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ROSA – ROSSA Validation resultsROSA – ROSSA Validation results
R. Notarpietro, G. Perona, M. CuccaR. Notarpietro, G. Perona, M. Cucca
[email protected]@polito.it
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COSMIC Data
- COSMIC 1: 75 events (10 rising) well distributed in time (2 days for each 06-07 season) and space
- COSMIC 2: data related 31/12/2007 (1120 events)
CHAMP Data
- 120 setting events related to 22/01/2004 observations:
INPUT DATAINPUT DATA
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INPUT DATAINPUT DATA
- COSMIC 2: data related 31/12/2007 (> 1200 events)
90° 65° North Polar regions65° 35° North Temperate regions
35° 35° Tropics
35° 65° South Temp. regions
65° 90° South Polar regions
24 56 8056 188 244
68 336 404
59 149 20817 47 64
R S TOT*
* These figures are related to data couples compared at different levels after outliers removal
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CHAMP DataCHAMP Data
RO
SA
-RO
SS
A
CD
AA
C (
CO
SM
IC)
ISD
C (
CH
AM
P)
COSMIC DataCOSMIC Data
We can quantify differences due to different algorithm implementations (CHAMP Data, COSMIC Data or future ROSA-ROSSA products ARE NOT First Level Benchmark)
This analysis has been carried out even if it is not an absolute validation of ROSA-ROSSA software
1
Validation considering Third Level Benchmarks (output of other RO SWs)
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COSMIC 1/2 Data COSMIC 1/2 Data 2006/20072006/2007
NNee(h)(h)
COSMIC 2 Data COSMIC 2 Data 31/12/2007 31/12/2007
T(h)T(h)Specific humidity (h)Specific humidity (h)ppwetwet(h) (h)
stratosph. optimized (a)(a) iono-free
COSMIC 2 Data COSMIC 2 Data 31/12/200731/12/2007
n(h)n(h)
CHAMP Data CHAMP Data 22/01/0422/01/04
OrbitsOrbits
Excess Excess phasesphases
1
Validation considering Third Level Benchmarks (output of other RO SWs)
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2
Validation considering Second Level Benchmarks (ECMWF Re-analysis)
RO
SA
-RO
SS
A
CD
AA
C (
CO
SM
IC)
ISD
C (
CH
AM
P)
NNRSARSA(h)(h) NNCOSCOS(h)(h)
TTRSARSA(h)(h) TTCOSCOS(h)(h)
WVWVRSARSA(h)(h) WVWVCOSCOS(h)(h)
Dati COSMIC 2 Dati COSMIC 2 31/12/200731/12/2007
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2
Validation considering Second Level Benchmarks (ECMWF Re-analysis)
RO
SA
-RO
SS
A
CD
AA
C (
CO
SM
IC)
ISD
C (
CH
AM
P)
NNRSARSA(h)(h) NNCOSCOS(h)(h)
ECMWF Re-analysis spatially
and temporally
co-located
NNECMECM(h)(h)
TTRSARSA(h)(h) TTCOSCOS(h)(h)TTECMECM(h)(h)
WVWVRSARSA(h)(h) WVWVCOSCOS(h)(h)WVWVECMECM(h)(h)
following Tangent Points
Dati COSMIC 2 Dati COSMIC 2 31/12/200731/12/2007
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2
Validation considering Second Level Benchmarks (ECMWF Re-analysis)
RO
SA
-RO
SS
A
CD
AA
C (
CO
SM
IC)
ISD
C (
CH
AM
P)
NNRSARSA(h)(h) NNCOSCOS(h)(h)
ECMWF Re-analysis spatially
and temporally
co-located
NNECMECM(h)(h)
TTRSARSA(h)(h) TTCOSCOS(h)(h)TTECMECM(h)(h)
WVWVRSARSA(h)(h) WVWVCOSCOS(h)(h)WVWVECMECM(h)(h)
following Tangent Points
Dati COSMIC 2 Dati COSMIC 2 31/12/200731/12/2007
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2
Validation considering Second Level Benchmarks (ECMWF Re-analysis)
RO
SA
-RO
SS
A
CD
AA
C (
CO
SM
IC)
ISD
C (
CH
AM
P)
NNRSARSA(h)(h) NNCOSCOS(h)(h)
ECMWF Re-analysis spatially
and temporally
co-located
NNECMECM(h)(h)
TTRSARSA(h)(h) TTCOSCOS(h)(h)TTECMECM(h)(h)
WVWVRSARSA(h)(h) WVWVCOSCOS(h)(h)WVWVECMECM(h)(h)
following Tangent Points
Outliers identification and removal and Mean Fractional Error evaluation
Dati COSMIC 2 Dati COSMIC 2 31/12/200731/12/2007
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Statistic definition
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100hN
hNhNh
COS
COSRSAN%,
Statistic definition
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100hN
hNhNh
COS
COSRSAN%,
Statistic definition
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Outlier Identification through T-Student test ( 3 threshold) and rejection
Mea
n +
Std
Mea
n -
Std
mea
n
Statistic definition
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OPEN PROBLEMS WITH THE FIRST ROSA-ROSSA RELEASE
Cosmic Raw Excess-phase profiles filtering
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OPEN PROBLEMS WITH THE FIRST ROSA-ROSSA RELEASE
Cosmic Raw Excess-phase profiles filtering
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OPEN PROBLEMS WITH THE FIRST ROSA-ROSSA RELEASE
Cosmic Raw Excess-phases filtering
Statospheric Bending optimization (we are actually using CIRA-Q climatology; ROSA-ROSSA VE will adopt data coming from Numerical Weather Prediction Models)
Wave Optics techniques for Bending angle extraction in low troposphere (foreseen for ROSA-ROSSA VE). Actually DG_ATMO is validated giving COSMIC data in input.
Electron Density profile extraction through ROSA observations is critical given ROSA configuration and observation scheduling
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RSARSA(a)(a)
CD
AA
C
(CO
SM
IC)
COSCOS(a)(a)
1
Validation considering Third Level Benchmarks (output of other RO SWs)
BENDING LEVEL
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SW ROSA-ROSSA 3.0
VALIDATION VS COSMIC DATAVALIDATION VS COSMIC DATA
Rising Setting North Pole
North Temperate
Tropics
South Temperate
South Pole
Number of events
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(a)(a)
a%, hmean
North Pole
North Temperate
Tropics
South Temperate
South Pole
SW ROSA-ROSSA 3.0
VALIDATION VS COSMIC DATAVALIDATION VS COSMIC DATA
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(a)(a)
a%, hmean
North Pole
North Temperate
Tropics
South Temperate
South Pole
SW ROSA-ROSSA 3.0
VALIDATION VS COSMIC DATAVALIDATION VS COSMIC DATA
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(a)(a)
a%, hmean
North Pole
North Temperate
Tropics
South Temperate
South Pole
SW ROSA-ROSSA 3.0
VALIDATION VS COSMIC DATAVALIDATION VS COSMIC DATA
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(a)(a) North Pole
North Temperate
Tropics
South Temperate
South Pole
stdmeana%, h
SW ROSA-ROSSA 3.0
VALIDATION VS COSMIC DATAVALIDATION VS COSMIC DATA
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NNRSARSA(h)(h)
CD
AA
C
(CO
SM
IC)
NNCOSCOS(h)(h)
1REFRACTIVITY LEVEL
Validation considering Third Level Benchmarks (output of other RO SWs)
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NN (h)(h)
hmean N%,
North Pole
North Temperate
Tropics
South Temperate
South Pole
SW ROSA-ROSSA 3.0
VALIDATION VS COSMIC DATAVALIDATION VS COSMIC DATA
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NN (h)(h) North Pole
North Temperate
Tropics
South Temperate
South Pole
stdmeanN%, h
SW ROSA-ROSSA 3.0
VALIDATION VS COSMIC DATAVALIDATION VS COSMIC DATA
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Validation considering Third Level Benchmarks (output of other RO SWs)
TTRSARSA(h)(h)
CD
AA
C
(CO
SM
IC)
TTCOSCOS(h)(h)
1TEMPERATURE and humidity LEVEL
DG_ATMO
qqRSARSA(h)(h) qqCOSCOS(h)(h)
eeRSARSA(h)(h) eeCOSCOS(h)(h)
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• DG_ATMO is a 1-D VAR scheme developed for retrieving temperature, humidity and pressure (only as dependent variable) for the ROSA observations.
• The Background profile is extracted by NCEP long-term mean (365 days) reanalysis.
• Simplified version of error covariance matrices
DG_ATMO
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SW ROSA-ROSSA 3.0
VALIDATION VS COSMIC DATAVALIDATION VS COSMIC DATA
T(h)T(h)
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SW ROSA-ROSSA 3.0
VALIDATION VS COSMIC DATAVALIDATION VS COSMIC DATA
e(h)e(h)
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SW ROSA-ROSSA 3.0
VALIDATION VS COSMIC DATAVALIDATION VS COSMIC DATA
q(h)q(h)
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• Our scheme differs from the COSMIC one.– Formulation of hypotheses to develop the
1D-VAR scheme– Formulation of error covariance matrices– Background fields
• Results are not any different!
DG_ATMO
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Validation considering Third Level Benchmarks (output of other RO SWs)
NeNeRSARSA(h)(h)
CD
AA
C
(CO
SM
IC)
NeNeCOSCOS(h)(h)
1ELECTRON DENSITY LEVEL
DG_DELN
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• The DG_DELN Data Generator evaluates the electron density profile in the ionosphere, using the Onion Peeling algorithm.
• Since the ray bending in the ionosphere is small enough, the straight-line propagation from GPS to LEO satellites has been assumed for the GPS signals.
• As required by the inversion technique adopted, the spherical symmetry for the electron density of the ionosphere has been assumed.
• Excess phase measurements at L1 and L2 GPS frequencies during one occultation event are used to compute the TEC in the shell determined by the LEO orbit (calibrated TEC).
DG_DELN
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DG_DELNCOSMIC
SW ROSA-ROSSA 3.0
VALIDATION VS COSMIC DATAVALIDATION VS COSMIC DATA
Ne(h)Ne(h)
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DG_DELNCOSMIC
SW ROSA-ROSSA 3.0
VALIDATION VS COSMIC DATAVALIDATION VS COSMIC DATA
Ne(h)Ne(h)
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DG_DELNCOSMIC
SW ROSA-ROSSA 3.0
VALIDATION VS COSMIC DATAVALIDATION VS COSMIC DATA
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DG_DELNCOSMIC
SW ROSA-ROSSA 3.0
VALIDATION VS COSMIC DATAVALIDATION VS COSMIC DATA
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DG_DELNCOSMIC
SW ROSA-ROSSA 3.0
VALIDATION VS COSMIC DATAVALIDATION VS COSMIC DATA
Ne(h)Ne(h)
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DG_DELNCOSMIC
SW ROSA-ROSSA 3.0
VALIDATION VS COSMIC DATAVALIDATION VS COSMIC DATA
Ne(h)Ne(h)
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DG_DELNCOSMIC
SW ROSA-ROSSA 3.0
VALIDATION VS COSMIC DATAVALIDATION VS COSMIC DATA
Ne(h)Ne(h)
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DG_DELNCOSMIC
SW ROSA-ROSSA 3.0
VALIDATION VS COSMIC DATAVALIDATION VS COSMIC DATA
Ne(h)Ne(h)
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DG_DELNCOSMIC
SW ROSA-ROSSA 3.0
VALIDATION VS COSMIC DATAVALIDATION VS COSMIC DATA
Ne(h)Ne(h)
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DG_DELNCOSMIC
SW ROSA-ROSSA 3.0
VALIDATION VS COSMIC DATAVALIDATION VS COSMIC DATA
Ne(h)Ne(h)
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average +/- st.dev.average
SW ROSA-ROSSA 3.0
VALIDATION VS COSMIC DATAVALIDATION VS COSMIC DATA
Ne(h)Ne(h)
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RO
SA
-RO
SS
A
CD
AA
C (
CO
SM
IC)
NNRSARSA(h)(h) NNCOSCOS(h)(h)
ECMWF Re-analysis
spatially and
temporally co-located
NNECMECM(h)(h)
2
Validation considering Second Level Benchmarks (ECMWF Re-analysis)
REFRACTIVITY LEVEL
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North Pole
North Temperate
Tropics
South Temperate
South Pole
RISING
Number of events
SW ROSA-ROSSA 3.0
VALIDATION VS ECMWFVALIDATION VS ECMWF
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NN (h)(h)North Pole
North Temperate
Tropics
South Temperate
South Pole
RISING50
03
71012
16
40
30
He
igh
t [k
m]
25
SW ROSA-ROSSA 3.0
VALIDATION VS ECMWFVALIDATION VS ECMWF
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NN (h)(h)North Pole
North Temperate
Tropics
South Temperate
South Pole
RISING50
03
71012
16
40
30
He
igh
t [k
m]
25
SW ROSA-ROSSA 3.0
VALIDATION VS ECMWFVALIDATION VS ECMWF
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North Pole
North Temperate
Tropics
South Temperate
South Pole
SETTING
Number of events
SW ROSA-ROSSA 3.0
VALIDATION VS ECMWFVALIDATION VS ECMWF
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NN (h)(h)North Pole
North Temperate
Tropics
South Temperate
South Pole
50
03
71012
16
40
30
He
igh
t [k
m]
25
SETTING
SW ROSA-ROSSA 3.0
VALIDATION VS ECMWFVALIDATION VS ECMWF
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NN (h)(h)North Pole
North Temperate
Tropics
South Temperate
South Pole
50
03
71012
16
40
30
He
igh
t [k
m]
25
SETTING
SW ROSA-ROSSA 3.0
VALIDATION VS ECMWFVALIDATION VS ECMWF
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2TEMPERATURE and Spec. Humidity LEVEL
RO
SA
-RO
SS
A
TTRSARSA(h)(h)
ECMWF Re-analysis
spatially and
temporally co-located
TTECMECM(h)(h)DG_ATMO
qqRSARSA(h)(h) qqECMECM(h)(h)
Validation considering Second Level Benchmarks (ECMWF Re-analysis)
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• Use the closest horizontal grid point (in the space-time) domain per each vertical level, this means reconstructing an ECMWF “slanted” vertical profile
• Interpolation of ECMWF and ROSA on a common vertical grid (100 m vertical resolution like the COSMIC one).
• 25 Pressure levels ECMWF data, 0.25 degree horizontal resolution
DG_ATMO
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SW ROSA-ROSSA 3.0
VALIDATION VS ECMWFVALIDATION VS ECMWF
T(h)T(h)
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SW ROSA-ROSSA 3.0
VALIDATION VS ECMWFVALIDATION VS ECMWF
q(h)q(h)
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2ELECTRON DENSITY LEVEL
RO
SA
-RO
SS
A
NeNeRSARSA(h)(h)
IONOGRAMS
NeNetruetrue(h)(h)DG_DELN
Validation considering Second Level Benchmarks (ECMWF Re-analysis)
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• DG_DELN derived profiles are compared with ionosonde derived (bottomside) profiles.
• The distance between the Ionosonde location and the DG_DELN derived peak location has been chosen to be less than [2.5° x 2.5°] in [lat. x lon.] and 15 min in time.
• The ionograms have been selected and scaled by K. Alazo of the Instituto Geofisica y Astronomia, La Habana, Cuba in the framework of the STEP program of ICTP.
DG_DELN
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DG_DELNIONOSONDE
SW ROSA-ROSSA 3.0
VALIDATION VS ECMWFVALIDATION VS ECMWF
Ne(h)Ne(h)
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DG_DELNIONOSONDE
SW ROSA-ROSSA 3.0
VALIDATION VS ECMWFVALIDATION VS ECMWF
Ne(h)Ne(h)
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DG_DELNIONOSONDE
SW ROSA-ROSSA 3.0
VALIDATION VS ECMWFVALIDATION VS ECMWF
Ne(h)Ne(h)
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DG_DELNIONOSONDE
SW ROSA-ROSSA 3.0
VALIDATION VS ECMWFVALIDATION VS ECMWF
Ne(h)Ne(h)
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DG_DELNIONOSONDE
SW ROSA-ROSSA 3.0
VALIDATION VS ECMWFVALIDATION VS ECMWF
Ne(h)Ne(h)
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DG_DELNIONOSONDE
SW ROSA-ROSSA 3.0
VALIDATION VS ECMWFVALIDATION VS ECMWF
Ne(h)Ne(h)
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DG_DELNIONOSONDE
SW ROSA-ROSSA 3.0
VALIDATION VS ECMWFVALIDATION VS ECMWF
Ne(h)Ne(h)
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DG_DELNIONOSONDE
SW ROSA-ROSSA 3.0
VALIDATION VS ECMWFVALIDATION VS ECMWF
Ne(h)Ne(h)
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DG_DELNIONOSONDE
SW ROSA-ROSSA 3.0
VALIDATION VS ECMWFVALIDATION VS ECMWF
Ne(h)Ne(h)
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DG_DELNIONOSONDE
SW ROSA-ROSSA 3.0
VALIDATION VS ECMWFVALIDATION VS ECMWF
Ne(h)Ne(h)
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DG_DELNIONOSONDE
SW ROSA-ROSSA 3.0
VALIDATION VS ECMWFVALIDATION VS ECMWF
Ne(h)Ne(h)
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DG_DELNIONOSONDE
SW ROSA-ROSSA 3.0
VALIDATION VS ECMWFVALIDATION VS ECMWF
Ne(h)Ne(h)
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DG_DELNIONOSONDE
SW ROSA-ROSSA 3.0
VALIDATION VS ECMWFVALIDATION VS ECMWF
Ne(h)Ne(h)
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DG_DELNIONOSONDE
SW ROSA-ROSSA 3.0
VALIDATION VS ECMWFVALIDATION VS ECMWF
Ne(h)Ne(h)
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DG_DELNIONOSONDE
SW ROSA-ROSSA 3.0
VALIDATION VS ECMWFVALIDATION VS ECMWF
Ne(h)Ne(h)
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DG_DELNIONOSONDE
SW ROSA-ROSSA 3.0
VALIDATION VS ECMWFVALIDATION VS ECMWF
Ne(h)Ne(h)
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Statistic definition
from Kursinsky et al., JGR1997
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Mea
n +
Std
Mea
n -
Std
mea
n
Statistic definition
Outlier Identification through T-Student test ( 3 threshold) and rejection
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NN (h)(h)
hmean N%,
North Pole
North Temperate
Tropics
South Temperate
South Pole
SW ROSA-ROSSA 3.0
VALIDATION VS COSMIC DATAVALIDATION VS COSMIC DATA
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NN (h)(h)North Pole
North Temperate
Tropics
South Temperate
South Pole
RISING50
03
71012
16
40
30
He
igh
t [k
m]
25
SW ROSA-ROSSA 3.0
VALIDATION VS ECMWFVALIDATION VS ECMWF
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NN (h)(h)North Pole
North Temperate
Tropics
South Temperate
South Pole
50
03
71012
16
40
30
He
igh
t [k
m]
25
SETTING
SW ROSA-ROSSA 3.0
VALIDATION VS ECMWFVALIDATION VS ECMWF