[Dart-dev] svn:mime-type/ Revision: 11930
dart at ucar.edu
dart at ucar.edu
Fri Sep 8 09:49:09 MDT 2017
thoar at ucar.edu
2017-09-08 09:49:07 -0600 (Fri, 08 Sep 2017)
This data file was created by I-Te Lee:
"First of all, the original idea error of ionospheric observation is 1%. Thus, I put
the code as "oerr = 0.01_r8 * obsval". Liu et. al and Yue et al investigated the Abel
inversion error of COSMIC ionosphere profile, both of them figure out the large error
would appear at the lower altitude and push model toward wrong direction at the lower
ionosphere while assimilating these profiles.
On the other hand, the Abel inversion error is depended on the ionospheric electron
density structure, which function of local time, altitude and geomagnetic latitude.
Therefore, to simplify the procedure to define observation error of profiles,
Xinan Yue help me to estimated a error matrix and saved in the file which named 'f3coerr.dat'.
The file included a 15 by 37 by 25 (altitude - latitude - local time) matrix,
ranging from 100-800 km within 50 km interval, -90 to 90 degree in geomagnetic
latitude within 5 degree interval, and 0 to 24 local hr with 1 hr interval.
The number in the matrix is error percentage (%), which calculated by OSSE.
Please check the attached files for that two reference papers .
In the end, the observation error is summed up of instrumentation error (10%) and Abel error."
I converted the file to netCDF, the references are included as global metadata.
(Binary files differ)
--- DART/branches/rma_trunk/observations/obs_converters/gps/f3coerr.nc 2017-09-05 21:16:25 UTC (rev 11929)
+++ DART/branches/rma_trunk/observations/obs_converters/gps/f3coerr.nc 2017-09-08 15:49:07 UTC (rev 11930)
Property changes on: DART/branches/rma_trunk/observations/obs_converters/gps/f3coerr.nc
## -0,0 +1 ##
\ No newline at end of property
More information about the Dart-dev