status of the atmospheric chemistry instruments onboard envisat
DESCRIPTION
Status of the Atmospheric Chemistry Instruments onboard Envisat. Rob Koopman Angelika Dehn Lidia Saavedra de Miguel Roberta Mantovani. Presented by Paul Snoeij. SCIAVALIG 6–8 December 2004. SCIAMACHY Calibration Data Processing Status Operational NRT Data Processing Status - PowerPoint PPT PresentationTRANSCRIPT
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