{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,24]],"date-time":"2026-03-24T14:01:52Z","timestamp":1774360912868,"version":"3.50.1"},"reference-count":42,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2019,3,6]],"date-time":"2019-03-06T00:00:00Z","timestamp":1551830400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"European Union\u2019s Horizon 2020 Programme for Research and Innovation","award":["638822"],"award-info":[{"award-number":["638822"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>To date, there is no long-term, stable, and uncertainty-quantified dataset of upper tropospheric humidity (UTH) that can be used for climate research. As intermediate step towards the overall goal of constructing such a climate data record (CDR) of UTH, we produced a new fundamental climate data record (FCDR) on the level of brightness temperature for microwave humidity sounders that will serve as basis for the CDR of UTH. Based on metrological principles, we constructed and implemented the measurement equation and the uncertainty propagation in the processing chain for the microwave humidity sounders. We reprocessed the level 1b data to obtain newly calibrated uncertainty quantified level 1c data in brightness temperature. Three aspects set apart this FCDR from previous attempts: (1) the data come in a ready-to-use NetCDF format; (2) the dataset provides extensive uncertainty information taking into account the different correlation behaviour of the underlying errors; and (3) inter-satellite biases have been understood and reduced by an improved calibration. Providing a detailed uncertainty budget on these data, this new FCDR provides valuable information for a climate scientist and also for the construction of the CDR.<\/jats:p>","DOI":"10.3390\/rs11050548","type":"journal-article","created":{"date-parts":[[2019,3,7]],"date-time":"2019-03-07T10:52:22Z","timestamp":1551955942000},"page":"548","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":16,"title":["An Uncertainty Quantified Fundamental Climate Data Record for Microwave Humidity Sounders"],"prefix":"10.3390","volume":"11","author":[{"given":"Imke","family":"Hans","sequence":"first","affiliation":[{"name":"Meteorologisches Institut, Centrum f\u00fcr Erdsystem- und Nachhaltigkeitsforschung (CEN), Universit\u00e4t Hamburg, Bundesstrasse 55, 20146 Hamburg, Germany"}]},{"given":"Martin","family":"Burgdorf","sequence":"additional","affiliation":[{"name":"Meteorologisches Institut, Centrum f\u00fcr Erdsystem- und Nachhaltigkeitsforschung (CEN), Universit\u00e4t Hamburg, Bundesstrasse 55, 20146 Hamburg, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6389-1160","authenticated-orcid":false,"given":"Stefan A.","family":"Buehler","sequence":"additional","affiliation":[{"name":"Meteorologisches Institut, Centrum f\u00fcr Erdsystem- und Nachhaltigkeitsforschung (CEN), Universit\u00e4t Hamburg, Bundesstrasse 55, 20146 Hamburg, Germany"}]},{"given":"Marc","family":"Prange","sequence":"additional","affiliation":[{"name":"Meteorologisches Institut, Centrum f\u00fcr Erdsystem- und Nachhaltigkeitsforschung (CEN), Universit\u00e4t Hamburg, Bundesstrasse 55, 20146 Hamburg, Germany"}]},{"given":"Theresa","family":"Lang","sequence":"additional","affiliation":[{"name":"Meteorologisches Institut, Centrum f\u00fcr Erdsystem- und Nachhaltigkeitsforschung (CEN), Universit\u00e4t Hamburg, Bundesstrasse 55, 20146 Hamburg, Germany"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8640-8810","authenticated-orcid":false,"given":"Viju O.","family":"John","sequence":"additional","affiliation":[{"name":"EUMETSAT, Eumetsat Allee 1, 64295 Darmstadt, Germany"}]}],"member":"1968","published-online":{"date-parts":[[2019,3,6]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"4906","DOI":"10.1002\/jgrd.50358","article-title":"Assessment of inter-calibration methods for satellite microwave humidity sounders","volume":"118","author":"John","year":"2013","journal-title":"J. Geophys. Res."},{"key":"ref_2","unstructured":"Hanlon, H., and Ingram, W. (2019, March 06). Available online: www.cmsaf.eu."},{"key":"ref_3","unstructured":"Ferraro, R. (2016). AMSU-B\/MHS Brightness Temperature\u2014Climate Algorithm Theoretical Basis Document, NOAA Climate Data Record Program CDRP-ATBD-0801 Rev. 1, Technical report."},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Zou, C.Z., Goldberg, M.D., Cheng, Z., Grody, N.C., Sullivan, J.T., and Tarpley, D. (2006). Recalibration of microwave sounding unit for climate studies using simultaneous nadir overpasses. J. Geophys. Res., 111.","DOI":"10.1029\/2005JD006798"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"6617","DOI":"10.5194\/amt-11-6617-2018","article-title":"Radiometric correction of observations from microwave humidity sounders","volume":"11","author":"Moradi","year":"2018","journal-title":"Atmos. Meas. Tech."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"2303","DOI":"10.1175\/JTECH-D-13-00001.1","article-title":"Intercalibrating microwave satellite observations for monitoring long-term variations in upper and mid-tropospheric water vapor","volume":"30","author":"Chung","year":"2013","journal-title":"J. Atmos. Ocean. Technol."},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Shi, L., and Bates, J.J. (2011). Three decades of intersatellite-calibrated High-Resolution Infrared Radiation Sounder upper tropospheric water vapor. J. Geophys. Res., 116.","DOI":"10.1029\/2010JD014847"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"2874","DOI":"10.1002\/2015JD024496","article-title":"An assessment of the consistency between satellite measurements of upper tropospheric water vapor","volume":"121","author":"Chung","year":"2016","journal-title":"J. Geophys. Res."},{"key":"ref_9","unstructured":"Wentz, F.J., Mears, C.A., and Program, N.C. (2013). NOAA Climate Data Record (CDR) of SSM\/I and SSMIS Microwave Brightness Temperatures, RSS Version 7."},{"key":"ref_10","unstructured":"Kummerow, C.D., Berg, W.K., Sapiano, M.R.P., and Program, N.C. (2013). NOAA Climate Data Record (CDR) of SSM\/I and SSMIS Microwave Brightness Temperatures, CSU Version 1."},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Berg, W., Kroodsma, R., Kummerow, C.D., and McKague, D.S. (2018). Fundamental Climate Data Records of Microwave Brightness Temperatures. Remote Sens., 10.","DOI":"10.3390\/rs10081306"},{"key":"ref_12","unstructured":"Fennig, K., Schr\u00f6der, M., and Hollmann, R. (2019, March 03). Available online: www.cmsaf.eu."},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"Zou, C.Z., and Wang, W. (2011). Intersatellite calibration of AMSU-A observations for weather and climate applications. J. Geophys. Res., 116.","DOI":"10.1029\/2011JD016205"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"205","DOI":"10.1016\/j.rse.2014.04.009","article-title":"Inter-satellite calibration of the NOAA AMSU-A measurements over tropical oceans","volume":"149","author":"Mo","year":"2014","journal-title":"Remote Sens. Environ."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"1056","DOI":"10.1109\/TGRS.2012.2228654","article-title":"Overview of Intercalibration of Satellite Instruments","volume":"51","author":"Chander","year":"2013","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_16","unstructured":"NOAA (2019, March 06). NOAA KLM User\u2019s Guide with NOAA-N, -N\u2019 Supplement, Available online: https:\/\/www.noaa.gov\/."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"917","DOI":"10.1016\/j.asr.2016.11.017","article-title":"Characterisation of Special Sensor Microwave Water Vapor Profiler (SSM\/T-2) radiances using radiative transfer simulations from global atmospheric reanalyses","volume":"59","author":"Kobayashi","year":"2016","journal-title":"Adv. Space Res."},{"key":"ref_18","unstructured":"Labrot, T., Lavanant, L., Whyte, K., Atkinson, N., and Brunel, P. (2019, March 06). Available online: https:\/\/www.nwpsaf.eu\/site\/."},{"key":"ref_19","unstructured":"Woolliams, E., Mittaz, J., Merchant, C.J., and Harris, P. (2019, March 06). Available online: www.npl.co.uk\/."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"760","DOI":"10.1109\/22.375222","article-title":"The Radiometric Characterization of AMSU-B","volume":"43","author":"Saunders","year":"1995","journal-title":"IEEE Trans. Microw. Theory Tech."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"405","DOI":"10.1109\/36.485118","article-title":"Measurements of the AMSU-B Antenna Pattern","volume":"34","author":"Hewison","year":"1996","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_22","unstructured":"Klaes, D., and Ackermann, J. (2019, March 06). Available online: https:\/\/www.eumetsat.int\/."},{"key":"ref_23","first-page":"276","article-title":"Initial evaluation of AMSU-B in-orbit data","volume":"3503","author":"Atkinson","year":"1998","journal-title":"Proce. SPIE Int. Soc. Opt. Eng."},{"key":"ref_24","unstructured":"Atkinson, N.C. (2000). Performance of AMSU-B Flight Model 2 (FM2) During NOAA-L Post Launch Orbital Verification Tests, AMB112, Technical Report."},{"key":"ref_25","unstructured":"Atkinson, N.C. (2002). Performance of AMSU-B Flight Model 3 (FM3) During NOAA-M Post Launch Orbital Verification Tests, AMB113, Technical Report."},{"key":"ref_26","unstructured":"Hewison, T.J. (1991). A Thermal Model of Black Body Targets."},{"key":"ref_27","unstructured":"JPSS ATMS SDR Science Team (2013). Joint Polar Satellite System (JPSS) Advanced Technology Microwave Sounder (ATMS) SDR Calibration Algorithm Theoretical Basis Document (ATBD), Technical Report."},{"key":"ref_28","unstructured":"Burgdorf, M., Hans, I., Prange, M., Mittaz, J., and Woolliams, E. (2017). D2.2 Microwave: Report on the MW FCDR Uncertainty, Universit\u00e4t Hamburg, National Physical Laboratory. Technical Report."},{"key":"ref_29","unstructured":"Khan, S., and Shaw, G. (1999). PFM Radiometric Calibration Test Report, MHS-TR-JA281-MMP, MATRA MARCONI SPACE UK Limited. Technical Report."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"117","DOI":"10.1016\/S0273-1177(01)00312-X","article-title":"Calibration, monitoring and validation of AMSU-B","volume":"28","author":"Atkinson","year":"2001","journal-title":"Adv. Space Res."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"1536","DOI":"10.1002\/jgrd.50154","article-title":"Monitoring scan asymmetry of microwave humidity sounding channels using simultaneous all angle collocations (SAACs)","volume":"118","author":"John","year":"2013","journal-title":"J. Geophys. Res."},{"key":"ref_32","unstructured":"Hans, I., Burgdorf, M., and Buehler, S.A. On-board radio frequency interference as origin of inter-satellite biases for microwave humidity sounders, Unpublished, in preparation."},{"key":"ref_33","unstructured":"Hans, I., Burgdorf, M., and Woolliams, E. (2019). Product User Guide\u2014Microwave FCDR Release 4.1, Universit\u00e4t Hamburg and National Physical Laboratory. Techreport."},{"key":"ref_34","doi-asserted-by":"crossref","unstructured":"Fixsen, D.J. (2009). The temperature of the cosmic microwave background. Astrophys. J., 707.","DOI":"10.1088\/0004-637X\/707\/2\/916"},{"key":"ref_35","unstructured":"Joint Committee for Guides in Metrology (JCGM) (2018, July 15). Evaluation of Measurement Data\u2014Guide to the Expression Of Uncertainty in Measurement (GUM) JCGM 100:2008. Available online: http:\/\/www.bipm.org\/en\/publications\/guides."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"4927","DOI":"10.5194\/amt-10-4927-2017","article-title":"Noise performance of microwave humidity sounders over their life time","volume":"10","author":"Hans","year":"2017","journal-title":"Atmos. Meas. Tech."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"2477","DOI":"10.1109\/LGRS.2015.2485945","article-title":"Use of Allan Deviation for Characterizing Satellite Microwave Sounder Noise Equivalent Differential Temperature (NEDT)","volume":"12","author":"Tian","year":"2015","journal-title":"IEEE Geosci. Remote Sens. Lett."},{"key":"ref_38","unstructured":"Merchant, C.J., Woolliams, E., and Mittaz, J. (2017). Uncertainty and Error Correlation Quantification for FIDUCEO easyFCDR Products: Mathematical Recipes, v0.9, University of Reading, National Physical Laboratory. Technical Report."},{"key":"ref_39","unstructured":"NOAA-OSPO (2017, December 14). POES Operational Status Webpage, Available online: http:\/\/www.ospo.noaa.gov\/Operations\/POES\/status.html."},{"key":"ref_40","doi-asserted-by":"crossref","unstructured":"Burgdorf, M., Hans, I., Prange, M., Lang, T., and Buehler, S.A. (2018). Inter-channel uniformity of a microwave sounder in space. Atmos. Meas. Tech., 11.","DOI":"10.5194\/amt-2017-405"},{"key":"ref_41","unstructured":"Giering, R., Quast, R., Mittaz, J., Hunt, S., Harris, P., and Wooliams, E. (2019). Harmonisation of fundamental satellite data records. Remote Sens., in preparation."},{"key":"ref_42","doi-asserted-by":"crossref","unstructured":"Burgdorf, M. (2019). Disk-Integrated Lunar Brightness Temperatures Between 89 and 190 GHz. Adv. 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