an update: ac-vc total ozone product, toms, omi, omps and...
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AnUpdate:AC-VCTotalOzoneProduct,
TOMS,OMI,OMPSandSAGEIII
G.Labow1,N.Kramarova1,R.D.McPeters2,R.Damadeo3 ,D.Flittner3
1 ScienceSystemsandApplicationsInc.,Lanham,MD,USA2 NASAGSFC,Greenbelt,MD,USA
3 NASALangley
June30,2017AC-VC-CEOSParis 1
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AC-VCObjective:Producea5x5degreepole-to-polemonthlytotalozonemap
Solution:UseMERRA-2asa“SmartInterpolator”
NormalizetoSBUVMODtoremovebiases5degreezonalmeans
ValidateproductusingtotalozoneproductsfromV9TOMS,OMI,NPP,GOME/GOME2,SCIA(ESACCIProduct)andamultitudeofgroundstations.-Underway-PaperwillbepublishedbyFallof2017
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October2008– TotalOzone
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TOMS&OMIV9 Objectives• Simplifythetotalozoneretrieval• ExploitadvantagesofRodgers’OE
– Optimalestimationtotalozoneretrievalusing312.5,317.5,322(OMI/OMPS),331nm
– Provideerroruncertainties(1-σ)foreachretrieval– Extendretrievalsto88deg.SZA– Supplyretrievaloperators(AveragingKernels)– TotalO3fromsumofcoarse(~5.5km)retrievedprofile(OMIonly)
– AdditionalFutureCapabilities(addwavelengths,apriorieasiertoconstruct,TropO3,etc.)
– PaperwillbepublishedbyFall,2017
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Version9ScheduleforRelease
• V9OMI,TOMS/N7tobereleasedthissummer.• V9algorithmpapersubmittedthissummer.• V9OMPSreprocessingbeginsinfall,releasenextyear (note:OMPSV2.1totalozoneproductreleasedlastmonth,usesV8.6algorithm)
• Meteor-3andEarthProbeTOMSwillbeprocessedinthefuture(pendingfundingandtime….)
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Version9TOMS&OMItotalozoneproduct
OMI
Nimbus-7TOMS
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KeychangesinOMPSLimbversion2.5
OMPS-LPv2algorithm
§43UVpairsand17VIStriplets;
§radiancesarenormalizedat65kmforUVand45kmforVISranges;
§Theaerosolcorrectionmoduleisturnedoff
§3UVpairsand1VIStriplets;
§radiancesarenormalizedat55kmforUVand40kmforVISranges;
§IncludetheexplicitaerosolcorrectionbyusingLPaerosolv1;
§ThealgorithmusesrealisticaprioricovariancematricesinsteadofTikhanov regularization.
•AstraylightcorrectionfortheVISwavelengths;
• Sensorpointingerrors[L.Moyetal.,AMT2017];
• Anewcloudheightdetection[Chenetal.,AMT,2016].
OMPS-LPv2.5algorithm
April-May2017:ReprocessingLPdatawiththenew2.5retrievalalgorithmDONE
July-Aug2017: Publicreleaseoftheversion2.5ozoneprofilesTBD8
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9
Tropics Mid-latitude
OMPSLPOzoneretrievals
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10
Relative driftagainstAuraMLSFeb2012- Present
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SAGEIIITypicalOrbit
Moonset
Sunset
Sunrise
Limb Scatter
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• Eventsprocessedinaweeklybatch• Canbeprocessedsoonerwithincreasedproductuncertainty• UtilizingheritageprocessingcodefromSAGEIII/M3M,withupdatesappropriate
forISS• AlgorithmforTransmissionidenticaltoSAGEV7Algorithm
DataAvailabilityTimelineData Processing Level
Description First Data delivery afterCommissioning*
Maximum data latency after first release**
Level 1 Solar Occultation Transmission
6 months 10 days
Level 2 Solar & Lunar Data Products
6 months 14 days
*Product quality shall be at least Beta quality with a goal of provisional quality.**Latency is defined as the maximum time before release of higher order data products after receipt of all data required to produce the data product (e.g., MERRA).
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First-Look O3 Profiles
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Summary:AC-VCTotalozoneproductwillbeupdatedthrough2016andpublishedbyFall2017.Thisobjectiveisnowconsideredtobefinished.Updateeveryyear??
V9TotalozonealgorithmforN7TOMS,OMIandOMPSwillbereleasedshortly.
OMPSLimbV2.5productwillbereleasedbytheendofAugust.
SAGEIIIdatawillbeavailablebytheendoftheyear.