7.2. THE ASCII TABLE EXTENSION

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NAXIS Keyword  The value field shall contain the integer 2, denoting that the included

data array is two-dimensional: rows and columns.

NAXIS1 Keyword  The value field shall contain a non-negative integer, giving the

number of ASCII characters in each row of the table. This includes all the characters

in the defined fields plus any characters that are not included in any field.

NAXIS2 Keyword  The value field shall contain a non-negative integer, giving the

number of rows in the table.

PCOUNT Keyword

The value field shall contain the integer 0.

GCOUNT Keyword

The value field shall contain the integer 1; the data blocks contain

a single table.

TFIELDS Keyword  The value field shall contain a non-negative integer representing

the number of fields in each row. The maximum permissible value is 999.

TBCOLn Keywords  The TBCOLn keywords must be present for all values n = 1, ...,

TFIELDS and for no other values of n. The value field of this indexed keyword shall

contain an integer specifying the column in which field n starts. The first column of a

row is numbered 1.

TFORMn Keywords  The TFORMn keywords must be present for all values n = 1, ...,

TFIELDS and for no other values of n. The value field of this indexed keyword shall

contain a character string describing the format in which field n is encoded. Only the

formats in Table 7.3, interpreted as Fortran [17] input formats and discussed in more

detail in §7.2.5, are permitted for encoding. Format codes must be specified in upper

case. Other format editing codes common to Fortran such as repetition, positional

editing, scaling, and field termination are not permitted. All values in numeric fields

have a number base of ten (i.e., they are decimal); binary, octal, hexadecimal, and

other representations are not permitted. The TDISPn keyword, defined in §7.2.2, may

be used to recommend that a decimal integer value in an ASCII table be displayed as

the equivalent binary, octal, or hexadecimal value.

END Keyword This keyword has no associated value. Bytes 9 through 80 shall contain

ASCII spaces (decimal 32 or hexadecimal 20).

FITS Standard