Changes between Initial version and Version 1 of Ticket #228


Ignore:
Timestamp:
2011-05-17T10:55:03Z (14 years ago)
Author:
Ian Culverwell
Comment:

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  • Ticket #228

    • Property Component ROPP (all) → Preproc
    • Property Keywords MSIS added
    • Property Resolution → fixed
    • Property Status new → closed

  • Ticket #228 – Description

    initial v1  
    1 Kjartan Kinch (DMI) discovered that these coefficients are being held at different precision in OCC (8 decimal places, from ascii file) and ROPP (read in from ascii file as single precision, then promoted to double precision before being written out to netCDF file). 
     1Kjartan Kinch (DMI) discovered that these coefficients are being held at different precision in OCC (8 decimal places, from ascii file) and ROPP (read in from ascii file as single precision, then promoted to double precision before being written out as DP vars to netCDF file). 
    22
    3 By reading them in as DP in ropp_pp/msis_bangle/MSIS_ascii2netcdf.pro we obtain a netcdf file at equivalent precision.
     3By reading them in as DP variables in ropp_pp/msis_bangle/MSIS_ascii2netcdf.pro we obtain a netcdf file at equivalent precision. For example:
    44
    5 ba_Ac0(1, 1, 1) from ropp_pp/data/dabcs01.asc:
     5ba_Ac0(1, 1, 1) from '''ascii''' ropp_pp/data/dabcs01.asc =
    66  0.32796969E+02
    77
    8 ba_Ac0(1, 1, 1) from '''original''' ropp_pp/data/MSIS_coeff.nc:
     8ba_Ac0(1, 1, 1) from '''original''' ropp_pp/data/MSIS_coeff.nc =
    99   3.27969703674316406250e+01
    1010
    11 ba_Ac0(1, 1, 1) from '''final''' ropp_pp/data/MSIS_coeff.nc:
    12     3.27969689999999971519e+01
     11ba_Ac0(1, 1, 1) from '''revised''' ropp_pp/data/MSIS_coeff.nc =
     12   3.27969689999999971519e+01
    1313
     14Unfortunately, it doesn't fix the original problem, but at least it's one less known difference between OCC and ROPP. 
     15
     16This change will be introduced at ROPP5.0.