UMRBPP UND Citation Aircraft Flight Parameters CD-ROM


1.0  General Description


This CD-ROM contains data collected from the University of North Dakota
Citation II Weather Research Aircraft during the Upper Missouri River
Basin Pilot Project (UMRBPP).  The UMRBPP took place in the region around
the Black Hills of South Dakota and Wyoming during April 1999.  Data are
available for the eight flights the Citation undertook during this period.
Two types of data are included on this CD: A high rate data set (25 Hz)
that includes a limited set of parameters (largely aircraft parameters and
state parameters) and a low rate data set (4 Hz) that includes the full
suite of parameters (those of the 25 Hz as well as many microphysical
parameters).  Many other datasets were collected during the UMRBPP and
these can be obtained from the University Corporation for Atmospheric
Science/Joint Office for Science Support (UCAR/JOSS) via the World Wide Web
at: http://www.joss.ucar.edu/umrbpp .


2.0  CD-ROM Structure


This CD contains four subdirectories (i.e. 25Hz, 4Hz, convert, and idl).
Information on the contents of these subdirectories follows.


2.1  25Hz


This subdirectory contains the high rate (25 Hz) data from the UND Citation
aircraft.  There is one data file per flight.  The data files have the
following naming convention:

cmmddyy.25h

where mm is the month, dd is the day, and yy is the year.  In the case of
15 April 1999 there were two separate flights undertaken and these are
signified by the "a" and "b" following the year.

Also contained in this directory is the file "Readme25.rap" which contains
a description of the binary format of the data as well as a parameter
listing.


2.2  4Hz


This subdirectory contains the low rate (4 Hz) data from the UND Citation
aircraft.  There is one data file per flight.  The data files have the
following naming convention:

cmmddyy.4hz

where mm is the month, dd is the day, and yy is the year.  In the case of
15 April 1999 there were two separate flights undertaken and these are
signified by the "a" and "b" following the year.

Also contained in this directory is the file "Readmet4.rap" which contains
a description of the binary format of the data as well as a parameter
listing.


2.3  convert


This subdirectory contains two programs to convert the binary data format
into a columnar ASCII data format.  Both programs are C++ so a C++ compiler
is needed (e.g. gcc) to compile and utilize them.  These programs were
developed and supplied by Fred Kopp of the South Dakota School of Mines and
Technology.

The program Cit25.c converts the high rate (25 Hz) data set and the program
Cit4.c converts the low rate (4 Hz) data set.  Both programs work in the
same manner, the user needs to determine which parameters they want output
into the columnar ASCII format and make changes to the appropriate segments
of the program.  You will need to utilize the data order numbers within the
README files to print out the appropriate parameters.


2.4  idl


This subdirectory contains a zipped file (you will need the unzip or gunzip
utility to inflate the file) that contains an IDL (Interactive Data Language) 
program that allows the plotting and printing of single variables.  You must 
have IDL available to you for these to be used.  This program was developed 
by Rand Feind and provided by Fred Kopp both of the South Dakota School of 
Mines and Technology.

The driving program is plot.pro and it utilizes some of the other programs
within this subdirectory.  For this program to work properly on your local
system you will need to change the dir path to the data (the READMEs
specific to each type of data will also need to be in the same directory as
the data).  This program has worked on both SGI and Sun Solaris, your
mileage may vary.


3.0  Data Contact


Mike Poellot
University of North Dakota
Department of Atmospheric Sciences
Box 9006, University Station
Grand Forks, ND, 58202-9006

email = poellot@aero.und.edu
vox = (701) 777-2184
fax = (701) 777-2940