Hi, when you use z_fieldfromhse arts assumes an altitude at some pressure level and uses your specified temperature profile to extrapolate the altitudes at other pressure levels.
If the lowest of these altitude levels is above your surface, arts gives the error you have posted. So my guess is that you changed the temperature profile you are using, or possibly the reference pressure level. Anyhow, In general if you instrument is placed above the surface, and looking Uppwards, where you define the surface should not have any influence. Ole martin ________________________________ From: arts_users.mi-boun...@lists.uni-hamburg.de <arts_users.mi-boun...@lists.uni-hamburg.de> on behalf of Pauline Martinet <pauline.marti...@meteo.fr> Sent: Thursday, December 7, 2017 11:44:51 AM To: arts users mi Subject: [arts-users] arts run time error in z_fieldfrom HSE Hi everybody, I am facing an error I had with ARTS several years ago that I though was resolved. For some profiles I get the error message: Run-time error in method: z_fieldFromHSE The surface altitude (*z_surface*) cannot be outside of the altitudes in *z_field*. Stopping ARTS execution. To avoid this problem, I define the first level of the z_field grid to be 1 meter lower than the z_surface. 1 meter difference was enough but this time for a new dataset, the z_field grid needs to start at least 3 to 5 meters below the z_surface so that ARTS does not crash. Can it cause large differences to the simulation if I define the altitude grid 5 meters lower ? Can this problem come from the pressure grid even though the error message only specifies the altitude ? I am simulating a ground-based microwave radiometer. Thank a lot for any help, Best regards, Pauline ----- M?t?o-France ----- Dr. Pauline Martinet Chercheur CNRM/GMEI/MNPCA pauline.marti...@meteo.fr Fixe : +33 561079031
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