Observational input data for LITTLE_R and/or RAWINS
Input data format for LITTLE_R/RAWINS
Program LITTLE_R expects specifically formatted observational
data
- The data
format is ASCII, and easy to read/create
- Like REGRID,
this allows a user to input his/her own data conveniently
- The
input format to LITTLE_R is described in Chapter 6 of the Tutorial
Notes
- A
good starting point to creating your own input data is the sample
program in the LITTLE_R TAR file (LITTLE_R/util/upa.f)
- We support
two utility programs to obtain/convert input data for LITTLE_R
- fetch-little_r-data.csh
will download ADP format data from NCAR's mass store and convert
this data into LITTLE_R input data
- adp_to_little-r.csh
(inside that latest FETCH
TAR file - after Jan 21, 2004), will only convert ADP data
into LITTLE_R input data
- ADP data
are archived at NCAR/Scientific Computing Division (SCD)/Data
Support Section (DSS) with dataset numbers DS353.4
and DS464.0,
respectively
Program Rawins
- Is
hardwired to take ADP data (described by NCEP Office Notes 29)
for both upperair and surface
- We
support a utility ,fetch-rawins-data.csh, that will download
the ADP format data needed from NCAR's mass store
-
ADP data are archived at NCAR/Scientific Computing Division (SCD)/Data
Support Section (DSS) with dataset numbers DS353.4
and DS464.0,
respectively
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Obtaining observational input
data
- Resent
dataset - available to ALL users
- NCAR/DSS
kindly provides a full year's of surface and upper-air observational
data (in ADP format) to all users
- This
data can be downloaded from the Web directly
-
Surface and Ship data (ds464.0)
- Upper
Air data (ds353.4)
- This
site is updated monthly with new data, while data older than
one year will be removed from time to time
- Once
you have the ADP data on your machine, you can use the script
adp_to_little-r.csh (inside that latest FETCH
TAR file - after Jan 21, 2004) to convert it to LITTLE_R input
format
- If
you run RAWINS, you can use the ADP data directly
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Obtaining observational input data
-
Older datasets
- How
do I get the older ADP observational data?
- You
must either have a NCAR computing account to access the
data for free or order the data from DSS with a fee (see
points 3/4 below for details on how to download data)
- To
find out if you are eligible to apply for a NCAR account,
contact NCAR/SCD.
- To
order data from DSS, please click here.
Before you order data from DSS, you should check the data
inventories (see 2 below) carefully and find out if the
data for the dates you are interested are available
- If
you order the ADP data, use the script adp_to_little-r.csh
(inside that latest FETCH
TAR file - after Jan 21, 2004) to convert this data to LITTLE_R
format
- Where
can I get inventories for ADP observational data?
- Downloading
ADP data for LITTLE_R:
- The
best way to do this is to use fetch-little_r-data.csh
from ~mesouser/MM5V3/Util directory on NCAR's IBM, or
fetch.deck in LITTLE_R/util directory in the program tar
file
- Edit
the script variables that control the dates you want to
download, and run the script. This deck msread data from
MSS, and converts ADP data to that accepted by LITTLE_R
- You
can also download the data manually (see point 4 below)
- If
you download the data manually, you need to use the script
adp_to_little-r.csh (inside that latest
FETCH
TAR file - after Jan 21, 2004) to convert the ADP data
into LITTLE_R format
- Downloading
ADP data for RAWINS:
You can do one of the following:
-
Find the DSS file name from the above MSS-file-list files,
and log on to one of the NCAR computers,
Change directory to the temporary disk (/tmp/$USER or /ptmp/$USER
on the IBM)
msread -fBI upperairdata_9303
/DSS/Y19116
where the DSS file name is for upperair data from Feb 28
to March 19, 1993 from DS353.4, and msread option fBI
must be used to remove Cray data-blocking if you want to
use the data on any workstations and Linux PCs.
After msread, you may ftp the data (using binary transfer
mode) to where you will be using the data.
-
Use fetch-rawins-data.csh from ~mesouser/MM5V3/Util
directory. Edit the script variables that control the date
you want to download. Submit to the Loadleveler, or run
interactively.
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