NSIDC Halts Production of the Near-Real-Time DMSP SSMIS Daily Polar Gridded Sea Ice Concentrations F17 Data

Due to the compromised data integrity with the DMSP F17 vertically polarized 37 GHz channel (37V) of the Special Sensor Microwave Imager and Sounder (SSMIS), which is a primary channel used for sea ice development, NSIDC is halting production of the Near-Real-Time DMSP SSMIS Daily Polar Gridded Sea Ice Concentrations F17 data and switching over to the F18 satellite, starting with 1 April 2016 data. However, NSIDC is still working on the calibration of the F18 data so temporarily the F18 data will be uncalibrated and using F17 tie points.

On 04/05/2016 a change in the solar panel position to shade the nitrogen tank on board the DMSP F-17 satellite was made. In doing so, the integrity of the vertically polarized 37V channel of the SSMIS was compromised. On 04/13/16 an additional change in the solar panel position was made. This change had improved the problems we were seeing in the 37V GHz channel; however, on April 20, the 37V GHz channel started to produce bad data again. Thus, a decision to use F18 data was made at that time.

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