def generate_blobs(nside,
mixed_pairs=False,
nexp=1,
no_pairs=False,
offset=None,
template_weight=6.):
target_map = wfd_only_fp(nside=nside)
norm_factor = calc_norm_factor(target_map)
# List to hold all the surveys (for easy plotting later)
surveys = []
# Set up observations to be taken in blocks
filter1s = ['u', 'g', 'r', 'i', 'z', 'y']
if mixed_pairs:
filter2s = [None, 'r', 'i', 'z', None, None]
else:
filter2s = [None, 'g', 'r', 'i', None, None]
if no_pairs:
filter2s = [None, None, None, None, None, None]
# Ideal time between taking pairs
pair_time = 22.
times_needed = [pair_time, pair_time * 2]
for filtername, filtername2 in zip(filter1s, filter2s):
detailer_list = []
detailer_list.append(
detailers.Camera_rot_detailer(min_rot=-87., max_rot=87.))
detailer_list.append(detailers.Close_alt_detailer())
bfs = []
bfs.append(
bf.M5_diff_basis_function(filtername=filtername, nside=nside))
if filtername2 is not None:
bfs.append(
bf.M5_diff_basis_function(filtername=filtername2, nside=nside))
bfs.append(
bf.Target_map_basis_function(filtername=filtername,
target_map=target_map[filtername],
out_of_bounds_val=np.nan,
nside=nside,
norm_factor=norm_factor))
if filtername2 is not None:
bfs.append(
bf.Target_map_basis_function(
filtername=filtername2,
target_map=target_map[filtername2],
out_of_bounds_val=np.nan,
nside=nside,
norm_factor=norm_factor))
bfs.append(
bf.Slewtime_basis_function(filtername=filtername, nside=nside))
bfs.append(bf.Strict_filter_basis_function(filtername=filtername))
bfs.append(
bf.N_obs_per_year_basis_function(filtername=filtername,
nside=nside,
footprint=target_map[filtername],
n_obs=3,
season=300.))
if filtername2 is not None:
bfs.append(
bf.N_obs_per_year_basis_function(
filtername=filtername2,
nside=nside,
footprint=target_map[filtername2],
n_obs=3,
season=300.))
# Masks, give these 0 weight
bfs.append(
bf.Zenith_shadow_mask_basis_function(nside=nside,
shadow_minutes=60.,
max_alt=76.))
bfs.append(
bf.Moon_avoidance_basis_function(nside=nside, moon_distance=30.))
filternames = [
fn for fn in [filtername, filtername2] if fn is not None
]
bfs.append(bf.Filter_loaded_basis_function(filternames=filternames))
if filtername2 is None:
time_needed = times_needed[0]
else:
time_needed = times_needed[1]
bfs.append(bf.Time_to_twilight_basis_function(time_needed=time_needed))
bfs.append(bf.Not_twilight_basis_function())
bfs.append(bf.Planet_mask_basis_function(nside=nside))
weights = np.array([
3.0, 3.0, .3, .3, 3., 3., template_weight, template_weight, 0., 0.,
0., 0., 0., 0.
])
if filtername2 is None:
# Need to scale weights up so filter balancing still works properly.
weights = np.array([
6.0, 0.6, 3., 3., template_weight * 2, 0., 0., 0., 0., 0., 0.
])
if filtername2 is None:
survey_name = 'blob, %s' % filtername
else:
survey_name = 'blob, %s%s' % (filtername, filtername2)
if filtername2 is not None:
detailer_list.append(
detailers.Take_as_pairs_detailer(filtername=filtername2))
surveys.append(
Blob_survey(bfs,
weights,
filtername1=filtername,
filtername2=filtername2,
ideal_pair_time=pair_time,
nside=nside,
survey_note=survey_name,
ignore_obs='DD',
dither=True,
nexp=nexp,
detailers=detailer_list))
return surveys
def generate_blobs(nside,
nexp=1,
exptime=30.,
filter1s=['u', 'u', 'g', 'r', 'i', 'z', 'y'],
filter2s=['g', 'r', 'r', 'i', 'z', 'y', 'y'],
pair_time=22.,
camera_rot_limits=[-80., 80.],
n_obs_template=3,
season=300.,
season_start_hour=-4.,
season_end_hour=2.,
shadow_minutes=60.,
max_alt=76.,
moon_distance=30.,
ignore_obs='DD',
m5_weight=6.,
footprint_weight=0.6,
slewtime_weight=3.,
stayfilter_weight=3.,
template_weight=12.,
footprints=None):
"""
Generate surveys that take observations in blobs.
Parameters
----------
nside : int (32)
The HEALpix nside to use
nexp : int (1)
The number of exposures to use in a visit.
exptime : float (30.)
The exposure time to use per visit (seconds)
filter1s : list of str
The filternames for the first set
filter2s : list of str
The filter names for the second in the pair (None if unpaired)
pair_time : float (22)
The ideal time between pairs (minutes)
camera_rot_limits : list of float ([-80., 80.])
The limits to impose when rotationally dithering the camera (degrees).
n_obs_template : int (3)
The number of observations to take every season in each filter
season : float (300)
The length of season (i.e., how long before templates expire) (days)
season_start_hour : float (-4.)
For weighting how strongly a template image needs to be observed (hours)
sesason_end_hour : float (2.)
For weighting how strongly a template image needs to be observed (hours)
shadow_minutes : float (60.)
Used to mask regions around zenith (minutes)
max_alt : float (76.
The maximium altitude to use when masking zenith (degrees)
moon_distance : float (30.)
The mask radius to apply around the moon (degrees)
ignore_obs : str or list of str ('DD')
Ignore observations by surveys that include the given substring(s).
m5_weight : float (3.)
The weight for the 5-sigma depth difference basis function
footprint_weight : float (0.3)
The weight on the survey footprint basis function.
slewtime_weight : float (3.)
The weight on the slewtime basis function
stayfilter_weight : float (3.)
The weight on basis function that tries to stay avoid filter changes.
template_weight : float (12.)
The weight to place on getting image templates every season
"""
blob_survey_params = {
'slew_approx': 7.5,
'filter_change_approx': 140.,
'read_approx': 2.,
'min_pair_time': 15.,
'search_radius': 30.,
'alt_max': 85.,
'az_range': 90.,
'flush_time': 30.,
'smoothing_kernel': None,
'nside': nside,
'seed': 42,
'dither': True,
'twilight_scale': True
}
surveys = []
times_needed = [pair_time, pair_time * 2]
for filtername, filtername2 in zip(filter1s, filter2s):
detailer_list = []
detailer_list.append(
detailers.Camera_rot_detailer(min_rot=np.min(camera_rot_limits),
max_rot=np.max(camera_rot_limits)))
detailer_list.append(detailers.Close_alt_detailer())
# List to hold tuples of (basis_function_object, weight)
bfs = []
if filtername2 is not None:
bfs.append(
(bf.M5_diff_basis_function(filtername=filtername,
nside=nside), m5_weight / 2.))
bfs.append(
(bf.M5_diff_basis_function(filtername=filtername2,
nside=nside), m5_weight / 2.))
else:
bfs.append((bf.M5_diff_basis_function(filtername=filtername,
nside=nside), m5_weight))
if filtername2 is not None:
bfs.append((bf.Footprint_basis_function(filtername=filtername,
footprint=footprints,
out_of_bounds_val=np.nan,
nside=nside),
footprint_weight / 2.))
bfs.append((bf.Footprint_basis_function(filtername=filtername2,
footprint=footprints,
out_of_bounds_val=np.nan,
nside=nside),
footprint_weight / 2.))
else:
bfs.append(
(bf.Footprint_basis_function(filtername=filtername,
footprint=footprints,
out_of_bounds_val=np.nan,
nside=nside), footprint_weight))
bfs.append((bf.Slewtime_basis_function(filtername=filtername,
nside=nside), slewtime_weight))
bfs.append((bf.Strict_filter_basis_function(filtername=filtername),
stayfilter_weight))
if filtername2 is not None:
bfs.append((bf.N_obs_per_year_basis_function(
filtername=filtername,
nside=nside,
footprint=footprints.get_footprint(filtername),
n_obs=n_obs_template,
season=season,
season_start_hour=season_start_hour,
season_end_hour=season_end_hour), template_weight / 2.))
bfs.append((bf.N_obs_per_year_basis_function(
filtername=filtername2,
nside=nside,
footprint=footprints.get_footprint(filtername2),
n_obs=n_obs_template,
season=season,
season_start_hour=season_start_hour,
season_end_hour=season_end_hour), template_weight / 2.))
else:
bfs.append((bf.N_obs_per_year_basis_function(
filtername=filtername,
nside=nside,
footprint=footprints.get_footprint(filtername),
n_obs=n_obs_template,
season=season,
season_start_hour=season_start_hour,
season_end_hour=season_end_hour), template_weight))
# Masks, give these 0 weight
bfs.append((bf.Zenith_shadow_mask_basis_function(
nside=nside,
shadow_minutes=shadow_minutes,
max_alt=max_alt,
penalty=np.nan,
site='LSST'), 0.))
bfs.append(
(bf.Moon_avoidance_basis_function(nside=nside,
moon_distance=moon_distance),
0.))
filternames = [
fn for fn in [filtername, filtername2] if fn is not None
]
bfs.append(
(bf.Filter_loaded_basis_function(filternames=filternames), 0))
if filtername2 is None:
time_needed = times_needed[0]
else:
time_needed = times_needed[1]
bfs.append(
(bf.Time_to_twilight_basis_function(time_needed=time_needed), 0.))
bfs.append((bf.Not_twilight_basis_function(), 0.))
bfs.append((bf.Planet_mask_basis_function(nside=nside), 0.))
# unpack the basis functions and weights
weights = [val[1] for val in bfs]
basis_functions = [val[0] for val in bfs]
if filtername2 is None:
survey_name = 'blob, %s' % filtername
else:
survey_name = 'blob, %s%s' % (filtername, filtername2)
if filtername2 is not None:
detailer_list.append(
detailers.Take_as_pairs_detailer(filtername=filtername2))
surveys.append(
Blob_survey(basis_functions,
weights,
filtername1=filtername,
filtername2=filtername2,
exptime=exptime,
ideal_pair_time=pair_time,
survey_note=survey_name,
ignore_obs=ignore_obs,
nexp=nexp,
detailers=detailer_list,
**blob_survey_params))
return surveys
def gen_blob_surveys(nside):
"""
make a quick set of blob surveys
"""
target_map = standard_goals(nside=nside)
norm_factor = calc_norm_factor(target_map)
filter1s = ['u', 'g'] # , 'r', 'i', 'z', 'y']
filter2s = [None, 'g'] # , 'r', 'i', None, None]
filter1s = ['g'] # , 'r', 'i', 'z', 'y']
filter2s = ['g'] # , 'r', 'i', None, None]
pair_surveys = []
for filtername, filtername2 in zip(filter1s, filter2s):
detailer_list = []
bfs = []
bfs.append(
bf.M5_diff_basis_function(filtername=filtername, nside=nside))
if filtername2 is not None:
bfs.append(
bf.M5_diff_basis_function(filtername=filtername2, nside=nside))
bfs.append(
bf.Target_map_basis_function(filtername=filtername,
target_map=target_map[filtername],
out_of_bounds_val=np.nan,
nside=nside,
norm_factor=norm_factor))
if filtername2 is not None:
bfs.append(
bf.Target_map_basis_function(
filtername=filtername2,
target_map=target_map[filtername2],
out_of_bounds_val=np.nan,
nside=nside,
norm_factor=norm_factor))
bfs.append(
bf.Slewtime_basis_function(filtername=filtername, nside=nside))
bfs.append(bf.Strict_filter_basis_function(filtername=filtername))
# Masks, give these 0 weight
bfs.append(
bf.Zenith_shadow_mask_basis_function(nside=nside,
shadow_minutes=60.,
max_alt=76.))
bfs.append(
bf.Moon_avoidance_basis_function(nside=nside, moon_distance=30.))
bfs.append(bf.Clouded_out_basis_function())
# feasibility basis fucntions. Also give zero weight.
filternames = [
fn for fn in [filtername, filtername2] if fn is not None
]
bfs.append(bf.Filter_loaded_basis_function(filternames=filternames))
bfs.append(bf.Time_to_twilight_basis_function(time_needed=22.))
bfs.append(bf.Not_twilight_basis_function())
bfs.append(bf.Planet_mask_basis_function(nside=nside))
weights = np.array(
[3.0, 3.0, .3, .3, 3., 3., 0., 0., 0., 0., 0., 0., 0.])
if filtername2 is None:
# Need to scale weights up so filter balancing still works properly.
weights = np.array([6.0, 0.6, 3., 3., 0., 0., 0., 0., 0., 0., 0.])
if filtername2 is None:
survey_name = 'blob, %s' % filtername
else:
survey_name = 'blob, %s%s' % (filtername, filtername2)
if filtername2 is not None:
detailer_list.append(
detailers.Take_as_pairs_detailer(filtername=filtername2))
pair_surveys.append(
Blob_survey(bfs,
weights,
filtername1=filtername,
filtername2=filtername2,
survey_note=survey_name,
ignore_obs='DD',
detailers=detailer_list))
return pair_surveys
