File index

The Entry Indexes, gathered into Extension Indexes, are ruled by the Classic Data Container specifications. According to these, the index contents are let free to Class. They are described below for files version 1 and 2.

Table: Index version 1 (found in files version 1). Note that index length is 32 words (so that 4 of them fit in a 128 words record), even if 10 words are left unused.

Position	Parameter	Fortran Kind	Unit	Purpose
1	bloc	Integer*4	Record	Record where observation is to be found
2	num	Integer*4		Observation number
3	ver	Integer*4		Observation version
4-6	csour	Character*12		Source name
7-9	cline	Character*12		Line name
10-12	ctele	Character*12		Telescope name
13	dobs	Integer*4	GAG date	Observation date
14	dred	Integer*4	GAG date	Reduction date
15	off1	Real*4	Radian	Lambda offset
16	off2	Real*4	Radian	Beta offset
17	type	Integer*4	Code	Coordinate system
18	kind	Integer*4	Code	Kind of data
19	qual	Integer*4	Code	Quality of data
20	scan	Integer*4		Scan number
21	posa	Real*4	Radian	Position angle (drifts)
22	subscan	Integer*4		Subscan number
23-32	(unused)			Padding to 32 words

Table: Index version 2 (found in files version 2)

Position	Parameter	Fortran Kind	Unit	Purpose
1-2	bloc	Integer*8	Record	Record where observation is to be found
3	word	Integer*4	Word	Word where the obs. starts in this record
4-5	num	Integer*8		Observation number
6	ver	Integer*4		Observation version
7-9	csour	Character*12		Source name
10-12	cline	Character*12		Line name
13-15	ctele	Character*12		Telescope name
16	dobs	Integer*4	GAG date	Observation date
17	dred	Integer*4	GAG date	Reduction date
18	off1	Real*4	Radian	Lambda offset
19	off2	Real*4	Radian	Beta offset
20	type	Integer*4	Code	Coordinate system
21	kind	Integer*4	Code	Kind of data
22	qual	Integer*4	Code	Quality of data
23	posa	Real*4	Radian	Position angle (drifts)
24-25	scan	Integer*8		Scan number
26	subscan	Integer*4		Subscan number