NPP VIIRS Product Quality Documentation

NPP VIIRS QA - Product Quality Documentation


For all the Products untill further notice: The NPP VIIRS data distributed from LAADS is currently BETA QUALITY (with known problems and Not for Science Use) and are not intended for scientific use. VIIRS calibration is based on prelaunch data and on-orbit calibration and characterization has begun. Currently, data from the visible, near infrared (NIR), and day-night (D/N) bands are beta quality. The visible bands are not useable before the nadir door was opened on Nov. 21, 2011. The thermal (short-wave, medium-wave and long wave infrared -- SMWIR/LWIR) bands, and higher order products that depend on them, e.g. cloud mask, are not useable before the thermal bands were cooled down on Jan. 20, 2012. The higher order products will not be useable in the near future because they are in early stages of development and evaluation.

Click here for more information on product known issues.


NPP_VMAE_L1 VIIRS/NPP 5-Min L1 Swath SDR 750m, Moderate
NPP_VIAE_L1 VIIRS/NPP 5-Min L1 Swath SDR 375m, Imagery
NPP_SRFLMIP_L2 VIIRS/NPP 5-Min L2 Swath IP 750m, Surface Reflectance
NPP_SRFLIIP_L2 VIIRS/NPP 5-Min L2 Swath IP 375m, Surface Reflectance
NPP_CMIP_L2 VIIRS/NPP 5-Min L2 Swath IP 750m, Cloud Mask
NPP_VAFIP_L2 VIIRS/NPP 5-Min L2 Swath IP 750m, Fire Mask & Quality Flags
NPP_VAMIIP_L2 VIIRS/NPP 5-Min L2 Swath IP 750m, Aerosol Model Information
NPP_VAOTIP_L2 VIIRS/NPP 5-Min L2 Swath IP 750m, Aerosol Optical Thickness
NPP_VICIP_L2 VIIRS/NPP 5-Min L2 Swath IP 750m, Sea Ice Concentration
NPP_VIST_L2 VIIRS/NPP 5-Min L2 Swath IP 750m, Ice Surface Temperature
NPP_VRVI_L2 VIIRS/NPP 5-Min L2 Swath IP 750m, Vegetation Indices
NPP_VIWIP_L2 VIIRS/NPP 5-Min L2 Swath IP 375m, Sea Ice Weights
NPP_VLST_L2 VIIRS/NPP 5-Min L2 Swath IP 750m, Land Surface Temperature
NPP_VSCD_L2 VIIRS/NPP 5-Min L2 Swath IP 750m, Snow Fraction
NPP_VSCM_L2 VIIRS/NPP 5-Min L2 Swath IP 375m, Snow Cover Map
NPP_VSIC_L2 VIIRS/NPP 5-Min L2 Swath EDR 750m, Ice Age
NPP_VISA_L2 VIIRS/NPP 5-min L2 Swath EDR 750, Surface Albedo

Product quality by Data Acquisition Period

Data PeriodProduct Quality StatusComments
Nov 10, 2011 - Nov 20 2011 Inferred Failed Nadir door was closed during this period, no earth view data acquired by the instrument. PGEs run with back of the door signal acquired by the sensor, mostly to verify end to end functioning of various segments - the ground segment, communication, production, distribution network etc.
Nov 21, 2011 - Jan 19, 2012 Beta, Suspect Nadir door opened on Nov 21 at 16:05 GMT, but the thermal band cooler was closed until Jan 18 2012 05:00 GMT, and hence thermal bands weren't operational during this period. The thermal (short-wave, medium-wave and long wave infrared -- SMWIR/LWIR) bands, and higher order products that depend on them, e.g. cloud mask, are not useable during this period.
Jan 20, 2012 - Feb 17, 2012 Beta, Being Investigated Thermal bands cooled down to the operational temperature. Reflective and thermal bands all in science mode. VIIRS calibration is based on prelaunch data and on-orbit calibration and characterization has begun. Currently, data from the visible, near infrared (NIR), and day-night (D/N) bands are beta quality.
Feb 18, 2012 - current Provisional or Validation Stage1 SNPP products have been reprocessed using the best of calibration LUT and science team recommended algorithms generating consistent records from the entire mission period. Most of the products have reached maturity level or Validation Stage 1 or Provisional.