[amsat-bb] DSLWP-2 elements for GMAT?

Wed Jun 27 13:13:14 UTC 2018

Thank you Nico,

i will try it again.

73, Apostolos

On Wed, 2018-06-27 at 15:08 +0200, Nico Janssen wrote:
> Apostolos,
> 
> I don't think you are doing anything wrong. Your results look
> correct.
> But I cannot check everything because I am running the most recent
> version of the script with the 29 June orbital elements.
> 
> Sometimes I also get the 'NaN' result in the elevation column. I
> think
> this is a program bug. I found that sometimes it helps to do the
> following: stop GMAT, start GMAT, load the script, immediately run
> the script before doing anything else with the program.
> 
> I hope this helps.
> 
> 73, Nico
> 
> On 27-06-18 13:25, Apostolos Kefalas wrote:
> > On Sun, 2018-06-24 at 09:04 +0200, Nico Janssen wrote:
> > > Ken,
> > > 
> > > You can always find the most recent LongJiang 2 orbital elements
> > > for
> > > GMAT in my GMAT script for LongJiang 2 here:
> > > https://hamsat1.home.xs4all.nl/LongJiang2_NYC.script
> > > 
> > > For further information see my web page:
> > > https://hamsat1.home.xs4all.nl/index.html
> > > 
> > 
> > Hello Nico,
> > 
> > I am trying to use your script for GMAT and learn a little bit of
> > it. I
> > am using GMAT R2018a 64bit for linux.
> > 
> > So far I have added a new "Ground Station" with the exact same
> > "options" of "New_York_City", but with the coordinates of Athens
> > (Lat:38.0246 , Lon:23.8442, Elev:0.230)
> > 
> > Also in the "Event Locators -> ContactLocator->Observers" I have
> > unchecked New_York_City and checked Athens.
> > 
> > I run the Analysis and get the following:
> > 
> > Target: LongJiang2
> > 
> > Observer: Athens
> > Start Time (UTC)            Stop Time (UTC)               Duration
> > (s)
> > 22 Jun 2018 20:00:01.308    22 Jun 2018
> > 23:57:54.270      14272.962042
> > 23 Jun 2018 13:30:48.606    24 Jun 2018
> > 00:31:55.696      39667.090330
> > 24 Jun 2018 14:29:38.778    25 Jun 2018
> > 01:08:24.795      38326.017501
> > 25 Jun 2018 15:29:40.410    26 Jun 2018
> > 01:47:31.343      37070.933417
> > 26 Jun 2018 16:25:59.568    27 Jun 2018
> > 02:18:55.784      35576.216663
> > 27 Jun 2018 17:18:46.946    28 Jun 2018
> > 03:01:47.463      34980.517488
> > 28 Jun 2018 18:07:27.244    29 Jun 2018
> > 03:51:26.879      35039.635199
> > 29 Jun 2018 18:51:47.025    30 Jun 2018
> > 04:46:31.909      35684.884510
> > 30 Jun 2018 19:31:54.199    01 Jul 2018
> > 05:46:51.938      36897.739497
> > 01 Jul 2018 20:08:14.499    02 Jul 2018
> > 06:32:57.414      37482.914687
> > 
> > 
> > Number of events : 10
> > 
> > 
> > According to the above there should be a "pass" over my location on
> > 27
> > Jun 2018 17:18:46.946 until 28 Jun 2018 03:01:47.463 (correct?)
> > 
> > But when I see the ReportFile1 I get:
> > 
> > 
> > ........ (snip)
> > 
> > 27 Jun 2018
> > 17:23:32.914   150.5092511914209                        NaN
> >                            419362.0357962959                       
> >   282
> > 97.22511514511
> > 27 Jun 2018
> > 17:40:29.154   142.0321174249796                        NaN
> >                            418700.9067020232                       
> >   282
> > 97.23687717522
> > 27 Jun 2018
> > 18:00:10.948   133.4730126623195                        NaN
> >                            417834.3036042269                       
> >   282
> > 97.25055535639
> > 27 Jun 2018
> > 18:18:31.981   126.6220879528141                        NaN
> >                            416924.6852335503                       
> >   282
> > 97.26329879122
> > 27 Jun 2018
> > 18:33:21.680   121.7549078882987                        NaN
> >                            416111.3291154901                       
> >   282
> > 97.27359622712
> > 27 Jun 2018
> > 18:48:06.639   117.4075174974269                        NaN
> >                            415226.7124895696                       
> >   282
> > 97.28383881658
> > 27 Jun 2018
> > 19:01:35.422   113.7946111646366                        NaN
> >                            414346.6042086262                       
> >   282
> > 97.29319973242
> > 27 Jun 2018
> > 19:13:46.677   110.7761388040548                        NaN
> >                            413486.9471883456                       
> >   282
> > 97.30166332914
> > 27 Jun 2018
> > 19:24:48.083   108.217464063449                         NaN
> >                            412653.1299510594                       
> >   282
> > 97.3093184835
> > 27 Jun 2018
> > 19:33:38.926   106.2647394891434                        NaN
> >                            411942.9592179462                       
> >   282
> > 97.31546249967
> > 27 Jun 2018
> > 19:41:30.141   104.5965376382924                        NaN
> >                            411280.9274945419                       
> >   282
> > 97.32091637599
> > 27 Jun 2018
> > 19:48:27.000   103.1654945120115                        NaN
> >                            410670.3271268641                       
> >   282
> > 97.3257411411
> > 27 Jun 2018
> > 19:54:38.434   101.9214367116329                        NaN
> >                            410107.171915261                        
> >   282
> > 97.3300401459          	
> > 
> > ........ (snip)
> > 
> > Could please explain what am I doing wrong and I do not have an
> > elevation calculation?
> > 
> > 
> > Thanks in advance
> > Apostolos - SV1LJJ
> > 
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> 
> 