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«CONTENTS Contents 1 Introduction 3 2 BUFR format 4 2.1 Indicator section......................................... ...»

-- [ Page 3 ] --

3.7.8 Subroutine BUBOX Purpose The expanded Bufr message can be very lengthy containing many bit maps referring backwards to the data.

This routine resolves bit maps for the user, returning two dimensional arrays containing the expanded observation and the corresponding applications (quality controls, statistics, differences e.t.c).

Every application appears as a new column. A new data are following each other in the first column, starting with the generating centre/application information.

Interface CALL BUBOX(KSUB,KSUP,KELEM,KWTR,CNAMES,CUNITS,KVALS, VALUES,KBOX,KAPP,KLEN,KBOXR,VALS,CBOXN,CBOXU, KERR)

where:

• Integer variables are denoted by first letter K.

• Real variable are denoted by first letter V.

• Character variables are denoted by first letter C.

Input arguments

• KSUB - An INTEGER containing subset number.

• KSUP - An INTEGER array size 9 containing supplementary information.

• KELEM - An INTEGER variable containing expected number of expanded. elements. It must be the same as used in BUFREX routine previously called.

• KWTR - An INTEGER array containing list of expanded Bufr table B reference numbers (KTDEXP output from BUSEL routine).

• CNAMES - A CHARACTER*64 array of KELEM words containing element names.

• CUNITS - A CHARACTER*24 array of KELEM words containing element units.

• KVALS - An INTEGER variable containing expected number of data values.

• VALUES - A REAL*8 array of KVALS words containing element values.

–  –  –

Output arguments

• KBOX - An INTEGER containing number of elements in first column of box.

• KAPP - An INTEGER containing number of applications

• KLEN - An INTEGER containing max index for number of rows. The next column starts at KLEN +1 element or index=i + (KAPP - 1)*KLEN to address any value in the box.

• KBOXR - An INTEGER array of 80000 containing Bufr table B reference numbers.

• VALS - A REAL*8 array of 80000 containing boxed values.

• CBOXN - A CHARACTER*64 array of 80000 containing boxed element names.

• CBOXU - A CHARACTER*24 array of 80000 containing boxed units.

• KERR - An INTEGER containing error code Method The expanded Bufr message is passed in the subroutine to resolve backward reference bit maps associating all applications to the particular element. The output arrays containing boxed data are one dimensional arrays containing information as two dimensional table.

The first column contains in first 6 rows reserved information and the original observation starts at the index

7. Columns 2- KAPP are different generating applications corresponding through bit maps to the data in the

column 1. Column 1 contains KLEN elements. Index to the i-th element can be calculated as:

index = i + (KAPP-1) * KLEN The first raw, columns 2 to KAPP contain quality control operators (222000, 225000 e.t.c) Rows 2 to 6, columns 2 to KAPP contain generating centre, generating application, statistics, incremental update number and minimisation simulation number respectively.

3.7.9 Subroutine BUPRTBOX Purpose Prints boxed expanded Bufr message.

Interface CALL BUPRTBOX(KBOX,KAPP,KLEN,KBOXR,VALS,CBOXN,CBOXU) Input arguments

• KBOX - An INTEGER containing number of elements in first column of box.

• KAPP - An INTEGER containing number of applications

• KLEN - An INTEGER containing max index for number of rows. The next column starts at KLEN +1 element or index=i + (KAPP –1)*KLEN to address any value in the box.

• KBOXR - An INTEGER array containing Bufr table B reference numbers.

• VALS -A REAL*8 array containing boxed values.

• CBOXN -A CHARACTER*64 array containing boxed element names.

• CBOXU - A CHARACTER*24 array containing boxed units.

Output arguments

–  –  –

3.8 Performance The speed to decode Bufr messages is proportional to the number of messages. Since the same number of the same kind of observations can be packed into Bufr form in many ways, it is recommended to use multi subsets in compressed form when- ever possible. To get the best performance from the software it is recommended

that:

• The input file for expansion should contain Bufr messages sorted according to their types.

• Avoid usage of delayed data descriptor replication factors if possible.

• Avoid usage of Operator 203yyy to change reference values.

• Encode data into Bufr form in multi subset compressed form.

Here are some figures of real times used on IBM RS600, single processor computer to expand:

• All conventional data for one analysis cycle (56945 Bufr messages, 197696 subsets) 18 seconds.

• All AIRS data for one analysis cycle (70 Mbytes, 7775 bufr messages with 80563 subsets) 122 seconds.

–  –  –

4 Quality control in BUFR A quality control information in the Bufr shall be represented using Quality control operators from the Bufr Table C. Table 9 contains definition of possible operators and their usage.





Table 9: Bufr Tables C quality control operators

–  –  –

4.1 Quality control example Bufr message containing analysis feedback data was expanded. List of descriptors in the section 3 shows how to use quality control operators to represent various quality controls and statistics. The output contains

following information:

–  –  –

Your path for bufr tables is :

/home/ma/maa/bigtmp/wmo_bufr_crex_000250/bufr_000270/bufrtables BUFR TABLES TO BE LOADED B0000000000098006001,D0000000000098006001 BUFR SECTION 0

–  –  –

58 001031 IDENTIFICATION OF ORIGINATING/GENERATING CENTRE 59 001032 GENERATING APPLICATION 60 033220 VARIATIONAL ANALYSIS REPORT EVENTS (1) 61 033232 REPORT BLACK LIST EVENTS 62 033222 VARIATIONAL ANALYSIS AIREP EVENTS (2) 63 033233 VARIATIONAL ANALYSIS REPORT STATUS 64 235000 CANCEL BACKWARD DATA REFERENCE 65 001031 IDENTIFICATION OF ORIGINATING/GENERATING CENTRE 66 001032 GENERATING APPLICATION 67 007004 PRESSURE 68 011003 U-COMPONENT 69 011004 V-COMPONENT 70 010195 HEIGHT(HIGH ACCURACY) 71 012001 TEMPERATURE/DRY BULB TEMPERATURE 72 222000 QUALITY INFORMATION FOLLOW 73 236000 BACKWARD REFERENCE BIT MAP 74 031031 DATA PRESENT INDICATOR 75 031031 DATA PRESENT INDICATOR 76 031031 DATA PRESENT INDICATOR 77 031031 DATA PRESENT INDICATOR 78 031031 DATA PRESENT INDICATOR 79 001031 IDENTIFICATION OF ORIGINATING/GENERATING CENTRE 80 001032 GENERATING APPLICATION 81 033209 VARIATIONAL ANALYSIS FINAL FLAG 82 033209 VARIATIONAL ANALYSIS FINAL FLAG 83 033209 VARIATIONAL ANALYSIS FINAL FLAG 84 033209 VARIATIONAL ANALYSIS FINAL FLAG 85 033209 VARIATIONAL ANALYSIS FINAL FLAG 86 222000 QUALITY INFORMATION FOLLOW 87 237000 USE PREVIOUSLY DEFINED BIT MAP 88 001031 IDENTIFICATION OF ORIGINATING/GENERATING CENTRE 89 001032 GENERATING APPLICATION 90 033208 VARIATIONAL ANALYSIS FIRST QUESS CHECK FLAG 91 033208 VARIATIONAL ANALYSIS FIRST QUESS CHECK FLAG 92 033208 VARIATIONAL ANALYSIS FIRST QUESS CHECK FLAG 93 033208 VARIATIONAL ANALYSIS FIRST QUESS CHECK FLAG 94 033208 VARIATIONAL ANALYSIS FIRST QUESS CHECK FLAG 95 222000 QUALITY INFORMATION FOLLOW 96 237000 USE PREVIOUSLY DEFINED BIT MAP 97 001031 IDENTIFICATION OF ORIGINATING/GENERATING CENTRE 98 001032 GENERATING APPLICATION 99 033207 VARIATIONAL ANALYSIS DEPARTURE FLAG 100 033207 VARIATIONAL ANALYSIS DEPARTURE FLAG 101 033207 VARIATIONAL ANALYSIS DEPARTURE FLAG 102 033207 VARIATIONAL ANALYSIS DEPARTURE FLAG 103 033207 VARIATIONAL ANALYSIS DEPARTURE FLAG 104 222000 QUALITY INFORMATION FOLLOW 105 237000 USE PREVIOUSLY DEFINED BIT MAP 106 001031 IDENTIFICATION OF ORIGINATING/GENERATING CENTRE 107 001032 GENERATING APPLICATION 108 033206 VARIATIONAL ANALYSIS QUALITY CONTROL FLAG 109 033206 VARIATIONAL ANALYSIS QUALITY CONTROL FLAG 110 033206 VARIATIONAL ANALYSIS QUALITY CONTROL FLAG 111 033206 VARIATIONAL ANALYSIS QUALITY CONTROL FLAG 112 033206 VARIATIONAL ANALYSIS QUALITY CONTROL FLAG 113 222000 QUALITY INFORMATION FOLLOW 114 237000 USE PREVIOUSLY DEFINED BIT MAP 115 001031 IDENTIFICATION OF ORIGINATING/GENERATING CENTRE 116 001032 GENERATING APPLICATION 117 033205 VARIATIONAL ANALYSIS BLACK LIST FLAG 118 033205 VARIATIONAL ANALYSIS BLACK LIST FLAG 119 033205 VARIATIONAL ANALYSIS BLACK LIST FLAG 120 033205 VARIATIONAL ANALYSIS BLACK LIST FLAG 121 033205 VARIATIONAL ANALYSIS BLACK LIST FLAG 122 222000 QUALITY INFORMATION FOLLOW 123 237000 USE PREVIOUSLY DEFINED BIT MAP 124 001031 IDENTIFICATION OF ORIGINATING/GENERATING CENTRE 125 001032 GENERATING APPLICATION 126 033236 VARIATIONAL ANALYSIS DATUM EVENTS (1) 127 033236 VARIATIONAL ANALYSIS DATUM EVENTS (1) 128 033236 VARIATIONAL ANALYSIS DATUM EVENTS (1) 129 033236 VARIATIONAL ANALYSIS DATUM EVENTS (1) 130 033236 VARIATIONAL ANALYSIS DATUM EVENTS (1) 131 222000 QUALITY INFORMATION FOLLOW 132 237000 USE PREVIOUSLY DEFINED BIT MAP 133 001031 IDENTIFICATION OF ORIGINATING/GENERATING CENTRE 134 001032 GENERATING APPLICATION 135 033249 DATUM BLACK LIST EVENTS 136 033249 DATUM BLACK LIST EVENTS 137 033249 DATUM BLACK LIST EVENTS 138 033249 DATUM BLACK LIST EVENTS 139 033249 DATUM BLACK LIST EVENTS 140 222000 QUALITY INFORMATION FOLLOW 141 237000 USE PREVIOUSLY DEFINED BIT MAP 142 001031 IDENTIFICATION OF ORIGINATING/GENERATING CENTRE 143 001032 GENERATING APPLICATION 144 033238 VARIATIONAL ANALYSIS AIREP DATUM EVENTS (2) 145 033238 VARIATIONAL ANALYSIS AIREP DATUM EVENTS (2) 146 033238 VARIATIONAL ANALYSIS AIREP DATUM EVENTS (2) 147 033238 VARIATIONAL ANALYSIS AIREP DATUM EVENTS (2) 148 033238 VARIATIONAL ANALYSIS AIREP DATUM EVENTS (2) 149 222000 QUALITY INFORMATION FOLLOW 150 237000 USE PREVIOUSLY DEFINED BIT MAP ECMWF Technical Notes 57 BUFR User’s Guide 151 001031 IDENTIFICATION OF ORIGINATING/GENERATING CENTRE 152 001032 GENERATING APPLICATION 153 033234 VARIATIONAL ANALYSIS DATUM STATUS 154 033234 VARIATIONAL ANALYSIS DATUM STATUS 155 033234 VARIATIONAL ANALYSIS DATUM STATUS 156 033234 VARIATIONAL ANALYSIS DATUM STATUS 157 033234 VARIATIONAL ANALYSIS DATUM STATUS 158 222000 QUALITY INFORMATION FOLLOW 159 237000 USE PREVIOUSLY DEFINED BIT MAP 160 001031 IDENTIFICATION OF ORIGINATING/GENERATING CENTRE 161 001032 GENERATING APPLICATION 162 033250 PROBABILITY OF GROSS ERROR 163 033250 PROBABILITY OF GROSS ERROR 164 033250 PROBABILITY OF GROSS ERROR 165 033250 PROBABILITY OF GROSS ERROR 166 033250 PROBABILITY OF GROSS ERROR 167 222000 QUALITY INFORMATION FOLLOW 168 237000 USE PREVIOUSLY DEFINED BIT MAP 169 001031 IDENTIFICATION OF ORIGINATING/GENERATING CENTRE 170 001032 GENERATING APPLICATION 171 033251 RANGE OF POSSIBLE VALUES 172 033251 RANGE OF POSSIBLE VALUES 173 033251 RANGE OF POSSIBLE VALUES 174 033251 RANGE OF POSSIBLE VALUES 175 033251 RANGE OF POSSIBLE VALUES 176 224000 FIRST ORDER STATISTICS FOLLOW 177 237000 USE PREVIOUSLY DEFINED BIT MAP 178 001031 IDENTIFICATION OF ORIGINATING/GENERATING CENTRE 179 001032 GENERATING APPLICATION 180 008023 FIRST ORDER STATISTICS 181 224255 PRESSURE 182 224255 U-COMPONENT 183 224255 V-COMPONENT 184 224255 HEIGHT(HIGH ACCURACY) 185 224255 TEMPERATURE/DRY BULB TEMPERATURE 186 224000 FIRST ORDER STATISTICS FOLLOW 187 237000 USE PREVIOUSLY DEFINED BIT MAP 188 001031 IDENTIFICATION OF ORIGINATING/GENERATING CENTRE 189 001032 GENERATING APPLICATION 190 008023 FIRST ORDER STATISTICS 191 224255 PRESSURE 192 224255 U-COMPONENT 193 224255 V-COMPONENT 194 224255 HEIGHT(HIGH ACCURACY) 195 224255 TEMPERATURE/DRY BULB TEMPERATURE 196 224000 FIRST ORDER STATISTICS FOLLOW 197 237000 USE PREVIOUSLY DEFINED BIT MAP 198 001031 IDENTIFICATION OF ORIGINATING/GENERATING CENTRE 199 001032 GENERATING APPLICATION 200 008023 FIRST ORDER STATISTICS 201 224255 PRESSURE 202 224255 U-COMPONENT 203 224255 V-COMPONENT 204 224255 HEIGHT(HIGH ACCURACY) 205 224255 TEMPERATURE/DRY BULB TEMPERATURE 206 224000 FIRST ORDER STATISTICS FOLLOW 207 237000 USE PREVIOUSLY DEFINED BIT MAP 208 001031 IDENTIFICATION OF ORIGINATING/GENERATING CENTRE 209 001032 GENERATING APPLICATION 210 008023 FIRST ORDER STATISTICS 211 224255 PRESSURE 212 224255 U-COMPONENT 213 224255 V-COMPONENT 214 224255 HEIGHT(HIGH ACCURACY) 215 224255 TEMPERATURE/DRY BULB TEMPERATURE 216 224000 FIRST ORDER STATISTICS FOLLOW 217 237000 USE PREVIOUSLY DEFINED BIT MAP 218 001031 IDENTIFICATION OF ORIGINATING/GENERATING CENTRE 219 001032 GENERATING APPLICATION 220 008023 FIRST ORDER STATISTICS 221 224255 PRESSURE 222 224255 U-COMPONENT 223 224255 V-COMPONENT 224 224255 HEIGHT(HIGH ACCURACY) 225 224255 TEMPERATURE/DRY BULB TEMPERATURE 226 225000 DIFFERENCE STATISTICAL VALUES FOLLOW 227 237000 USE PREVIOUSLY DEFINED BIT MAP 228 001031 IDENTIFICATION OF ORIGINATING/GENERATING CENTRE 229 001032 GENERATING APPLICATION 230 008024 DIFFERENCE STATISTICS 231 225255 PRESSURE 232 225255 U-COMPONENT 233 225255 V-COMPONENT 234 225255 HEIGHT(HIGH ACCURACY) 235 225255 TEMPERATURE/DRY BULB TEMPERATURE 236 225000 DIFFERENCE STATISTICAL VALUES FOLLOW 237 237000 USE PREVIOUSLY DEFINED BIT MAP 238 001031 IDENTIFICATION OF ORIGINATING/GENERATING CENTRE 239 001032 GENERATING APPLICATION 240 008024 DIFFERENCE STATISTICS 241 033210 INCREMENTAL VARIATIONAL ANALYSIS UPDATE NUMBER 242 033211 MINIMISATION SIMULATION NUMBER 243 225255 PRESSURE

58 ECMWF Technical Notes4.1 Quality control example



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