>I have been told me that you have a program that converts soundings in FSL
>format to GEMPAK format.  We are working with the CD-ROMs of the North
>American radiosonde data (obtained from NCDC) and want to do some
>isentropic analyses using GEMPAK.  We need to be able to rewrite the data
>from the ROM in a GEMPAK-readable format.  Do you have such a program and,
>if so, would you be willing to share it?  Or just some tips on how to get
>the data in the correct form would be appreciated.  Thank you for
>considering this request!

That is correct - I do have a program that will convert the FSL/KC (NSSFC)
data to GEMPAK format.  I no longer use it because I discovered a better and
easier way to do this.  Because of the way that my program converts the
data, not all levels have winds (i.e., the TTBB data are windless).
Conversion of the pressure coordinate data to isentropic coordinates then
results in many levels not having winds because interpolation was not
possible.  Using the GEMPAK routines results in better data tranformation
because their code is more robust.  The steps follow:

1.  Retrieve the data from the CD-ROM in FAA604/SHARP format.

2.  Be certain to save all the soundings for a time/day/etc. in a single
    file.  (Normally, SHARP wants every sounding in a separate file.)

3.  Using GEMPAK, create an empty sounding file using "sncfil".  Be
    certain to set the parameter MRGDAT=NO.

4.  Convert the SHARP format files to GEMPAK format using "snrawd".

Good luck.

Note added: snrawd has been retired from GEMPAK. Use dcuair to convert
the upper air data into a GEMPAK file.