Re: [arts-users] FASTEM in ARTS
Dear Patrick and Oliver,
Thank you for your advice! Indeed, I had used the 2.2.64 stable version
assuming it was a safe choice for a beginner. Now I tried Patrick's piece of
code for FASTEM call with the current ARTS version from Oliver's GitHub
(2.3.1234, I assume), and everything worked flawlessly.
I appreciate your help a lot.
Best regards,
Natalia
Natalia Bliankinshtein
Research Council Officer/Agent du Conseil de recherches
NRC Aerospace/CNRC Aérospatiale
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
Sent: March 7, 2019 2:21 PM
To: Bliankinshtein, Natalia; arts_users.mi@lists.uni-hamburg.de
Subject: Re: [arts-users] FASTEM in ARTS
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 Aérospatiale
> 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
> 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 FAST
Re: [arts-users] FASTEM in ARTS
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 Aérospatiale 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 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 Aérospatiale > 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 arts_users.mi@lists.uni-hamburg.de https://mailman.rrz.uni-hamburg.de/mailman/listinfo/arts_users.mi
[arts-users] FASTEM in ARTS
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 Aérospatiale 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
