Bias Frame Product

Data product name

DpdExtDesBiasFrame

Data product custodian

OU-EXT

Data model tag

9.0.2

Name of the Schema file

euc-test-ext-des-BiasFrame.xsd

Schema documentation tag

Data product elements

Header of type: sys:genericHeader

Data of type: des:desBiasExposure

QualityFlags of type: dqc:sqfPlaceHolder

Parameters of type: ppr:genericKeyValueParameters

Processing Element(s) creating/using the data product

Processing function using the data product

EXT-DES

Detailed description of the data product

Also known as bias exposure in DES terminology. This is an input product to the DES pipeline. It contains 70 extensions (one for each DECam CCD) with the data of a single bias exposure.

The main elements inside this product are:

  • Observation: Contains information about the telescope pointing (Telra, Teldec, HourAngle, ZenithDistance, Epoch), the observation night and date, and the optical air mass.

  • Saturate: Global saturation threshold valid for amplifiers A and B.

  • DataStorage: Element that links to a FITS file containing the bias exposure image dataset.

FitsFormat id: ext.des.biasExposure

Table 4 GenericHDU - name: PRIMARY

Header Item

Type

Comment

SIMPLE

Logical

BITPIX

Integer

NAXIS

Integer

EXTEND

Logical

NEXTEND

Integer

PROCTYPE

String

PRODTYPE

String

DETSIZE

String

PIXSCAL1

Double

PIXSCAL2

Double

FILENAME

String

OBS-LONG

Double

TELESCOP

String

OBSERVAT

String

OBS-LAT

Double

OBS-ELEV

Double

INSTRUME

String

EXPREQ

Double

EXPTIME

Double

DARKTIME

Double

OBSID

String

DATE-OBS

String

TIME-OBS

String

MJD-OBS

Double

OPENSHUT

String

RADESYS

String

TIMESYS

String

EXPNUM

Integer

OBJECT

String

OBSTYPE

String

CAMSHUT

String

PROGRAM

String

OBSERVER

String

PROPOSER

String

DTPI

String

PROPID

String

EXCLUDED

String

SEQID

String

SEQNUM

Integer

SEQTOT

Integer

AOS

Logical

BCAM

Logical

GUIDER

Integer

SKYSTAT

Logical

FILTER

String

INSTANCE

String

ERRORS

String

TELEQUIN

Double

TELSTAT

String

RA

String

DEC

String

TELRA

String

TELDEC

String

TELFOCUS

String

VSUB

Logical

GSKYPHOT

Logical

LSKYPHOT

Logical

WINDSPD

Double

WINDDIR

Double

HUMIDITY

Double

PRESSURE

Double

DIMMSEE

Double

OUTTEMP

Double

AIRMASS

String

GSKYVAR

Double

GSKYHOT

Double

LSKYVAR

Double

LSKYHOT

Double

LSKYPOW

Double

MSURTEMP

Double

MAIRTEMP

Double

UPTRTEMP

Double

LWTRTEMP

Double

PMOSTEMP

Double

UTN-TEMP

Double

UTS-TEMP

Double

UTW-TEMP

Double

UTE-TEMP

Double

PMN-TEMP

Double

PMS-TEMP

Double

PMW-TEMP

Double

PME-TEMP

Double

DOMELOW

Double

DOMEHIGH

Double

DOMEFLOR

Double

LUTVER

String

MULTIEXP

Logical

SKYUPDAT

String

SISPIVER

String

CONSTVER

String

HDRVER

String

CHECKVER

String

CHECKSUM

String

DATASUM

String

DTSITE

String

DTTELESC

String

DTINSTRU

String

DTCALDAT

String

ODATEOBS

String

DTUTC

String

DTOBSERV

String

DTPROPID

String

DTPIAFFL

String

DTTITLE

String

DTCOPYRI

String

DTACQUIS

String

DTACCOUN

String

DTACQNAM

String

DTNSANAM

String

DT_RTNAM

String

DTQUEUE

String

DTSTATUS

String

SB_HOST

String

SB_ACCOU

String

SB_SITE

String

SB_LOCAL

String

SB_DIR1

String

SB_DIR2

String

SB_DIR3

String

SB_RECNO

Integer

SB_ID

String

SB_NAME

String

SB_RTNAM

String

RMCOUNT

Integer

RECNO

Integer

Followed by zero or more times the following

Table 5 ArrayHDU - name:

Header Item

Type

Comment

XTENSION

String

BITPIX

Integer

NAXIS

Integer

NAXIS1

Integer

NAXIS2

Integer

PCOUNT

Integer

GCOUNT

Integer

BZERO

Integer

BSCALE

Integer

BUNIT

String

WCSAXES

Integer

DETSIZE

String

TRIMSEC

String

DATASEC

String

DETSEC

String

CCDSEC

String

TRIMSECA

String

DETSECA

String

CCDSECA

String

AMPSECA

String

DATASECA

String

BIASSECA

String

PRESECA

String

POSTSECA

String

TRIMSECB

String

DETSECB

String

CCDSECB

String

AMPSECB

String

DATASECB

String

BIASSECB

String

PRESECB

String

POSTSECB

String

DETECTOR

String

CCDNUM

Integer

DETPOS

String

EXTNAME

String

GAINA

Double

RDNOISEA

Double

SATURATA

Double

GAINB

Double

RDNOISEB

Double

SATURATB

Double

CRPIX1

Double

CRPIX2

Double

FPA

String

INHERIT

Logical

CCDBIN1

Integer

CCDBIN2

Integer

DHEINF

String

DHEFIRM

String

SLOT00

String

SLOT01

String

SLOT02

String

SLOT03

String

SLOT04

String

SLOT05

String

RADESYS

String

EQUINOX

Double

PV1_7

Double

CUNIT1

String

PV2_8

Double

PV2_9

Double

CD1_1

Double

LTM2_2

Double

LTM2_1

Double

PV2_0

Double

PV2_1

Double

PV2_2

Double

PV2_3

Double

PV2_4

Double

PV2_5

Double

PV2_6

Double

PV2_7

Double

LTM1_1

Double

PV1_6

Double

PV2_10

Double

PV1_4

Double

PV1_3

Double

PV1_2

Double

PV1_1

Double

PV1_0

Double

LTM1_2

Double

PV1_9

Double

PV1_8

Double

CD1_2

Double

PV1_5

Double

CUNIT2

String

CD2_1

Double

CD2_2

Double

LTV2

Double

LTV1

Double

PV1_10

Double

CTYPE2

String

CTYPE1

String

CRVAL1

Double

CRVAL2

Double

VALIDA

Logical

VALIDB

Logical

NDONUTS

Integer

CHECKVER

String

CHECKSUM

String

DATASUM

String

ArrayInfo - format: 16, numberOfDimensions: 2, unit: ADU

WCS - name: Primary, identifier:

Table 6 AxesList

Name

Type

Unit

ProjectionAlgorithm

RA

RA

deg

TPV

DEC

DEC

deg

TPV