Dear, I'm a new user of ARTS, recently I'm using the newest ARTS 2.3 and radiosonde data to do a simulation for a groud-based microwave radiometer, the question is, the simulated BT have a significant bias compared with observed one at water vapor channel, and i don't know how to correct it, is there someone could help me? the following is my script. thanks.
Arts2 {
INCLUDE "general/general.arts"
INCLUDE "general/continua.arts"
INCLUDE "general/agendas.arts"
INCLUDE "general/planet_earth.arts"
Copy(abs_xsec_agenda, abs_xsec_agenda__noCIA)
Copy(iy_main_agenda, iy_main_agenda__Emission)
Copy(iy_space_agenda, iy_space_agenda__CosmicBackground)
Copy(iy_surface_agenda, iy_surface_agenda__UseSurfaceRtprop)
Copy(propmat_clearsky_agenda, propmat_clearsky_agenda__OnTheFly)
Copy(ppath_agenda, ppath_agenda__FollowSensorLosPath)
Copy(ppath_step_agenda, ppath_step_agenda__GeometricPath)
IndexSet(stokes_dim, 1)
jacobianOff
cloudboxOff
ReadXML(p_grid, "sonde.p.xml")
ReadSplitARTSCAT(basename="spectroscopy/Perrin/", fmin=22e9, fmax=58e9)
abs_linesSetLineShapeType(option="HTP")
abs_linesSetNormalization(option="None") # this value affect brightness temp
abs_lines_per_speciesCreateFromLines
AtmRawRead(basename="./AtmRaw/sonde")
VectorSetConstant(surface_scalar_reflectivity, 1, 0.01)
Copy(surface_rtprop_agenda,
surface_rtprop_agenda__Specular_NoPol_ReflFix_SurfTFromt_surface)
# HTG3 Center Frequency point
VectorSet(f_grid, [22.24e9, 23.04e9, 23.84e9, 25.44e9, 26.24e9, 27.84e9,
31.40e9, 51.26e9, 52.28e9, 53.86e9, 54.94e9, 56.66e9, 57.30e9, 58.00e9])
sensorOff
StringSet(iy_unit, "PlanckBT")
AtmosphereSet1D
AtmFieldsCalc( vmr_zeropadding=1 )
Extract(z_surface, z_field, 0)
Extract(t_surface, t_field, 0)
Copy(sensor_pos, z_surface)
MatrixSet(sensor_los, [0])
abs_xsec_agenda_checkedCalc
lbl_checkedCalc
propmat_clearsky_agenda_checkedCalc
atmfields_checkedCalc
atmgeom_checkedCalc
cloudbox_checkedCalc
sensor_checkedCalc
yCalc
WriteXML("ascii", y, "results/bt.xml")
WriteXML("ascii", f_grid, "results/f_grid.xml")
WriteXML("ascii", abs_species, "results/species.xml")
WriteXML("ascii", sensor_pos, "results/sensor_pos.xml")
}
btsim.arts
Description: Binary data
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