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CLDPROP_L2 Issues

Tracking of known problems and subsequent fixes is an important issue for Continuity Atmosphere data users. This page will act as a repository of all known Continuity Atmosphere Data Product problems, as well as how to determine the problematic version (and the fixed version if available) of the NetCDF4 data -- therefore data users should check this page for updates regularly. Data Users unfamiliar with how to properly track problems and fixes by determining the version of their downloaded NetCDF4 files should refer to the documentation in the Introduction sublink (the top link along the LHS of this page).   Note that a checkmark (✔) in the tables below means Data Issue or Quality Statement applies.  A blank means it's been fixed or does not apply.




L2 Cloud (CLDPROP_L2) Data Issues: Table of Contents & Anchor Links  (Note: Anchor Links point to a specific place within this page.)

Collection/Platform where Issues Apply
Issue Impact     v1/MODIS v1/VIIRS Link
#1. Very Intermittant CER Liquid < 4.0 microns

L

 

 

Link

L2 Cloud (CLDPROP_L2) Data Quality Statements: Table of Contents & Anchor Links  (Note: Anchor Links point to a specific place within this page.)

Collection/Platform where Quality Statements Apply
Quality Statement Impact     v1/MODIS v1/VIIRS Link
#1. None Found Yet

Q

 

 

 

 

Link




Issue #1: Very Intermittantly Cloud Effective Radius Retrievals for Liquid Water Clouds drop below the expected minimum value of 4.0 microns

Description: In a very small number of cases, the Cloud Effective Radius Retrievals for Liquid Water Clouds drop below the expected minimum value of 4.0 microns. In the Continuity Cloud Retrieval Algorithm, only the Alternate Solution Logic (ASL) cuts off at 4.0 microns explicitly. The main solution logic (and this is for all of CHIMAERA) cuts off on library_radii(1), which in the case of MODIS and VIIRS (and several other heads) is 2.0 microns.  However, from selected case study results, this is a very rare event, occurring in less than 0.001% of cases.

 

PGE Versions & Production Dates of Problematic & Corrected Data:

Problematic Data Corrected Data
PGE Versions Production Dates PGE Versions Production Dates
≤ CLDPROP_L2 v1 ≤ 2019 001 (01/01/2019) Not Corrected Not Corrected

Data Dates Affected: 1 March 2012 (Day 061) and forward (All Data Dates)

Affected Platform: MODIS AQUA and VIIRS SNPP

Versions Affected: Version.1.0

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Quality Statement #1: None Found Yet

Description: .

Guidance to Users:

Data Dates Affected:

Affected Platform:

Versions Affected:

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