[ET Trac] [Einstein Toolkit] #551: Output metadata from TwoPunctures

[Einstein Toolkit]

#551: Output metadata from TwoPunctures
-----------------------------------+----------------------------------------
 Reporter:  hinder                 |       Owner:     
     Type:  enhancement            |      Status:  new
 Priority:  minor                  |   Milestone:     
Component:  EinsteinToolkit thorn  |     Version:     
 Keywords:  TwoPunctures           |  
-----------------------------------+----------------------------------------
 It is desirable to be able to determine the properties of !TwoPunctures
 initial data from the simulation output.  Currently, some quantities
 (initial momenta etc.) can be determined by parsing the parameter file and
 param.ccl, and others by parsing the standard output of the run (ADM
 mass).  Neither of these are optimal.

 The attached patch causes !TwoPunctures to output a metadata file in the
 form described in [http://arxiv.org/abs/0709.0093 Data formats for
 numerical relativity waves].  The keys used include current draft
 proposals used in the NR-AR project.

 To encourage the use of this, I have made the output happen
 unconditionally.

 The output filename is !TwoPunctures.bbh and it is written into
 IO::out_dir.  The metadata file looks like this:

 {{{
 # ==================================
 # Numerical Relativity Metadata file
 # ==================================
 #
 # This file contains information about the simulation provided by the
 # TwoPunctures thorn.  The format is described in the NR Data Format
 Document
 # http://arxiv.org/abs/0709.0093 [draft SVN r707].

 [metadata]
 initial-ADM-energy            = 1.190594340667362472
 initial-ADM-angular-momentumx = 0.1100000000000000006
 initial-ADM-angular-momentumy = 0.2200000000000000011
 initial-ADM-angular-momentumz = 1.195856641772157003
 initial-separation            = 7
 initial-data-type             = Bowen-York
 initial-data-bibtex-keys      = Bowen:1980yu Brandt:1997tf Ansorg:2004ds
 initial-bh-position1x         = 3.5
 initial-bh-position1y         = 0
 initial-bh-position1z         = 0
 initial-bh-position2x         = -3.5
 initial-bh-position2y         = 0
 initial-bh-position2z         = 0
 initial-bh-momentum1x         = -0.003358311330506950042
 initial-bh-momentum1y         = 0.1236938059674509982
 initial-bh-momentum1z         = 0
 initial-bh-momentum2x         = 0.003358311330506950042
 initial-bh-momentum2y         = -0.1236938059674509982
 initial-bh-momentum2z         = 0
 initial-bh-spin1x             = 0.1000000000000000056
 initial-bh-spin1y             = 0.2000000000000000111
 initial-bh-spin1z             = 0.2999999999999999889
 initial-bh-spin2x             = 0.01000000000000000021
 initial-bh-spin2y             = 0.02000000000000000042
 initial-bh-spin2z             = 0.02999999999999999889
 initial-bh-puncture-adm-mass1 = 0.7117197159189734279
 initial-bh-puncture-adm-mass2 = 0.5107035566228820267
 }}}

-- 
Ticket URL: <https://trac.einsteintoolkit.org/ticket/551>
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