Table 2 Descriptions of remote sensing drought indices.

From: A global near real-time dataset of Microwave Integrated Drought Index from the Fengyun-3 satellites

Drought Indices

Formula

PCI

(Pi − Pmin)/(Pmax − Pmin)

SMCI

(SMi − SMmin)/(SMmax − SMmin)

TCI

(LSTmax − LSTi)/(LSTmax − LSTmin)

MIDI_XX0

α × PCI + β × SMCI

MIDI_X0X

α × PCI + β × TCI

MIDI_0XX

α × SMCI + β × TCI

MIDI_XXX

α × PCI + β × SMCI + (1 − α − β) × TCI

  1. Four types of weight constitutions (α and β) were used to calculate the Microwave Integrated Drought Index (MIDI).
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