Preliminaries

The data is not in the work directory so DATADIR should be set:

% setenv DATADIR /scuba/observe/apr8/dem

assuming a C-shell type environment. I can now make a log of a subset of the nights data to find out which observations should be processed:

% sculog -summary --begin=54 --end=63
-Log for directory: /home/timj/scuba/maps/sun216
                    /scuba/observe/apr8/dem
 
 #    HST    Obsmode   Source   Meas/Int Airmass  Filter  Bolometers
---- -----   --------- -------  -------- ------- -------- ----------
54   23:02   SKYDIP    SKY        10/20          450N:850 SHORT_DC,LONG_DC
55   23:13   POINTING  3c279       1/2   1.14464 450N:850 LONG
56   23:17   PHOTOM    3c279       1/10  1.13858 450N:850 H7
57   23:22   PHOTOM    3c279       1/10  1.13217 450N:850 H7
58   23:28   PHOTOM    3c279       1/10  1.12641 450N:850 H7
59   23:35   MAP       3c279       1/3   1.12019 450N:850 SHORT,LONG
60   23:44   MAP       3c279       1/3   1.11481 450N:850 SHORT,LONG
61   23:53   MAP       3c279       1/3   1.11101 450N:850 SHORT,LONG
62   00:02   MAP       3c279       1/3   1.10965 450N:850 SHORT,LONG
63   00:03   POINTING  3c273       1/4   1.05483 450N:850 SHORT
 :                                  :                :
 :                                  :                :
98   03:18   SKYDIP    SKY        10/20          450N:850 SHORT_DC,LONG_DC

In order to save time typing in the filename every time we wish to access demodulated data, we also set the SCUBA_PREFIX environment variable:

% setenv SCUBA_PREFIX apr8

This variable allows demodulated data to be referenced by observation number. It is also possible to set the style for the default output filename provided by the individual tasks. In this example, we will use the default convention ('LONG'). More information on the SURF environment variables can be found in §.