Table 1: MAIN table: Data, coordinates and flags
MAIN table: Data, coordinates and flags

Name

Format

Units

Measure

Comments

Columns

Keywords

EDF_VERSION

Float

EDF format version

Key

TIME

Double

s

EPOCH

Integration midpoint

(TIME_EXTRA_PREC) 

Double

s

extra TIME precision

CONFIG_DESCRIPTION_ID

Int

Config. description id.

FIELD_ID

Int

Field id.

Non-key attributes

INTERVAL

Double

s

Sampling interval

INTEG_NUMBER

Int

Integration number

EXECUTE_ID

Int

Execute id.

STATE_ID

Int

State id.

MAIN table: continued

Name

Format

Units

Measure

Comments

Data

EXPOSURE

Double(Nbb)

s

Effective integration tiome

TIME_CENTROID

Double(Nbb)

s

EPOCH

Time centroid

DATA_OID

String

Reference to the data object

Flag information

FLAG

Float
(form of DATA_OBJECT)

Cumulative data flags

FLAG_CATEGORY

Float
(form of DATA_OBJECT,Ncat)

Flag categories

FLAG_ROW

Bool

The row flag

Notes: Nbb = number of basebands (attribute of the CONFIG_DESCRIPTION  table), The form of the data object is determined by the attributes in the Data description section of the CONFIG_DESCRIPTION  table and Nc = the numbers of correlators, Nf = the numbers of frequency channels and Nphc all those derived via the identifiers in the DATA_DESCRIPTION_ARRAY collection. Ncat = is number of flag categories.
EDF_VERSION
EDF revision number, expressed as major_revision.minor_revision. A string containing NONE1  reflect no sort order.
TIME
Mid-point (not centroid) of data interval.
TIME_EXTRA_PREC
Extra time precision
CONFIG_DESCRIPTION_ID
Configuration descriptor identifier (> 0) providing a direct index into the CONFIG_DESCRIPTION sub-table row number. Note that two or more sub-arrays cannot refer to the same CONFIG_DESCRIPTION_ID identifier.
FIELD_ID
Field identifier (> 0)
INTERVAL
Data sampling interval. This is the nominal data interval, it does not include the effects of bad data or partial integration.
INTEG_NUMBER
INTEGRATION number. The enumeration is relative to the OBSERVATION (ALMA glossary). The enumeration of the observations is implicit; each time INTEG_NUMBER is decrementing from one row to the next in this DRAFT_MAIN  table the OBSERVATION number is implicitly incremented. N.B.: the OBSERVATION intent is in the STATE  sub-table.
EXECUTE_ID
This provides access to a row number in the EXECUTE_SUMMARY  table. This meta coordinate defines the data-base in term of an implicit collection of data blocks.
STATE_ID
State identifier (> 0). Would be always 0 if the sub-integration are not considered.
EXPOSURE
Effective duration of an INTEGRATION (or a SUB_INTEGRATION if STATE_ID is > 0).
TIME_CENTROID
Time stamp reflecting the average time the non-blanked data was integrated.
DATA_OID
Reference to the data cell object. It is an object identifier and, as such, is of type String.
FLAG
An array of Boolean values with the same shape2 array as the DATA_OBJECT representing the cumulative flags applying to this data matrix, as specified in FLAG_CATEGORY . Data are flagged bad if the FLAG  array element is True.
FLAG_CATEGORY
An array of flag matrices with the same shape as the DATA_OBJECT, but indexed by category. The category identifiers are specified by a keyword CATEGORY , containing an array of string identifiers, attached to the FLAG_CATEGORY  column and thus shared by all rows in the MS. The cumulative effect of these flags is reflected in column FLAG . Data are flagged bad if the FLAG  array element is True.
FLAG_ROW
True if the entire row is flagged.

Remarks:

The attribute SUBARRAY_NUM is removed, the CONFIG_DESCRIPTION_ID attribute reflecting a sub-array. With CONFIG_DESCRIPTION_ID as a key this table can have rows for different arrays, even if their are not synchronized in time. The EXECUTE_SUMMARY  table contains an ANTENNA_IDSET attribute which represents a collection which should correspond to the union of the ANTENNA_ARRAY collections.
N.B. In case of a multi-configuration data sets, note that CONFIG_NAME is added in the EXECUTE_SUMMARY  table; in that context it is possible to distinguish the case of several sub-arrays and the case of several array configurations.