def __init__(self,
start,
stop,
duration,
offset = Coord(HOR,
VAngle(1),
VAngle(0))):
"""
@param start: elevation start
@type start: VAngle
@param stop: elevation stop
@type stop: stop
@param duration: skydip duration
@type duration: seconds
@param offset: skydip offset from specified target
@type offset: frame.Coord
"""
ScanMode.__init__(self)
self.start = start
self.stop = stop
self.duration = duration
self.offset = offset
# The minimum observation is composed of 2 subscans
# one sidereal subscan to position the antenna in
# proximity of the source, and one OTF subscan to perform
# the skydip acquisition
self.unit_subscans = 2
def __init__(self, feeds, duration, sequence):
ScanMode.__init__(self)
self.feed_a = feeds[0]
self.feed_b = feeds[1]
self.duration = duration
self.sequence = sequence
self.unit_subscans = sum(el[0] for el in self.sequence)
self.frame = frame.NULL
def __init__(self, duration, offset_lon, offset_lat, offset_frame, sequence):
ScanMode.__init__(self)
self.offset_lon = offset_lon
self.offset_lat = offset_lat
if (not offset_frame) or offset_frame == NULL:
self.offset_frame = self.frame
else:
self.offset_frame = offset_frame
self.unit_subscans = sum(el[0] for el in sequence)
self.sequence = sequence
self.duration = duration
self.frame = NULL
def __init__(self,
frame,
length,
speed):
"""
@param frame: The scan L{frame}
@type frame: L{frame.Frame}
@param length: length of each otf subscan in decimal degrees
@type length: angles.Angle
@param speed: speed of each otf subscan in degrees per minute
"""
ScanMode.__init__(self)
self.length = length
self.frame = frame
self.speed = speed
#duration is expressed in seconds
self.duration = self.length.deg / self.speed * 60
logger.debug("scan %d duration: %f" % (self.ID, self.duration))
#The minimum observation is composed of 4 subscans
# to form a cross over the source in both directions
self.unit_subscans = 4
def __init__(self, frame, start_point, scan_axis,
length_x, length_y, spacing):
"""
Constructor
@param frame: scan frame
@type frame: frame.Frame
@param start_point: one of TL, TR, BL, BR
@param scan_axis: one of LON LAT RA DEC AZ EL BOTH, the constant axis of
each subscan
@param length_x: map width in degrees
@type length_x: VAngle
@param length_y: map height in degrees
@type length_y: VAngle
@param spacing: separation between subsequent subscans
@type spacing: VAngle
"""
ScanMode.__init__(self)
self.frame = frame
self.start_point = start_point
self.scan_axis = scan_axis
self.length_x = length_x
self.length_y = length_y
self.spacing = spacing
