How to classify aerosol in CALIPSO profiles products
Posted: Sat Nov 12, 2022 1:40 pm America/New_York
I want to calculate mean extinction profile of aerosol subtype by CALIPSO l2 Aprof products ,and this article are referenced ,https://www.google.com.hk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwi04az7oan7AhWU7WEKHTo1C94QFnoECBAQAQ&url=https%3A%2F%2Fwww-calipso.larc.nasa.gov%2Fresources%2Fcalipso_users_guide%2Ftools%2Ffiles%2FGenerate_Mean_Extinction_Profile_v3.pdf&usg=AOvVaw1q_5ynojms6XEFJ2n9yrVR
"isAerosol = squeeze(ftype(:,:,1) == 3 | ftype(:,:,2) == 3);" is to get the feature type.
subtype is AVD data(bits 10 - 12), and it can be used to classify aerosol.
However, CALIPSO extinction is two dimensional, but AVD is three dimensional to account for the two 30 m features per 60 m extinction range bin below 20.2 km. When the aerosol types corresponding to two 30 m features are different, which kind of CALIPSO aerosol subtypes does the 60 m extinction layer belong to?
Forexample , to calcaulate dust information:
1. "isDust = squeeze(subtype(:,:,1) == 2 | subtype(:,:,2) == 2);" ?
2. "isDust = squeeze(subtype(:,:,1) == 2 & subtype(:,:,2) == 2);" ?
3. just delet the data of this 60m extinction layer ?
Thanks!
"isAerosol = squeeze(ftype(:,:,1) == 3 | ftype(:,:,2) == 3);" is to get the feature type.
subtype is AVD data(bits 10 - 12), and it can be used to classify aerosol.
However, CALIPSO extinction is two dimensional, but AVD is three dimensional to account for the two 30 m features per 60 m extinction range bin below 20.2 km. When the aerosol types corresponding to two 30 m features are different, which kind of CALIPSO aerosol subtypes does the 60 m extinction layer belong to?
Forexample , to calcaulate dust information:
1. "isDust = squeeze(subtype(:,:,1) == 2 | subtype(:,:,2) == 2);" ?
2. "isDust = squeeze(subtype(:,:,1) == 2 & subtype(:,:,2) == 2);" ?
3. just delet the data of this 60m extinction layer ?
Thanks!