ASCII output can be produced for any bolometer using the ndf2ascii command which is part of the Starlink package, Convert. Note that if you intend to compare the bolometer signals then the flatfielded or extinction corrected data must be used. Here’s observation #52 of 8C1435+635 again,
The output file h7_52 contains a single column of numbers each corresponding to 2 seconds of
integration time (corrected for the beam-switching). The input NDF, red52_ext(19„2) is thus the output
of extinction but using a section to select the central pixel of the long-wave array, i.e. bolometer 19.
The ‘2’ just selects the central beam position. Similarly the sky bolometer, h14, is referred to as
red52(26„2). Further information on the data structure can be found in the Surf documentation
(SUN/216).