Sciavalig – 6-8/12/2004
Status of the
Atmospheric Chemistry
Instruments onboard
Envisat
SCIAVALIG 6–8 December 2004
Rob Koopman
Angelika Dehn
Lidia Saavedra de Miguel
Roberta 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