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 Aerosol Deep Blue (AERDB_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 |
v1.0/MODIS |
v1.0/VIIRS |
|||
| #1. Degraded Geolocation required Reprocessing |
H |
|
✔ |
|||
| #2. Bad Refl. Band Cal. required Reprocessing |
L |
|
✔ |
|||
L2 Aerosol Deep Blue (AERDB_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 |
v1.0/MODIS |
v1.0/VIIRS |
Link | ||
| #1. None Found Yet |
Q |
|
|
|||
Issue #1: Degraded Geolocation for VIIRS SNPP data between 20 Dec 2019 and 6 Jan 2020 required reprocessing
Description: SNPP VIIRS Continuity Atmosphere L2 and L3 products had degraded geolocation data during the indicated time period which warranted a reprocessing. Affected products have filenames that begin with AERDB, AERDT, CLDMSK, CLDPROP, and FSNRAD. (Note that FSNRAD is the L2 VIIRS and CrIS fusion product for SNPP and J1 (NOAA-20), where FSN stands for “fusion”.) Version 1.0 data during the indicated time period should be replaced by filenames with creation timestamps on or after January 8th 2020 (2020 008).
PGE Versions & Production Dates of Problematic & Corrected Data:
| Problematic Data | Corrected Data | ||
|---|---|---|---|
|
PGE Versions |
Production Dates |
PGE Versions |
Production Dates |
|
AERDB_L2 v1.0 |
< 2020 008 (01/08/20) |
AERDB_L2 v1.0 |
≥ 2020 008 (01/08/20) |
Data Dates Affected: 20 December 2019 (Day 354) starting at 13:54:00 UTC and forward through 6 Jan 2020 (Day 006) ending at 13:53:59 UTC
Affected Platform: VIIRS SNPP
Versions Affected: Version.1.0
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Issue #2: Incorrect VIIIRS Reflective Band Calibration on 16-17 Jan 2020 required reprocessing
Description: SNPP VIIRS data users, please note that the quality of all NASA Level-1 data and derived downstream products were likely affected by incorrect solar and lunar vector calculations between 2020-016 and 2020-017. The VIIRS Characterization Support Team (VCST) delivered an updated planetary ephemeris look-up table that corrected this anomaly, at which point all affected datasets were reprocessed. For additional details on this anomaly, check the Land Data Operational Products Evaluation (LDOPE) group’s description: https://lpdaac.usgs.gov/tools/ldope/
PGE Versions & Production Dates of Problematic & Corrected Data:
| Problematic Data | Corrected Data | ||
|---|---|---|---|
|
PGE Versions |
Production Dates |
PGE Versions |
Production Dates |
|
AERDB_L2 v1.0 |
< 2020 017 (01/17/20) |
AERDB_L2 v1.0 |
≥ 2020 017 (01/17/20) |
Data Dates Affected: 16 January 2020 (Day 016) starting at 00:00:00 UTC and forward through 17 Jan 2020 (Day 017) ending at 12:00:00 UTC
Affected Platform: VIIRS SNPP
Versions Affected: Version.1.0
Quality Statement #1: None Found Yet
Description: .
Guidance to Users:
Data Dates Affected:
Affected Platform:
Versions Affected: