[CIG-MC] ask about the geoid output of CitcomS

[Thorsten Becker]

here's one of my scripts to plot the geoid and do a bunch more stuff, it
uses tools from shansyn <https://github.com/thwbecker/shansyn> but the
point is that the geoid format of citcom is straightforward and reading the
manual and source should give you all the info needed for the conversion,
else see what i do using the abconvert program of shansyn.

there are a number of ways to read in tomography models for circulation
computations, i use the ggrd extension, which can read in GMT/Netcdf grid
files, see the source code for how to do so, there are comments, but i
don't think this is documented in the manual yet.

Thorsten Becker - UTIG & DGS, JSG, UT Austin
<http://www-udc.ig.utexas.edu/external/becker/>

On Wed, May 3, 2017 at 7:51 PM, 崔荣花 <rhcui at asch.whigg.ac.cn> wrote:

>
> Hi,
> Thanks for the quick reply, first of all. I want to make out  whether the
> third and fourth columns in the geoid output file, which mean cosine and
> sine coefs of total geoid respectively, include the contribution of CMB
> topography.
> Also, I want to ask that if the density anomaly models, such as those
> transformed from seismic tomography could be inputted to the CitcomS, and
> how to do that?
> Thanks.
>
> Best regards,
> Cui Ronghua
>
>
> -----原始邮件-----
> *发件人:* "Shijie Zhong" <shijie.zhong at colorado.edu>
> *发送时间:* 2017年5月4日 星期四
> *收件人:* "cig-mc at geodynamics.org" <cig-mc at geodynamics.org>
> *抄送:*
> *主题:* Re: [CIG-MC] ask about the geoid output of CitcomS
>
>
> Hi Ronghua,
>
> CMB topography is computed and output on the finite element grid, but may
> not be expanded in terms of spherical harmonics in the same form as surface
> topography in the geoid file. If you need CMB topography in terms of
> spherical harmonics, you may need to modify the code yourself.
>
>
> Shijie Zhong, Professor
> Department of Physics
> University of Colorado at Boulder
> Boulder, CO 80309
> http://mathis.colorado.edu/szhong
> Tel: 303-735-5095 <(303)%20735-5095>; Fax: 303-492-7935 <(303)%20492-7935>
>
>
> From: CIG-MC on behalf of 崔荣花
> Reply-To: "cig-mc at geodynamics.org"
> Date: Wednesday, May 3, 2017 at 8:10 AM
> To: "cig-mc at geodynamics.org"
> Subject: [CIG-MC] ask about the geoid output of CitcomS
>
>
> Hi all,
>
> I have a problem about the geoid output of CitcomS. From the mannual, I
> knew the meaning of the columns in the ascii geoid file. There are eight
> columns in the geoid file, including columns of spherical harmonic
> degrees(l),order(m), cosine term of total geoid(Slm), sine term of total
> geoid(Clm), cosine term duing to surface topo,sine term duing to surface
> topo, cosine term duing to internal density variation and sine term duing
> to internal density variation. But, I found that there weren't cosine and
> sine terms for the CMB topo. Could anyone explain this to me, please?
> Thanks a lot.
>
>
> Best regards,
> Cui Ronghua
>
>
>
>
>
>
>
>
>
> _______________________________________________
> CIG-MC mailing list
> CIG-MC at geodynamics.org
> http://lists.geodynamics.org/cgi-bin/mailman/listinfo/cig-mc
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