1. CATALOG.DOC contains a list of the principal investigators,
their instruments, measurements, and their addresses. 
Tables showing the available aircraft data and
appropriate file name prefix's are also given.

2.HALLEY.DOC contains additional information about the ozonesondes launched at
Halley Bay, Antarctica.

3.FORMAT.DOC gives the format specifications which all experimenters were
encouraged to use when writing time series data files for data exchange.
The standard format includes header information which describes the data,
and the data in the form of time series.  Some of the measurements
(ie. balloon and lidar soundings, and those with nonuniform sampling
intervals) are not easily cast as time series with constant sampling
intervals so some of the data files have unique formats.
But most of the ER-2 data files and some of the DC-8 files follow
this standard format (with the exception that we have changed the file
name extensions from A1 to ER2 or DC8).  
At least, this document may serve as a guide for reading the data files.

4.SOFTWARE.DOC contains documentation on Fortran subroutines
included in the SOFTWARE directory which can be used to read
those files which are in the standard format described in FORMAT.DOC.