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The IHAP header contains the description of the data in a fixed,
binary format. With reference to the IHAP manual, the translation of
this information into MIDAS descriptors are given in
Table 7.2.1. IHAP defines the end of exposure which is
converted to exposure time. Also, start and end are given for image
axes instead of start and number of pixels
Table 7.5:
Name translation between IHAP header and
MIDAS descriptors. Asterisk indicates that the value is
transformed (see text).
IHAP header |
MIDAS descriptor |
IHAP header |
MIDAS descriptor |
DRASC |
O_POS(1) |
JUSR1 |
IHAPUSER(1) |
DECLN |
O_POS(2) |
JUSR2 |
IHAPUSER(2) |
JYEAR/JDAT |
O_TIME(1) |
DUSR1 |
IHAPUSER(3) |
DCRAT |
O_TIME(5) |
DUSR2 |
IHAPUSER(4) |
DSTTM |
O_TIME(6) |
AHGC |
LHCUTS(2) |
DENTM |
O_TIME(7)* |
ALWC |
LHCUTS(1) |
JDENT |
IDENT |
DAIRM |
O_AIRM |
DXSTR/DYSTR |
START |
|
|
DXSTP/DYSTP |
STEP |
|
|
DXEND/DYEND |
NPIX* |
|
|
In addition to the main header, keywords and comments may exist. They
are saved in the descriptor O_COM in ASCII format.
Next: Restrictions
Up: IHAP Format
Previous: IHAP Format
Petra Nass
3/23/1999