Question

16. Discuss the two main remote sensing techniques used to determine ocean temperatures, including how the techniques work and their relative strengths and weaknesses.

Answer 1

Answer and Explanation:

The two main remote sensing techniques used to determine ocean temperature are

1. Thermal infrared technique
2. passive microwave technique

THERMAL INFRARED TECHNIQUE : This remote sensing technique is used from a very long time.In this technique the light wavelength should be around 3.5 to 3.8 μm . This method of remote sensing is mostly used in night. This technique uses advanced very high resolution radiometer

BENEFITS OF THIS TECHNIQUES:

• High accuracy
• High resolution
• Are used from a long time

WEAKNESS:

• depends on atmospheric condition

PASSIVE MICROWAVE TECHNIQUE : This technology uses microwave which has very high frequency generally 5 to 10 GHz. In this technique we uses advance microwave scanning radiometer, scanning multichannel microwave radiometer. In this the frequency channel are used for determining the wind speed

BENEFITS OF THIS TECHNIQUES:

• clouds are tansarent
• less sensitive to temperature than infrared technique

WEAKNESS:

• Poor accuracy
• poor resolution