Re: [arts-dev] Problem with line absorption in ARTS

2017-10-13 Thread Richard Larsson
Hi Stuart, You are correct. The central frequency of the mirrored lines in arts are just set to be negative, letting all the other calculations go on as usual. So the addition of pressure shift is not handled correctly. (It even slows some functions down because we have to apply abs(F0), but th

Re: [arts-dev] Problem with line absorption in ARTS

2017-10-13 Thread Fox, Stuart
Thanks Richard. The fact that changing to the mirrored Lorentz lineshape solves the problem suggests to me that it is highly likely that the pressure shift is being added in the wrong direction for the mirrored lines if using abs_lines_per_speciesAddMirrorLines, hence the positive pressure shift

Re: [arts-dev] Problem with line absorption in ARTS

2017-10-13 Thread Richard Larsson
Stuart, I am also seeing the problem but I have no time to investigate in detail. As a temporary solution, there exists another lineshape called "Mirrored Lorentz" that you can use. Testing your controlfile with it instead, the results are more reasonable. Simply change your abs_lines_per_speci

[arts-dev] Problem with line absorption in ARTS

2017-10-13 Thread Fox, Stuart
Hi all, I wasn't sure whether to ask this on arts-user or arts-dev - I'm not sure whether there's a bug in ARTS or something wrong with my inputs! I'm trying to do some clear sky brightness temperature simulations for Earth using water vapour lines from HITRAN-2016. However, I am getting huge (