ceres instrument status flight models 1 -6 (fm1 –fm6)...ceres instrument operations: fm1 -6...
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CERES Instrument StatusFlight Models 1 -6 (FM1 – FM6)
Susan ThomasCERES Instrument Working Group Team
CERES Fall Science Team MeetingSeptember 15 - 17, 2020
Instrument Working GroupWG Chair/PS: Kory Priestley
DPS: Mohan Shankar
Science-Susan Thomas–
Phillip HessHyung Lee
Nathaniel SmithNitchie Smith
Z. Peter Szewczyk Robert Wilson
Data Management- Denise Cooper -
- Dale Walikainen -A. Thomas Grepiotis
Mark TimcoeDianne Snyder
Instrument Operations- B. Mike Tafazoli -
Cian BrancoChristopher Brown
Janet DanielsWilliam Edmonds
Adam HornCarol Kelly
CERES Instrument Working Group
CERES Instrument Operations: FM1 - 6
• Flight Models (FM) 1 -4 and FM6: Normal Crosstrack operation.
• Flight Model 5 (FM5): Full Biaxial mode (azimuth rotation from 115 - 259 degree) since March 23, 2020.
• Aqua spacecraft anomaly with the Formatter Multiplexer Unit (FMU) of Solid State Recorder: August 16 – Sept 2, 2020.
- CERES instruments (FM3 & FM4) in Crosstrack through August 19.- CERES instruments in SAFE mode: Aug 20 – Sept 2 - Anomaly resolved with a soft reset of the FMU.- CERES commanded to Crosstrack : Sept 2, 19:40z (FM3) & 19:42z (FM4) - Calibration results do not show any issue with instrument performance
CERES Instrument Working Group
CERES Instrument Operations: FM1 - 6
• Intercomparison Operation in overpass region of 70 deg NTerra/FM1 – S-NPP/FM5: May to July 2020Terra/FM1 – N20/FM6 : May to July 2020Terra/FM1 – Aqua/FM3: June 1- 30, 2020
• CERES (Terra/FM2) – GERB Operation: June 1 - 30, 2020
• Terra/FM2 PAP for MOSAIC Campaign: May 1 – Sept 10, 2020.Daily commanding to target the Ship Location in Artic Sea Ice.
Polarstern Location: 5/1 – 9/10/2020 CERES PAP Measurement: 6/27/2020
Ship Loc: 81.95N 9.78EPredict: 81.74N 10.19E
CERES Instrument Working Group
NOAA-20/CERES FM6 INSTRUMENT STATUS
1. Calibration: ICM and Solar2. Validation: Tropical Mean3. Intercomparisons
NOAA-20/CERES FM6 Calibration - ICM
CERES Instrument Working Group
Calibration results using on-board sources (Blackbodies and SW Lamp) show a stable sensor performance within 0.15% , after the initial response increase of 2.0% on Total and 1.5% on Shortwave sensors.
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Jan-
18
Feb-
18
Mar
-18
Apr
-18
May
-18
Jun-
18
Jul-1
8
Aug
-18
Sep-
18
Oct
-18
Nov
-18
Dec
-18
Jan-
19
Feb-
19
Mar
-19
Apr
-19
May
-19
Jun-
19
Jul-1
9
Aug
-19
Sep-
19
Oct
-19
Nov
-19
Dec
-19
Jan-
20
Feb-
20
Mar
-20
Apr
-20
May
-20
Jun-
20
Jul-2
0
Aug
-20
Sens
or R
espo
nse
Cha
nge
(%)
FM6 In-Flight Ed1-CV Internal Calibration Results(Monthly Average)
Total Longwave SW Level 2
Normalized to In-Flight Data
NOAA-20/CERES FM6 Calibration - Solar
CERES Instrument Working Group
Solar calibration results with Mirror Attenuator Mosaic (MAM) show similar response trend as ICM results. After the initial response increase of 2.4% for Total and 1.5% for SW, the sensors are stable within 0.1 percent.
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Jan-
18
Feb-
18
Mar
-18
Apr
-18
May
-18
Jun-
18
Jul-1
8
Aug
-18
Sep
-18
Oct
-18
Nov
-18
Dec
-18
Jan-
19
Feb-
19
Mar
-19
Apr
-19
May
-19
Jun-
19
Jul-1
9
Aug
-19
Sep
-19
Oct
-19
Nov
-19
Dec
-19
Jan-
20
Feb-
20
Mar
-20
Apr
-20
May
-20
Jun-
20
Jul-2
0
Aug
-20
Sep
-20
Sens
or R
espo
nse
Cha
nge
(%)
FM6 Solar Calibration
Total Shortwave
Validation Results – Tropical Mean (TM)
CERES Instrument Working Group
• Nadir LW radiance for All-sky Ocean in ± 20 deg Latitude. • Day and Night TM values from both Total and Longwave channels are
trended.• Changes in SW/TOT channel is monitored through Day-Night (DN) Difference
comparison between LW measurements from Total sensor and LW sensor.
-0.6
-0.3
0.0
0.3
0.6
0.9
1.2
1.5
1.8
Nov-17 Feb-18 May-18 Aug-18 Nov-18 Feb-19 May-19 Aug-19 Nov-19 Feb-20 May-20 Aug-20
( Day
-N
ight
) W
atts
/m2
str
Nadir Tropical Mean FM6
Edition1-CVEdition1TOT-SWLW
86
87
88
89
90
Nov-17 Feb-18 May-18 Aug-18 Nov-18 Feb-19 May-19 Aug-19 Nov-19 Feb-20 May-20 Aug-20
Wat
ts/m
2 st
r
Nadir Tropical Mean FM6 Edition1
Day(TOT-SW) Night(TOT)
Day(LW) Night(LW)
N20/FM6 Validation: Comparison with Aqua/FM3
CERES Instrument Working Group
• SW and LW_Day comparisons with Aqua/FM3 show similar anomaly trends for all scenes.
N20/FM6 Validation: Comparison with Aqua/FM3
CERES Instrument Working Group
• N20/FM6 and Aqua/FM3 flux difference remain consistent over 2-year period.
Ocean Mean STDEV
SW -0.021 0.329LW Day 0.070 0.120
LW Night -0.211 0.052Land Mean STDEV
SW 0.153 0.307LW Day -0.118 0.241
LW Night -0.183 0.074
All Scenes Mean STDEV
SW 0.036 0.292LW Day 0.015 0.128
LW Night -0.203 0.053
Flux Difference (%)
CERES Instrument Working Group
S-NPP/ CERES FM5 INSTRUMENT STATUS
1. Calibration: ICM and Solar2. Validation Results3. Intercomparison Results4. RAP Operation
S-NPP CERES FM5 Instrument Calibration
Sensor gain corrections based on ICM calibrations are applied to Edition2 data products.
CERES Instrument Working Group
ICM calibration: Increase in response of 0.6% for Total and Window sensors. SW sensor shows a drop of 0.2 percent.
Solar calibration: Total and SW sensor responses show increase in trend.
-1.0
-0.8
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
De
c-1
1
De
c-1
2
De
c-1
3
De
c-1
4
De
c-1
5
De
c-1
6
De
c-1
7
De
c-1
8
De
c-1
9
De
c-2
0
De
c-2
1
Se
ns
or
Re
sp
on
se
Ch
an
ge
(%
)
FM5 In-Flight Ed1-CV Internal Calibration Results(Monthly Average)
Total Window SW Level 2
Normalized to In-Flight Data -1.0
-0.8
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
Jan
-12
Ju
l-12
Jan
-13
Ju
l-13
Jan
-14
Ju
l-14
Jan
-15
Ju
l-15
Jan
-16
Ju
l-16
Jan
-17
Ju
l-17
Jan
-18
Ju
l-18
Jan
-19
Ju
l-19
Jan
-20
Ju
l-20
Jan
-21
Se
ns
or
Re
sp
on
se
Ch
an
ge
(%
)
FM5 Solar Calibration
Total Shortwave
FM5 Validation: Tropical Mean
CERES Instrument Working Group
• Nadir LW radiance for All-sky Ocean in ± 20 deg Latitude. • Day-Night (DN) Difference comparison between LW and Simulated LW from
Window measurements highlight the changes in SW/TOT sensor.• DN Difference on Edition2 data show a stable trend. SW/TOT SRF correction
removed the positive trend of < 0.01 W/m2sr /year observed in Edition1 data.
-1
0
1
2
Oct-11 Oct-12 Oct-13 Oct-14 Oct-15 Oct-16 Oct-17 Oct-18 Oct-19
( Day
-N
ight
) W
atts
/m
2 st
r
Nadir Tropical Mean FM5 Edition2
TOT-SW LW_regr Difference Edition1
FM5 Validation: DCC 3-Channel Comparison
CERES Instrument Working Group
• Deep Convective Cloud used as target to conduct consistency check between the 3 sensors.
• The slope in monthly trend of LW and Simulated LW (Window) difference with SW measurement is monitored over time.
• Highlights the variation in the relationship between response functions of SW sensor and SW portion of Total sensor.
-0.02
-0.01
0.00
0.01
0.02
0.03
0.04
Oct-11 Oct-12 Oct-13 Oct-14 Oct-15 Oct-16 Oct-17 Oct-18 Oct-19 Oct-20
slop
e [ Δ
LW v
s. fi
lSW
]
FM5 Nadir Three Channel
Edition2
FM5 Validation - Terra and Aqua Comparison
CERES Instrument Working Group
- FM5 SW and LW-Day Flux Anomalies show consistent trend as Terra/FM1 and Aqua/FM3 data for 2012 - 2020
FM5 Validation: Comparison with Aqua/FM3
CERES Instrument Working Group
S-NPP/FM5 (ED2) – Aqua/FM3 (ED4) Fluxes
FM5 Biaxial Operation
CERES Instrument Working Group
• FM5 instrument is operating in Biaxial mode since October 1, 2019
- Restricted Biaxial mode: Oct 1, 2019 – March 22, 2020- Normal Biaxial mode since March 23, 2020
• SW Flux anomaly comparison for All-Sky and Clear Ocean scenes do not show any drop in the Clear Ocean SW data.
CERES Instrument Working Group
TERRA & AQUA INSTRUMENT STATUS[CERES FM1 – FM4]
1. Calibration: ICM and Solar2. Validation Results3. Edition4 Gain/SRF Strategy
Terra CERES FM1 & FM2 Instrument Calibration
CERES Instrument Working Group
• Increase in response for Total and Window sensors• Drop in response for SW sensors.
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
Ma
r-0
0
Ma
r-0
1
Ma
r-0
2
Ma
r-0
3
Ma
r-0
4
Ma
r-0
5
Ma
r-0
6
Ma
r-0
7
Ma
r-0
8
Ma
r-0
9
Ma
r-1
0
Ma
r-1
1
Ma
r-1
2
Ma
r-1
3
Ma
r-1
4
Ma
r-1
5
Ma
r-1
6
Ma
r-1
7
Ma
r-1
8
Ma
r-1
9
Ma
r-2
0
Ma
r-2
1
Ma
r-2
2
Se
ns
or R
es
po
ns
e C
ha
ng
e (
%)
FM1 In-Flight Ed1-CV Internal Calibration Results(Monthly Average)
Total Window SW Level 2
Normalized to In-Flight Data-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
Ma
r-0
0
Ma
r-0
1
Ma
r-0
2
Ma
r-0
3
Ma
r-0
4
Ma
r-0
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r-0
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Ma
r-0
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Ma
r-0
8
Ma
r-0
9
Ma
r-1
0
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r-1
1
Ma
r-1
2
Ma
r-1
3
Ma
r-1
4
Ma
r-1
5
Ma
r-1
6
Ma
r-1
7
Ma
r-1
8
Ma
r-1
9
Ma
r-2
0
Ma
r-2
1
Ma
r-2
2
Se
ns
or
Re
sp
on
se
Ch
an
ge
(%
)
FM2 In-Flight Ed1-CV Internal Calibration Results(Monthly Average)
Total Window SW Level 2
Normalized to In-Flight Data
Aqua CERES FM3 & FM4 Instrument Calibration
CERES Instrument Working Group
• Increase in response for Total and SW sensors. • Window sensor on FM3 showed a drop where as FM4 response show
slight upward trend.
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
Ju
l-02
Ju
l-03
Ju
n-0
4
Ju
n-0
5
Ju
l-06
Ju
l-07
Ju
n-0
8
Ju
n-0
9
Ju
l-10
Ju
l-11
Ju
n-1
2
Ju
n-1
3
Ju
l-14
Ju
l-15
Ju
n-1
6
Ju
n-1
7
Ju
l-18
Ju
l-19
Ju
n-2
0
Se
nso
r R
esp
on
se C
ha
ng
e (
%)
FM3 In-Flight Ed1-CV Internal Calibration Results(Monthly Average)
Total Window SW Level 2
Normalized to In-Flight Data
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
Ju
l-02
Ju
l-03
Ju
n-0
4
Ju
n-0
5
Ju
l-06
Ju
l-07
Ju
n-0
8
Ju
n-0
9
Ju
l-10
Ju
l-11
Ju
n-1
2
Ju
n-1
3
Ju
l-14
Ju
l-15
Ju
n-1
6
Ju
n-1
7
Ju
l-18
Ju
l-19
Ju
n-2
0
Ju
n-2
1
Se
nso
r R
esp
on
se C
ha
ng
e (
%)
FM4 In-Flight Ed1-CV Internal Calibration Results(Monthly Average)
Total Window SW Level 2
Normalized to In-Flight Data
Terra & Aqua Solar Calibration Results
• After the new solar raster scan calibration sequence starting April 2006, the MAMs showed similar rate of change – 1% for SW sensors and 1.5 to 2.5 % for Total sensors.
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
Feb-
00
Feb-
01
Feb-
02
Feb-
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Feb-
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Feb-
15
Feb-
16
Feb-
17
Feb-
18
Feb-
19
Feb-
20
Feb-
21
Sens
or R
espo
nse
Cha
nge
(%)
FM1 Solar Calibration
Total Shortwave
-4.0
-2.0
0.0
2.0
4.0
6.0
8.0
Feb-
00
Feb-
01
Feb-
02
Feb-
03
Feb-
04
Feb-
05
Feb-
06
Feb-
07
Feb-
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Feb-
09
Feb-
10
Feb-
11
Feb-
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Feb-
13
Feb-
14
Feb-
15
Feb-
16
Feb-
17
Feb-
18
Feb-
19
Feb-
20
Feb-
21
Sens
or R
espo
nse
Cha
nge
(%)
FM2 Solar Calibration
Total Shortwave
-2.0
-1.0
0.0
1.0
2.0
3.0
4.0
Jun-
02
Jun-
03
Jun-
04
Jun-
05
Jun-
06
Jun-
07
Jun-
08
Jun-
09
Jun-
10
Jun-
11
Jun-
12
Jun-
13
Jun-
14
Jun-
15
Jun-
16
Jun-
17
Jun-
18
Jun-
19
Jun-
20
Jun-
21
Sens
or R
espo
nse
Cha
nge
(%)
FM3 Solar Calibration
Total Shortwave
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0Ju
n-02
Jun-
03
Jun-
04
Jun-
05
Jun-
06
Jun-
07
Jun-
08
Jun-
09
Jun-
10
Jun-
11
Jun-
12
Jun-
13
Jun-
14
Jun-
15
Jun-
16
Jun-
17
Jun-
18
Jun-
19
Jun-
20
Jun-
21
Sens
or R
espo
nse
Cha
nge
(%)
FM4 Solar Calibration
Total Shortwave
Validation – Tropical mean Results
CERES Instrument Working Group
-1
0
1
2
Dec-99 Dec-01 Dec-03 Dec-05 Dec-07 Dec-09 Dec-11 Dec-13 Dec-15 Dec-17 Dec-19
( Day
-N
ight
) W
atts
/m2
str
Nadir Tropical Mean FM1 Edition4
TOT-SW LWregr Difference
-1
0
1
2
Dec-99 Dec-01 Dec-03 Dec-05 Dec-07 Dec-09 Dec-11 Dec-13 Dec-15 Dec-17 Dec-19
( Day
-N
ight
) W
atts
/m2
str
Nadir Tropical Mean FM2 Edition4
TOT-SW LWregr Difference
-1
0
1
2
May-02 May-04 May-06 May-08 May-10 May-12 May-14 May-16 May-18 May-20
( Day
-N
ight
) W
atts
/m2
str
Nadir Tropical Mean FM3 Edition4
TOT-SW LWregr Difference
Validation – DCC 3-Channel Intercomparison
CERES Instrument Working Group
-0.05
-0.03
-0.01
0.01
0.03
0.05
Dec-99 Dec-01 Dec-03 Dec-05 Dec-07 Dec-09 Dec-11 Dec-13 Dec-15 Dec-17 Dec-19
slop
e [ DLW
vs.
filS
W ]
Terra and Aqua Three Channel Intercomparison
FM1
FM2
FM3
FM4
Validation: TERRA & AQUA Edition-4 Results
CERES Instrument Working Group
SW and LW-Day Flux Anomalies show similar trends for FM1, FM2 and FM3 instruments
TERRA/AQUA Edition4 GAIN & SRF Strategy
LW Flux Comparison for 5-mon vs 3-mon average Gain value
CERES Instrument Working Group
• Current Gain corrections applied for Total and Window sensors are based on 5-month average of ICM Blackbody calibrations.
• The impact on LW Flux measurement with 3-month average for the gain correction was evaluated.
FM1 FM3Gain Diff % (Ed4 -3mon)
Flux Ed4 Gain
W/m2
Flux 3-mon Gain
W/m2
Flux Diff % (Ed4 –3mon)
Gain Diff % (Ed4 -
3mon)
Flux Ed4 Gain
W/m2
Flux 3-mon Gain
W/m2
Flux Diff % (Ed4 –3mon)
Jan 20 0.008 237.85 237.88 -0.013 0.051 237.92 238.15 -0.097Feb 20 -0.002 239.22 239.22 0.00 0.057 239.42 239.67 -0.104Mar 20 -0.027 239.39 239.22 0.071 0.050 239.27 239.5 -0.096
TERRA/AQUA Edition4 GAIN & SRF Strategy
CERES Instrument Working Group
• The SW/TOT Spectral Response Function (SRF) changes for LW_Day is stable for most scenes in last 18 – 24 months.
• Constant SRF with 3-month average gain showed < 0.07% change [Jan-Mar 2020] in Edition4 LW Flux measurement.
• The new Gain/SRF approach will be used for Edition4 processing starting June 2020.
SW/TOT Throughput Change for Terra and Aqua (SRF applied to SCIAMACHY Scene Spectra)
SUMMARY
CERES Instrument Working Group
• CERES FM6 instrument calibration and validation results show stable performance after the initial sensor response increase in Total and Shortwave sensor.
• Validation studies on CERES FM5 instrument do not show any change in the trends from the biaxial operations.
• A new approach to determine Terra and Aqua Instruments’ Total and Window sensor gains is implemented for Edition4 processing starting June 2020. This will reduce the latency in generating CERES higher level data products.
• Validation results from Terra, Aqua and S-NPP show consistent trends among all CERES instruments.
• Gains and SRFs for Terra/Aqua Edition4 and S-NPP Edition2 were delivered through May 2020. Gains for NOAA20 Edition1 processing was delivered through July 2020.
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