GRUAN Data Flow and RS92 Data Product v2
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1 GRUAN Data Flow and RS92 Data Product v2 Michael Sommer GRUAN, DWD 5 th GRUAN Implementation and Coordination Meeting (ICM-5) De Bilt, Netherlands 25 February 2013
2 Outline Overview of GRUAN data flow RS92 GRUAN data product Quantity and quality statistics Examples of quality issues Conclusion M. Sommer De Bilt, NL p 2
3 GRUAN data flow Collecting raw data and meta-data Using RsLaunchClient or automatic batch-routines Pre-processing Archive File archive and GRUAN Meta Data Base (GMDB) Processing RS92-GDP v2 (+ some additional beta versions) Dissemination at NCDC Monitoring Running at 13 sites Running for all radiosonde launches File Archive ~ 160 GiB GMDB ~ 2,5 GiB Operational running only for RS92 launches Only for all approved data Running LC intern Creation of reports for sites M. Sommer De Bilt, NL p 3
4 Collected data of sonde types Code Count Instrument Name Manufacturer RS92-FN 162 Vaisala RS92-FN Vaisala RS92-K 49 Vaisala RS92-K Vaisala RS92-KL 3,060 Vaisala RS92-KL Vaisala RS92-SGP 15,308 Vaisala RS92-SGP Vaisala RS92-SGPA 1,152 Vaisala RS92-SGPA Vaisala RS92 Vaisala RS92-SGPD 1,813 Vaisala RS92-SGPD Vaisala RS92-SGPL 1,521 Vaisala RS92-SGPL Vaisala RS92-SGPW 603 Vaisala RS92-SGPW Vaisala DFM Graw DFM-06 GRAW Radiosondes GmbH & Co. KG DFM Graw DFM-09 GRAW Radiosondes GmbH & Co. KG DFM-97 1 Graw DFM-97 GRAW Radiosondes GmbH & Co. KG IMET-1 94 imet-1 InterMet Systems (US) IMET-1-EE 3 imet-1 (E+E) InterMet Systems (US) IMET-1-H 17 imet-1 (Humirel) Various routine InterMet Systems (US) LMS6 11 Sippican LMS6 Lockheed Martin Sippican, Inc. RS-06G 20 Meisei RS-06G GPS Radiosonde radiosondes Meisei Electric Co., Ltd. RS Meisei RS2-91 Radiosonde Meisei Electric Co., Ltd. RS80 34 Vaisala RS80 Vaisala RS Vaisala RS80-15 Vaisala RS90-FN 54 Vaisala RS90-FN Vaisala SRS-C34 15 MeteoLabor SRS-C34 MeteoLabor ECC-ENSCI 1 EnSci ECC ozone module EN-SCI Corporation ENSCI-Z 210 ECC EnSci-Z Ozone sondes EN-SCI Corporation SPC-6a 205 Science Pump ECC SPC-6a Science Pump Corporation CFH-IMET 89 Cryogenic Frostpoint Hygrometer (linked to IMET) CFH-RS80 26 Cryogenic Frostpoint Hygrometer (linked to RS80) FPH 12 Frost Point Hygrometer Frostpoint hygrometer SW-D 10 SnowWhite Day MeteoLabor COBALD 44 Compact Optical Backscatter AeroloL Detector (COBALD) ETH Zürich FLASH-B 7 Flash B Central Aerological Observatory MTR-C10 12 Meisei Temperature Reference (tangsten) radiosonde C10 Meisei Electric Co., Ltd. MTR-08S 8 MTR Sensor 08 (none transmitter) Other special Meisei Electric Co., Ltd. RRD Vaisala Humidity Reference Sensor Module Vaisala RR01-C10 12 Vaisala Reference Radiosonde 1 (C10) sensors/sondes Vaisala 1-UNKNOWN 4 unknown radioactivity sonde 3THERM-LMS6 M. 11Sommer Three Thermistor Radiosonde De Bilt, (3THERM) NL p at 4LMS6 Radiosonde Lockheed Martin Sippican, Inc.
5 RS92 GRUAN Data Product RS92-GDP Version 2 Second release version of first GRUAN data product Processing started in August 2012 All archived RS92 launches are re-processed Documentation GRUAN website GRUAN-TD-4, v1.1 ( ) Brief Description of RS92-GDP Peer-reviewed article writing in progress Dissemination at NCDC ftp://ftp.ncdc.noaa.gov/pub/data/gruan/level2/rs92-gdp/version-002 Distribution for GRUAN internal purposes at DWD Please contact the M. Sommer De Bilt, NL p 5
6 Processing of RS92 data Initialisation Get data file Get meta-data Consistency check Data Preparation Processing Verify GC Calc PTU Calc Uncertainties QC of PTU Bad Checked Approved M. Sommer De Bilt, NL p 6
7 Radiosonde launches (with RS92) Station Scheduling Year s Quota Barrow / day 730 Boulder / week 52 Cabauw / day 60 Lamont (SGP) / day 1460 Lindenberg / day 1460 Manus / day 730 Nauru / day 730 Ny-Ålesund / day 365 Payerne / week 52 Potenza / week 52 Sodankylä / day 730 Tateno / day 730 Summary Total RS launches: 22,302 M. Sommer De Bilt, NL p 7
8 Collected launches 2012 (with RS92) Stored raw data and meta-data Station Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Month s Quota Barrow Boulder Cabauw Lamont Lindenberg Manus Nauru Ny-Ålesund Payerne Potenza Sodankylä Tateno Summary Total RS launches of 2012: 8,334 M. Sommer De Bilt, NL p 8
9 RS92-GDP v2 Available at NCDC (only approved) Station Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Available Barrow % Boulder % Cabauw % Lamont % Lindenberg % Manus % Nauru % Ny-Ålesund % Payerne % Potenza % Sodankylä % Tateno % Summary Available RS92 launches of 2012: 4, % M. Sommer De Bilt, NL p 9
10 Result status % 90% 80% 3 70% 60% 50% 40% 30% 2 Approved Checked Bad Unknown 20% 10% 0% 1 BAR BOU CAB LIN MAN NAU NYA PAY POT SGP SOD TAT M. Sommer De Bilt, NL p 10
11 Quality example 1 Lindenberg Failed AddQC of press Failed AddQC of temp Failed AddQC of rh Failed BasisQC of press Failed BasisQC of temp Bad press sensor Bad temp sensor Bad rh sensor Inconsistent GC data Tropopause not reached No ground check Bad data Unkwnown error Lindenberg 2012 (Status BAD) There are more than 30 reasons for don't become approved. 176 BAD total: M. Sommer De Bilt, NL p 11
12 Lindenberg 2 Bad pressure sensor Why? Too large correction: p correction > 1.5 hpa Is it a real calibration issue? Bad RH sensor Why? Inconsistent meta-data Reason Manual fill in of SHC data Swap two values: T + RH Solution Improved RsLaunchClient Automatical logging of additional ground check data (SHC) M. Sommer De Bilt, NL p 12
13 Quality example 2 Cabauw (De Bilt) Range with no correct data product Reason Inconsistent meta-data Corrupt data file (DC3DB) Bug in DC3 configuration Solution Repaired at site Version 2 can not handle it Future version YES M. Sommer De Bilt, NL p 13
14 Quality example 3 Manus Dynamo campaign 2012 M. Sommer De Bilt, NL p 14
15 Manus Reasons of quality issues Manus 2012 (Status CHECKED) Failed AddQC of press 72 Failed AddQC of temp 7 Failed AddQC of rh 712 Failed BasisQC of press Failed BasisQC of temp Bad press sensor Bad temp sensor CHECKED total: 720 Bad rh sensor Inconsistent GC data Tropopause not reached 8 No ground check Bad data Unkwnown error M. Sommer De Bilt, NL p 15
16 Manus Reasons of quality issues Manus 2012 (Status BAD) Failed AddQC of press 333 Failed AddQC of temp 137 Failed AddQC of rh 333 Failed BasisQC of press 12 Failed BasisQC of temp 12 Bad press sensor Bad temp sensor BAD total: 421 Bad rh sensor 10 Inconsistent GC data Tropopause not reached 5 No ground check 316 Bad data 13 Unkwnown error M. Sommer De Bilt, NL p 16
17 Often detected data quality issues Missing ground checks Checked 1 Additional quality checks not passed Checked 3 Bad sensors (RH, T, p, GPS) Bad 2 Inconsistent meta-data Bad Corrupt data files Bad 100 hpa is not reached Bad M. Sommer De Bilt, NL p 17
18 Missing ground check GC25 is not a check it is a re-calibration No correction add additional uncertainties Pressure [hpa] 1.5 Temperature [K] 0.4 Relative Humidity [%] 4.0 Temperature corrections from GC25 (Manus 2012) M. Sommer De Bilt, NL p 18
19 Bad sensors Detect bad sensors using ground check corrections abs(sonde reference) > limit = bad sensor Limits for GC corrections Variable Limit Pressure [hpa] 1.5 Temperature [K] 1.0 Relative Humidity [%] 2.0 Diff. RH (U1 U2) [%] 1.5 M. Sommer De Bilt, NL p 19
20 Additional quality checks Check, if uncertainty is in the specification from manufacturer count(u < U spec ) / count(data points) > 94% U spec,rh = Limit U abs,rh + RH corrected * Limit U rel,rh yes no Approved Checked U spec,t = Limit U abs,t U spec,p = Limit U abs,p + p corrected * Limit U rel,p Used limits Limit U abs Limit U rel RH [1] * T [K] 0.5 * p [hpa] 0.6 * * Given by manufacturer M. Sommer De Bilt, NL p 20
21 Example for relative humidity RH (corrected) RH (uncorrected) U rh U spec,rh = Limit U abs,rh + RH corrected * Limit U rel,rh Limit U abs,rh Limit U rel,rh U rh > U spec,rh green < 94% Add-QC not passed M. Sommer De Bilt, NL p 21
22 Example for temperature U T > U spec,t green < 94% Add-QC not passed T (corrected) T (uncorrected) U T U spec,t = Limit U abs,t Limit U abs,t 0.5 K M. Sommer De Bilt, NL p 22
23 Example for pressure p pressure derived from GPS U p U spec,p = Limit U abs,p + p corrected * Limit U rel,p Limit U abs,p Limit U rel,p 0.6 hpa U p > U spec,p pressure derived from pressure sensor green < 94% Add-QC not passed M. Sommer De Bilt, NL p 23
24 What have we learnt? Sites should have a special attention to meta-data Especially in case of manual fill in Informing LC early enough about changes in instrumentation LC should give a (fast) feedback to sites Sites should follow the standard procedures Ground check Collecting (and archiving) of RAW data is very important Re-processing is possible and sometimes necessary Task for improving the quality checks Need more feedback from users of GRUAN data M. Sommer De Bilt, NL p 24
25 Conclusion Currently data-flow includes only radiosounding Large number of launches are stored (raw data + meta-data) Not only RS92 Release version of first GRUAN data product (RS92) is available At moment approx. 50 % of RS92 data is approved available at NCDC Quality monitoring is very important Much to learn for future developments Need feedback from users Thank you for your attention. M. Sommer De Bilt, NL p 25
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