MODAPS PCR 16-014
| PCR Number | 16-014 |
|---|---|
| Date | 2016-06-30 |
| Initiator | Richard Frey |
| Abstract | PGE03 v6.0.50. LEOCAT code updated to account for the changes made in the new GDAS data. |
| Problem Statement | Using the new GDAS from NCEP starting from Day 2016133 impacted cloud top and cloud optical properties products. |
| Description of Change | Update the LEOCAT code shared by PGE03 (cloud mask process) and PGE06 (cloud top) to account for the changes made in the new GDAS. |
| Products Affected | MOD35_L2 |
| Software Affected | MOD_PR35 (PGE03 6.0.50) |
| Processing String to Receive the Change | Terra and Aqua Forward Reprocessing |
| Downstream Product Effects | MOD06_L2, MOD08_D3, MOD08_E3, MOD08_M3 |
| Data Granules to be Used for Science Testing | One day science test for Day 2016103 comparing the result from all perturbations - old and new GDAS with the old and new LEOCAT code. |
| Justification | Use of new version of GDAS from NCEP data starting day 2016133 negatively impacted the 1km cloud top properties (MOD06). Fixing the PGE06 process generating the MOD06 required update to the LEOCAT that is also shared by PGE03 that generates the cloud mask. Though impact on Cloud Mask from this update to PGE03 and use of new GDAS is minimal and insignificant, rebuilding of PGE03 using the updated LEOCAT warrants reprocessing of Cloud Mask (MOD35). |
| Effective Date for Implementation of Change | Completed. |
| Status | Major algorithm development completed. Steve Platnick approved on 06/30/2016. Michael King approved on 06/30/2016. |
