Data

IBFV1.11 INTERMAGNET Baseline Format

This format is to be used to provide samples of baselines for use in examining equipment performance and for inclusion on the INTERMAGNET CD-ROM/DVD. The first section contains the observed baseline values on those days on which they were measured. Consequently the number of entries will depend upon the schedule for absolute measurements at that observatory. The second section contains adopted baseline values representing each day of the year. A comment section is also provided.


COMP_HHHHH_IDC_YEARCrLf

DDD_AAAAAAA_BBBBBBB_ZZZZZZZ CrLf.

 	.	.	.	.	.

 	.	.	.	.	.

 	.	.	.	.	.

DDD_AAAAAAA_BBBBBBB_ZZZZZZZ CrLf.

*

001_AAAAAAA_BBBBBBB_ZZZZZZZ_FFFFF CrLf.

002_AAAAAAA_BBBBBBB_ZZZZZZZ_FFFFF CrLf.

003_AAAAAAA_BBBBBBB_ZZZZZZZ_FFFFF CrLf.

	.

	.

	.

366_AAAAAAA_BBBBBBB_ZZZZZZZ_FFFFF CrLf.

*

Component values are coded as signed integers, right-justified with a field width of 7. Total field (Delta F) values are coded as signed integers, right-justified with a field width of 5. The field widths must be maintained, either through zero-filling or space-filling. The '+' sign for positive values is optional.

COMP	:	Order of components HDZF, XYZF
HHHHHH:	:	Annual mean value of H component in nT.
IDC	:	IAGA three-letter observatory ID code eg: BOU for Boulder, OTT for Ottawa, LER for Lerwick, etc.
YEAR	:	4-digit Year: for example, 1991.
DDD	:	Day of the year
AAAAAAA	:	Signed value of H or X in 0.1 nT
BBBBBBB	:	Signed value of D or Y in 0.1 nT or 0.1 min of arc.
ZZZZZZZ	:	Signed value of Z in 0.1 nT
FFFFF	:	Signed value of Delta F, the difference between calculated and observed value of F (by a proton magnetometer) in 0.1 nT
*	:	Section separator.
_	:	Indicates a space character.
CrLf	:	Indicates a Carriage return, Line feed.

Missing values must be replaced by 999999 for D, H, X, Y, Z and by 9999 for F.

File name convention is IAGYR.BLV where IAG = 3-letter observatory IAGA code and YR = 2-digit year.