Sciavalig – 6-8/12/2004

Status of the Atmospheric Chemistry

Instruments onboard Envisat

SCIAVALIG 6–8 December 2004

Rob KoopmanAngelika DehnLidia Saavedra de MiguelRoberta Mantovani

Presented by Paul Snoeij

Sciavalig – 6-8/12/2004

Overview 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

Sciavalig – 6-8/12/2004

Calibration Data Processing Status• 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

Sciavalig – 6-8/12/2004

Operational NRT Data Processing• 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)

Sciavalig – 6-8/12/2004

Off-Line Data Processor Status• 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)

Sciavalig – 6-8/12/2004

1st Full-Mission Data Processing

0

20

40

60

80

100

1205 7 9 11 13 15 17 19 21

Unav %

LRACSCI_NL__0P,C

D-PACSCI_NL__1P,C

D-PACSCI_NL__2P,C

Percentage per cycle, of available data processed

Sciavalig – 6-8/12/2004

Data dissemination

• 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

Sciavalig – 6-8/12/2004

MIPAS Space Segment Status• 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

Sciavalig – 6-8/12/2004

GOMOS Space Segment Status• 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

Sciavalig – 6-8/12/2004

Status of the Envisat Atmospheric Chemistry

Validation

SCIAVALIG 6–8 December 2004

Paul SnoeijEuropean Space AgencyEarth Observation Programmes

Sciavalig – 6-8/12/2004

ACVT Long term validation

• 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.

Sciavalig – 6-8/12/2004

Long term validation sources

• 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.

Sciavalig – 6-8/12/2004

ACVT Long term validation schedule

Sciavalig – 6-8/12/2004

ESABC-2004 Schedule

Sciavalig – 6-8/12/2004