elif request.POST['action'] == "Cancel":
request.session['cur_tel_obj'] = request.session.get('prev_tel_obj',
'Park')
request.session['tel_status'] = 'IDLE'
elif request.POST['action'] == "Update":
comments = request.POST['comments']
rating = int(request.POST.get('rating',0))
obj.comments = comments
obj.rating = rating
obj.save()
elif 'eyepiece' in request.POST:
request.session['cur_eye'] = request.POST['eyepiece']
cur_tel_obj = request.session.get('cur_tel_obj', 'Park')
prev_tel_obj = request.session.get('prev_tel_obj', 'Park')
tel_status = request.session.get('tel_status', 'IDLE')
eyepiece = request.session.get('cur_eye', None)
if eyepiece is not None:
FOV = settings.fovs[eyepiece]
else:
FOV = settings.FINDER_SIZE
if FOV != settings.FINDER_BASE_SIZE:
extras += "size=%d&" % (FOV)
if settings.FINDER_REVERSE:
extras += "reverse=1&"
if settings.FINDER_LOW:
extras += "low=%d&" % (settings.FINDER_LOW)
if settings.FINDER_HIGH:
extras += "high=%d&" % (settings.FINDER_HIGH)
extras = extras[:-1] # cleanup trailing & or ?
t = loader.get_template('navigator/object_detail.html')
# Now deal with telescope position
if tel_status == "SLEW":
tel_RA,tel_DEC,tel_ha,tel_alt,tel_az = telescope_position(prev_tel_obj, date)
new_RA,new_DEC,new_ha,new_alt,new_az = telescope_position(cur_tel_obj, date)
# Now we move the dome
delta_az = float(new_az) - float(tel_az)
if delta_az < -180:
delta_az += 360
elif delta_az > 180:
delta_az -= 360
if delta_az > 0:
az_move = "Dome Right %.2f" % (delta_az)
else:
az_move = "Dome Left %.2f" % (-delta_az)
# Now we move in RA
delta_ra = (ephem.hours(new_RA) - ephem.hours(tel_RA))/pi*12.
if delta_ra < 0:
ra_move = "Slew West %.2f h" % (abs(delta_ra))
else:
ra_move = "Slew East %.2f h" % (abs(delta_ra))
# Now we move in DEC
delta_dec = (ephem.degrees(new_DEC) - ephem.degrees(tel_DEC))/pi*180
if delta_dec < -180: delta_dec += 180
if delta_dec > 180: delta_dec -= 180
if delta_dec < 0:
dec_move = "Slew South %.2f" % (abs(delta_dec))
else:
dec_move = "Slew North %.2f" % (abs(delta_dec))
else:
az_move = None
ra_move = None
dec_move = None
tel_RA,tel_DEC,tel_ha,tel_alt,tel_az = telescope_position(cur_tel_obj, date)
embed_plot = plot_objs.plot_alt_map([obj], date=date, toff=tz_offset)
c = RequestContext(request, {
'object':obj, 'extras':extras,
'finder_orientation':settings.FINDER_ORIENTATION,
'finder_size':FOV,
'eyepieces':settings.fovs,'cur_eyepiece':eyepiece,
'message':message, 'error':error, 'epoch':epoch,
'tel_RA':tel_RA,'tel_DEC':tel_DEC,'tel_ha':tel_ha,'tel_alt':tel_alt,
'tel_az':tel_az, 'tel_status':tel_status, 'az_move':az_move,
'ra_move':ra_move, 'dec_move':dec_move, 'embed_plot':embed_plot,
})
return HttpResponse(t.render(c))
def LST2hms(value): d = ephem.hours(value) return str(d)
def LST2hm(value):
d = ephem.hours(value)
return(":".join(string.split(str(d),":")[0:2]))
def angle2hm(value):
d = ephem.hours(value*pi/180.)
return str(":".join(string.split(str(d),":")[0:2]))
def angle2hms(value): d = ephem.hours(value*pi/180.) return str(d)
