Instrumentation - Polar Imager 

The Advanced Very High Resolution Radiometer (AVHRR). The AVHRR is a radiation-detection imager and has five detectors which collect data in five channels given below:

  • Note that there is no water vapor channel
  • Note that there are two visible channels
  • Note the 1km resolution in ALL channels

Now, lets talk about the sounders......

Channel

Wavelength (micrometers)

Ground

Resolution

1 (visible)

0.58-0.68   1 km

2 (visible)

0.72-1.0 1km

3 (near infrared)

3.5-3.9  1km
4 (infrared) 10.3-11.3  1km
5 (infrared) 11.4-12.4 1km