nudging BUFR格式转little_r格式

vicky-zz

Source of Observations

OBSGRID reads observations provided by the user in formatted ASCII text files. This allows users to adapt their own data to use as input to the OBSGRID program. This format (wrf_obs / little_r format) is the same format used in the MM5 objective analysis program LITTLE_R (hence the name).

Programs are available to convert NMC ON29 and NCEP BUFR formatted files (see below) into the wrf_obs / little_r format. Users are responsible for converting other observations they may want to provide to OBSGRID into this format. A user-contributed (i.e., unsupported) program is available in the utils/ directory for converting observation files from the GTS to wrf_obs / little_r format.

NCEP operational global surface and upper-air observation subsets, as archived by the Data Support Section (DSS) at NCAR.

• Upper-air data in NMC ON29 format (from early 1970s to early 2000) http://rda.ucar.edu/datasets/ds353.4/
• Surface data in NMC ON29 format (from early 1970s to early 2000) http://rda.ucar.edu/datasets/ds464.0/
• Upper-air data in NCEP BUFR format (from 1999 to present) http://rda.ucar.edu/datasets/ds351.0/
• Surface data in NCEP BUFR format (from 1999 to present)  http://rda.ucar.edu/datasets/ds461.0/
  

The newer data (ds351.0 and ds461.0) is also available in the little_r format. From outside NCAR, this data can be download from the web, while it is available on the NCAR /glade system for NCAR supercomputer users. This data is sorted into 6-hourly windows, which are typically too large for use in OBSGRID. To reorder this into 3-hourly windows:

·     Get the little_r 6-hourly data

o   Non-NCAR super-computer users. Get the data directly from the above web sites. Combine (by using the Unix ‘cat’ command) all the surface and upper-air data into one large file called rda_obs.

o   NCAR super-computer users. Use the script util/get_rda_data.csh, to get the data and create the file rda_obs. You will need to edit this script to supply the date range that you are interested in.

·     Compile the Fortran program util/get_rda_data.f. Place rda_obs file the in the top OBSGRID directory. Run the util/get_rda_data.exe executable. This executable will use the date range from namelist.oa, and create 3-hourly OBS:<date> files which are ready to use in OBSGRID.

ds351.0 and ds461.0里面无法下载（自动回复：请不要使用迅雷等下载工具，点我查看下载帮助）（自动回复：请不要使用迅雷等下载工具，点我查看下载帮助）little_r格式的数据哎（难道应该不是超级用户？），目前只在这两个网址里面下了bufr格式的。有木有大神提示一下，这个格式怎么转little_r格式。我看手册上说OBSGRID里面提供了bufr格式转little_r格式的程序，但是我不知道是哪个！！！，有没有好心人帮我解答一下，万分感谢

kazami2003

https://github.com/NCAR/rda-bufr-decode-ADPupa
https://github.com/NCAR/rda-bufr-decode-ADPsfc

自己看一下