ISOCAM Interactive Analysis User's Manual Version 5.0 - ISO - ESA

198 CHAPTER 16. DATA STRUCTURE MANIPULATION
16.6.1 Extracting the history
The history information stored in a CIA structure can be accessed using the structure get
routine. As an example, suppose we have an SCD in memory. Let’s assign its name to the
variable scd just for convenience.
CIA> scd = ’CSCDMKN297L6P100_97040515444142’
Now take a look at the history of scd:
CIA> print, scd_get( ’history’,scd )
date=05-Apr-1997 15:44:37 node=ISOW40 user=LMETCALF procedure=x_slicer V II.1
algorithm=user
CIER.FIT;1 ISOW40$DKC100:[IA.LEO.WORK.MKN297] IIPH.FIT;1
ISOW40$DKC100:[IA.LEO.WORK.MKN297] NO COMPACT STATUS HISTORY NO ORBIT
FILE starting record = 1850 ending record = 1963 cia otf
END date=05-Apr-1997 15:44:38 node=ISOW40 user=LMETCALF
procedure=erd2spd V 3.1
algorithm=default CSCDMKN297L6P100_97040515443475 END
The output we get in the above example is in a user-friendly format. Within CIA structures
the history is stored in a coded fashion in the field PROCESS. In the example above the PRO-
CESS was automatically converted into a readable history. In the following example we take a
look at the actual contents of PROCESS:
CIA> process = scd_get( ’process’, scd )
Have a look at process.
CIA> print, process
{ 260639077 ISOW40 LMETCALF x_slicer V II.1 user 0 31 }
{ 260639079 ISOW40 LMETCALF erd2spd V 3.1
default 0 53 }
As you can see from the above it is not in a very user-friendly format. To make it into a
readable history we can use process2history:
CIA> history = process2history( process )
CIA> print, history
etc...
In fact it is this more readable history which can be found in the field .HISTORY in the
PDS. For example:
CIA> print, raster_pds.history
date=28-Sep-1998 14:50:33 node=bermuda user=mdelaney
procedure=darklibrary V 1.1 algorithm=Find best ccglwdark_97031713382678 END