Hi everybody, I have noticed differences between the forward model calculations when I call Qpack or the function arts_y. I am simulating a microwave radiometer between 22 and 60 GHz. I have a matlab routine where I define the structures Q and O. Then I call the two functions: TB=arts_y(Q); and L2=qpack2(Q,O,Y); with Y.Y=[] : from what I read in the Qpack documentation it should give the same results.
But then I do not obtain the same values of brightness temperatures when simulating the brightness temperature with Qpack or arts_y: This is from Qpack: 37.6242 36.7163 32.3708 24.4462 22.0529 19.4580 18.6558 110.6579 152.7556 250.9260 279.8277 284.9573 285.2151 285.3064 This is from arts_y: 37.5430 36.6337 32.2927 24.3829 21.9958 19.4087 18.6113 110.5074 152.5850 250.8197 279.7959 284.9563 285.2181 285.3116 For the call to arts-y I had to define: Q.T_FIELD, Q.Z_FIELD, Q.VMR_FIELD but I normally use the same values as the ones defined in Q.ABS_SPECIES and Q.T for Qpack. Do you have any idea on what I am doing wrong ? Thank you very much. Best regards, Pauline ----- Météo-France ----- Dr. Pauline Martinet Chercheur CNRM/GMEI/LISA [email protected] Fixe : +33 561079031 Site web: www.sites.google.com/site/martinetpauline31
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