Sensors and Their Specifications

S K Diwakar

Wide Field Sensor

IRS-1C, IRS-1D, IRS-P3, which are all second generation Indian remote

sensing satellites,carried the WIFS sensor. The WIFS camera uses an 8

element refractive optics like in LISS-III. Two such cameras are mounted

with overlapping pixels of imaging. WIFS data was used in assesment of rabi

cropped area, crop inventory, observation of crop phenology etc.

Band Wavelength

(µm)

Resolution

(m)

Swath

Width

(km)

Revisit time

(days)

Band 1 (VIS) 0.62 to 0.68 188 774 5

Band 2 (NIR) 0.77 to 0.86 188 774 5

Band 3

(SWIR) 1.55 to 1.75 188 804 5