The spectral bands used in Greenness Vegetation Index are (A) Red (B) Blue (C) Green (D) NIR (E) MIR
Choose the correct answer from the options given below:

Correct option is A

The correct answer is (A) A, D, C and E only

Explanation:
• The Greenness Vegetation Index (GVI) is part of the "Tasseled Cap Transformation," which was originally developed by Kauth and Thomas ($1976$) for Landsat MSS data.
• This transformation converts the original spectral bands into new axes that have physical meaning: Brightness (soil), Greenness (vegetation), and Yellowness/Wetness.
• To calculate the Greenness component, the transformation uses a weighted linear combination of several spectral bands. For modern sensors like Landsat TM/ETM+, this includes the Red, Green, Blue, Near-Infrared (NIR), and Mid-Infrared (MIR/SWIR) bands.
• The specific weights given to each band help isolate the spectral signature of healthy chlorophyll-containing vegetation from the background soil signal.

Information Booster:
• In the original 4-band Landsat MSS sensor, Greenness primarily used Green, Red, and two NIR bands.
• In the 6-band Tasseled Cap for Landsat TM, the Greenness index uses bands 1 through 5 and 7 (Blue, Green, Red, NIR, and two MIR bands).

Additional Knowledge:
• Brightness Index: Primarily represents soil reflectance and is a weighted sum of all bands.
• Wetness Index: Is sensitive to soil and plant moisture and relies heavily on the Mid-Infrared (MIR/SWIR) bands because water absorbs strongly in those wavelengths.
• Unlike NDVI which only uses two bands, GVI is a multi-band transformation.