Hi Natalia,

Since you mentioned using classroom exercise #2 from the release package and 
Patrick suggesting to switch to the current development version instead, I'd 
like to point out that the exercises are not part of the ARTS package anymore. 
But you can find a separate arts-lectures package with up to date controlfiles 
in our SVN repository:

svn co https://arts.mi.uni-hamburg.de/svn/rt/arts-lectures/trunk arts-lectures

Cheers,
Oliver


> On 7 Mar 2019, at 20:21, Patrick Eriksson <patrick.eriks...@chalmers.se> 
> wrote:
> 
> Dear Natalia,
> 
> Try this:
> 
> VectorCreate( trv )
> NumericCreate( wind_speed )
> NumericCreate( wind_dir )
> 
> AgendaSet( iy_surface_agenda ){
>  SurfaceDummy
>  specular_losCalc
>  ppathCalc( rte_pos=rtp_pos, rte_los=specular_los )
>  ArrayOfStringSet( iy_aux_vars, ["Optical depth"] )
>  iyEmissionStandard
>  transmittanceFromIy_aux( transmittance=trv )
>  surfaceFastem( wind_speed=wind_speed, wind_direction=wind_dir, 
> transmittance=trv )
>  iySurfaceRtpropCalc
> }
> 
> This should work. I have not actually made a test run (due to lack of time) 
> but hopefully I have not missed any detail. (If you use this, you can ignore 
> surface_rtprop_agenda).
> 
> FASTEM does not fit into the pattern of ARTS, as it wants the transmission as 
> input. This makes the agenda definition a bit messy.
> 
> FASTEM 6 is default.
> 
> My suggestion uses the default for salinity, adopt if you want to use another 
> value.
> 
> You need a quite recent version of ARTS 2.3 for this. I added the method 
> transmittanceFromIy_aux not a long time ago.
> 
> Bye,
> 
> Patrick
> 
> 
> 
> On 2019-03-07 19:22, Bliankinshtein, Natalia wrote:
>> Dear Patrick,
>> Thanks for your prompt reply! I would like to use FASTEM in a simple 1D 
>> forward model configuration, so no retrievals of surface properties will be 
>> needed. I am particularly interested in FASTEM6 - not sure how its versions 
>> align with those of ARTS. Also, I think a simple prescribing of surface 
>> wind, temperature and salinity as Numerics would be sufficient for my 
>> purposes.
>> I have started building my controlfile upon the classroom exercise #2 
>> (rtcalc)  included in the release package, so if you could show me how to 
>> include FASTEM into that example, that would be just great.
>> Please let me know if you need more info about the planned usage to give me 
>> a hint on this.
>> Thank you for your help,
>> Natalia
>> Natalia Bliankinshtein
>> Research Council Officer/Agent du Conseil de recherches
>> NRC Aerospace/CNRC AĆ©rospatiale
>> National Research Council Canada/Conceil National de recherches Canada
>> 1200 Montreal Rd, Ottawa (Ontario)  K1A 0R6
>> Bldg/Edifice U-61 | Rm/Ch. 233A
>> 1920 Research Private
>> Tel.: (613) 998-5349 | Cellphone: (343) 549-4262
>> natalia.bliankinsht...@nrc-cnrc.gc.ca
>> ________________________________________
>> From: Patrick Eriksson <patrick.eriks...@chalmers.se>
>> Sent: March 7, 2019 2:43 AM
>> To: Bliankinshtein, Natalia; arts_users.mi@lists.uni-hamburg.de
>> Subject: Re: [arts-users] FASTEM in ARTS
>> Dear Natalia,
>> Yes, FASTEM is at hand, but it is a bit tricky to give a general answer.
>> It depends on e.g.
>> * Do you want to retrieve any surface properties?
>> * Do you want to set specific wind speeds etc, or do you want to obtain
>> wind speed etc. by interpolation from some data?
>> Can you give us some more information?
>> Bye,
>> Patrick
>> On 2019-03-06 20:51, Bliankinshtein, Natalia wrote:
>>> Dear ARTS users and developers,
>>> 
>>> 
>>> I have recently started learning ARTS and appreciate its extreme
>>> flexibility.
>>> 
>>> According to the documentation, ARTS does not include an option of using
>>> FASTEM6 water surface model, however I see some evidence people have
>>> used it, for example here in Mr. Oliver Lemke's repository
>>> https://github.com/olemke/arts/tree/master/3rdparty/fastem and in Mr.
>>> Stuart Fox's email to the list in November 2018.
>>> 
>>> 
>>> I am struggling though to come up with a controlfile that would call
>>> FASTEM6. So I am kindly asking if anyone could please share a minimum
>>> working example of how to do that?
>>> 
>>> 
>>> Also, a workaround that could work for my purposes would be reading
>>> surface reflectivities from a file, which I tried. It seems to me,
>>> however, that surface emissivities are always computed as
>>> (1-reflectivity), which is not the case for FASTEM. Thus my question: is
>>> it possible to override surface emissivity and to read it from a file
>>> instead?
>>> 
>>> 
>>> Looking forward to hear your valuable advice.
>>> 
>>> 
>>> Best regards,
>>> 
>>> Natalia
>>> 
>>> 
>>> 
>>> *Natalia Bliankinshtein*
>>> 
>>> Research Council Officer/Agent du Conseil de recherches
>>> NRC Aerospace/CNRC AĆ©rospatiale
>>> National Research Council Canada/Conceil National de recherches Canada
>>> 1200 Montreal Rd, Ottawa (Ontario)  K1A 0R6
>>> Bldg/Edifice U-61 | Rm/Ch. 233A
>>> 1920 Research Private
>>> Tel.: (613) 998-5349 | Cellphone: (343) 549-4262
>>> natalia.bliankinsht...@nrc-cnrc.gc.ca
>>> 
>>> 
>>> 
>>> _______________________________________________
>>> arts_users.mi mailing list
>>> arts_users.mi@lists.uni-hamburg.de
>>> https://mailman.rrz.uni-hamburg.de/mailman/listinfo/arts_users.mi
>>> 
> _______________________________________________
> arts_users.mi mailing list
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