The second meeting of the JSC Working Group on Data Management for Radiation Projects of the World Climate Research Program (ninth meeting of the WGDM for ISCCP) was held near Lannion, France, hosted by the SCC. Some highlights of reports and discussions follow.

(1) ESA (SPC for METEOSAT) reported plans for MET-3 to remain at 50W until the end of 92 and then move to either 78W or 95W in early 93, depending on the health of GOES-7. Launches of MET-6 and MET-7 (same as MET-4 and MET-5) are planned for fall 93 and end of 95, respectively. An option exists to build one more satellite in this series before beginning a new series near the end of the decade.

(2) JMA (SPC for GMS) reported plans for GMS-5 which is scheduled for launch in early 94; GMS-5 will have an extra spectral channel with a central wavelength of 6.7 m.

(3) AES (SPC for GOES-EAST) reported that the significant difficulties with changing telemetry and computer systems and replacement of key personnel have been almost entirely overcome and data processing is returning to normal.

(4) CSU (SPC for GOES-WEST) reported completion of the re-formatting and delivery to the GPC of INSAT data, covering the period from January 86 - March 89. Changes to antenna hardware and software were underway to allow more reliable receipt of MET-3 data to begin by July 92.

(5) NOAA (SPC for NOAA polar orbiters and ICA) reported that launch of NOAA-I to replace NOAA-11 is planned for September 92. A new catalog of ISCCP datasets was issued in May 92. During the past two years, 39 requests for ISCCP data (364 tapes) were filled.

(6) The SCC (CMS) reported automation and refinement of its normalization procedures and that there is now no backlog of normalization. Consequently, resources are being used to investigate some remaining puzzles and to look at the calibration results in more detail. A paper documenting the SCC and GPC calibration corrections for the geostationary satellites has been accepted for publication in the Journal of Atmospheric and Oceanic Technology.

(7) The GPC (NASA GISS) reported completion and delivery of Stage B3 data through June 91 and of Stage C1/C2 data through December 90. A CD-rom containing 7.5 years of C2 data has been produced by NASA GSFC and is now available. A paper documenting the GPC calibration corrections for the polar orbiter appeared in early 92 in the International Journal of Remote Sensing. A paper describing the ISCCP cloud detection algorithm and its validation has been submitted for publication in the Journal of Climate.

(8) Plans for refinement and correction of all the ISCCP datasets were discussed. Major objectives of this re-processing are to eliminate some small remaining calibration anomalies, to correct some small errors in contents, to refine the polar cloud analysis, to improve the radiative model treatment of ice clouds, to remove a small satellite zenith angle dependence in the results, and to improve the reported statistics in Stage C1/C2 data. These changes will be made this summer and require about one year to re-process the first eight years of data. Also discussed were several ideas for additional data products, but no firm decisions were made about these other ideas.

(9) Other radiation projects were reviewed. Of special note are: (a) the majority of ERBE datasets are now available from NASA archives, (b) the Surface Radiation Budget project is ready to begin experimental production of surface solar insolation values later this year and continues studies towards improving algorithms, especially for surface downwelling infrared fluxes, (c) arrangements are going forward to begin a baseline network of surface radiative flux measuring stations and an experiment was completed (as part of the second FIRE Cirrus experiment) to test calibrations of infrared instruments.

The health of GMS-4, METEOSAT-3 (at 50 W), METEOSAT-4, METEOSAT-5, GOES-7, NOAA-11, and NOAA-12 remained good. GOES-7 has been moved to 112 W where it is planned to remain, with METEOSAT-3 providing coverage of the eastern sector of the Americas.

Stage B3: July 83 - June 91

Stage CD: July 83 - December 90

Stage C1: July 83 - December 90

Stage C2: July 83 - December 90

Correcting GOES-7 B2 data for July 91 and August 91 and delivering the backlog of B1/B2 data for December 91, January, February, March and April 92 to the GPC.

Delivering sea ice correlative data for 91 to the GPC.

Delivery backlog for B3 data = 4 months (with respect to planned schedule). B3 data for 96 months have been archived.

Delivery backlog for C1/C2 data = 10 months (with respect to planned schedule). C1 data for 90 months have been archived.