SMOS L2 Ocean Salinity Level 2 Ocean Salinity L1 -> L2OS tools 12 February 2014 ARGANS & SMOS L2OS...

SMOS L2 Ocean Salinity

www.argans.co.uk

Level 2 Ocean Salinity

L1 -> L2OS tools

12 February 2014

ARGANS & SMOS L2OS ESL


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


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)


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)


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


4.2. Hovmoller plots of snapshot mean deltaTB from AUX_DTBXY_ (ARGANS)


ESAC/SPQC High


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


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


9.2. RFI probability monthly maps (Ifremer/CLS)

L3 CATDS TBs

Not yet available

Ifremer/CLS


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


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


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


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.


www.argans.co.uk

L1 -> L2OS tools: latitude bias/short term drift


South Pacific orbits; Hovmoller plots of (Tx+Ty)/2 L1c TB minus JRECON


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


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


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


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


www.argans.co.uk

L1 -> L2OS tools: RFI


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…


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


Global plots of L3 SSS ascending minus descending


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.


www.argans.co.uk

L1 -> L2OS tools: SSS quality

12.3 Global L3 SSS anomaly maps (BEC)

Global plots of L3 SSS anomaly


SSSSMOS minus SSSISAS (2D smoothed ARGO), shows systematic biases eg land and ice contamination.


Quantitative comparisons of SSS with collocated ARGO => SSS quality (bias, std_difference, r) at global and regional scale


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)


Later

Long term drift/bias 2.3. Snapshot mean deltaTB from AUX_DTBXY_ (ARGANS)


ESAC/SPQC High Summer

Long term drift/bias 2.4. OTT deltaTB statistics from AUX_DTBCUR (ARGANS)



Land/sea contamination

3.1. Global Stokes 1 plots (Ifremer/CLS)



3.2. 18 day sub-cycle full pol monitoring (Ifremer/CLS)


Later


3.3. Ghost detection (ACRI-ST) L1 browse Ready 4 months ACRI-ST Medium



L1c TBs Ready ESAC High Done






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


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



L1c TBs High fast per orbit ESAC Low


9.2. RFI probability monthly maps (Ifremer/CLS)

L3 CATDS TBs Not yet available

Ifremer/CLS Later


9.3 Compare L1 & L2OS RFI flagging (LOCEAN/ARGANS/ACRI-ST)

L1c & L2OS flags

Ready fast per orbit ESAC High


10.1. Hovmoller plots & global maps (Ifremer/CLS)




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)


L2OS SSS Ready fast from monthly maps

LOCEAN High

SSS quality (quantification of performance)


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

SMOS L2 Ocean Salinity Level 2 Ocean Salinity L1 -> L2OS tools 12 February 2014 ARGANS & SMOS L2OS...

Documents

Transcript of SMOS L2 Ocean Salinity Level 2 Ocean Salinity L1 -> L2OS tools 12 February 2014 ARGANS & SMOS L2OS...