Dear Song shuhua,

You have discovered one of the reasons why we created the standard habits. It is difficult to run DDA on the large particles at high frequencies, and we had a limit at size parameter = 10. This means that the highest frequencies not are present for all particles.

In the standard habits we assume fill in frequency by simply copy the results from the highest existing frequency. An extrapolation is risky, and this gives a conservative solution.

So if you want to use the database directly you need to consider this question. If I remember it correctly, there are some function(s) in the interface to handle this. But there are for sure more ways to handle this.



On 2022-02-28 10:27, 宋淑华 wrote:
Dear all,

Hello! I met a problem when I was using ARTS's scattering database.

I used a matlab program named demo_ssp4arts.m in DataInterfaces to convert the scattering data of LargePlateAggregate_Id20 particles in the database from nc format to the format used internally by ARTS. The results of the data transformation are given in the attachment. Next, I imported the extracted scattering data into the ARTS development version (arts-2.5.0). Then when simulating the brightness temperature of 664GHz, the problem shown in the image below occurred. But when I used the corresponding scattering data from StandardHabits directly, this problem didn't arise. I was confused, is the scattering data I extracted wrong? I’d appreciate it if you could help me look at this extracted scattering data.

Looking forward to your replies and suggestions.

Best Regards,

Song shuhua

scat_data.xml.bin <> (66MB, 2022年03月15日 17:25 到期) 查看下载信息 <>

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