NUMBER 81
DATE: 05/04/90
Sector Processing Center (SPC):
During March, NOAA, ESA, AES and JMA processed greater than 97% of A data into B1/B2 data.
Normal operations were reported by NOAA, ESA, JMA and AES.
AES reported that B1 shipments to the ICA have been resumed.
Special Area Processing Center (SAPC):
No reports were received.
Satellite Calibration Center (SCC):
New BC data were received for GMS-3 for November 88 and January 89. The SCC reports completing the
change to the new IR translation table for GOES-7 data.
Global Processing Center (GPC):
The GPC continued to receive B2 data and correlative data in a routine manner.
Re-calibration of the IR radiances from NOAA-9 for Oct 86 and for the period Oct 87 through Oct 88 is completed. Comparison of the Mar 87 B3 data for NOAA-9 with those for NOAA-10 suggested that no calibration change was needed. A final comparison of the Channel 1 calibration trend obtained from the GPC analysis to the results of another ER-2 calibration flight in Nov 88 shows excellent agreement: using the trend together with the absolute calibration obtained in Oct 86 produces a calibration in Nov 88 that is within 2% of the ER-2 results, which are themselves uncertain by about 6-9%.
Production of NOAA-11 (preliminary) B3 data is current.
Production of NOAA-10 (preliminary) B3 data is current. Normalization of the Channel 1 and Channel 4 radiances has been completed. The brightness temperatures measured by NOAA-10 are systematically 1 K warmer than NOAA-9. The first analysis also suggests a small gain difference; however, because of the difference in diurnal phase between these two satellites, further investigation is warranted. Re-calibration and delivery of NOAA-10 B3 will begin later this month.
Production of GOES-6 (preliminary) B3 data is completed. Re-calibration of GOES-6 B3 data started with adjusting the IR calibration to take account of the change in NOAA-9 calibration in Oct 86.
The B3 formatter code for AES GOES-7 data has been completed and is undergoing testing; production of GOES-7 (preliminary) B3 will commence later this month.
Production of B3 data for GMS-3 is on hold awaiting information about the nominal calibration of GMS-4 (which became operational in Dec 89) and receipt of replacement B2 data for six months in 87 and 88.
Production of (preliminary) B3 data for METEOSAT is current. All replacement B2 data, except for Aug and Sep 89 have been received and processed into B3 format. (Notice of shipment of these last two replacement data sets has been received from ESA.) Production of B3 data beyond Jan 90 is on hold awaiting clarification of calibration for MET-3, which replaced MET-4 as the operational satellite.
After extension of the TOVS daily frequency survey into mid-90, we have added this survey software to the regular production system. Production of TOVS correlative data has resumed in mid-89 and should be current by the end of this month.
C1 data for December 85 and January 86 have been completed. Production of C1 data for February and
March 86 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.
The health of GMS-4, METEOSAT-3, GOES-7, NOAA-10 and NOAA-11 remained good. Anomalous behavior
of METEOSAT-4 is being investigated. Launch of NOAA-D has been indefinitely postponed because of a
problem with the reaction control system.
Beginning delivery of INSAT B2 data.
Delivering replacement GMS B1 data for 1987 to the GPC.
Delivering backlog of NOAA-10 B2 data for October 89 through February 90 to the GPC.
Completing BC data for 1989.
Delivering all B3 data for 1987 and 1988 to the ICA.
Delivering snow and sea ice data for 1989 to the GPC.
Completing C1 data for 1986.
Delivering C2 data for 1983, 1984 and 1985.