NUMBER 95

DATE: 07/05/91

Sector Processing Center (SPC):

During May, NOA, ESA and JMA processed greater than 99% of A data into B1/B2 data. JMA reported processing 100% of the A data for April. No reports or B2 data have been received from AES since February.

Normal operations were reported by NOA and JMA.

JMA reported loss of the AC data for 23 May because of a problem with their computer system.

ESA reported that operations continued with METEOSAT-4 during May, except for the period from 0830 UTC on 2 May through 1400 UTC on 3 May, when METEOSAT-5 data were collected. An anomaly in the image rectification (re-projection to constant viewpoint) for METEOSAT-5 was detected and appears to be caused by spacecraft dynamics rather than a software error. METEOSAT-4 will continue to provide data until this anomaly is understood and resolved.

CSU reported that METEOSAT-3 is now drifting to a position at 50W longitude (which it should reach by early August) and that planning is underway for NOA to begin collection of its imaging data to supplement the GOES-7 coverage.

Special Area Processing Center (SAPC):

No reports were received.

Satellite Calibration Center (SCC):

BC data were received for GMS-4 for December 90 (IR only) and January 91 and for METEOSAT-4 for December 90 (IR only). Extra BC for METEOSAT-3 for November 90 were also produced, but there are too few data to obtain a reliable normalization. (Images were collected primarily from METEOSAT-4 in late 90, but sometimes images were collected from METEOSAT-3.)

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. NOAA-11 B3 data have been re-calibrated through July 90. We have received preliminary calibration results from six NASA ER-2 flights spanning the lifetime of NOAA-11 (so far). Both these data and ours show what may be a very small drift of calibration, but further tests are being conducted. All NOAA-11 B3 have been delivered to the ICA through 89.

Production of NOAA-10 (preliminary) B3 data has been completed for October 90 through April 91; production is now current. Re-calibration of NOAA-10 B3 data has been completed through June 90; NOAA-10 B3 data have been delivered to the ICA through 89.

Production of METEOSAT (preliminary) B3 data is current.

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

Production of GOES-6 B3 data is completed.

Production of GMS-4 (preliminary) B3 data is current. GMS-3 B3 data for February through June 87 have been re-calibrated to correct an inconsistency of calibration between the SCC and GPC; these data have been delivered to the ICA. GMS-3 B3 data for January - June 89 have been re-calibrated and shipped to the ICA.

The processing software to convert INSAT-1 B2 data into B3 format is nearing completion.

Production of TOVS correlative data is current. Sea ice data for 90 have not yet been received.

C1 data for December 87 have been completed. In addition, C1 data for February through August 87 have been reprocessed with corrected calibrations for GMS-3 and GOES-7 B3 data. All C1 data for February - December 87 have been delivered to the ICA. C2 data for 87 are being processed.

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.