The remote sensing techniques applied for the earth's surface features, is generally confined to the following wave lengths :

• 0.4 to 1.3, 1.5 to 1.8, 2.2 to 2.6 μm
• 2.2 to 2.6, 3.0 to 3.6, 4.2 to 5.0 μm
• 4.2 to 5.0, 7.0 to 15.0 μm and 1 cm to 30 cm
• All of these