NUMBER 61

DATE: 09/02/88

Sector Processing Center (SPC):

During July, ESA and NOA collectively processed greater than 92% of A data into B1/B2 data. AES processed 83% of A data into B1/B2 data.

Normal operations were reported by ESA, AES and NOA.

AES reported a change of the AC sector to a region of 10 about the subsatellite point (from -10 to 10 latitude and from 65 to 85 west longitude) starting on 12 July 1988. This change is in response to a request from the SCC for a larger area in the AC sector.

ESA reported that the commissioning METEOSAT-P2 to replace METEOSAT-2 caused the loss of some images in July.

No reports were received from CSU and JMA.

Special Area Processing Center (SAPC):

No reports were received.

Satellite Calibration Center (SCC):

No report was received.

Global Processing Center (GPC):

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

A final report on the new B2 format was sent to JMA. Processing code for this B2 data set has been constructed and tested. The GPC received from JMA a new set of IR calibration tables, completely replacing the tables for the whole GMS data set from July 83 through February 87. These new tables eliminate the spurious diurnal cycle in IR calibration that was most noticeable during ecllipse seasons. In March 87 a new operational procedure was implemented that removes this cycle for all subsequent data. The GPC will reprocess all of the GMS B3 data tapes (from July 83 through December 85) to replace the calibration tables; any needed adjustments in the normalization coefficients will be made based on the relation between the old and new tables for the diurnal phase corresponding to the polar orbiter overpass.

NOAA-9 B3 re-calibration has been completed and the data delivered to the ICA through June 86; however, the B3 data for October and November 86 and for June and July 87 for the FIRE data processing were also completed and will be delivered in proper sequence. The October 86 IR calibration anomaly is still being investigated.

New code and procedures have been developed for the inspection of the B3 data to detect small, short-term calibration anomalies. Early attention is being given to the particular data sets that are scheduled for cloud analysis in the near future to minimize the delay. All data for July 83, January 84, October and November 86, June and July 87, and April 85 have been re-inspected.

GOES-6 and GMS-3 B3 through December 85 were delivered to the ICA (delivery of October 85 GMS B3 awaits replacement of one week of data). GOES-6 B3 was produced for all of 86 as well, but will not be delivered until completion of the calibration re-inspection. MET-2 B3 has been produced and delivered through October 85; production continues.

Production of TOVS data has been completed through June 88; however, some data are missing for June 86, July 87 and Aug 87. Once these data have been obtained and processed, TOVS data for 86 and 87 will be delivered.

C1 data for July 83 were delivered to the ICA. Delivery of the January 84 C1 data is delayed to correct the IR calibration of GOES-6. Special FIRE C data sets from NOAA-9 for October and November 86 have been completed, using the new radiance calibrations. Special FIRE data sets from NOAA-9 for June and July 87 are in production; production of C1 for April 85 has also started.

ISCCP Central Archive (ICA):

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