NUMBER 78

DATE: 02/02/90

Sector Processing Center (SPC):

During December, NOAA, AES and JMA processed greater than 91% of A data into B1/B2 data. A telex advising the GPC of shipment of December B2 data was received from ESA.

Normal operations were reported by NOAA and JMA.

AES data collection continued to suffer because of the less reliable system that they have been using while their bit synchronizer was being repaired. Repairs have been completed and the synchronizer was installed on 12 December. Data losses occurred on one day because of inadequate operator coverage, on two days because of a failure of the main data disk, and on one day because of a power outage.

CSU reported that INSAT B2 data with eight-times daily frequency have now been delivered to NCAR covering the period from April 88 through March 89. CSU is working on a data format for delivering these data to the GPC, as well as developing a method to normalize radiance calibrations using overlapping observations from METEOSAT and GMS.

Special Area Processing Center (SAPC):

No reports were received.

Satellite Calibration Center (SCC):

New BC data were received for GOES-6 for June, July, October 87 and January, April, July and October 88, for METEOSAT-3 for November 88 and January and March-May 89, and for GOES-7 for April, July and October-November 88 with supplementary results for March, May, June and August 88.

Global Processing Center (GPC):

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

Production of NOAA-11 B3 data is current, meaning these data are now produced as soon as the B2 data are received. Study of the preliminary normalization results for NOAA-11 suggest that the early estimate may be slightly too low; further study is underway to refine the results. Delivery of these data will be delayed until the NASA calibration flight data are obtained for comparison and verification.

The GPC received the missing NOAA-10 B2 data covering the period from December 87 through July 88. Production of NOAA-10 preliminary B3 data has been completed through November 87 and from August through December 88. NOAA-10 VIS calibration has shown no drift over the first year of data; in contrast, NOAA-11 appears to drift somewhat more rapidly than NOAA-9.

All B3 data for GOES-6 have been produced through Jan 89. BC data were received covering 87 and most of 88, so that final calibration of these data can commence.

Production of B3 data for GMS has been completed through July 88, skipping those months for which replacement B2 data are needed.

Production of B3 data for METEOSAT has resumed and is complete through March 88.

The GPC received sea ice data covering 1988; production of the combined ice/snow correlative data set has commenced.

C1 data for June and July 85 have been completed. Production of C1 data for August and September 85 is underway.

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.