11. The apparatus is now known as the Nichols radiometer . 12. The vertical lines indicate typical frequencies used by satellite sensors like the AMSU radiometer . 13. Ground-based radiometers usually use an ambient temperature target as hot reference. 14. A radiometer for measuring the intensity of radiant energy is located in the cab. 15. EB states that Crookes Radiometer rotates the direction it does because of pressure differences. 16. The Crookes radiometer turns when the MFP is larger than the size of the vanes. 17. The radiometer measures water vapor and ozone. 18. The radiometer measures ClO, ozone, sulfur dioxide, nitric acid and water vapor. 19. Its predecessor, the scanning multichannel microwave radiometer ( SMMR ), provided similar information. 20. Usually, Earth observation satellites have three or more radiometers ( Landsat has seven ).