Output Product: HEALPix Effective Coverage Mask¶

Metadata¶

Data product name	DpdHealpixEffectiveCoverageVMPZ
Data product custodian	IDVMPZ
Name of the Schema file	euc-le3-id-vmpz-HealpixEffectiveCoverageMask.xsd
Last Edited for DPDD Version	2.0
Processing Element(s) creating/using the data product	Creators: VMPZ_Main (LE3_VMPZ_ID_Main) Consumers: VMPZ_Visibility (LE3_VMPZ_ID_Visibility)
Processing function using the data product	2PCF-WL, PK-WL, 2PCF-GC, 3PCF-GC, PK-GC, DET-CL, PROF-CL, VMSP-ID SWG-GC, SWG-WL, SWG-CL
Proposed for inclusion in EAS/SAS	This product is proposed for inclusion in SAS: yes This product is used by different PFs in OU-LE3 and expected to be used in scientific analysis in SWG-GC, SWG-WL and SWG-CL.

Data Product Elements¶

Header	object of type sys:genericHeader
Data	object of type vmpzid:effectiveCoverageMaskHealpixVMPZ
QualityFlags	object of type dqc:sqfPlaceHolder
Parameters	object of type ppr:genericKeyValueParameters

Detailed Description of the Data Product¶

This output product is between 0 and 1. It is essentially obtained from the combination of the footprint with extra excluded regions corresponding to regions flagged in the bit mask and RMS image collected in MER MERMosaic. Both Euclid and EXT bands are combined in a single mask.

It includes the EffectiveCoverageMaskHealpix metadata, a container with a FITS file (of type le3.id.vmpz.healpixeffectivecoveragemask) describing the effective coverage mask for the survey in (partial) HEALPix format, combining all the observed band/instrument (Euclid and EXT), and a raw description with polygons of the envelope of the sky covered is added as well to ease future queries on the product (SpatialCoverage metadata, spatialFootprint). Finally, the mask parameters EffectiveCoverageMaskHealpixParams can optionally be associated to the product.

Keywords (Primary HDU)¶

The primary HDU is expected to contain the following keywords, characterizing important parameters of the input product:

Time given with format ‘yyyy-mm-ddThh:mm:ss.sss’: and basic software parameters:

SOFTNAME: name of software used [StringKeyword]
SOFTVERS: version of software used [StringKeyword]
SOFTINST: institute developing the software [StringKeyword]

Partial HEALPix Footprint Table (First Extension, Binary Table)¶

The following keywords are used to describe what HEALPix conventions are followed:

FIX THIS LINE PrintHDUTableContents fit/euc-le3-id.xml le3.id.vmpz.healpixeffectivecoveragemask COVERAGE_MASK

TTYPE1 (= ‘PIXEL’) [StringKeyword]
TFORM1 (= ‘K’) [StringKeyword]
TTYPE2 (= ‘WEIGHT’) [StringKeyword]
TFORM2 (= ‘E’) [StringKeyword]
PIXTYPE (= ‘HEALPIX’) [StringKeyword]
ORDERING (= ‘RING’ or ‘NESTED’) [StringKeyword]
COORDSYS (= ‘C’=celestial, ‘E’=ecliptic or ‘G’=galactic) [StringKeyword]
EXTNAME (= ‘EFFECTIVE_COVERAGE_MASK’) [StringKeyword]
NSIDE [IntegerKeyword]
INDEXSCHM (= ‘EXPLICIT’) [StringKeyword]

The table is then expected to contain the following columns:

PIXEL: index of pixel [K, int64]
WEIGHT: weight associated to pixel in [0,1] indicating the fraction of the pixel actually covered by the
footprint and not in the bit mask (1: not observed/flagged regions) [E, float32]