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Surface Mapping of Earth-like Exoplanets using Single Point Light Curves

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A harmonized global nighttime light dataset 1992-2018.

Xuecao Li¹, Yuyu Zhou², Min Zhao¹

¹Department of Geological and Atmospheric Sciences, Iowa State University, Ames, IA, 50011, USA.

Scientific Data

|June 6, 2020

Summary

This summary is machine-generated.

This study integrates nighttime light data from DMSP and VIIRS satellites, creating a consistent 1992-2018 global dataset. This harmonized nighttime light (NTL) data supports research on human activities like electricity consumption and urban growth.

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Area of Science:

Earth Observation
Remote Sensing
Geospatial Analysis

Background:

Nighttime light (NTL) data from satellites like DMSP/OLS and VIIRS are valuable for monitoring human activities globally.
Existing NTL datasets from DMSP (1992-2013) and VIIRS (2012-2018) have inconsistencies, limiting their combined historical analysis.
The full potential of historical NTL archives remains underexplored due to data discrepancies.

Purpose of the Study:

To generate an integrated and consistent global nighttime light dataset spanning from 1992 to 2018.
To harmonize inter-calibrated DMSP NTL observations with simulated DMSP-like VIIRS NTL observations.
To provide a reliable, temporally extended NTL dataset for diverse human activity studies.

Main Methods:

Inter-calibration of DMSP/OLS NTL data.
Simulation of DMSP-like NTL observations from VIIRS data.
Harmonization of DMSP and VIIRS NTL data to create a consistent time-series.

Main Results:

A globally consistent NTL dataset from 1992 to 2018 was successfully generated.
The integrated dataset exhibits consistent temporal trends across the extended period.
The resulting DMSP NTL time-series data supports long-term monitoring.

Conclusions:

The harmonized NTL dataset bridges the gap between DMSP and VIIRS, enabling comprehensive historical analysis.
This extended dataset is crucial for studying long-term dynamics of human activities, including electricity consumption and urban expansion.
The study unlocks the potential of historical NTL archives for global environmental and socioeconomic research.