Hi,all It is the email I send before but the problem is still exist. who can help me?
Thanks and best regards Huang Yingzhu -----原始邮件----- 发件人: "黄莹珠" <[email protected]> 发送时间: 2015年6月19日 星期五 收件人: [email protected] 抄送: 主题: Re: Re: [arts-users] Fw: some question about multiple sensor_los simulation using arts Dear Patrick, Yes,it is very funny.If I set the surface as blackbody, the results is the same as other models.But if I set the surface as iyFastem, the results is changed. And I record the iyFastem's iy results, and calculated the download Td and transmition respectively.and I use the equation of Ts*trans+Td,then the results is the same as the total Tb the sensor received above the atmosphere that calculated by the other models. Why? Thank you again and best regards! Huang Yingzhu > -----原始邮件----- > 发件人: "Patrick Eriksson" <[email protected]> > 发送时间: 2015年6月17日 星期三 > 收件人: "黄莹珠" <[email protected]>, [email protected] > 抄送: > 主题: Re: [arts-users] Fw: some question about multiple sensor_los simulation > using arts > > Dear Huang Yingzhu, > > The Ppath structure is described carefully in the ARTS user guide (AUG). > In the latest version it is section: > > 10.5 The propagation path data structure > > but if you use arts v2.2 the section number is different. > > Note that "start" here means the start of the propagation path, at the > surface, not at the sensor. That is, e.g. lat=10 means that the surface > intersection is 10 degrees away from the sensor (for 1D). > > For window channels, how the Tb varies with zenith angle depends > critically on the surface emission. Do you use the same surface > emissivity in the different models? > > Best regards, > > Patrick > > > > On 06/17/15 08:17, 黄莹珠 wrote: > > > > > > > > -----原始邮件----- > > *发件人:* "黄莹珠" <[email protected]> > > *发送时间:* 2015年6月16日 星期二 > > *收件人:* [email protected] > > *抄送:* > > *主题:* some question about multiple sensor_los simulation using arts > > > > Hi, all > > I am confused that I use arts to simulate the multiple sensor_los > > of the measurement in microwave channels. The simulated Temperature > > brightness of windows channel such as 89GHz is bigger when the > > sensor_los is 180 then the one of the sensor_los is 126.5.see attached pic. > > It different from the results simulated by the other models. > > when I check the ppath of them I find the start pos have a latitude of > > 10 when the sensor_los is 126.65 but the latitude is 0 when the > > sensor_los is 180 , like follows: > > > > <?xml version="1.0"?> > > <arts format="ascii" version="1"> > > <Ppath><Index name="AtmosphericDimensionality">1</Index> > > <Index name="NumberOfPositionInPropagationPath">669</Index> > > <Numeric name="PropagationPathConstant">69249.3251344851</Numeric> > > <String name="RadiativeBackground">"surface"</String> > > <Vector name="StartPositionOfPropagationPath" nelem="2"> > > 0 > > 0.0720929145706464 > > </Vector> > > <Vector name="StartLOSOfPropagationPath" nelem="1"> > > 179.378097497658 > > </Vector> > > <Numeric name="StartLstepOfPropagationPath">0</Numeric> > > <Matrix name="PropagationPathPointPositions" nrows="669" ncols="2"> > > 63965.423084626 0.0659158935548021 > > 63865.4288625289 0.0659254544247858 > > 63765.4346406078 0.0659350155916627 > > 63665.4404188674 0.0659445770553191 > > 63565.4461973086 0.0659541388158118 > > 63465.4519759286 0.0659637008731693 > > 63365.4577547302 0.0659732632273631 > > 63265.4635337079 0.0659828258784501 > > 63165.4693128662 0.0659923888264871 > > 63065.4750922015 0.0660019520713888 > > 62965.4808717147 0.066011515613269 > > 62865.4866514094 0.0660210794520424 > > 62765.4924312793 0.0660306435875668 > > > > <?xml version="1.0"?> > > <arts format="ascii" version="1"> > > <Ppath><Index name="AtmosphericDimensionality">1</Index> > > <Index name="NumberOfPositionInPropagationPath">821</Index> > > <Numeric name="PropagationPathConstant">5788170.73405349</Numeric> > > <String name="RadiativeBackground">"surface"</String> > > <Vector name="StartPositionOfPropagationPath" nelem="2"> > > -488.411979784258 > > 11.822568283672 > > </Vector> > > <Vector name="StartLOSOfPropagationPath" nelem="1"> > > 114.827431716328 > > </Vector> > > <Numeric name="StartLstepOfPropagationPath">0</Numeric> > > <Matrix name="PropagationPathPointPositions" nrows="821" ncols="2"> > > 80520.0870012585 10.3120928628466 > > 80412.9346699752 10.3140130944758 > > 80305.789593217 10.3159333898205 > > 80198.6517713424 10.3178537488795 > > 80091.5212047147 10.3197741716519 > > 79984.3978936942 10.3216946581362 > > 79877.2818386406 10.3236152083316 > > 79780.5901730424 10.3253490196361 > > 79683.904421174 10.3270828828595 > > > > what does them means?who can help me.Thank you! > > > > Huang Yingzhu > > > > > > > > > > > > > > > > > > > > > > > > _______________________________________________ > > arts-users mailing list > > [email protected] > > https://www.sat.ltu.se/mailman/listinfo/arts-users > >
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