Revised landsat-5 tm radiometric calibration procedures and postcalibration dynamic ranges

TLDR

Further updates to improve relative detector‑to‑detector calibration, thermal band calibration, and Landsat‑4 TM calibration are being investigated. The study aims to implement a new radiometric calibration procedure and revised parameters for Landsat‑5 TM data effective May 5 2003. The new calibration uses revised parameters to convert calibrated products to radiance, with reflective bands (1‑5, 7) calibrated via a lifetime curve from the internal calibrator, cross‑calibration with Landsat‑7 ETM+, and vicarious measurements, while the thermal band remains calibrated with the internal calibrator. The updated calibration is expected to enhance absolute accuracy, temporal consistency, and alignment with Landsat‑7 ETM+ data.

Abstract

Effective May 5, 2003, Landsat-5 (L5) Thematic Mapper (TM) data processed and distributed by the U.S. Geological Survey (USGS) Earth Resources Observation System (EROS) Data Center (EDC) will be radiometrically calibrated using a new procedure and revised calibration parameters. This change will improve absolute calibration accuracy, consistency over time, and consistency with Landsat-7 (L7) Enhanced Thematic Mapper Plus (ETM+) data. Users will need to use new parameters to convert the calibrated data products to radiance. The new procedure for the reflective bands (1-5,7) is based on a lifetime radiometric calibration curve for the instrument derived from the instrument's internal calibrator, cross-calibration with the ETM+, and vicarious measurements. The thermal band will continue to be calibrated using the internal calibrator. Further updates to improve the relative detector-to-detector calibration and thermal band calibration are being investigated, as is the calibration of the Landsat-4 (L4) TM.