landsat 8 oli and tirs calibraon updates and trends for
TRANSCRIPT
![Page 1: Landsat 8 OLI and TIRS Calibraon Updates and Trends for](https://reader033.vdocuments.net/reader033/viewer/2022052722/628f0012003bab59b161c717/html5/thumbnails/1.jpg)
Aug242017The26thConferenceonCharacteriza8onandRadiometric
Calibra8onforRemoteSensing(CALCON) 1
Landsat8OLIandTIRSCalibra3onUpdatesandTrendsforthePeriod
of4YearofOpera3onRavivLevy,JuliaBarsi,BrianMarkham
Specialthanksto:LawrenceOng,MaJMontanaro,AaronGerace,USGScalvalCrew(RonMorfiJ,EsadMicijevic,CodyAnderson),VicariousCalgroups(UofA:JeffCzapla-MyersandNikAnderson,SDSU:MorakotKaewmanee,LarryLeigh,DennisHelder,RIT:Nina
RaquenoJPL:SimonHook)
![Page 2: Landsat 8 OLI and TIRS Calibraon Updates and Trends for](https://reader033.vdocuments.net/reader033/viewer/2022052722/628f0012003bab59b161c717/html5/thumbnails/2.jpg)
Aug242017The26thConferenceonCharacteriza8onandRadiometric
Calibra8onforRemoteSensing(CALCON) 2
Outline• Background– Whathadhappenedsofar– On-orbitcalibra3onsmethods
• OLI–trends– Rela3vegains– Absolutegains
• TIRS–trends– Absolutegains– Calibra3onError–latestresults
• Newuniformityevalua3onmethodforOLIandTIRS• Summaryandfuturework
![Page 3: Landsat 8 OLI and TIRS Calibraon Updates and Trends for](https://reader033.vdocuments.net/reader033/viewer/2022052722/628f0012003bab59b161c717/html5/thumbnails/3.jpg)
Aug242017The26thConferenceonCharacteriza8onandRadiometric
Calibra8onforRemoteSensing(CALCON) 3
Background• OLIisinthemiddleofits4thyearinorbit• TIRSpasseditsofficialdesignlife3meby1.5years• NoChangestoSNRperformance• Wereportedduringthisperiodabout:
– 6updatestoUSGSLandsatGroundProcessingSystem– 14Calibra3onNo3cespublishedintheUSGSsite(onlyabout⅓ofthoseimpactradiometricupdates)– 2safeholdsevents– 1majorhardwareissue(notincludingstraylight)24calibra3onparametersreleasesinaperiodof18quartersOnMay312017theobservatorypassedthe1stMillionscenes.
![Page 4: Landsat 8 OLI and TIRS Calibraon Updates and Trends for](https://reader033.vdocuments.net/reader033/viewer/2022052722/628f0012003bab59b161c717/html5/thumbnails/4.jpg)
Aug242017The26thConferenceonCharacteriza8onandRadiometric
Calibra8onforRemoteSensing(CALCON) 4
Subsetofmajorevents• 2013events
– 1stSafeholdSep192013(ahtudecontrolanomalyfollowingSpecialLunarcollects)– OLIandTIRScalibra3onupdates– TIRSoffsetupdate
• 2014events– 2ndSafeholdApril292014(ahtudecontrolanomalyfollowingSpecialSolarDiffusercollectduringannular
eclipse)– Increasetonumberofscenecollectedperday– TIRSSSMencoderelectronicscurrentissueisdiscovered(SideA)– Radgainsupdate–reanalysisofprelaunchdataandshiiingtoReflectancebasedcalibra3onforOLI– TIRSBiasstraylight1stcorrec3onaJempt–applyingfixedoffsetcorrec3on.
• 2015events– March2TIRSelectronicschangedtoSideBforcingCPFupdatetorecalibrateTIRSinApril– Calibra3onupdate–mainlytochangeandrevalidateTIRSsideBparameters.– Oct-NovTIRSSSMencoderissuerepeatsinSideBforcingchangetonominalopera3onconceptofTIRS–impac3ngcalibra3onsdutycycle
• 2016&2017events– Noon-orbiteventsmainlyprocessingupdated– Collec3on-1updates(CA,BluebandsarecorrectedfortrendinresponseandnewTIRSstraylightcorrec3on)– March2017en3rearchiveisprocessedwithCollec3on-1processing.
![Page 5: Landsat 8 OLI and TIRS Calibraon Updates and Trends for](https://reader033.vdocuments.net/reader033/viewer/2022052722/628f0012003bab59b161c717/html5/thumbnails/5.jpg)
Aug242017The26thConferenceonCharacteriza8onandRadiometric
Calibra8onforRemoteSensing(CALCON) 5
On-orbitcalibra3onTheresourcesare:InstrumentBuild-in
OLI– SolarDiffuser(Absolute,Uniformity,Non-linearity,Stability)– Lamp(Dailytrendofrela3vechanges)– ShuJer(offsetcorrec3ons)
TIRS– Blackbody(trackchangestoAbsolute,Stability,Uniformity,Non-linearity)– Spaceview(offsetcorrec3ons)
Externalobserva3ons:– Lunar(monthlytrendofrela3vechanges,Straylight,contamina3on)– Vicarious–Calsites(automated+/-4%err)– PIC-Sites– Allearth-collectsarchive(HistogramandOverlapstatsanalysis)– Otherspecialcollects
![Page 6: Landsat 8 OLI and TIRS Calibraon Updates and Trends for](https://reader033.vdocuments.net/reader033/viewer/2022052722/628f0012003bab59b161c717/html5/thumbnails/6.jpg)
Aug242017The26thConferenceonCharacteriza8onandRadiometric
Calibra8onforRemoteSensing(CALCON) 6
OLIOn-orbitshorttermstability• Variabilityover3meforallbands
00.010.020.030.040.05
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5
variability[%
]
timesincelaunch[years]
RelativeGainVariabilityBetweenConsecutiveDiffuserAcquisitions
CA Blue Green Red NIR SWIR1 SWIR2 Cirrus Pan
PlotcourtesyofJuliaBarsi
![Page 7: Landsat 8 OLI and TIRS Calibraon Updates and Trends for](https://reader033.vdocuments.net/reader033/viewer/2022052722/628f0012003bab59b161c717/html5/thumbnails/7.jpg)
Aug242017The26thConferenceonCharacteriza8onandRadiometric
Calibra8onforRemoteSensing(CALCON) 7
OLIOn-boardcalibratortrends:CA
0.985
0.99
0.995
1
1.005
1.01
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
Respon
seRela*
veto
Mission
Day75
TimeSinceLaunch[years]
OLICABand1Trends:BandAverage
s,mlamp(working) s,mlamp(backup) s,mlamp(pris,ne) solarpanel(working) solarpanel(pris,ne) lunar GainModel
PlotcourtesyofJuliaBarsi
![Page 8: Landsat 8 OLI and TIRS Calibraon Updates and Trends for](https://reader033.vdocuments.net/reader033/viewer/2022052722/628f0012003bab59b161c717/html5/thumbnails/8.jpg)
Aug242017The26thConferenceonCharacteriza8onandRadiometric
Calibra8onforRemoteSensing(CALCON) 8
OLIOn-boardcalibratortrends:Blue
0.985
0.99
0.995
1
1.005
1.01
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
Respon
seRela*
veto
Mission
Day75
TimeSinceLaunch[years]
OLIBlueBand2Trends:BandAverage
s,mlamp(working) s,mlamp(backup) s,mlamp(pris,ne) solar(working) solarpanel(pris,ne) lunar GainModel
PlotcourtesyofJuliaBarsi
![Page 9: Landsat 8 OLI and TIRS Calibraon Updates and Trends for](https://reader033.vdocuments.net/reader033/viewer/2022052722/628f0012003bab59b161c717/html5/thumbnails/9.jpg)
Aug242017The26thConferenceonCharacteriza8onandRadiometric
Calibra8onforRemoteSensing(CALCON) 9
OLIOn-boardcalibratortrends:SWIR2
0.985
0.99
0.995
1
1.005
1.01
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
Respon
seRela*
veto
MIssion
Day75
TimeSinceLaunch[years]
OLISWIR2Band7Trends:BandAverage
s,mlamp(working) s,mlamp(backup) s,mlamp(pris,ne) solar(working) solarpanel(pris,ne) Lunar
PlotcourtesyofJuliaBarsi
![Page 10: Landsat 8 OLI and TIRS Calibraon Updates and Trends for](https://reader033.vdocuments.net/reader033/viewer/2022052722/628f0012003bab59b161c717/html5/thumbnails/10.jpg)
Aug242017The26thConferenceonCharacteriza8onandRadiometric
Calibra8onforRemoteSensing(CALCON) 10
OLIVicariousCalibra3on• UniversityofArizonaRadCaTSmeasurementsofRailroadValley(±4%)• SouthDakotaStateUniversitymeasurementsoflargegrassfieldin
Brookings,SD(±7%)
0.9
0.95
1
1.05
1.1
0 1 2 3 4 5 6 7 8
RatioofTOASpectralRadiance
(measured/OLI)
Band
OLIVicariousResultsRe=lectanceCalibration
RadCaTS/OLI(13) SDSU/OLI(20)
0.9
0.95
1
1.05
1.1
0 1 2 3 4 5 6 7 8
RatioofTOASpectralRadiance
(measured/OLI)
Band
OLIVicariousResultsSpectralRadianceCalibration
RadCaTS/OLI(13) SDSU/OLI(20)
PlotcourtesyofJuliaBarsi,JeffCzapla-Myers,MorakotKaewmanee
![Page 11: Landsat 8 OLI and TIRS Calibraon Updates and Trends for](https://reader033.vdocuments.net/reader033/viewer/2022052722/628f0012003bab59b161c717/html5/thumbnails/11.jpg)
Aug242017The26thConferenceonCharacteriza8onandRadiometric
Calibra8onforRemoteSensing(CALCON) 11
TIRSLongTermStability:Responsivity• Instrumentresponsivitycalculatedfromblackbodyand
deepspaceacquisi3ons• Responsivityindicatessomedegrada3onover3me,but
behaviorchangedwithelectronicsswitch
-0.4-0.3-0.2-0.10
0.1
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5
ResponsivityChange[%
]
TimeSinceLaunch[years]
TIRSResponsivityMetricascalculatedfromper-orbitcalibrationcollects
Band10BA Band11BA SideBswitch
Band10:0.21%peryear
PlotcourtesyofJuliaBarsi
![Page 12: Landsat 8 OLI and TIRS Calibraon Updates and Trends for](https://reader033.vdocuments.net/reader033/viewer/2022052722/628f0012003bab59b161c717/html5/thumbnails/12.jpg)
Aug242017The26thConferenceonCharacteriza8onandRadiometric
Calibra8onforRemoteSensing(CALCON) 12
TIRSLongTermStability:Deepspace• Instrumentresponsetodeepspaceview
-20
-10
0
10
20
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5
SignalChange[counts]
TimeSinceLaunch[years]
TIRSDeepSpaceascalculatedfromper-orbitcalibrationcollects
Band10bandaverage Band11bandaverage Electronicsswitch
PlotcourtesyofJuliaBarsi
![Page 13: Landsat 8 OLI and TIRS Calibraon Updates and Trends for](https://reader033.vdocuments.net/reader033/viewer/2022052722/628f0012003bab59b161c717/html5/thumbnails/13.jpg)
Aug242017The26thConferenceonCharacteriza8onandRadiometric
Calibra8onforRemoteSensing(CALCON) 13
TIRSVicariousCalibra3ondata
Alldatahasbeenprocessedwiththestraylightcorrec3on.Atthisscale,dataarenicelyscaJeredaboutthe1:1line,thoughitdoesappeartohaveacalibra3ondifferencebetweenSide-AandSide-Bopera3ons
Allmodules,day3medataonly
6
7
8
9
10
11
6 7 8 9 10 11
ImageRadiance
VicariousRadiance
B10CurrentCalibrationResults
JPLcentermodule RIT,allmodules 1:1line
6
7
8
9
10
11
6 7 8 9 10 11
ImageRadiance
VicariousRadiance
B11CurrentCalibrationResults
JPLcentermodule RIT,allmodules 1:1line
PlotcourtesyofJuliaBarsi,NinaRaqueno,SimonHook
![Page 14: Landsat 8 OLI and TIRS Calibraon Updates and Trends for](https://reader033.vdocuments.net/reader033/viewer/2022052722/628f0012003bab59b161c717/html5/thumbnails/14.jpg)
Aug242017The26thConferenceonCharacteriza8onandRadiometric
Calibra8onforRemoteSensing(CALCON) 14
TIRSVicariousCalibra3onResultsSplitCalibra3onResidualerror
• Assumingnodifferencebetweenelectronics
Band Electronics N
Collec8on-1Residualbias
error[W/m2srum]
Collec8on-1Residualbias
error[K]
Collec8on-1RMSE[K]
10primary 145 -0.02+/-0.01 -0.30 0.51redundant 223 -0.06+/-0.01 -0.41 0.48
11 primary 145 0.07+/-0.02 0.55 0.78redundant 223 0.02+/-0.01 0.13 0.85
• Only considering daytime data
TablecourtesyofJuliaBarsi
![Page 15: Landsat 8 OLI and TIRS Calibraon Updates and Trends for](https://reader033.vdocuments.net/reader033/viewer/2022052722/628f0012003bab59b161c717/html5/thumbnails/15.jpg)
Aug242017The26thConferenceonCharacteriza8onandRadiometric
Calibra8onforRemoteSensing(CALCON) 15
Collec3on-1addi3onofOverlapanalysis
• U3lizeGeometricprocessingregistra3onandresamplingtoolstofindpixel-pairsintheproducedimagesfromtwoadjacentmodules.
• ComputetheRa3oandDifferenceovereachsceneforalloverlapzonesinallbandsincludingTIRSinallearthscenes
• Es3matesarestableandclean.Usingover60,000pairssamplesineachzoneperscene.
• Sta3s3cshadbeencollectedfortheen3reLandsat8archive(>1,020,271earthscenesasofJune302017)
- 7 - LDCM-DFCB-002 Version 9.0
Figure 2-5. SCA Detector Overlap
2.1.1.2 Detector to L0Ra Pixel (ground) Overview Refer to Figure 2-6 for an OLI example detector to pixel mapping. The detector readout order for the even-numbered SCAs is reversed in the L0Ra image output to account for their ‘flipped’ orientation on the focal plane, and that the VRP pixels are stripped from the image bands.
OLI SCA Overlap Area (approx. 20 pixels)
SCA13 SCA9 SCA11 SCA7 SCA5 SCA3 SCA1
Along Track Direction
Along Track Direction
TIRS SCA Overlap Area 35 pixels between
adjacent SCAs 70 pixels per line total
SCA C
SCA B SCA A
OLI–FPMLayoutandoverlapdiagram(Source–USGS.”Landsat8Level0ReformaJedDataFormatControlBook”hJp://landsat.usgs.gov/documents/LDCM-DFCB-002.pdf)
![Page 16: Landsat 8 OLI and TIRS Calibraon Updates and Trends for](https://reader033.vdocuments.net/reader033/viewer/2022052722/628f0012003bab59b161c717/html5/thumbnails/16.jpg)
Aug242017The26thConferenceonCharacteriza8onandRadiometric
Calibra8onforRemoteSensing(CALCON) 16
Updatedplotwithnewdataspanning>4years
Meanofnewdataincludessignallevelsthroughoutthefulldynamicrange.
0.994
0.996
0.998
1
1.002
1.004
1.006
1.008
0 1 2 3 4 5 6 7 8 9 10 11
Mod
uleOverla
pRa
8oM
ean
Landsat8BandNumber
BoundaryZone1BoundaryZone2BoundaryZone3BoundaryZone4BoundaryZone5BoundaryZone6BoundaryZone7BoundaryZone8BoundaryZone9BoundaryZone10BoundaryZone11BoundaryZone12BoundaryZone13
Prototyperesultstestson<32scenes
Updatedresults>500,000scenes
PlotusedatathroughApril2017
![Page 17: Landsat 8 OLI and TIRS Calibraon Updates and Trends for](https://reader033.vdocuments.net/reader033/viewer/2022052722/628f0012003bab59b161c717/html5/thumbnails/17.jpg)
Aug242017The26thConferenceonCharacteriza8onandRadiometric
Calibra8onforRemoteSensing(CALCON) 17
CAband-UniformitytrendFilteredtoasetof530147to553566scenesineachoverlapzone
Overla
pRa
3o
filtered-Black4000scenesmovingAvgSmoothed-Green
0.994
0.996
0.998
1
1.002
1.004
1.006
1.008
0.97
Mod
uleOverla
pRa
2oM
ean
BoundaryZone1BoundaryZone2BoundaryZone3BoundaryZone4BoundaryZone5BoundaryZone6BoundaryZone7BoundaryZone8BoundaryZone9BoundaryZone10BoundaryZone11BoundaryZone12BoundaryZone13
![Page 18: Landsat 8 OLI and TIRS Calibraon Updates and Trends for](https://reader033.vdocuments.net/reader033/viewer/2022052722/628f0012003bab59b161c717/html5/thumbnails/18.jpg)
Aug242017The26thConferenceonCharacteriza8onandRadiometric
Calibra8onforRemoteSensing(CALCON) 18
Filteredby:Mean<=signallevelinoverlap<2xmeanandStdevofra3o<(meanstdev)thisresultedinselec3ng287407smoothedbymovingaverageof400scenes.
TIRS-Uniformitytrend
Module-1/Module-2-GreenModule-2/Module-3-Black
Module-1/Module-2-GreenModule-2/Module-3-Black
Overla
pRa
3o
TimeSinceLaunch[Years]
BAND10
BAND11Overla
pRa
3o
TimeSinceLaunch[Years]
![Page 19: Landsat 8 OLI and TIRS Calibraon Updates and Trends for](https://reader033.vdocuments.net/reader033/viewer/2022052722/628f0012003bab59b161c717/html5/thumbnails/19.jpg)
Aug242017The26thConferenceonCharacteriza8onandRadiometric
Calibra8onforRemoteSensing(CALCON) 19
Signallevelfiltering
Sincescenesta3s3csincludesthedifferenceandra3oforeachoverlapzone.Themeansignallevelintheoverlapcanbecomputed.Withcolla3ngoverlapra3oresultsforsubsetsofthesignallevelsnewplotsofthera3oover3mecanbeproduced.Residualsignalleveldependentuniformitycorrec3onscanbefound.
![Page 20: Landsat 8 OLI and TIRS Calibraon Updates and Trends for](https://reader033.vdocuments.net/reader033/viewer/2022052722/628f0012003bab59b161c717/html5/thumbnails/20.jpg)
Aug242017The26thConferenceonCharacteriza8onandRadiometric
Calibra8onforRemoteSensing(CALCON) 20
CAband-Signallevelfiltering0-0.2Reflectance
0-1Reflectance
0.2-0.6Reflectance
Overla
pRa
3o
TimeSinceLaunch[Years]
Overla
pRa
3o
TimeSinceLaunch[Years]
Overla
pRa
3o
Overla
pRa
3o
TimeSinceLaunch[Years]
Module-3/Module-4-BlackMovingAvgSmoothedModule-3/Module-4-Green
0.6-1Reflectance
![Page 21: Landsat 8 OLI and TIRS Calibraon Updates and Trends for](https://reader033.vdocuments.net/reader033/viewer/2022052722/628f0012003bab59b161c717/html5/thumbnails/21.jpg)
Aug242017The26thConferenceonCharacteriza8onandRadiometric
Calibra8onforRemoteSensing(CALCON) 21
Canwesearchforresidualnon-linearity?
• Selectsubsetofsignalsin20stepsperband• ComputetheOverlapra3ofromeachsubset• AverageoverthesubsetandplotforeverySCAoverlapthera3ovs.signallevel.
• Timeperiodcanbepredefined(Ididnotfilterforthatinthisini3allook)
![Page 22: Landsat 8 OLI and TIRS Calibraon Updates and Trends for](https://reader033.vdocuments.net/reader033/viewer/2022052722/628f0012003bab59b161c717/html5/thumbnails/22.jpg)
Aug242017The26thConferenceonCharacteriza8onandRadiometric
Calibra8onforRemoteSensing(CALCON) 22
CABandRa3ocomputedVs.Signallevel
0.994
0.996
0.998
1
1.002
1.004
1.006
1.008
0.97
Mod
uleOverla
pRa
2oM
ean
BoundaryZone1BoundaryZone2BoundaryZone3BoundaryZone4BoundaryZone5BoundaryZone6BoundaryZone7BoundaryZone8BoundaryZone9BoundaryZone10BoundaryZone11BoundaryZone12BoundaryZone13
![Page 23: Landsat 8 OLI and TIRS Calibraon Updates and Trends for](https://reader033.vdocuments.net/reader033/viewer/2022052722/628f0012003bab59b161c717/html5/thumbnails/23.jpg)
Aug242017The26thConferenceonCharacteriza8onandRadiometric
Calibra8onforRemoteSensing(CALCON) 23
Summary• LikeanymissionLandsat8-encountereditson-orbitchallenges– Impactofon-orbiteventsare<0.3%forallbands(band11SideA/Bswitchexcluded)
– Stabilityofrela3vegainsinVNIRbands–improvedfollowing1stsafehold
– StabilityoftheresponseoverallwasminimallyimpactedforOLIandTIRSandiftrendexistsitis<0.3%peryear.
• Trendsofoverlapstatsandinternalcalibratorscandetectslightvaria3onsintheresponsefollowingon-orbitevents,whileotherexternalsourcesEarth/Lunararenotsensi3veenoughtodetectthesmall(<0.5%)varia3ons.
![Page 24: Landsat 8 OLI and TIRS Calibraon Updates and Trends for](https://reader033.vdocuments.net/reader033/viewer/2022052722/628f0012003bab59b161c717/html5/thumbnails/24.jpg)
Aug242017The26thConferenceonCharacteriza8onandRadiometric
Calibra8onforRemoteSensing(CALCON) 24
Summary• OLIdemonstratesuniformitylevelofbeJerthan0.3%overtheen3redynamicrangewithslightseasonalvaria3onsover3me.
• TIRSdemonstratesuniformitylevelofbeJerthan0.3%forband10andbeJerthan0.5%forband11.
• Earthscenebasedmethodofoverlapsta3s3cshasthepoten3alforderivingon-orbitresidualcorrec3onsformodulerela3vegainsincludingupdatesfornon-linearitycorrec3onsacrossthedynamicrange.
![Page 25: Landsat 8 OLI and TIRS Calibraon Updates and Trends for](https://reader033.vdocuments.net/reader033/viewer/2022052722/628f0012003bab59b161c717/html5/thumbnails/25.jpg)
Aug242017The26thConferenceonCharacteriza8onandRadiometric
Calibra8onforRemoteSensing(CALCON) 25
Newcalibra3onac3vi3esweareworkingon
• BuilduptheevidencetoupdateTIRScalibra3onforCollec3on-2.
• Evaluateusingoverlapsta3s3cstoflaJenOLIandTIRSdata.
• Evalua3ngotheron-orbitmethodsforassessmentofTIRSuniformity.
![Page 26: Landsat 8 OLI and TIRS Calibraon Updates and Trends for](https://reader033.vdocuments.net/reader033/viewer/2022052722/628f0012003bab59b161c717/html5/thumbnails/26.jpg)
Aug242017The26thConferenceonCharacteriza8onandRadiometric
Calibra8onforRemoteSensing(CALCON) 26
Ques3ons?