;+
; NAME:
;	vu_point_source__define
; PURPOSE:
;	Automatic definition of structure for storing parameters
;	for Nagoya IPS observations
; CATEGORY:
;	tomography
; CALLING SEQUENCE:
	PRO vu_point_source__define
; INCLUDE:
	@compile_opt.pro		; On error, return to caller
; PROCEDURE:
;	Called automatically when when using expression {vu_point_source}
;
;	Should be used only by href=vu_point_source= (which also takes
;	care of the initialization of some of the fields).
;	All angles are stored in the structure in degrees. vu_point_source
;	takes care of the conversion to radians/degrees using the
;	usual keyword /degrees.
; MODIFICATION HISTORY:
;	JAN-2001, Paul Hick (UCSD/CASS)
;	SEP-2004, Paul Hick (UCSD/CASS)
;		Renamed from ips_point_source. Added fields for Thomson
;		scattering brightness, pB and circle sizes

	tmp = { vu_point_source,$
		name: 'name',		$	; Name of source
		pp	: fltarr(2),	$	; RA and declination

		tt	: !TheTime, 	$	; Time of observation

		gg	: 0.0,			$	; IPS g-level
		vv	: 0.0,			$	; IPS speed
		bb  : 0.0,			$	; Thomson scattering brightness
		pb  : 0.0,			$	; Polarization brightness

		sz  : 0.0,			$	; Base (minimum) circle size

		szgg: 0.0,			$	; Circle size increase per unit of g-level
		szvv: 0.0,			$	; Circle size increase per km/s
		szbb: 0.0,			$	; Circle size increase per S10
		szpb: 0.0,			$	; Circle size increase per S10

		xy	: lonarr(2)		}
;-
RETURN  &  END