VNP02OBC: VIIRS/NPP On-Board Calibrator Data

VIIRS/NPP On Board Calibrator (OBC) IP NRT data contains raw calibration and engineering observations from the Visible Infrared Imaging Radiometer Suite sensor on the Suomi NPP satellite. The dataset likely contains space view, solar diffuser, and blackbody observations, gain state information, and housekeeping data for radiometric calibration. It supports the transformation of sensor digital counts to calibrated radiance and reflectance values.

Use Cases

• Calibrating VIIRS Earth-view radiance based on onboard calibrator blackbody (OBCBB) observations.
• Monitoring sensor gain state and HAM side information for data quality assurance.
• Assessing long-term sensor stability using Solar Diffuser Stability Monitor (SDSM) data.
• Generating Level 1 intermediate products by applying calibration formulae documented in the OAD.

Strengths

• Provides direct, unscaled engineering data from the VIIRS calibration unit, essential for accurate radiometric correction.
• Includes observations from multiple calibration sources (space, solar diffuser, blackbody) for comprehensive sensor characterization.
• Data is processed from 6-minute acquisition windows, providing near-real-time (NRT) calibration information.

Limitations

• Column names and specific data structure are not provided in the metadata.
• Dataset size and row counts are unknown across all platforms.
• License information is inconsistently reported as 'other-license-specified' or null.

Provenance

Source

LANCEMODIS

Collection Method

Generated from processing 6 minutes of VIIRS data acquired during NPP satellite overpass.

Freshness

2026-04-09 21:12:58.149543

Geography

Global, from satellite orbit.