SMOS L1 Processor Prototype Phase 3

Transcription

1 SMOS L1 Processor Prototype Phase 3 6 th SMOS Workshop Antonio Gutiérrez Peña TUD Denmark 15-17th May SMOS L1 Processor Prototype Phase 3

2 L1 & ADF Product Definitions TUD Denmark 15-17th May SMOS L1 Processor Prototype Phase 3

3 L1 Processing Cycle TUD Denmark 15-17th May SMOS L1 Processor Prototype Phase 3

4 L1C Product Contents (I) Level 1c Output Products Brightness Temperatures Swaths in Dual or Full Polarization Magnitudes are expressed at Top of Atmosphere Information is georeferenced using a Discrete Global Grid (ISEA) Two sets of information available: pixel-wise and snapshot-wise Types Science/Browse Land/Sea Dual/Full MIR_SCLD1C, MIR_BWLD1C MIR_SCLF1C, MIR_BWLF1C MIR_SCSD1C, MIR_BWSD1C MIR_SCSF1C, MIR_BWSF1C TUD Denmark 15-17th May SMOS L1 Processor Prototype Phase 3

5 L1C Product Contents (II) Level 1c Output Products Pixel-wise information Discrete Global Grid point identifier Number of measured values in grid point For each value: Brightness Temperature Radiometric accuracy Incidence and Azimuth angles Faraday rotation angle Geometric rotation angle Footprint size (min/max) Snapshot ID Flags Polarisation Corrections performed during reconstruction Pixel position within Field of View TUD Denmark 15-17th May SMOS L1 Processor Prototype Phase 3

6 L1C Product Contents (III) Level 1c Output Products Snapshot-wise information Time of measurement Spacecraft orbit vector and attitude TEC magnitude used to compute Faraday rotation IGRF magnetic vector used to compute Faraday rotation Sun illumination angles (RA/DEC) Sun Brightness Temperature corrected magnitude Boresight Radiometric Accuracy Snapshot Overall Accuracy (BT-Tp) TUD Denmark 15-17th May SMOS L1 Processor Prototype Phase 3

7 L1C Product Contents (IV) BT vs Incidence Angle Brightness Temperature (K ) Incidence Angle (deg) H Polarisation BT vs Incidence Angle Brightness Temperature (K ) Incidence Angle (deg) V Polarisation TUD Denmark 15-17th May SMOS L1 Processor Prototype Phase 3

8 L1C Product Contents (V) BT vs Incidence Angle 120 Brightness Temperature (K ) H Polarisation Incidence Angle (deg) BT vs Incidence Angle Brightness Temperature (K ) Incidence Angle (deg) V Polarisation TUD Denmark 15-17th May SMOS L1 Processor Prototype Phase 3

9 L1C Product Contents (VI) Beginning of L1c Swath contour End of L1c Swath contour TUD Denmark 15-17th May SMOS L1 Processor Prototype Phase 3

10 L1B Product Contents (I) Level 1b Output Products Brightness Temperatures Fourier Components in Dual or Full Polarization (scene-wise) Provides the complete spectrum measured by MIRAS (star domain) Allows synthesizing of the MIRAS beam in any viewing direction Types Science/External Target Dual/Full MIR_SC_D1B MIR_SC_F1B MIR_TARD1B MIR_TARF1B TUD Denmark 15-17th May SMOS L1 Processor Prototype Phase 3

11 L1B Product Contents (II) Level 1b Output Products Brightness Temperatures Fourier components (star domain) Time of Measurement Spacecraft orbit vector and attitude Snapshot Overall Accuracy (BT-Tp) LICEF physical temperatures STD Direct Sun position and magnitude corrected from scene Reflected Sun magnitude corrected from scene In case of full pol, every alternate integration time, BT Fourier information is doubled. TUD Denmark 15-17th May SMOS L1 Processor Prototype Phase 3

12 L1B Product Contents (III) L1B Brightness Temperature Fourier components (absolute (phase) value) TUD Denmark 15-17th May SMOS L1 Processor Prototype Phase 3

13 L1A Product Contents (I) Level 1a Output Products Calibrated visibilities (complex de-normalised correlations corrected for offsets and FWF at the origin) (scene-wise) Values are not yet reconstructed, they reflect the real MIRAS measurements Other L1a products contain the calibration tables measured inorbit Types Science/External Target Dual/Full MIR_SC_D1A, MIR_SC_F1A, MIR_TARD1A, MIR_TARF1A TLM_MIRA1A MIR_CORN1A, MIR_UNCN1A, MIR_FWAS1A, MIR_NIR_1A TUD Denmark 15-17th May SMOS L1 Processor Prototype Phase 3

14 L1A Product Contents (I) Level 1a Output Products Measured Calibrated Visibilities in Dual or Full Polarization Time of measurement Calibrated visibilities (72*71/2 complex values) LICEF Physical Temperatures (72) System Temperatures (72) NIR Brightness Temperatures in H and V pol (3) Polarization mode Correlator Layer (Nominal/Redundant) Types MIR_SC_D1A MIR_SC_F1A MIR_TARD1A MIR_TARF1A TUD Denmark 15-17th May SMOS L1 Processor Prototype Phase 3

15 L1A Product Contents (II) L1A L1A Calibrated Calibrated Visibilities Visibilities (absolute (phase) value) TUD Denmark 15-17th May SMOS L1 Processor Prototype Phase 3

16 L1A Product Contents (III) Level 1a Output Products Instrument and Spacecraft HKTM in Engineering units Time of measurement (OBET, UTC and time synchronisation) Spacecraft orbit state vector and attitude PMS Voltages NIR modes, errors and measured pulse lengths Physical Temperatures and thermistors in-flight characterisation Component status (LICEF, CMN, NIR, NS, CCU, Tsync ) Correlator Layer Correlated Noise Injection mode FWF step X-band Telemetry TUD Denmark 15-17th May SMOS L1 Processor Prototype Phase 3

17 L1A Product Contents (IV) Level 1a Output Products In-Orbit Calibration Data Correlated Noise Injection PMS Calibrated Gain and Offset and associated physical temperature FWF at the origin (amplitude and in-phase correction) and associated physical temperature FWF at three time delays (used to compute FWF shape used in reconstruction) Types MIR_CORN1A MIR_FWAS1A Uncorrelated Noise Injection Visibilities offsets Type MIR_UNCN1A NIR Calibration NIR Calibrated Gain and Offset and associated physical temperature Noise Injection Temperature (used to calibrate data) NIR-LICEF PMS Gain and Offset Type MIR_NIR_1A TUD Denmark 15-17th May SMOS L1 Processor Prototype Phase 3

18 L1A Product Contents (V) TUD Denmark 15-17th May SMOS L1 Processor Prototype Phase 3

19 In-Orbit ADF (I) In-Orbit ADF Products System Response Function G Matrix built using Antenna Patterns, Fringe Wash Function shape and LICEF positions. J+ Matrix is the pseudo-inverse of a Stabilised version of G Types AUX_GMAT AUX_JMAT Flat Target Transformation Visibilities measured while in Deep Sky observation, used to solve the Corbella equation during Image Reconstruction Type AUX_FLATT_ TUD Denmark 15-17th May SMOS L1 Processor Prototype Phase 3

20 ADF Data Summary Available Data: L1PP Orbit Scenario file Failure list of elements Time correlation L1A PMS on-ground characterisation NIR on-ground characterisation LICEF absolute phase and efficiency L1B S-parameters on-ground characterisation Antenna patterns Averaged antenna pattern Default Sun, Moon BT maps Galaxy map Flat Target Transformation data System Response Function (G&J Matrices) L1C Discrete Global Grid (Lat/Lon/Alt) Land-Sea mask RFI mask TEC maps (IGS Combined) Best Fit Plane Apodisation window TUD Denmark 15-17th May SMOS L1 Processor Prototype Phase 3

21 smos.esa.int TUD Denmark 15-17th May SMOS L1 Processor Prototype Phase 3