meta/l3_wcsinfo-1.0.0
WCS Information
Outline
Schema Definitions ¶
This type is an object with the following properties:
ra_ref
number Required Right Ascension of Projection Region Center (deg)
Right ascension in units of degrees at the center of the projection region over which the world coordinate system (WCS) of this image is defined. If this product does not use the Roman sky tessellation, then this keyword will be equal to meta.wcsinfo.ra.
dec_ref
number Required Declination of Projection Region Center (deg)
Declination in units of degrees at the center of the projection region over which the world coordinate system (WCS) of this image is defined. If this product does not use the Roman sky tessellation, then this keyword will be equal to meta.wcsinfo.dec.
x_ref
number Required X Coordinate of Projection Region Center
Pixel X coordinate at the center of the projection region over which the world coordinate system (WCS) of this image is defined. If the projection region is larger than the image contained within this file, then the value of x_ref may or may not be contained within the boundaries of the data array in this file.
y_ref
number Required Y Coordinate of Projection Region Center
Pixel Y coordinate at the center of the projection region over which the world coordinate system (WCS) of this image is defined. If the projection region is larger than the image contained within this file, then the value of y_ref may or may not be contained within the boundaries of the data array in this file.
pixel_scale_ref
number Required Pixel Scale at Projection Region Center (arcseconds per pixel)
Pixel scale in units of arcseconds per pixel at the center of the projection region. If this product does not use the Roman sky tessellation, then this keyword will be equal to meta.wcsinfo.pixel_scale.
pixel_scale
number Required Pixel Scale at Image Center (arcseconds per pixel)
Pixel scale in units of arcseconds per pixel at the center of the image in this file.
projection
string Required Projection Type
No length restrictionType of projection used for the world coordinate system (WCS). A value of “TAN” indicates a tangent plane projection.
Only the following values are valid for this node:
TAN
s_region
string Required Spatial Extent of the Image
No length restrictionThe region of the sky enclosed by the pixel data contained within this file. This is given as a polygon stored as a string with the vertices defined by a list of right ascension and declination pairs in units of degrees.
image_shape
array Required Shape of Image (pixels)
Shape of the image (nx, ny) in units of pixels.
Minimum length: 2
Maximum length: 2
Items in the array are restricted to the following types:
integer
ra
number Required Right Ascension of Image Center (deg)
Right ascension in units of degrees at the center of the image.
dec
number Required Declination of Image Center (deg)
Declination in units of degrees at the center of the image.
orientation
number Required Image Orientation (deg)
Angle in units of degrees between celestial North and the image y-axis at the center of the image turning positive in the direction of increasing right ascension.
orientation_ref
number Required Projection Region Orientation (deg)
Angle in units of degrees between celestial North and the image y-axis at the center of the projection region turning positive in the direction of increasing right ascension. If this product does not use the Roman sky tessellation, then this keyword will be equal to meta.wcsinfo.orientation.
skycell_name
object Required Skycell Name
Name of the skycell in the Roman sky tessellation to which this product corresponds. If this product is not a skycell product, this field will be None.
This node must validate against any of the following:
string
Maximum length: 30
null
rotation_matrix
array Required No length restriction2x2 rotation matrix
Items in the array are restricted to the following types:
No length restrictionarray
Items in the array are restricted to the following types:
number
Original Schema ¶
%YAML 1.1
---
$schema: asdf://stsci.edu/datamodels/roman/schemas/rad_schema-1.0.0
id: asdf://stsci.edu/datamodels/roman/schemas/meta/l3_wcsinfo-1.0.0
title: WCS Information
type: object
properties:
ra_ref:
title: Right Ascension of Projection Region Center (deg)
description: >
Right ascension in units of degrees at the center of
the projection region over which the world coordinate system
(WCS) of this image is defined. If this product does not use the
Roman sky tessellation, then this keyword will be equal to
meta.wcsinfo.ra.
type: number
archive_catalog:
datatype: float
destination: [WFIMosaic.ra_ref]
dec_ref:
title: Declination of Projection Region Center (deg)
description: >
Declination in units of degrees at the center of the
projection region over which the world coordinate system (WCS)
of this image is defined. If this product does not use the Roman
sky tessellation, then this keyword will be equal to
meta.wcsinfo.dec.
type: number
archive_catalog:
datatype: float
destination: [WFIMosaic.dec_ref]
x_ref:
title: X Coordinate of Projection Region Center
description: >
Pixel X coordinate at the center of the projection
region over which the world coordinate system (WCS) of this
image is defined. If the projection region is larger than the
image contained within this file, then the value of x_ref may or
may not be contained within the boundaries of the data array in
this file.
type: number
archive_catalog:
datatype: float
destination: [WFIMosaic.x_ref]
y_ref:
title: Y Coordinate of Projection Region Center
description: >
Pixel Y coordinate at the center of the projection
region over which the world coordinate system (WCS) of this
image is defined. If the projection region is larger than the
image contained within this file, then the value of y_ref may or
may not be contained within the boundaries of the data array in
this file.
type: number
archive_catalog:
datatype: float
destination: [WFIMosaic.y_ref]
pixel_scale_ref:
title: Pixel Scale at Projection Region Center (arcseconds per pixel)
description: >
Pixel scale in units of arcseconds per pixel at the
center of the projection region. If this product does not use
the Roman sky tessellation, then this keyword will be equal to
meta.wcsinfo.pixel_scale.
type: number
archive_catalog:
datatype: float
destination: [WFIMosaic.pixel_scale_ref]
pixel_scale:
title: Pixel Scale at Image Center (arcseconds per pixel)
description: >
Pixel scale in units of arcseconds per pixel at the center of the image in this file.
type: number
archive_catalog:
datatype: float
destination: [WFIMosaic.pixel_scale]
projection:
title: Projection Type
description: >
Type of projection used for the world coordinate
system (WCS). A value of "TAN" indicates a tangent plane projection.
type: string
enum: ["TAN"]
archive_catalog:
datatype: nvarchar(50)
destination: [WFIMosaic.projection]
s_region:
title: Spatial Extent of the Image
description: >
The region of the sky enclosed by the pixel data
contained within this file. This is given as a polygon stored as
a string with the vertices defined by a list of right ascension
and declination pairs in units of degrees.
type: string
archive_catalog:
datatype: nvarchar(max)
destination: [WFIMosaic.s_region]
image_shape:
title: Shape of Image (pixels)
description: Shape of the image (nx, ny) in units of pixels.
type: array
minItems: 2
maxItems: 2
items:
type: integer
archive_catalog:
datatype: nvarchar(50)
destination: [WFIMosaic.image_shape]
ra:
title: Right Ascension of Image Center (deg)
description: Right ascension in units of degrees at the center of the image.
type: number
archive_catalog:
datatype: float
destination: [WFIMosaic.ra]
dec:
title: Declination of Image Center (deg)
description: Declination in units of degrees at the center of the image.
type: number
archive_catalog:
datatype: float
destination: [WFIMosaic.dec]
orientation:
title: Image Orientation (deg)
description: >
Angle in units of degrees between celestial North and
the image y-axis at the center of the image turning positive in
the direction of increasing right ascension.
type: number
archive_catalog:
datatype: float
destination: [WFIMosaic.orientation]
orientation_ref:
title: Projection Region Orientation (deg)
description: >
Angle in units of degrees between celestial North and
the image y-axis at the center of the projection region turning
positive in the direction of increasing right ascension. If this
product does not use the Roman sky tessellation, then this
keyword will be equal to meta.wcsinfo.orientation.
type: number
archive_catalog:
datatype: float
destination: [WFIMosaic.orientation_ref]
skycell_name:
title: Skycell Name
description: >
Name of the skycell in the Roman sky tessellation to
which this product corresponds. If this product is not a skycell
product, this field will be None.
anyOf:
- type: string
maxLength: 30
- type: "null"
archive_catalog:
datatype: nvarchar(30)
destination: [WFIMosaic.skycell_name]
rotation_matrix:
title: 2x2 rotation matrix
type: array
items:
type: array
items:
type: number
sdf:
special_processing: VALUE_REQUIRED
source:
origin: TBD
archive_catalog:
datatype: nvarchar(3500)
destination: [WFIMosaic.rotation_matrix]
required:
[
ra_ref,
dec_ref,
x_ref,
y_ref,
pixel_scale_ref,
pixel_scale,
projection,
s_region,
image_shape,
ra,
dec,
orientation,
orientation_ref,
skycell_name,
rotation_matrix,
]