level 2 ocean salinity l1 -> l2os tools
DESCRIPTION
Level 2 Ocean Salinity L1 -> L2OS tools. 12 February 2014. ARGANS & SMOS L2OS ESL. L1 -> L2OS tools. L1 performance characteristic Long term drift/bias Land/sea contamination Latitude bias/short term drift Spatial bias TB absolute accuracy Sun correction Sun tail flagging/correction - PowerPoint PPT PresentationTRANSCRIPT
SMOS L2 Ocean Salinity
www.argans.co.uk
Level 2 Ocean Salinity
L1 -> L2OS tools
12 February 2014
ARGANS & SMOS L2OS ESL
SMOS L2 Ocean Salinity
www.argans.co.uk
L1 -> L2OS tools
L1 performance characteristic•Long term drift/bias•Land/sea contamination•Latitude bias/short term drift•Spatial bias•TB absolute accuracy•Sun correction•Sun tail flagging/correction•RFI detection/mitigation•Ascending/descending delta•Full polarimetry•SSS quality
Parameter – product parameter testedMaturity – is the test tool available?Time – estimated time to runRun by – ESL/ESAC/IDEAS/SPQC – TBDImpact – on L1 quality/metrics
Characteristic Test Parameter Maturity Time Run by Impact
Long term drift/bias 2.1. Stokes 1 bias using forward model 2 (CLS) L1b TBs Ready ESAC High
SMOS L2 Ocean Salinity
www.argans.co.uk
L1 -> L2OS tools: part 1Characteristic Test Parameter Maturity Time Run by Impact
Long term drift/bias 2.1. Stokes 1 bias using forward model 2 (CLS)
L1b TBs Ready ESAC High
Long term drift/bias 2.2. Impact of sun on NIR antenna temperature & flagging (Ifremer/CLS)
TBD Not yet available
Long term drift/bias 2.3. Snapshot mean deltaTB from AUX_DTBXY_ (ARGANS)
L1c TBs High 4 days per year for OTT regions
ESAC/SPQC High
Long term drift/bias 2.4. OTT deltaTB statistics from AUX_DTBCUR (ARGANS)
L1c TBs High 5 days per year for OTT regions
ESAC/SPQC High
Land/sea contamination 3.1. Global Stokes 1 plots (Ifremer/CLS) L1b TBs Ready ESAC High
Land/sea contamination 3.2. 18 day sub-cycle full pol monitoring (Ifremer/CLS)
TBD Not yet available
Land/sea contamination 3.3. Ghost detection (ACRI-ST) L1 browse Ready 4 months ACRI-ST Medium
Latitude bias/short term drift
4.1. Hovmoller plots of Stokes 1 in AFFOV using forward model 2 (Ifremer/CLS)
L1c TBs Ready ESAC High
Latitude bias/short term drift
4.2. Hovmoller plots of snapshot mean deltaTB from AUX_DTBXY_ (ARGANS)
L1c TBs High 4 days per year for OTT regions
ESAC/SPQC High
Latitude bias/short term drift
4.3 Latitudinal plots of delta(SSS – ISAS) (LOCEAN)
L2OS SSS High fast LOCEAN Medium
Spatial bias 5.1. OTT analysis (ARGANS) L1c TBs High fast ESAC High
TB absolute accuracy 6.1. Compare Stokes 1 with forward model TBs (Ifremer/CLS)
L1b TBs High ESAC High
TB absolute accuracy 6.2. Global plots of per snapshot mean deltaTBs from DTBXY (ARGANS)
L1c TBs High 5 days per month
ESAC Medium
SMOS L2 Ocean Salinity
www.argans.co.uk
Characteristic Test Parameter Maturity Time Run by Impact
Sun correction 7.1. OTT anomaly plots (LOCEAN) L1c TBs LOCEAN High
Sun tail flagging/correction
8.1. OTT std(deltaTB)/ra plots (LOCEAN) L1c TBs LOCEAN High
RFI detection/mitigation
9.1. OTT std(deltaTB)/ra plots (LOCEAN/ARGANS)
L1c TBs High fast per orbit ESAC Low
RFI detection/mitigation
9.2. RFI probability monthly maps (Ifremer/CLS)
L3 CATDS TBs
Not yet available
Ifremer/CLS
RFI detection/mitigation
9.3 Compare L1 & L2OS RFI flagging (LOCEAN/ARGANS/ACRI-ST)
L1c & L2OS flags
Ready fast per orbit ESAC High
Ascending/descending delta
10.1. Hovmoller plots & global maps (Ifremer/CLS)
L1b TBs Ready ESAC High
Ascending/descending delta
10.2 Global L3 SSS maps (LOCEAN/CLS/BEC)
LOCEAN, CLS, BEC
Medium
Full polarimetry 11.1. Global average maps of Stokes 3 & 4 (Ifremer/CLS)
L1b TBs Not yet available
Full polarimetry 11.2. Polarisation mixing (ACRI-ST) L1c TBs Ready 4 months ACRI-ST Medium
SSS quality (regional assessment)
12.1 Global monthly SSS anomaly maps (LOCEAN)
L2OS SSS Ready fast from monthly maps
LOCEAN High
SSS quality (quantification of performance)
12.2 Collocations with ARGO (LOCEAN)
L2OS SSS colocated with
ARGO SSS
Ready time consuming
LOCEAN High
SSS quality 12.3 Global L3 SSS anomaly maps (BEC)
L3 BEC SSS BEC High
L1 -> L2OS tools: part 2
SMOS L2 Ocean Salinity
www.argans.co.uk
L1 -> L2OS tools: long term drift/bias
2.1 Stokes 1 bias using forward model 2 (CLS)
92+ Pacific orbit model 2 TBs from CLS compare with L1b TBs
Plot bias in (Tx+Ty)/2 in AF & EAF for ascending & descending orbits
2.3. Snapshot mean deltaTB from AUX_DTBXY (ARGANS)
Extracts mean deltaTB (= L1c – model 1 TBs) per snapshot in 0.3 radius xi/eta circle
Plot deltaTB for any region, per polarisation
2.4. OTT deltaTB statistics from AUX_DTBCUR (ARGANS)
Extracts OTT region deltaTB statistics (median & std) for FOV sub-regions
Plot deltaTB per polarisation, per FOV sub-region
SMOS L2 Ocean Salinity
www.argans.co.uk
L1 -> L2OS tools: land-sea contamination
3.1. Global Stokes 1 plots (Ifremer/CLS – same as 6.1)
Global plots of JRECON minus (Tx+Ty)/2 L1c TB
Global plots of delta between (JRECON – L1b) for different L1 configurations/versions
3.3. Ghost detection (ACRI-ST)
Monthly TB map from 42.5° TB at 3 FOV positions. All polarizations.
SMOS L2 Ocean Salinity
www.argans.co.uk
L1 -> L2OS tools: latitude bias/short term drift
4.1. Hovmoller plots of Stokes 1 in AFFOV using forward model 2 (Ifremer/CLS)
South Pacific orbits; Hovmoller plots of (Tx+Ty)/2 L1c TB minus JRECON
4.2. Hovmoller plots of snapshot mean deltaTB from AUX_DTBXY_ (ARGANS)
Hovmoller plots per polarisation (or Stokes1) for any region of binned mean deltaTB (= L1c – model 1 TBs) per snapshot in 0.3 radius xi/eta circle
4.3. Latitudinal plots of delta(SSS – ISAS) (LOCEAN)
Compare good quality retrieved SSS with ISAS for similar orbits (eastern Pacific or other)
Bias patterns can be due to L1 or L2OS forward model
SMOS L2 Ocean Salinity
www.argans.co.uk
L1 -> L2OS tools: spatial bias
5.1. OTT analysis (ARGANS)
Plots, statistics and histograms of OTT deltaTB for all polarisations in AF/EAF/FOV sub-regions, for single orbits (AUX_DTBXY_, any geographical region) and multiple orbits (AUX_DTBCUR, OTT regions only).
Ascending OTT median & std deltaTB for FOV sub-regions (AUX_DTBCUR, 10 May 2011)
v505 v611_300 v505 v611_300
SMOS L2 Ocean Salinity
www.argans.co.uk
L1 -> L2OS tools: TB absolute accuracy
6.1. Compare Stokes 1 with forward model TBs (Ifremer/CLS – same as 3.1)
Global plots of JRECON minus (Tx+Ty)/2 L1c TB
Global plots of delta between (JRECON – L1b) for different L1 configurations/versions
6.2. Global plots of per snapshot mean deltaTBs from AUX_DTBXY_ (ARGANS)
Global plots of any polarisation or Stokes 1 of binned per snapshot mean deltaTBs in a xi/eta 0.3 circle
SMOS L2 Ocean Salinity
www.argans.co.uk
L1 -> L2OS tools: sun & sun tails
7.1. OTT anomaly plots (LOCEAN)
Plots of anomalies (vertical & diagonal stripes) between reference and extracted OTTs
8.1. OTT std(deltaTB)/ra plots (LOCEAN)
Plots of ratios of std(deltaTB) to radiometric accuracy: high values indicate sun tail flagging/correction problems
SMOS L2 Ocean Salinity
www.argans.co.uk
L1 -> L2OS tools: RFI
9.1. OTT std(deltaTB)/ra plots (LOCEAN/ARGANS)
Plots of std(deltaTB)/ra for one or more orbits
Data extracted using breakpoints/ L2OS debug version
9.3. Compare L1 & L2OS RFI flagging (LOCEAN/ARGANS/ACRI-ST)
Snapshot data extracted using compareTBs, flags/TBs plotted per snapshot -> statistical analysis, animations, visual inspection…
SMOS L2 Ocean Salinity
www.argans.co.uk
L1 -> L2OS tools: ascending/descending delta
10.1. Hovmoller plots (Pacific) & global maps (Ifremer/CLS – same as 3.1/6.1/7.1)
Hovmoller & global plots of Stokes 1 descending minus ascending
10.2 Global L3 SSS maps (LOCEAN/CLS/BEC)
Global plots of L3 SSS ascending minus descending
SMOS L2 Ocean Salinity
www.argans.co.uk
L1 -> L2OS tools: Full polarimetry
11.1. Globally averaged maps of T3 and T4 (Ifremer/CLS) – not yet available
-Monitoring of Sea ice/ocean and land/ocean edges-Monitoring of high TEC regions-Monitoring of storms signatures
11.2. Polarisation mixing (ACRI-ST).
Monthly maps of T3/(TX-TY) and T4/T3 at 42.5° and 3 FOV positions.
SMOS L2 Ocean Salinity
www.argans.co.uk
L1 -> L2OS tools: SSS quality
12.3 Global L3 SSS anomaly maps (BEC)
Global plots of L3 SSS anomaly
12.1 Global monthly SSS anomaly maps (LOCEAN)
SSSSMOS minus SSSISAS (2D smoothed ARGO), shows systematic biases eg land and ice contamination.
12.2 Collocations with ARGO (LOCEAN)
Quantitative comparisons of SSS with collocated ARGO => SSS quality (bias, std_difference, r) at global and regional scale
SMOS L2 Ocean Salinity
www.argans.co.uk
Characteristic Test Parameter Maturity Time Run by Impact Deliver?
Long term drift/bias 2.1. Stokes 1 bias using forward model 2 (CLS)
L1b TBs Ready ESAC High Done
Long term drift/bias 2.2. Impact of sun on NIR antenna temperature & flagging (Ifremer/CLS)
TBD Not yet available
Later
Long term drift/bias 2.3. Snapshot mean deltaTB from AUX_DTBXY_ (ARGANS)
L1c TBs High 4 days per year for OTT regions
ESAC/SPQC High Summer
Long term drift/bias 2.4. OTT deltaTB statistics from AUX_DTBCUR (ARGANS)
L1c TBs High 5 days per year for OTT regions
ESAC/SPQC High Summer
Land/sea contamination
3.1. Global Stokes 1 plots (Ifremer/CLS)
L1b TBs Ready ESAC High Done
Land/sea contamination
3.2. 18 day sub-cycle full pol monitoring (Ifremer/CLS)
TBD Not yet available
Later
Land/sea contamination
3.3. Ghost detection (ACRI-ST) L1 browse Ready 4 months ACRI-ST Medium
Latitude bias/short term drift
4.1. Hovmoller plots of Stokes 1 in AFFOV using forward model 2 (Ifremer/CLS)
L1c TBs Ready ESAC High Done
Latitude bias/short term drift
4.2. Hovmoller plots of snapshot mean deltaTB from AUX_DTBXY_ (ARGANS)
L1c TBs High 4 days per year for OTT regions
ESAC/SPQC High Summer
Latitude bias/short term drift
4.3 Latitudinal plots of delta(SSS – ISAS) (LOCEAN)
L2OS SSS High fast LOCEAN Medium
Spatial bias 5.1. OTT analysis (ARGANS) L1c TBs High fast ESAC High Summer
TB absolute accuracy 6.1. Compare Stokes 1 with forward model TBs (Ifremer/CLS)
L1b TBs High ESAC High Done
TB absolute accuracy 6.2. Global plots of per snapshot mean deltaTBs from DTBXY (ARGANS)
L1c TBs High 5 days per month
ESAC Medium Summer
SMOS L2 Ocean Salinity
www.argans.co.uk
Characteristic Test Parameter Maturity Time Run by Impact Deliver?
Sun correction 7.1. OTT anomaly plots (LOCEAN) L1c TBs LOCEAN High
Sun tail flagging/correction
8.1. OTT std(deltaTB)/ra plots (LOCEAN)
L1c TBs LOCEAN High
RFI detection/mitigation
9.1. OTT std(deltaTB)/ra plots (LOCEAN/ARGANS)
L1c TBs High fast per orbit ESAC Low
RFI detection/mitigation
9.2. RFI probability monthly maps (Ifremer/CLS)
L3 CATDS TBs Not yet available
Ifremer/CLS Later
RFI detection/mitigation
9.3 Compare L1 & L2OS RFI flagging (LOCEAN/ARGANS/ACRI-ST)
L1c & L2OS flags
Ready fast per orbit ESAC High
Ascending/descending delta
10.1. Hovmoller plots & global maps (Ifremer/CLS)
L1b TBs Ready ESAC High Done
Ascending/descending delta
10.2 Global L3 SSS maps (LOCEAN/CLS/BEC)
LOCEAN, CLS, BEC
Medium
Full polarimetry 11.1. Global average maps of Stokes 3 & 4 (Ifremer/CLS)
L1b TBs Not yet available
Later
Full polarimetry 11.2. Polarisation mixing (ACRI-ST) L1c TBs Ready 4 months ACRI-ST Medium
SSS quality (regional assessment)
12.1 Global monthly SSS anomaly maps (LOCEAN)
L2OS SSS Ready fast from monthly maps
LOCEAN High
SSS quality (quantification of performance)
12.2 Collocations with ARGO (LOCEAN)
L2OS SSS colocated with
ARGO SSS
Ready time consuming
LOCEAN High
SSS quality 12.3 Global L3 SSS anomaly maps (BEC)
L3 BEC SSS BEC High