# Presentation: 713833

## VIIRS Land PEATE

**Masuoka, Wolfe,  Isaacman and Devadiga**

## Land PEATE Overview

- The NPOESS Preparatory Project (NPP) VIIRS Land Product Evaluation and Algorithm Test Element (PEATE) supports the NPP Science Team in assessing the utility of NPP Land Environmental Data Records (EDRs) for climate research
- Land PEATE builds upon the MODIS approach and infrastructure for science team support, product generation and quality assessment
- VIIRS product generation software runs in MODAPS
- Gridded (Level 3) products (Diagnostic Data Records) facilitate comparison with MODIS products and ground-truth
- Products available online for Science Team evaluation
- LDOPE (Land Data Operational Product Evaluation) team works with Science Team in evaluating product quality
- Land PEATE supports CERES on NPP with reprocessing of VIIRS SDR and aerosol products

## Land PEATE Context Diagram

**Land PEATE Context Diagram**

## Product Evaluation Flow

**Product Evaluation Flow**

## Land PEATE Architecture - Overview

- Uses MODAPS software for processing and distribution
- Scalable clusters of inexpensive Intel-based servers running open source software
- Now:  16 servers and 20TB storage running VIIRS SCI and OPS s/w and Science Team improvements.
- At launch, 120 servers and 600GB storage, run processing at least 10x

## Upcoming Milestones

- Power installed for servers and storage – September 2008
- 360TB of storage and 40 more servers installed – October 2008
- Upgrade network bandwidth (1GigE to 10 GigE) – December 2008
- Launch-ready build of Land PEATE (Build 3)  – March 2009
- Functional thread tests (ingest XDRs, validate XDRs, support Cal.) – June 2009
- “Day in the Life” test with NPP SDS – January 2010

## LPEATE L2 PROCESSING

**LPEATE L2 PROCESSING**

**SCIENCE CODE**

**OPS  V1.4**

**SCI, OPS V1.4,1.5**

**AEROSOL   OPTICAL THICKNESS**

_**MODAPS ARCHIVE**_** ****PROXY SDRS**** ****GRIB FILES GLOBAL GRIDDED DATA**

**LAND SURFACE REFL**

## LPEATE DIAGNOSTIC DATA RECORDS

**LPEATE DIAGNOSTIC DATA RECORDS**

## OPS code re-integration (Build 1.5)

| Software | Status |
| --- | --- |
| Fire Mask | Completed |
| Cloud Mask | Completed |
| Aerosol Optical Thickness | Completed |
| Surface Reflectance | May  |
| Vegetation Index | May  |
| Land Surface Temperature | June |
| Aerosol Particle Size, Suspended Matter | June  |
| Surface Type | June |
| Land Surface Albedo | July  |
| Cloud Optical Properties | July  |
| Snow | July |
| Sea Ice Characterization, Ice Surface Temp. | August |

## Build 1.5 integration and DDRs

| Software | Status |
| --- | --- |
| RDR-SDR-GEO Code  | June-July |
| OPS Granulation/Gridding Wrapper | June-July |
| Granulation to Gridding Routines | July |
| Gridding to Gridding Routines | August |
| Adapt MODIS L2g to VIIRS geometry | Completed |
| VIIRS L2g pointers and L2g geo-angles | Completed |
| Daily Surface Reflectance, Fire and Snow DDR | Completed |
| 8-day Surface Reflectance,  Surface  Temperature, Snow and Fire | June-Sept |
| 16-day  BRDR/Albedo, VI | October |
| 96-day Surface Type | December |

## LPEATE LEVEL 1 & 2 HDF5->4 AGGREGATOR

**LPEATE LEVEL 1 & 2 HDF5->4 AGGREGATOR**

## HDF 5->4 AGGREGATOR GUI

**HDF 5->4 AGGREGATOR GUI**

## Algorithm Comparison

**Algorithm Comparison**

## FireMask Algorithm Comparison

**FireMask Algorithm Comparison**

- Comparison of one scene between Fire Mask generated by the original Science Code algorithm and masks generated by OPs code V1.4 and V1.5 versions of the algorithm.  Data were generated using proxy data from MODIS Aqua

**2002222       12:45  Namibia**