1 / 24

Level 2 Ocean Salinity PM #20

Level 2 Ocean Salinity PM #20. @ BEC. 21-22 February 2011. ARGANS & L2OS ESL. L2OS status. 317 go-ahead to be installed in DPGS end February/early March also ECMWF pre-processor update (& L2SM) L1OP 350 delivery scheduled for 01/04/2011 Post-317 delivery/acceptance

bruno
Download Presentation

Level 2 Ocean Salinity PM #20

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Level 2 Ocean Salinity PM #20 @ BEC 21-22 February 2011 ARGANS & L2OS ESL

  2. L2OS status • 317 go-ahead to be installed in DPGS end February/early March • also ECMWF pre-processor update (& L2SM) • L1OP 350 delivery scheduled for 01/04/2011 • Post-317 delivery/acceptance • New roughness model 3 LUT • PRs: • outlier detection – detected by ARGANS 1 February • use of L1 RFI flags – detected by ARGANS 27 January • ECMWF rain rate units & Tg_max_rainfall/Fg_sc_rain – detected by ARGANS 4 February • BULL_B validity – detected by IDEAS 18 February, blocking

  3. Roughness 3 LUT SM_TEST_AUX_RGHNS3_20050101T000000_20500101T000000_001_012_8 (19/11/2010)

  4. Roughness 3 LUT SM_TEST_AUX_RGHNS3_20050101T000000_20500101T000000_001_013_8 (21/01/2011)

  5. Outlier detection • Outlier test: • abs((Tbmeas - Tbmodel) - correction) > nsig . sigmaTb • ATBD: • correction = median (Tbmeas - Tbmodel) • DPM & 0317: • correction = median (Tbmeas) – median(Tbmodel)

  6. Outlier detection • Number of outliers plotted against longitude (0317), latitude +- 1 degree • total outliers 8477, 1570 grid points

  7. Outlier detection • Number of outliers plotted against longitude (0318), latitude +- 1 degree • total outliers 7802, 1570 grid points

  8. Outlier detection • Number of outliers plotted against longitude (0317), latitude 49-51 • total outliers 33243, 1674 grid points

  9. Outlier detection • Number of outliers plotted against longitude (0318), latitude 49-51 • total outliers 31676, 1674 grid points

  10. Outlier detection: SSS1 0317 0318 delta (317-318) SM_OPER_MIR_SCSF1C_20100802T153816_20100802T163215_344_001_1

  11. Outlier detection: Dg_num_outliers 0317 0318 delta (317-318) SM_OPER_MIR_SCSF1C_20100802T153816_20100802T163215_344_001_1

  12. L1 & L2 RFI flags • L2 fm_l1c_rfi set if any of L1c flags set: • fml1c_rfi_mitigation • fml1c_rfi_strong • fml1c_rfi_point • L2OS 0317 sets fm_valid = false if fm_l1c_rfi set • Some orbits may have L1 RFI flags set over a wide area, eg SM_TEST_MIR_SCSF1C_20100315T080748_20100315T090119_350_001_0 • So L2OS 0317 will find too few measurements for many grid points

  13. L1 & L2 RFI flags 0317 0318 few outliers? SM_TEST_MIR_SCSF1C_20100315T080748_20100315T090119_350_001_0

  14. Outliers & RFI Outlier threshold (nsig) = 5 sigma

  15. Outliers & RFI Outlier threshold (nsig) = 4 sigma

  16. Outliers & RFI Outlier threshold (nsig) = 3 sigma

  17. Outliers & RFI Outlier threshold (nsig) = 2 sigma

  18. Outliers & RFI Outlier threshold (nsig) = 1 sigma

  19. Outliers & RFI SM_TEST_MIR_OSDAP2_20110209T064251_20110209T073653_317_001_8 Transect at 45N +-1 Dg_num_outliers

  20. Outliers & RFI HH: 13/71 outliers

  21. Outliers & RFI VV: 54/72 outliers

  22. Outliers & RFI But: high WS, sun tails...?

  23. Rain Rate ECMWF rain rate is metres/hour (103 litres per m2 per hour), not mm/hr Max values are typically 0.02-0.03 in storms. AUX_CNFOSD/F sets Tg_max_rainfall = 2, so Fg_sc_rain is never set ECMWF Rain_Rate Fg_sc_rain (Tg_max_rainfall = 0.002)

  24. L2OS delivery decisions • 318 • correct outlier detection • flag & process measurements with L1 RFI flags • correct Tg_max_rainfall in AUX_CNFOSD/F • fix BULL_B validity PR • specify xi/eta box, need defaults (JB/XY?) • Open questions for May delivery: • More tuning of roughness models? • ICM empirical model without flat sea - analysis and algorithm design: assess CRR impact for QWG #4 • RFI detection/mitigation • Sun/galactic glint • ignore belt/suspenders using new L1c flag, if available? • ...

More Related