Status of the Atmospheric Chemistry Instruments onboard Envisat

1. Status of the Atmospheric Chemistry Instruments onboard Envisat Rob KoopmanAngelika DehnLidia Saavedra de MiguelRoberta Mantovani Presented by Paul Snoeij SCIAVALIG 6–8 December 2004

2. SCIAMACHY Calibration Data Processing Status Operational NRT Data Processing Status Off-Line Data Processor Status Full-Mission Data Processing Status Validation Data Processing Status Data Dissemination MIPAS GOMOS ACVT Long Term Validation Overview

3. 2002 ,2003, 2004 recalibration completed 2004 forward calibration with IECF operational since 8 May 2004 Important improvements to calibration are part of the current processor improvement cycle. For recalibration, a dedicated chain is under development Recalibration will also involve use of a restituted attitude file to correct mispointing Calibration Data Processing Status

4. Data Processor IPF 5.04 : bug-fixed version of 5.01, sharing exactly the same Algorithm Specification (DPM L1-2C/L2-2A, IODD L1-5A/L2-3C, Product Specification 3H). Processor Configuration Key Data Nadir 3.0, Limb 2.4 Products from the Infra-Red channels are part of the current Level 1B improvement cycle (baseline specification nearly completed) Operational NRT Data Processing

5. Current Processor version 2.5 IODD 4E (November 2004), Product Specification Document 3J (December 2004) Integration has begun after above delivery Target date for operations: Important improvements to level 2 off-line processing are part of the current Level 2 improvement cycle (baseline specification nearly completed) Off-Line Data Processor Status

6. 1st Full-Mission Data Processing Percentage per cycle, of available data processed

7. Dissemination of level 1 and level 2 via nominal channels NRT Kiruna: ftp-ops.pdk.envisat.esa.int NRT Esrin: ftp-ops.pde.envisat.esa.int (Reprocessed) Off-line:ftp-ops.de.envisat.esa.int U/P: scia2usr / scia2usr Data dissemination

8. Nominal MIPAS operations have ceased in March 2004 A team involving ESA, Instrument Prime, and Expert Support has been formed. The team defined dedicated investigations. Numerous tests have been executed between March and November, including pre-operational modes. No anomaly-free operations mode has been found thus far, but several modes involve low risk to the instrument. An Anomaly Review Board meeting is held on 7 December to review the future operations scenario. Generalisations to the data processor are currently being implemented to allow processing of the various modes MIPAS Space Segment Status

9. The instrument generally operates reliably, since the operations have been transferred to the redundant electronics on 17 July 2003 The CCD detector performance sensitivity to radiation impact has remained stable. The leakage current trend has remained stable. All other subsystems (in particular tracker) show performance that meets and exceeds requirements GOMOS Space Segment Status

10. Status of the Envisat Atmospheric Chemistry Validation Paul Snoeij European Space Agency Earth Observation Programmes SCIAVALIG 6–8 December 2004

11. Fill in the gaps not covered during the main validation phase. To monitor performance degradation. Regular, optimised, repetition of the essential elements of the main validation. The long-term validation has to be continued during the lifetime of the instruments. ACVT Long term validation

12. Long term validation is performed by using ground-based instruments -> TASTE & EQUAL airborne / balloon instruments -> ESABC satellite instruments -> Univ. of Bremen A set of ‘standard’ stations and campaigns have been defined to monitor the operational product quality. Apart from the ‘standard’ set, also well-defined measurement campaigns are defined. Long term validation sources

13. ACVT Long term validation schedule

14. ESABC-2004 Schedule