Dear Emma, yes, there are differences between continuum models, and this reflects a real scientific uncertainty. Measurements of the continuum are not trivial, and we do not know which model is right.
For the broad frequency range that you want to simulate on, I would recommend the CKDMT252 continuum models (there are different ones for different gases). They are “state of the art” in the sense that they are quite new and widely used. Best regards, Stefan > On 12.01.2015, at 17:53, Turner, Emma C. <[email protected]> wrote: > > Dear Stefan, > > I am wanting to use the forward model in q_arts to simulate the radiance > profile seen from the ground looking straight up, from 10-2000 GHz > (submillimetre range). How should I decide which one to use? I read the > documentation but it doesn't make recommendations. The reason I was > interested in the ATM model was because the submillimetre SMILES instrument > on the ISS used a continua model based on this. > > What is the controlfile code I need to use? I have been testing including the > different models that are in the continua.arts file and there are differences > between the radiances obtained. > > Thanks > Emma > > > -----Original Message----- > From: Stefan Buehler [mailto:[email protected]] > Sent: 12 January 2015 15:27 > To: Turner, Emma C. > Cc: [email protected] > Subject: Re: [Qpack] Continuum Models in ARTS > > Dear Emma, > > you need a bit of controlfile code to actually use the continua. The ones > that are commonly used are all defined in file continua.arts that is part of > the ARTS distribution (H2O-SelfContCKD24 is there for example). But not all > are listed there, so to use the Pardo continuum you would have to add a > similar snippet of controlcode yourself (we can help with that if necessary). > I’m not aware of anybody ever using that particular model since Thomas > implemented it, so it is far from well validated. > > In general, you should not use these models blindly, some are much more > well-tested than others. And not all combinations of continuum and line > spectrum make sense! > > What is it that you want to do? > > Best wishes, > > Stefan > >> On 12.01.2015, at 15:18, Turner, Emma C. <[email protected]> wrote: >> >> Hello, >> >> I think this is an ARTS question more than qpack but I have been looking at >> the range of pure continuum models available, listed in table 6.3 in chapter >> 2 of the ARTS theory documentation and it seems that some of them aren't >> recognised when I specify them. The error is, for example, 'Cannot find >> model H2O-SelfContCKD242 in abs_cont_names.' >> >> Of the H2O continua these are a lot of the foreign continua - >> H2O-ForeignContCKDMT100, H2O-ForeignContCKD222, H2O-ForeignContCKD242, >> H2O-ForeignContCKD24, H2O-ForeignContATM01 and also H2O-SelfContCKD242 and >> H2O-SelfContCKD222. I particularly wanted H2O-ForeignContATM01. This is the >> same with some of the O2 and N2 models, I can only get 5 of the O2 models >> and 2 of the N2 models to work. Can you help? >> >> Thankyou >> Emma >> >> This message (and any attachments) is for the recipient only. NERC is >> subject to the Freedom of Information Act 2000 and the contents of this >> email and any reply you make may be disclosed by NERC unless it is exempt >> from release under the Act. Any material supplied to NERC may be stored in >> an electronic records management system. >> _______________________________________________ >> qpack mailing list >> [email protected] >> https://www.sat.ltu.se/mailman/listinfo/qpack > > > This message (and any attachments) is for the recipient only. NERC is subject > to the Freedom of Information Act 2000 and the contents of this email and any > reply you make may be disclosed by NERC unless it is exempt from release > under the Act. Any material supplied to NERC may be stored in an electronic > records management system. _______________________________________________ qpack mailing list [email protected] https://www.sat.ltu.se/mailman/listinfo/qpack
