NASA Earth Science Data Records

The NASA ROSES-13 call for the S-NPP Science Team was for both a Science Team that would produce NASA Earth Observing System (EOS) continuity data products and for the establishment of multiple Science Investigator-led Processing Systems (SIPS) that would produce the science data products developed by the science teams. The science team selections focus on producing refined and/or alternative data products as well as the necessary Earth System Data Records (ESDRs). In this way, NASA assures that high-quality EOS continuity data products for Earth system science and applications, are available for all.

In order to generate and distribute NASA Suomi-NPP VIIRS Land Science products the teams must first develop Algorithm Theoretical Basis Documents (ATBDs) prior to transferring for operational processing at the NASA SIPS. Once this transition occurs, the data can be delivered for long-term archiving and distribution at the one of the Distributed Active Archive Centers. Most of the VIIRS Land products have their heritage in MODIS product algorithms, and in some cases early versions of the MODIS code were used by the operational VIIRS algorithm development teams. The VIIRS Land Discipline Team, the Land SIPS, and the Validation leads have established priorities and phased plans for the production of Suomi NPP Land Science Products (see table below). The ATBDs for these products will include updates to reflect the latest MODIS (Collection 6) algorithm principles, as well as the VIIRS instrument capabilities and unique specifications.

NASA EOS Products Algorithms Delivered to Land SIPS Product Integration and Testing ATBD Delivery Delivery of User's Guide Products Delivered to assigned DAAC
Surface Reflectance
Snow Products
MAIAC* Qtr 2, 2021 Qtr 3, 2021 Qtr 3, 2021 Qtr 4, 2021 Qtr 4, 2021
Burned Area
Active Fires
Vegetation Index
Ice Surface Temp
Sea Ice Cover
Black Marble
DSR/PAR* Qtr 2, 2021 Qtr 2, 2021 Qtr 2, 2021
GWR* Qtr 2, 2021 Qtr 2, 2021 Qtr 2, 2021 Qtr 3, 2021 Qtr 3, 2021
  ✓ Indicates Completed Task; * Indicates Collection 2 (C2), commencing in April 2021


NASA's VIIRS Land SIPS generates science data products using algorithms and software developed by the Suomi NPP science teams and delivers the products to NASA-designated DAACs for archive and distribution.

The latest version with the best and most current algorithms is the reprocessing known as VIIRS Collection 1 or C1. Collection 2 reprocessing is being planned to begin in September 2020.

VIIRS Processing by the Land SIPS

Land SIPS processing will be separated into three separate modes, all operating simultaneously:

  • Forward Stream Processing Mode
  • Create the best possible global VIIRS L1B and Land L2/L3 products using the highest fidelity input data sources (requires 24-48 hour delay). Land L2/L3 products are delivered to LP and NSIDC DAACs.

  • Near Real-Time (NRT) Processing Mode
  • Creates low latency global VIIRS products (< 3 hours) within the Land, Atmosphere Near Real-Time Capability for EOS
    (LANCE) system.

  • Experimental Reprocessing and Evaluation Mode
  • Create global VIIRS Level 1B and Land L2/L3 test for review and evaluation by the SNPP Science Team.