CERES Instrument Status Flight Models 1 -5 (FM1 – …...• With the new solar raster scan...
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CERES Instrument Status Flight Models 1 -5 (FM1 – FM5) Susan Thomas CERES Instrument Working Group Team CERES Science Team Meeting NASA Langley Research Center Hampton, Virginia May 15, 2018
Transcript of CERES Instrument Status Flight Models 1 -5 (FM1 – …...• With the new solar raster scan...
CERES Instrument Status
Flight Models 1 -5 (FM1 – FM5)
Susan Thomas CERES Instrument Working Group Team
CERES Science Team Meeting NASA Langley Research Center
Hampton, Virginia May 15, 2018
InstrumentWorkingGroup
Science-SusanThomas–PhillipHess
MohanShankarNathanielSmithNitchieSmith
Z.PeterSzewczykRobertWilson
DataManagement-DeniseCooper--DaleWalikainen-A.ThomasGrepiotis
MarkTimcoeDianneSnyder
InstrumentOperationsB.MikeTafazoli
ChristopherBrownJohnButler
AlexanderThickstunAdamHornCarolKelly
JanetDanielsWilliamEdmondsJamesDonaldsonJamesBailey
CERESInstrumentWorkingGroup
CERESInstrumentOperations:FM1-5
CERESInstruments,FlightModels1-5(FM1–FM5)areprimarilyoperatingincross-trackmode.
AnewcalibrationsequencewasdevelopedanduploadedtoallCERESinstruments.ThenewsequencewillutilizetheuseofShortwaveCalibrationsourcethroughonecycleduringinternalcalibration.
Inter-comparisonOperationsforSummer2018CERESTerra/FM1–S-NPP/FM5:May1–July31,2018.CERESTerra/FM1–JPSS-1/FM6:May1–July31,2018.CERESTerra/FM1–Aqua/FM3:June1–June30,2018
CERESInstrumentWorkingGroup
CERESInstrumentWorkingGroup
TERRA&AQUAINSTRUMENTSTATUS[CERESFM1–FM4]
TerraCERESFM1&FM2InstrumentCalibration
CERESInstrumentWorkingGroup
• IncreaseinresponseforTotalandWindowsensors• DropinresponseforSWsensors.
AquaCERESFM3&FM4InstrumentCalibration
CERESInstrumentWorkingGroup
• IncreaseinresponseforTotalandSWsensors.• WindowsensoronFM3showedadropwhereasFM4responseshow
slightupwardtrend,similartoFM1andFM2instruments.
TerraFM1&FM2SolarCalibrationResults
CERESInstrumentWorkingGroup
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
10/99 10/01 10/03 10/05 10/07 10/09 10/11 10/13 10/15 10/17
Sen
sor
resp
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se %
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Terra Solar Calibration Flight model 1
short total
-3
-2
-1
0
1
2
3
4
5
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10/99 10/01 10/03 10/05 10/07 10/09 10/11 10/13 10/15 10/17
Sen
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resp
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se %
ch
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Date
Terra Solar calibration Flight model 2
total
short
• MirrorAttenuatorMosaics(MAMs)onFM1&FM2instrumentsshowedhugethroughputchangeinfirsttwoyearsofMission.
• WiththenewsolarrasterscancalibrationsequencestartingDec2005,theMAMsshowedslowerrateofchange.
AquaFM3&FM4SolarCalibrationResults
CERESInstrumentWorkingGroup
-2.0
-1.0
0.0
1.0
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04/02 10/03 04/05 10/06 04/08 10/09 04/11 10/12 04/14 09/15 03/17
sen
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resp
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ch
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AQUA Solar calibration Flight Model3
total short
-2.0
-1.0
0.0
1.0
2.0
3.0
04/02 10/03 04/05 10/06 04/08 10/09 04/11 10/12 04/14 09/15 03/17
sen
sor
resp
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se %
ch
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Date
AQUA Solar calibration Flight Model 4
short
total
• MirrorAttenuatorMosaics(MAMs)onFM3&FM4instrumentsalsoshowedincreaseinthroughputforfirst18monthsinMission.
• Thetotalsensorresponsesonbothinstrumentsshowedadropof2percentafterthenewsolarrasterscancalibrationsequencestartedinDec2005.
• SWsensoronFM3instrumentshowedaboutonepercentdropinresponse.
TERRA/AQUAEdition4GAINandSRF
CERESInstrumentWorkingGroup
• Edition4GainsandSpectralResponseFunctions(SRF):TerraandAqua-StartofMissiontoJanuary2018• ThemonthlyGainvaluesfortheTotal,Windowand
Shortwavesensorsarebasedonin-flightICMcalibrations.
• Withbothinstrumentsonthespacecraftoperatingincrosstrackmode,thecurrentmonthlySRFcorrectionsforSWsensorremainconstant.
• SRFcorrectioninSW/TOTsensoriscalculatedmonthlyusingAll-skyOceanandLandmeasurementsofLWandWindowsensors.
EDITION-4RESULTS:TERRA&AQUASWSENSORS
CERESInstrumentWorkingGroup
EDITION-4Results:TERRA&AQUALW_DayFlux
CERESInstrumentWorkingGroup
EDITION-4Results:TERRA&AQUALW_NightFlux
CERESInstrumentWorkingGroup
CERESInstrumentWorkingGroup
S-NPP/CERESFM5INSTRUMENTSTATUS
S-NPPCERESFM5InstrumentCalibration
SensorgaincorrectionsbasedonICMcalibrationsareappliedtoEdition1dataproducts.
CERESInstrumentWorkingGroup
ICMcalibrationsshowaresponseincreaseof0.5%forTotalandWindowsensors.SWsensorshowsaninitialdropof0.2%Solarcalibrationresults:SWsensorshowsslightrisingtrend.Totalsensorissteady
-1.0
-0.5
0.0
0.5
1.0
1/4/12 1/3/13 1/4/14 1/4/15 1/5/16 1/4/17 1/5/18 S
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resp
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Perc
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M5
Date
S-NPP Flight model 5 solar calibration
short total
S-NPP/CERESFM5InstrumentCalibration
CERESInstrumentWorkingGroup
ComparisonofcalibrationresultsfromSWICS(Level1)andMAMshowedsimilartrendsintheSWsensor.
-0.4
-0.2
0.0
0.2
1/4/12 10/2/12 7/1/13 3/30/14 12/27/14 9/25/15 6/23/16 3/22/17 12/19/17
Sens
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nse,
Per
cent
cha
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Date
NPP Flight model 5 solar+internal calibration
short swiclev1
S-NPP/CERESFM5ValidationResults
CERESInstrumentWorkingGroup
Tropical Mean (TM): Nadir LW radiance for All-sky Ocean in ± 20 deg Latitude. Changes in SW/TOT channel is monitored through Day-Night (DN) Difference comparison between LW and Simulated LW from Window measurements. DN Difference comparison of FM3 Edition4 with FM5 Edition1 results show slight increase in FM5 results, which can attribute to change in SW/TOT sensor.
-1
0
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Oct-11 Oct-12 Oct-13 Oct-14 Oct-15 Oct-16 Oct-17
(Day-Night)Watts/m2str
NadirTropicalMeanFM5Edition1
TOT-SW LW_regr Difference Edition1-CV
-1.0
-0.8
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Oct-11 Oct-12 Oct-13 Oct-14 Oct-15 Oct-16 Oct-17
DifferencesinTM(Day-Night)Wattsm-2sr-1
NadirTropicalMeanDifferences
FM3_Ed4
FM5_Ed1
CERESS-NPP/FM5–Aqua/FM3Comparison
CERESInstrumentWorkingGroup
TropicalMeanLWRadiances(DayandNight)showminimaldifferences.GlobalFluxDifferencesshowthatFM5SWmeasurementsarehigherby~1.5Wm-2andLWmeasurementslowerby~0.5Wm-2.
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1
2
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Oct-11 Oct-12 Oct-13 Oct-14 Oct-15 Oct-16 Oct-17
Wattsm-2
ES4AllSkyFluxDifferences(FM5_Edition1-FM3_Edition4)
SW_All_Sky LW_All_Sky
-1.0
-0.8
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Oct-11 Oct-12 Oct-13 Oct-14 Oct-15 Oct-16
TropicalMeanLWRadiance.Wattsm-2sr-1
LWTropicalMeanDifferences(FM5_Edition1-FM3_Edition4)
Day
Night
S-NPP/FM5,TERRA&AQUACOMPARE:SW
CERESInstrumentWorkingGroup
SWFluxanomalyforallscenesshowsimilartrendforallinstruments.S-NPP/FM5SWdifferencebetweenTerra/FM1andAqua/FM3remainstable.
S-NPP/FM5,TERRA&AQUACOMPARE:LWDay
CERESInstrumentWorkingGroup
LW-DayFluxanomaliesfromthe3instrumentsshowsimilartrend.DifferencebetweenS-NPP/FM5withFM1andFM3LW_DayFluxshowslightincreaseintrend.
S-NPP/FM5,TERRA&AQUACOMPARE:LWNight
CERESInstrumentWorkingGroup
LW-NightFluxanomaliesshowsimilarpositivetrendonall3instruments.DifferencecomparisonofS-NPP/FM5withFM1andFM3measurementremainstable.
S-NPP/FM5Edition2Activities
CERESInstrumentWorkingGroup
• TheintercomparisonresultsbetweenS-NPP/FM5andAqua/FM3showedthatSWradiancesarehigherforFM5instrument.
• TheShortwaveradiancedifferencebetweenFM5andFM3forClearOceanscenesisrelativelyhigherthanSWradiancedifferenceforAll-skyscenesbetweentwoinstruments.
• Re-evaluateStartofmissionSWSpectralResponseFunction(SRF)forFM5instrumenttoaddresstherelativedifferencesforvariousscenetypes.
• TheSWradiancesforFM5instrumentwillgetcalculatedwiththenewSWSRF.
• IntercomparisonwithFM3SWradiancetodeterminetheoverallscalingfactorforFM5tobringNPP/FM5andAqua/FM3instrumentstoacommonradiometricscale.
• TherevisedStartofMissionSRFandradiometricscalingfactorwillgetappliedinNPP/FM5Edition2processing.
SUMMARY
CERESInstrumentWorkingGroup
• TheTerraandAquaInstruments’GainsandSpectralResponseFunctionsforEdition4processingweredeliveredthroughJanuary2018.ValidationresultsofTerra/AquaEdition-4datashowconsistenttrendsinSWandLWmeasurementamongthethreeCERESinstruments(FM1–FM3).
• S-NPP/FM5calibrationresultsarewithintheexpectedrange.SWsensorresultsshowedsimilartrendsforMAMandSWICSLevel1calibrations.
• S-NPP/FM5inter-comparisonwithAqua/FM3showedSWmeasurementsarehigherforFM5instrumentincomparisonwithFM3.
• CERESFM5StartofMissionSpectralResponseFunction(SRF)isbeingreevaluatedtoaddressthedifferencesbetweenClearoceanandAll-skyscenesobservedininter-comparisonstudiesbetweenNPP/FM5andAqua/FM3.
• NPP/FM5StartofMissionSRFchangesandtheradiometricscaledifferencewithAqua/FM3willbeincludedinNPP/FM5Edition2process.
BACKUPSLIDES
Climate Data Record Continuity
CERES/RBI Flight Schedule
We now have over 69 years of flight experience with the CERES instruments
97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21
MissionswithERBObservationsPFM FM-1,2 FM-5 FM-6 RBI Sensors:
CY:
FM-6
RBI
FM-5
TRMM (11/97)
Terra (12/99)
Aqua (5/02)
NPP (10/11)
JPSS-1 (11/16)
JPSS-2 (11/21)
FM-3,4
Initial Studies/Reqmts Development
Sensor Fab, Assembly, Test
Sensor in Storage
Spacecraft I&T
Nominal Mission Lifetime
Operational Lifetime
Direct compare of FM5 and FM3
(FM5-FM3)/FM5
FM5 Radiance [W m-2 sr-1]
Relative Error [%]
α-confidence [95%]
Number of samples
Shortwave 79 /85 /77 /81 /80 3.3 / 2.7 / 1.0/ 1.7 /2.6 .4 /.3 /.4 /.4 /.3 65/86/91/85/91
LW daytime 76 /74 /77 /77 /76 -1.1 /-1.3 /-0.6 /-0.9 /-1.0 .1 /.1 /.1 /.1 /.1 69/89/91/85/91
LW nighttime 66 /65 /68 /66 /66 -0.3 /-0.3 /0.0 /-0.2 /-0.3 .1 /.1 /.1 /.1 /.1 87/105/106/105/111
FM5–FM3 “simultaneous Earth” observation 2012/2013/2014/2015/2016 ΔTime < 1min; ΔRAZ < 10°; ΔVZA <10°
Shown differences are statistically significant
• Shown differences are computed as “average of differences” to avoid error cancellation
All-sky
