NUMBER 107

DATE: 07/02/92

Sector Processing Center (SPC):

During May, NOA, JMA, and ESA processed greater than 99% of A data into B1/B2 data.

Normal operations were reported by NOA, JMA and ESA.

AES has been repairing processing software after changes in their hardware system and will soon begin processing the backlog of B1/B2 data. They have also been investigating what turned out to be an unusually frequent use of the "rapid scan" mode that NOAA implements during severe weather. A lot of severe weather has been occurring in the past few months in the central US which is degrading the quality of the AC data, collected for calibration monitoring, and of the B2 data.

Special Area Processing Center (SAPC):

No reports were received.

Satellite Calibration Center (SCC):

The SCC received AC data for GOES-7, GMS-4, MET-3 and MET-4 for April and May 92 and for NOAA-11 for April 92. The backlog of AC data for GOES-7 has also been received. They sent BC data to the GPC for GOES-7 for October 91.

Global Processing Center (GPC):

The GPC continued to receive B2 data, BC data and correlative data in a routine manner.

Production of NOAA-11 (preliminary) B3 data is current.

Production of NOAA-12 (preliminary) B3 data is current.

Production of METEOSAT-4 (preliminary) B3 data is current.

Production of GOES-7 (preliminary) B3 data is current.

Production of GMS-4 (preliminary) B3 data is current.

Production of all INSAT-1 (preliminary) B3 data has been completed, covering the period from January 86 through March 89. Work has begun on determining final calibrations.

To document the ISCCP radiance calibrations for users of the same satellite data who do not use the Stage B3 version, the GPC is copying all of the calibration tables from the B3 dataset onto separate data tapes. These tapes, together with a detailed report containing material from the B3 data documentation and describing the calibration and normalization methods and results in detail (summarized in two published papers), will constitute the complete documentation of ISCCP calibrations. This activitiy also allows for a re-copying of the whole B3 data archive to newer, more compact media. Once these calibration tapes are produced, improvements of the calibration of the whole B3 dataset can be made by replacing only these calibration table datasets. Improvements of the calibration and normalization results, where needed, will be part of the re-processing to begin later this year; a new version of the calibration tapes will be issued early next year.

Production of TOVS and the ice/snow correlative datasets is current. The sea ice dataset for 91 has not been received.

Production of C1/C2 data has stopped because the NAVY/NOAA Sea Ice dataset for 91 is not available.

ISCCP Central Archive (ICA):

The ICA continued to receive B1 data from NOA, AES, ESA, and JMA and B3 and C data from the GPC in a routine manner.