The LN2 calibration on 3/15 showed a large drift of the V-band calibration parameters. The
radiometer was calibrated again in June and was sent out for repairs in July 2007.
Between 3/15 and 7/13 2007 the V-band data are incorrect and should be disregarded. The
failure affects the retrieved vertical profiles of temperature and humidity as well.
Please note that the hardware failure affected the 7 V-band channels only (51-60 GHz).
Channels in the frequency range between 20 and 30 GHz are not affected. Integrated liquid
water (LWP) and water vapor (PWV) are not affected since they use K-band channels only. |