no. 04/2005 Remote sensing report Remote sensing Open Restricted Confidential !! " % $ # "$ & ' ( ) * $ ## " " + , $ ## -" $ . / $ . " $ . + , / $ $ ) * $ * *0 $ $ ( $ # " $$ . # 0 .$ $ +! ! * $ * !! , / 0 *# * - . 1 ." 2 $ $# # " $ $ * ) * $ 3" $ 2" $ / $ ( $ # # $ $/ $ $0 $ # " " !! # "$ $ # " 0$ / $ $ . " " $ + 1 34, / # $ ( $ $ . " $ ) * $ !! " # "$ 0 " " . " " $5 0 $ " / " $$ " " # $ 6 * $ .5 7665) * $ 5 5 -" $ .5 !! 5 08 " / " $$ " 5 / ! 999999999999999999999999999999999 4 $ +7 " $: 6 * 999999999999999999999999999999999 /; % $ $ ., 6 $ Postal address P.O Box 43 Blindern N-0313 OSLO Norway Office Niels Henrik Abels vei 40 Telephone +47 2296 3000 Telefax +47 2296 3050 " 7 / +< " < / #* e-mail: [email protected] internet: met.no < # Bank account 7694 05 00601 * , Swift code DNBANOKK report no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able 1 NWCSAF PPS cloud mas numbers and description. A # " $$ $ " " $ - 0 $ # 0 + 0 *" ,5 * $ $" 0 " * Page 1 re po r t no . 04 / 20 05 - 2" " * B A " $$ 2 " / " $$ " / 0 766 " $5 0$ / . * 5 ! *# $ $ " C ! $ " $$ . * $# "/ # $ 2 ? $ . / * 5$ " # 0 $ $ * $;$ $ ( * . $ $ $ * ? $/ $ / $ * # # " $$ . . # $ / $ $# " " $" 0 . ? * $ $ < 00 + 5 05 5 0, !&) # " $$ $, !! $ $ " " $$ $ 766 " $$ $ $ ( $ ./ # . $ / " ( 0 ( $ # $ 2 @ $ + " " * $; $ ." Table 2 Class number and description of the NWCSAF PPS cloud type product. A # " $$ $ -" * B D C 2" " * $ -" $ $ * -" $ " * 4 -" $ $ 4 -" $ " * * * / " $ $ 1 * / " $E" * 7. # @ " $ $ 7. # @ " $E" * . # @ " $ $ . # @ " $ " * B ( " * * * * * $ $ $$ # " * $ D ( "; " Page 2 * 1 " C * *# $ " $ -" $ report no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age 3 re po r t no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age 4 " # # " $$ . " * $; # " " # # "5 3 2 # 8 " * , ( # $ $ " # $ 2" $$ $ 0 $ +<2 , " $ # " 0$ / $5 5 " * $; " $$ $ $ -$ " $# - " " $$ $ ." $ # . ( 0 12 0 # $ # $ - . $ $ " # " " $ $0 / 0 * " " $ # " ! 766 3" " / > A( " # # " * $ * . 50 - " $$ $ $ # "$ ( 0 # $ 2 $ report no. 04/2005 <2 " + * # $ ." /$ " $ $ $ - $ 12, * $- " * Figure 1 Cloud mask output from the NWCSAF PPS software as implemented at NMI. $ % $# * $ . * " $ $ * + 1 34, - " " $ $5 766 4 / 5 !! " # " $# * $ . 0 - " . 1 34 / +& ' 5 0, ( " " 08 " $ $ " $ *$ # " 7264 1 ! # * $ - " $ $ 7< * Page 5 re po r t no . 04 / 20 05 - " # # $ "" $$ 0 " $ * $ $ " $ - 6 +6 < / #* ( *5 , $ . Figure 2 Cloud type output of the NWCSAF PPS software as implemented at NMI. 2 / " $ 0 # $ $/ # " $$ 8 0 - $ $ $ " $ " " # " $$ )?" # " 0 / $ # $ @ " # " $$ ( * ? * * * " - 2 " *# $ $ " - 0 6 " # " $$ . * . * 8 $$ $ * / 0 $ !! " !! < $, 0 . 1 34 7< . Page 6 " $" @ " " . * / # $ $ +" $ " $ 0 # / . # " $$ . " $ $ * ?* * * " - $# * 08 " $ 0 $ - $ 1 34 / 5 $ * ? * 7< $ $ " / . * $5 0 $ " $ . . / # . ** . report no. 04/2005 ( B * # / $ 0 . ? * $" $ - - 0 . C < . $# $ " $ $" 5 - . $ # "$ $$ / ( $ ( 0 1 $ $ $ $ / * " 0$ / $5 0 $ * ; 0 .$* * / 7 - / 5 $ / 0 $ # # $ $ $$ $ $ $ .$* * / 0 $ / " # "$ $ / $ $ $ / 0 $ ( $ $" / * $ - 5 * $ 5$ * $ $ # $$ * # " * $ $ Table 3 Stations used in the NWCSAF PPS validation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age 7 re po r t no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age 8 "; " * * " , "" . * < 00 * " $$ $ *# * " $ ( * . $ $ * $ $ 0 / # "- " $ 0 / $ 50 * $ " $ 0$ / . / " $5 " " $ * / $ * # 0 *$ . . $ $ # $ 0 " # $5 " $$ $ +# $ " ** , !! @ * * *$ 0 @ / " $$ " ( ## # $ -$ . " $5 $ 0/ $ . $ $ *0 " ( $ *# $ / -$ # "" # $ # $ . " ./ " ** $ $ # "$ $ $5 0 $ - report no. 04/2005 ( - # $*$ - $ -$ # . $ $ * $" " - $ / * $ $ * / " $ $ $ 50 $ . " 10000 4000 0 Frequency N=0 0 5 10 15 20 NWCSAF PPS cloud type index 0e+00 4e+04 8e+04 Frequency N=8 0 5 10 15 20 NWCSAF PPS cloud type index Figure 3 Validation results for clear and overcast situations. See Table 2 for textual description of class numbers. ( $ $ 0 / " $ " " 50 $$ ? $# " " $ / 0 #> --- 0 * . / $5 * $$ $5 $ *$ " . " 0 ./ ( ( @ "" / * $ $ " +)I + ,, - " $" 0 $ $ * / 0 " / / @ 0* " " " 0 0 $ . / $ / 0 / $ 0 / @ / / " # $ +$# $ 0 9- 09# . * , ? !! " # - . 13 * " $ $ " *# . " " " $ * $ +$ 0 " $ , + , : $ $" +)I + ,, - " 0$ / " . $ +$ $ $ 0 " $ @ " " . $ " *# *0 , + , Page 9 re po r t no . 04 / 20 05 ! 0 0 +$ 0 " $ " , +)I + ,, - " $ - - * $ " . $ + , $ " $ * , +)I + ,, - " $ - * $ - . " $ +$ ! 0 + , Table 4 Contingency table representing the relation between satelite classification and synoptic observation of cloudy or clear areas. B B D D &/ $ $ ( 0 0 C 5 # 0 0 " *# 0 / # " . )I + , + , $ C " $ " " $ "" BC " $ " $ / " $ " # " 0$ / 0 * #? $ $ C 5 $ * 0 $ $ ( $ !! " ( ( " $ / * $ " 0 .$ &/ " # . " - / " # $ < . $$ $ ( $ 0 .$5 . @ " # 7< $5 " * $ *#$ $ # " # $ $ " " / 0 " " $ " * .$ $" 0 0 / . . " " . 0 # $ - . ( $5 . .5 0 * 5 $ $$ $ . - ( $ # " # # * 0 * 0$ / $ $ - $ " 50 " $ $ 0 $ 0$ / 3 $0 $ / . $ " / * . . " $ Page 10 $# * $ . $ / $ 1 34 " " $ $$ 0 .$ $ / 0 " *# * $$ . . $ + * . " / . ,5 " $ . $ !! # "$ / 0 " " 7 - / 5 # $ " $ $ $ / $ $ * 0 " " $# " 0$ / / / $ $. !! $ # * #? $" # $ $" 0 $ $# 5 $ / -#? . * " 0 - @ " *# ? $ # " # 0$ / . ( / $ * " 0$ / $ " $ * # 0 $ ( $ $" $ @ * - * * report no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age 11 re po r t no . 04 / 20 05 100 50 0 Frequency 150 N=8 and only low clouds 0 5 10 15 20 NWCSAF PPS cloud type index 600 200 0 Frequency N=8 and only medium clouds 0 5 10 15 20 NWCSAF PPS cloud type index Figure 4 Validation results for cloudy situations containing only low and medium level clouds (upper and lower panel respectively). See Table 2 for textual description of class numbers. ) ( $$ $$ !! " # . / $ . " - $ * $" $$ ." #? $ $" ( / " $ $ *$ 0 . $ * * " $ +" $ 0 / , * " - $ " $$ . " #? $ $ " $ $ 0$ / 5 0 " *# *0 # ? $ $ # 0 * $ *$ 0 $$ ( " " * $" $$ " $ 2 & ' + 5 , ( $ $ *# * 12 ) * $ !! < $ " * ( $- *# * " Page 12 $ $# $ " " - " " # $* $ " 0 $ * # 0 *$ 0 $" 766 # " $$ . 12 $0 0 $ . 766 * G .$0 . # " " 1)3 7 - / 5 - *# * 766 # " $$ . 0 $ # $ 1 ." 2 $ < 1 !$ / 0 # * / * # 0 *$ " # $ $ ( $ $ - " " $ # 0 *$ " $ F report no. 04/2005 / / 0 # * / / ? (# "$ ( $" $ $ 12 " 5 0 # $ - " $/ ? $ *# 0 # * 3 2 # 0e+00 4e+04 8e+04 Frequency N=8 and high clouds 0 5 10 15 20 NWCSAF PPS cloud type index 150 50 0 Frequency N=8 and high thin clouds 0 5 10 15 20 NWCSAF PPS cloud type index Figure 5 Validation results of cloudy situations containing only high level clouds (upper and lower panel shows all high level clouds and only thin Cirrus respectively). See Table 2 for textual description of class numbers. Page 13 re po r t no . 04 / 20 05 Bjørge, D., Haugen, J. E., Homleid, M., Vignes, O., and Ødegaard, V., 2003: Updating the HIRLAM numerical weather prediction system at met.no 2000-2002, DNMI Research Report, No. 145, , ISSN 0332-9879, Norwegian Meteorological Institute, Oslo, Norway, 7 March 2003, 25pp. Christoffersen, A., Foss, A., Godøy, Ø., Korsmo, H., and Schulze, J., 2003: Interactive collocation of AVHRR training data, DNMI Research Note, No. 93, ISSN 0332-9879, Norwegian Meteorological Institute, Oslo, Norway, 8pp. Dybbroe, A., K.-G. Karlsson, M. Moberg, and A. Thoss, 2000a: Scientific Report for the SAFNWC Mid Term Review, SAF/NWC/SMHI/MTR/SR/1 Issue 1.0, 21 February 2000, Swedish Meteorological and Hydrological Institute, SE-601 76 Norrkøping, Sweden, 148pp. Dybbroe, A., Thoss, A. and Karlsson K.-G., 2000b. The AVHRR & AMSU/MHS products of the Nowcasting SAF. Proceedings of the 2000 Eumetsat Meteorological Satellite Data Users’ Conference, Bologna, Italy, pp. 729-736. ISBN: 92-9110-037-4. Dybbroe, A., 2004: Improved navigation of Advanced Very High Resolution Radiometer data at high latitudes, SMHI-BPF/TEC/AVHRR/1, Version 1.0, 23 December 2004, Swedish Meteorological and Hydrological Institute, SE-601 76 Norrkøping, Sweden, 45pp. Dybbroe, A., Karlsson, K.-G. and Thoss, A., 2005a: NWCSAF AVHRR cloud detection and analysis using dynamic thresholds and radiative transfer modelling - part one: Algorithm description, Accepted for publication in J. Appl. Meteor. Dybbroe, A., Karlsson, K.-G. and Thoss, A., 2005b: NWCSAF AVHRR cloud detection and analysis using dynamic thresholds and radiative transfer modelling - part two: Tuning and validation, Accepted for publication in J. Appl. Meteor. Godøy,Ø., 2002: Validation of the SAFNWC PPS implementation at MI using similar products from SMHI, DNMI Research Note, No. 83, ISSN 0332-9879, Norwegian Meteorological Institute, Oslo, Norway, 12pp. Godøy,Ø., 2003a: Some remarks concerning AVHRR processing at the Norwegian Meteorological Institute, DNMI Research Note, No. 86, ISSN 0332-9879, Norwegian Meteorological Institute, Oslo, Norway, 12pp. Godøy, Ø., 2003b: Description of a collocation system for data from various meteorological observation and prediction systems, DNMI Research Note No. 86, ISSN 0332-9879, Norwegian Meteorological Institute, Oslo, Norway, 19pp. Karlsson, K.G., 1993: Comparison of operational AVHRR-based cloud features with surface observations. In: Proc. 6th European AVHRR Data Users' Meeting, belgirate, Italy, 28 June-3July, 1993, EUMETSAT pp. 223-230. Karlsson, K.G., 1995: Estimation of Cloudiness at High Latitudes from Multispectral Satellite Measurements, Ambio, Vol. 24, No. 1, Feb 1995, Royal Swedish Academy of Sciences 1995. R Development Core Team, 2004: R: A language and environment for statistical computing, Note 3900051-07-0, R Foundation for Statistical Computing, Vienna, Austria, 2004, http://www.R-project.org. Page 14
© Copyright 2026 Paperzz