File: grib_debug.dox

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/*!  \page grib_debug grib_debug
\section DESCRIPTION 
 Dump the content of a grib file in debug mode.

\section USAGE 
 grib_debug 
 [options] grib_file grib_file ...

\section OPTIONS 
-V  \n Version.
 \n \n 
\section grib_debug_examples grib_debug examples

Dumping in a WMO documentation style with hexadecimal octet values (-H)\n
and with the aliases of each key listed in square brackets (-a).\n\n
grib_dump -Ha ../data/reduced_gaussian_model_level.grib1\n
\verbatim
***** FILE: ../data/reduced_gaussian_model_level.grib1 
======================   MESSAGE 1 ( length=10142 )            ======================
======================   SECTION_0 ( length=0, padding=0 )     ======================
1-4       identifier = GRIB
5-7       totalLength = 10142 ( 0x00 0x27 0x9E )
8         editionNumber = 1 ( 0x01 ) [ls.edition]
======================   SECTION_1 ( length=52, padding=0 )    ======================
1-3       section1Length = 52 ( 0x00 0x00 0x34 )
4         gribTablesVersionNo = 128 ( 0x80 ) [table2Version]
5         identificationOfOriginatingGeneratingCentre = 98 ( 0x62 ) [European Center for Medium-Range Weather Forecasts (grib1/0.table) ] [ls.centre, identificationOfCentre, originatingCentre]
6         generatingProcessIdentifier = 128 ( 0x80 ) [generatingProcessIdentificationNumber, process]
7         gridDefinition = 255 ( 0xFF )
8         section1Flags = 128 [10000000]
9         indicatorOfParameter = 130 ( 0x82 ) [T Temperature K (grib1/2.98.128.table) ]
10        indicatorOfTypeOfLevel = 109 ( 0x6D ) [Hybrid level level number (2 octets) (grib1/3.table) ] [ls.levelType, typeOfLevel, typeOfFirstFixedSurface, mars.levtype]
11-12     lev = 1 ( 0x00 0x01 ) [topLevel, bottomLevel, ls.level, mars.levelist]
13        yearOfCentury = 7 ( 0x07 )
14        month = 3 ( 0x03 )
15        day = 18 ( 0x12 )
16        hour = 12 ( 0x0C )
17        minute = 0 ( 0x00 )
18        indicatorOfUnitOfTimeRange = 1 ( 0x01 ) [Hour (grib1/4.table) ]
19        periodOfTime = 0 ( 0x00 ) [P1]
20        periodOfTimeIntervals = 0 ( 0x00 ) [P2]
21        timeRangeIndicator = 0 ( 0x00 ) [Forecast product valid at reference time + P1 (P1>0) (grib1/5.table) ]
22-23     numberIncludedInAverage = 0 ( 0x00 0x00 )
24        numberMissingFromAveragesOrAccumulations = 0 ( 0x00 )
25        centuryOfReferenceTimeOfData = 21 ( 0x15 )
26        identificationOfOriginatingGeneratingSubCentre = 0 ( 0x00 ) [Absent (grib1/0.table) ] [subCentre]
27-28     decimalScaleFactor = 2 ( 0x00 0x02 )
29-40     reservedNeedNotBePresent = 12 {
               00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00
            } # pad reservedNeedNotBePresent 
41        localDefinitionNumber = 1 ( 0x01 )
42        marsClass = 1 ( 0x01 ) [Operational archive (mars/class.table) ] [mars.class]
43        marsType = 2 ( 0x02 ) [Analysis (mars/type.table) ] [ls.dataType, mars.type]
44-45     marsStream = 1025 ( 0x04 0x01 ) [Atmospheric model (mars/stream.table) ] [mars.stream]
46-49     experimentVersionNumber = 0001 [mars.expver]
50        perturbationNumber = 0 ( 0x00 )
51        numberOfForecastsInEnsemble = 0 ( 0x00 )
52        padding_local1_1 = 1 {
                     00
                  } # pad padding_local1_1 
======================   SECTION_2 ( length=896, padding=0 )   ======================
1-3       section2Length = 896 ( 0x00 0x03 0x80 )
4         numberOfVerticalCoordinateValues = 184 ( 0xB8 ) [NV, numberOfCoordinatesValues]
5         pvlLocation = 33 ( 0x21 )
6         dataRepresentationType = 4 ( 0x04 ) [Gaussian Latitude/Longitude Grid (grib1/6.table) ]
7-8       numberOfPointsAlongAParallel = MISSING ( 0xFF 0xFF ) [geography.Ni]
9-10      numberOfPointsAlongAMeridian = 64 ( 0x00 0x40 ) [geography.Nj]
11-13     latitudeOfFirstGridPoint = 87864 ( 0x01 0x57 0x38 ) [La1]
14-16     longitudeOfFirstGridPoint = 0 ( 0x00 0x00 0x00 ) [Lo1]
17        resolutionAndComponentFlags = 0 [00000000]
18-20     latitudeOfLastGridPoint = -87864 ( 0x81 0x57 0x38 ) [La2]
21-23     longitudeOfLastGridPoint = 357188 ( 0x05 0x73 0x44 ) [Lo2]
24-25     iDirectionIncrement = MISSING ( 0xFF 0xFF ) [Di]
26-27     numberOfParallelsBetweenAPoleAndTheEquator = 32 ( 0x00 0x20 )
28        scanningMode = 0 [00000000]
29-32     padding_grid4_1 = 4 {
                  00, 00, 00, 00
               } # pad padding_grid4_1 
33-768    pv = (184,736) {
         0,    2.00004,    3.98083,    7.38719,    12.9083,    21.4136,    33.9529,    51.7466, 
   76.1677,    108.716,    150.986,    204.637,    271.356,    352.824,    450.686,    566.519, 
   701.813,    857.946,    1036.17,    1237.59,    1463.16,    1713.71,    1989.87,    2292.16, 
    2620.9,     2976.3,    3358.43,     3767.2,    4202.42,    4663.78,    5150.86,    5663.16, 
   6199.84,    6759.73,    7341.47,    7942.93,    8564.62,     9208.3,    9873.56,    10558.9, 
   11262.5,    11982.7,    12713.9,    13453.2,      14192,    14922.7,    15638.1,    16329.6, 
   16990.6,    17613.3,      18191,      18717,    19184.5,    19587.5,    19919.8,    20175.4, 
   20348.9,    20434.2,    20426.2,      20319,      20107,    19785.4,    19348.8,    18798.8, 
   18141.3,    17385.6,    16544.6,    15633.6,    14665.6,    13653.2,    12608.4,    11543.2, 
   10471.3,    9405.22,    8356.25,    7335.16,    6353.92,     5422.8,    4550.21,    3743.46, 
   3010.15,     2356.2,    1784.85,    1297.66,    895.194,    576.314,    336.772,    162.043, 
   54.2083,    6.57563,    0.00316,          0,          0,          0,          0,          0, 
         0,          0,          0,          0
... 84 more values
} # ibmfloat pv 
769-896   pl = (64,128) {
        20,         27,         36,         40,         45,         50,         60,         64, 
        72,         75,         80,         90,         90,         96,        100,        108, 
       108,        120,        120,        120,        128,        128,        128,        128, 
       128,        128,        128,        128,        128,        128,        128,        128, 
       128,        128,        128,        128,        128,        128,        128,        128, 
       128,        128,        128,        128,        120,        120,        120,        108, 
       108,        100,         96,         90,         90,         80,         75,         72, 
        64,         60,         50,         45,         40,         36,         27,         20
} # unsigned pl 
======================   SECTION_4 ( length=9182, padding=0 )   ======================
1-3       section4Length = 9182 ( 0x00 0x23 0xDE )
4         dataFlag = 0 [00000000]
5-6       binaryScaleFactor = 0 ( 0x00 0x00 )
7-10      referenceValue = 17402.8
11        numberOfBitsContainingEachPackedValue = 12 ( 0x0C ) [nbp, numberOfBits, bitsPerValue]
12-9182   values = (6114,9171) {
   203.778,    203.468,    202.958,    202.348,    201.758,    201.278,    200.888,    200.558, 
   200.268,    200.078,    200.068,    200.318,    200.808,    201.458,    202.138,    202.758, 
   203.248,    203.588,    203.798,    203.878,    205.968,    205.418,    204.438,    203.218, 
   202.008,    201.128,    200.708,    200.598,    200.478,    200.228,    199.908,    199.528, 
   199.108,    198.708,    198.528,    198.748,    199.458,    200.488,    201.548,    202.478, 
   203.358,    204.178,    204.808,    205.198,    205.508,    205.838,    206.068,    207.338, 
   206.488,    205.198,    203.798,    202.548,    201.528,    200.848,    200.638,    200.818, 
   201.028,    200.888,    200.308,    199.638,    199.228,    199.018,    198.738,    198.328, 
   197.868,    197.358,    196.928,    196.858,    197.348,    198.368,    199.638,    200.758, 
   201.538,    202.288,    203.338,    204.438,    205.158,    205.558,    205.938,    206.438, 
   207.008,    207.468,    207.638,    207.178,    206.658,    205.398,    203.788,    202.468, 
   201.338,    200.298,    199.938,    200.318,    200.608,    200.478,    200.008,    199.208, 
   198.278,    197.708,    197.558,    197.318
... 6014 more values
} # data_g1simple_packing values 
======================   SECTION_5 ( length=4, padding=0 )     ======================
1-4       7777 = 7777
\endverbatim\n
\n \n How to obtain all the key names available in a grib file.\n\n
grib_dump -D ../data/regular_latlon_surface.grib1
\verbatim 
***** FILE: ../data/regular_latlon_surface.grib1 
======================   MESSAGE 1 ( length=1100 )             ======================
0-0 constant oneConstant = 1
0-0 constant oneMillionConstant = 1000000
0-0 offset_file offset = 0
0-0 count_file count = 1
0-0 count_total countTotal = 1
0-0 lookup kindOfProduct = 1196575042 [GRIB 1196575042 0-4]
0-0 lookup GRIBEditionNumber = 1 [? 1 7-1]
======> section GRIB (1100,1100,0)
   0-0 constant grib1divider = 1000
   0-0 constant ieeeFloats = 0
   0-0 transient dummy = 1
   ======> section section_0 (0,0,0)
      ----> label empty 
   <===== section section_0
   0-4 ascii identifier = GRIB
   4-7 g1_message_length totalLength = 1100
   7-8 unsigned editionNumber = 1 [ls.edition]
   ======> section section_1 (52,52,0)
      8-8 constant ECMWF = 98
      8-8 position offsetSection1 = 8
      8-11 section_length section1Length = 52
      11-12 unsigned gribTablesVersionNo = 128 [table2Version]
      12-13 codetable identificationOfOriginatingGeneratingCentre = 98 [European Center for Medium-Range Weather Forecasts (grib1/0.table) ] [ls.centre, identificationOfCentre, originatingCentre]
      13-14 unsigned generatingProcessIdentifier = 128 [generatingProcessIdentificationNumber, process]
      14-15 unsigned gridDefinition = 255
      15-16 codeflag section1Flags = 128 [10000000:(1=1)  Section 2 included;(2=0)  Section 3 omited:grib1/1.table]
      16-17 codetable indicatorOfParameter = 167 [2T 2 metre temperature K (grib1/2.98.128.table) ]
      17-17 sprintf marsParam = 167.128 [mars.param, ls.param]
      17-18 codetable indicatorOfTypeOfLevel = 1 [Surface (of the Earth, which includes sea surface) (grib1/3.table) ] [ls.levelType, typeOfLevel, typeOfFirstFixedSurface, mars.levtype]
      18-20 unsigned lev = 0 [topLevel, bottomLevel, ls.level, mars.levelist]
      20-21 unsigned yearOfCentury = 7
      21-22 unsigned month = 3
      22-23 unsigned day = 18
      23-24 unsigned hour = 12
      24-25 unsigned minute = 0
      25-25 constant second = 0
      25-26 codetable indicatorOfUnitOfTimeRange = 1 [Hour (grib1/4.table) ]
      26-27 unsigned periodOfTime = 0 [P1]
      27-28 unsigned periodOfTimeIntervals = 0 [P2]
      28-29 codetable timeRangeIndicator = 0 [Forecast product valid at reference time + P1 (P1>0) (grib1/5.table) ]
      29-31 unsigned numberIncludedInAverage = 0
      31-32 unsigned numberMissingFromAveragesOrAccumulations = 0
      32-33 unsigned centuryOfReferenceTimeOfData = 21
      33-34 codetable identificationOfOriginatingGeneratingSubCentre = 0 [Absent (grib1/0.table) ] [subCentre]
      34-36 signed decimalScaleFactor = 0
      36-36 transient setLocalDefinition = 0
      36-48 pad reservedNeedNotBePresent = 12 {
         00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00
      } # pad reservedNeedNotBePresent 
      48-48 g1date dataDate = 20070318 [mars.date, ls.date]
      48-48 evaluate year = 2007
      48-48 g1monthlydate monthlyDate = 20070301
      48-48 time dataTime = 1200 [mars.time]
      48-48 g1startstep marsStartStep = 0 [mars.startStep]
      48-48 g1endstep marsEndStep = 0 [mars.endStep]
      48-48 g1step marsStep = 0 [mars.step, ls.step, forecastTime]
      48-48 g1verificationdate verificationDate = 20070318
      48-48 g1monthlydate monthlyVerificationDate = 20070301
      48-48 g1day_of_the_year_date dayOfTheYearDate = 2007-078
      48-48 constant wrongPadding = 0
      48-48 constant localUsePresent = 1
      48-48 g1param parameter = 167
      48-49 unsigned localDefinitionNumber = 1
      ======> section localDefinition (11,11,0)
         ======> section mars_labeling (8,8,0)
            49-50 codetable marsClass = 1 [Operational archive (mars/class.table) ] [mars.class]
            50-51 codetable marsType = 2 [Analysis (mars/type.table) ] [ls.dataType, mars.type]
            51-53 codetable marsStream = 1025 [Atmospheric model (mars/stream.table) ] [mars.stream]
            53-57 ksec1expver experimentVersionNumber = 0001 [mars.expver]
            57-57 constant SimulationsOf30Days = s3
            57-57 constant TYPE_S3 = 22
         <===== section mars_labeling
         57-58 unsigned perturbationNumber = 0
         58-59 unsigned numberOfForecastsInEnsemble = 0
         59-60 pad padding_local1_1 = 1 {
            00
         } # pad padding_local1_1 
      <===== section localDefinition
      60-60 transient centreForTableNumber = 98
      60-60 section_padding localExtensionPadding = 0 {}
      60-60 section_padding section1Padding = 0 {}
      60-60 padtoeven evenpadding_sec1 = 0 {}
      60-60 concept grib1_short_name = 2T [ls.short_name]
      60-60 concept grib1_name = 2_metre_temperature [name]
      60-60 concept grib1_units = K [units]
   <===== section section_1
   60-60 bit gridDescriptionSectionPresent = 1 [GDSPresent]
   60-60 bit bitmapPresent = 0 [bitmapSectionPresent]
   ======> section section_2 (32,32,0)
      60-60 position offsetSection2 = 60
      60-63 section_length section2Length = 32
      63-64 unsigned numberOfVerticalCoordinateValues = 0 [NV, numberOfCoordinatesValues]
      64-64 constant neitherPresent = 255
      64-65 unsigned pvlLocation = 255
      65-66 codetable dataRepresentationType = 0 [Latitude/Longitude Grid (grib1/6.table) ]
      ======> section dataRepresentation (22,22,0)
         66-66 constant gridDefinitionTemplateNumber = 0
         66-68 unsigned numberOfPointsAlongAParallel = 16 [Ni]
         68-70 unsigned numberOfPointsAlongAMeridian = 31 [Nj]
         70-73 signed latitudeOfFirstGridPoint = 60000 [La1]
         73-73 scale latitudeOfFirstGridPointInDegrees = 60 [geography.laFirst]
         73-76 signed longitudeOfFirstGridPoint = 0 [Lo1]
         76-76 scale longitudeOfFirstGridPointInDegrees = 0 [geography.loFirst]
         76-77 codeflag resolutionAndComponentFlags = 128 [10000000:(1=1)  Direction increments given;(2=0)  Earth assumed spherical with radius = 6367.47 km;(5=0)  u and v components resolved relative to easterly and northerly directions:grib1/7.table]
         77-77 bit ijDirectionIncrementGiven = 1 [iDirectionIncrementGiven, jDirectionIncrementGiven, DiGiven, DjGiven]
         77-77 bit earthIsOblate = 0
         77-77 bit resolutionAndComponentFlags3 = 0
         77-77 bit resolutionAndComponentFlags4 = 0
         77-77 bit uvRelativeToGrid = 0
         77-77 bit resolutionAndComponentFlags6 = 0
         77-77 bit resolutionAndComponentFlags7 = 0
         77-77 bit resolutionAndComponentFlags8 = 0
         77-80 signed latitudeOfLastGridPoint = 0 [La2]
         80-80 scale latitudeOfLastGridPointInDegrees = 0 [geography.laLast]
         80-83 signed longitudeOfLastGridPoint = 30000 [Lo2]
         83-83 transient longitudeOfLastGridPointG1to2 = 30000
         83-83 scale longitudeOfLastGridPointInDegrees = 30 [geography.loLast]
         83-85 unsigned iDirectionIncrement = 2000 [Di]
         85-87 unsigned jDirectionIncrement = 2000 [Dj]
         87-88 codeflag scanningMode = 0 [00000000:(1=0)  Points scan in +i direction;(2=0)  Points scan in -j direction;(3=0)  Adjacent points in i direction are consecutive :grib1/8.table]
         88-88 bit iScansNegatively = 0
         88-88 bit jScansPositively = 0
         88-88 bit jPointsAreConsecutive = 0
         88-88 constant iScansPositively = 1
         88-88 bit scanningMode4 = 0
         88-88 bit scanningMode5 = 0
         88-88 bit scanningMode6 = 0
         88-88 bit scanningMode7 = 0
         88-88 bit scanningMode8 = 0
         88-88 latlon_increment jDirectionIncrementInDegrees = 2 [geography.jInc, geography.gridNorthSouth]
         88-88 latlon_increment iDirectionIncrementInDegrees = 2 [geography.iInc, geography.gridWestEast]
         ----> iterator ITERATOR 
      <===== section dataRepresentation
      88-88 position endGridDefinition = 88
      88-88 transient PVPresent = 0
      88-88 position offsetBeforePV = 88
      88-88 position offsetBeforePL = 88
      88-88 transient PLPresent = 0 [reducedGrid]
      88-92 padto padding_sec2_1 = 4 {
         00, 00, 00, 00
      } # padto padding_sec2_1 
      92-92 padtoeven padding_sec2_3 = 0 {}
   <===== section section_2
   92-92 position endOfHeadersMaker = 92
   92-92 transient missingValue = 9999
   92-92 constant tableReference = 0
   ======> section section_4 (1004,1004,0)
      92-92 position offsetSection4 = 92
      92-95 g1_section4_length section4Length = 1004
      95-95 g1_half_byte_codeflag halfByte = 8
      95-96 codeflag dataFlag = 8 [00001000:(1=0)  Grid-point data;(2=0)  Simple packing;(3=0)  Floating point values are represented;(4=0)  No additional flags at octet 14:grib1/11.table]
      96-98 signed binaryScaleFactor = -10
      98-102 ibmfloat referenceValue = 269.587
      102-103 unsigned numberOfBitsContainingEachPackedValue = 16 [nbp, numberOfBits, bitsPerValue]
      103-103 bit sphericalHarmonics = 0
      103-103 bit complexPacking = 0
      103-103 bit integerPointValues = 0
      103-103 bit additionalFlagPresent = 0
      ======> section dataValues (993,993,0)
         103-103 constant dataRepresentationTemplateNumber = 0
         103-103 position offsetBeforeData = 103
         103-103 constant bitMapIndicator = 255
         103-1096 data_g1simple_packing values = (496,993) {
               277.704,    277.797,    278.103,    274.598,    269.587,    278.345,    277.213,     278.19, 
               277.853,    276.747,    274.361,    273.636,    274.593,    273.782,    273.016,    274.316, 
               278.492,    278.792,    278.836,    278.333,    277.389,    278.525,    278.175,    277.255, 
               277.383,    278.047,    277.877,    276.213,     273.99,    278.333,     278.58,    277.642, 
               278.865,    278.997,    278.509,    278.983,    279.527,    279.414,      278.8,    278.749, 
               278.895,    279.056,    278.699,    278.426,    276.601,    277.491,    279.646,    279.198, 
               279.108,    279.156,    279.406,    279.527,    280.344,    280.869,    279.951,    281.621, 
               281.221,    280.676,    281.049,    280.354,    279.025,    278.192,     280.05,    280.375, 
                280.68,    281.269,    281.406,    281.483,    279.454,    280.641,    282.984,    282.578, 
               281.797,    281.542,    281.854,      281.5,    279.917,    280.529,    282.008,    281.102, 
               282.223,    282.727,    280.315,    278.539,    280.066,    280.789,    280.517,    282.883, 
               283.897,    285.161,    285.779,    285.847,    281.973,    282.869,    281.926,    280.816, 
                282.48,    281.894,    281.035,    281.722
            ... 396 more values
         } # data_g1simple_packing values 
      <===== section dataValues
      1096-1096 size valuesCount = 496
      1096-1096 concept typeOfGrid = regular_ll [ls.gridType]
      1096-1096 concept typeOfPacking = grid_simple [ls.packingType, dataRepresentation]
      1096-1096 padtoeven padding_sec4_1 = 0 {}
   <===== section section_4
   ======> section section_5 (4,4,0)
      ----> label gribSection5 
      1096-1096 position offsetSection5 = 1096
      1096-1100 ascii 7777 = 7777
   <===== section section_5
<===== section GRIB
\endverbatim\n
\n\n How to obtain a C code example from a grib file.\n\n
grib_dump -C ../data/regular_latlon_surface.grib1\n
\code 
#include <grib_api.h>

/* This code was generated automatically */


int main(int argc,const char** argv)
{
    grib_handle *h     = NULL;
    size_t size        = 0;
    double* v          = NULL;
    FILE* f            = NULL;
    const char* p      = NULL;
    const void* buffer = NULL;

    if(argc != 2) {
       fprintf(stderr,"usage: %s out\n",argv[0]);
        exit(1);
    }

    h = grib_handle_new_from_samples(NULL,"GRIB2");
    if(!h) {
        fprintf(stderr,"Cannot create grib handle\n");
        exit(1);
    }


    /* empty */

    GRIB_CHECK(grib_set_long(h,"editionNumber",1),0);
    GRIB_CHECK(grib_set_long(h,"gribTablesVersionNo",128),0);

    /* 98 = European Center for Medium-Range Weather Forecasts (grib1/0.table)  */
    GRIB_CHECK(grib_set_long(h,"identificationOfOriginatingGeneratingCentre",98),0);

    GRIB_CHECK(grib_set_long(h,"generatingProcessIdentifier",128),0);
    GRIB_CHECK(grib_set_long(h,"gridDefinition",255),0);

    /* 128 = 10000000
    (1=1)  Section 2 included
    (2=0)  Section 3 omited
    See grib1/1.table */
    GRIB_CHECK(grib_set_long(h,"section1Flags",128),0);


    /* 167 = 2T 2 metre temperature K (grib1/2.98.128.table)  */
    GRIB_CHECK(grib_set_long(h,"indicatorOfParameter",167),0);


    /* 1 = Surface (of the Earth, which includes sea surface) (grib1/3.table)  */
    GRIB_CHECK(grib_set_long(h,"indicatorOfTypeOfLevel",1),0);

    GRIB_CHECK(grib_set_long(h,"lev",0),0);
    GRIB_CHECK(grib_set_long(h,"yearOfCentury",7),0);
    GRIB_CHECK(grib_set_long(h,"month",3),0);
    GRIB_CHECK(grib_set_long(h,"day",18),0);
    GRIB_CHECK(grib_set_long(h,"hour",12),0);
    GRIB_CHECK(grib_set_long(h,"minute",0),0);

    /* 1 = Hour (grib1/4.table)  */
    GRIB_CHECK(grib_set_long(h,"indicatorOfUnitOfTimeRange",1),0);

    GRIB_CHECK(grib_set_long(h,"periodOfTime",0),0);
    GRIB_CHECK(grib_set_long(h,"periodOfTimeIntervals",0),0);

    /* 0 = Forecast product valid at reference time + P1 (P1>0) (grib1/5.table)  */
    GRIB_CHECK(grib_set_long(h,"timeRangeIndicator",0),0);

    GRIB_CHECK(grib_set_long(h,"numberIncludedInAverage",0),0);
    GRIB_CHECK(grib_set_long(h,"numberMissingFromAveragesOrAccumulations",0),0);
    GRIB_CHECK(grib_set_long(h,"centuryOfReferenceTimeOfData",21),0);

    /* 0 = Absent (grib1/0.table)  */
    GRIB_CHECK(grib_set_long(h,"identificationOfOriginatingGeneratingSubCentre",0),0);

    GRIB_CHECK(grib_set_long(h,"decimalScaleFactor",0),0);
    GRIB_CHECK(grib_set_long(h,"localDefinitionNumber",1),0);

    /* 1 = Operational archive (mars/class.table)  */
    GRIB_CHECK(grib_set_long(h,"marsClass",1),0);


    /* 2 = Analysis (mars/type.table)  */
    GRIB_CHECK(grib_set_long(h,"marsType",2),0);


    /* 1025 = Atmospheric model (mars/stream.table)  */
    GRIB_CHECK(grib_set_long(h,"marsStream",1025),0);

    p    = "0001";
    size = strlen(p)+1;
    GRIB_CHECK(grib_set_string(h,"experimentVersionNumber",p,&size),0);
    GRIB_CHECK(grib_set_long(h,"perturbationNumber",0),0);
    GRIB_CHECK(grib_set_long(h,"numberOfForecastsInEnsemble",0),0);
    GRIB_CHECK(grib_set_long(h,"numberOfVerticalCoordinateValues",0),0);
    GRIB_CHECK(grib_set_long(h,"pvlLocation",255),0);

    /* 0 = Latitude/Longitude Grid (grib1/6.table)  */
    GRIB_CHECK(grib_set_long(h,"dataRepresentationType",0),0);

    GRIB_CHECK(grib_set_long(h,"numberOfPointsAlongAParallel",16),0);
    GRIB_CHECK(grib_set_long(h,"numberOfPointsAlongAMeridian",31),0);
    GRIB_CHECK(grib_set_long(h,"latitudeOfFirstGridPoint",60000),0);
    GRIB_CHECK(grib_set_long(h,"longitudeOfFirstGridPoint",0),0);

    /* 128 = 10000000
    (1=1)  Direction increments given
    (2=0)  Earth assumed spherical with radius = 6367.47 km
    (5=0)  u and v components resolved relative to easterly and northerly directions
    See grib1/7.table */
    GRIB_CHECK(grib_set_long(h,"resolutionAndComponentFlags",128),0);

    GRIB_CHECK(grib_set_long(h,"latitudeOfLastGridPoint",0),0);
    GRIB_CHECK(grib_set_long(h,"longitudeOfLastGridPoint",30000),0);
    GRIB_CHECK(grib_set_long(h,"iDirectionIncrement",2000),0);
    GRIB_CHECK(grib_set_long(h,"jDirectionIncrement",2000),0);

    /* 0 = 00000000
    (1=0)  Points scan in +i direction
    (2=0)  Points scan in -j direction
    (3=0)  Adjacent points in i direction are consecutive 
    See grib1/8.table */
    GRIB_CHECK(grib_set_long(h,"scanningMode",0),0);


    /* ITERATOR */


    /* 8 = 00001000
    (1=0)  Grid-point data
    (2=0)  Simple packing
    (3=0)  Floating point values are represented
    (4=0)  No additional flags at octet 14
    See grib1/11.table */
    GRIB_CHECK(grib_set_long(h,"dataFlag",8),0);

    GRIB_CHECK(grib_set_long(h,"numberOfBitsContainingEachPackedValue",16),0);
    size = 496;
    v    = (double*)calloc(size,sizeof(double));
    if(!v) {
        fprintf(stderr,"failed to allocate %d bytes\n",size*sizeof(double));
        exit(1);
    }

    v[   0] = 277.704; v[   1] = 277.797; v[   2] = 278.103; v[   3] = 274.598;
    v[   4] = 269.587; v[   5] = 278.345; v[   6] = 277.213; v[   7] =  278.19;
    v[   8] = 277.853; v[   9] = 276.747; v[  10] = 274.361; v[  11] = 273.636;
    v[  12] = 274.593; v[  13] = 273.782; v[  14] = 273.016; v[  15] = 274.316;
    v[  16] = 278.492; v[  17] = 278.792; v[  18] = 278.836; v[  19] = 278.333;
    v[  20] = 277.389; v[  21] = 278.525; v[  22] = 278.175; v[  23] = 277.255;
    v[  24] = 277.383; v[  25] = 278.047; v[  26] = 277.877; v[  27] = 276.213;
    v[  28] =  273.99; v[  29] = 278.333; v[  30] =  278.58; v[  31] = 277.642;
    v[  32] = 278.865; v[  33] = 278.997; v[  34] = 278.509; v[  35] = 278.983;
    v[  36] = 279.527; v[  37] = 279.414; v[  38] =   278.8; v[  39] = 278.749;
    v[  40] = 278.895; v[  41] = 279.056; v[  42] = 278.699; v[  43] = 278.426;
    v[  44] = 276.601; v[  45] = 277.491; v[  46] = 279.646; v[  47] = 279.198;
    v[  48] = 279.108; v[  49] = 279.156; v[  50] = 279.406; v[  51] = 279.527;
    v[  52] = 280.344; v[  53] = 280.869; v[  54] = 279.951; v[  55] = 281.621;
    v[  56] = 281.221; v[  57] = 280.676; v[  58] = 281.049; v[  59] = 280.354;
    v[  60] = 279.025; v[  61] = 278.192; v[  62] =  280.05; v[  63] = 280.375;
    v[  64] =  280.68; v[  65] = 281.269; v[  66] = 281.406; v[  67] = 281.483;
    v[  68] = 279.454; v[  69] = 280.641; v[  70] = 282.984; v[  71] = 282.578;
    v[  72] = 281.797; v[  73] = 281.542; v[  74] = 281.854; v[  75] =   281.5;
    v[  76] = 279.917; v[  77] = 280.529; v[  78] = 282.008; v[  79] = 281.102;
    v[  80] = 282.223; v[  81] = 282.727; v[  82] = 280.315; v[  83] = 278.539;
    v[  84] = 280.066; v[  85] = 280.789; v[  86] = 280.517; v[  87] = 282.883;
    v[  88] = 283.897; v[  89] = 285.161; v[  90] = 285.779; v[  91] = 285.847;
    v[  92] = 281.973; v[  93] = 282.869; v[  94] = 281.926; v[  95] = 280.816;
    v[  96] =  282.48; v[  97] = 281.894; v[  98] = 281.035; v[  99] = 281.722;
    v[ 100] = 279.978; v[ 101] = 284.138; v[ 102] = 287.234; v[ 103] = 287.831;
    v[ 104] = 288.452; v[ 105] = 289.882; v[ 106] = 287.776; v[ 107] = 287.946;
    v[ 108] = 281.466; v[ 109] = 284.771; v[ 110] = 283.343; v[ 111] = 282.477;
    v[ 112] = 284.723; v[ 113] = 280.869; v[ 114] = 285.693; v[ 115] = 284.132;
    v[ 116] = 276.881; v[ 117] = 283.388; v[ 118] = 287.295; v[ 119] = 286.764;
    v[ 120] = 291.798; v[ 121] = 291.607; v[ 122] = 290.086; v[ 123] = 286.769;
    v[ 124] =  284.24; v[ 125] = 280.884; v[ 126] = 286.866; v[ 127] = 284.694;
    v[ 128] = 285.417; v[ 129] = 283.823; v[ 130] = 289.898; v[ 131] = 290.317;
    v[ 132] = 287.031; v[ 133] = 287.949; v[ 134] = 289.263; v[ 135] = 289.869;
    v[ 136] = 289.926; v[ 137] = 289.535; v[ 138] = 289.817; v[ 139] = 287.768;
    v[ 140] = 290.394; v[ 141] = 290.294; v[ 142] = 287.069; v[ 143] = 281.759;
    v[ 144] = 289.132; v[ 145] = 287.316; v[ 146] = 287.548; v[ 147] = 287.181;
    v[ 148] = 287.645; v[ 149] = 289.492; v[ 150] = 288.956; v[ 151] = 286.634;
    v[ 152] =   289.7; v[ 153] = 289.189; v[ 154] = 287.704; v[ 155] = 291.151;
    v[ 156] = 286.208; v[ 157] = 291.093; v[ 158] = 284.818; v[ 159] = 282.097;
    v[ 160] = 289.244; v[ 161] = 288.263; v[ 162] = 289.545; v[ 163] = 290.018;
    v[ 164] = 289.881; v[ 165] = 290.215; v[ 166] = 289.999; v[ 167] = 289.447;
    v[ 168] = 284.105; v[ 169] = 290.686; v[ 170] = 288.128; v[ 171] = 290.241;
    v[ 172] = 289.116; v[ 173] = 289.576; v[ 174] =   291.8; v[ 175] =  286.35;
    v[ 176] = 289.239; v[ 177] = 289.525; v[ 178] =  289.45; v[ 179] = 290.114;
    v[ 180] = 290.301; v[ 181] = 289.429; v[ 182] = 290.005; v[ 183] = 287.195;
    v[ 184] = 289.823; v[ 185] = 290.313; v[ 186] = 290.792; v[ 187] = 286.693;
    v[ 188] = 291.941; v[ 189] = 290.783; v[ 190] = 290.818; v[ 191] = 287.234;
    v[ 192] = 287.001; v[ 193] =  287.49; v[ 194] = 286.791; v[ 195] =  286.71;
    v[ 196] = 287.182; v[ 197] =  290.49; v[ 198] = 290.322; v[ 199] = 289.957;
    v[ 200] = 290.056; v[ 201] = 289.915; v[ 202] = 289.917; v[ 203] = 290.251;
    v[ 204] = 290.502; v[ 205] = 290.782; v[ 206] = 291.367; v[ 207] = 291.025;
    v[ 208] = 290.326; v[ 209] = 285.912; v[ 210] = 290.003; v[ 211] = 294.341;
    v[ 212] = 294.048; v[ 213] = 291.771; v[ 214] = 290.675; v[ 215] = 291.203;
    v[ 216] = 291.478; v[ 217] = 290.939; v[ 218] = 290.555; v[ 219] = 289.821;
    v[ 220] = 290.126; v[ 221] = 291.021; v[ 222] = 291.243; v[ 223] = 290.761;
    v[ 224] =  291.05; v[ 225] = 291.556; v[ 226] = 292.386; v[ 227] = 293.149;
    v[ 228] = 293.301; v[ 229] = 291.821; v[ 230] = 290.157; v[ 231] = 293.427;
    v[ 232] = 292.629; v[ 233] =  292.25; v[ 234] =  294.59; v[ 235] = 296.421;
    v[ 236] =  296.16; v[ 237] = 290.221; v[ 238] = 290.882; v[ 239] = 290.864;
    v[ 240] =  294.69; v[ 241] = 294.224; v[ 242] = 294.332; v[ 243] = 293.917;
    v[ 244] = 292.863; v[ 245] = 293.005; v[ 246] = 292.814; v[ 247] = 295.443;
    v[ 248] = 296.665; v[ 249] = 298.566; v[ 250] = 298.846; v[ 251] = 298.165;
    v[ 252] = 297.105; v[ 253] = 294.729; v[ 254] = 294.968; v[ 255] = 293.305;
    v[ 256] = 298.003; v[ 257] = 296.402; v[ 258] =  295.03; v[ 259] = 295.649;
    v[ 260] = 295.811; v[ 261] = 297.203; v[ 262] = 298.222; v[ 263] =  297.12;
    v[ 264] = 299.167; v[ 265] = 298.919; v[ 266] = 298.372; v[ 267] = 297.932;
    v[ 268] =  296.47; v[ 269] = 295.208; v[ 270] = 294.647; v[ 271] = 294.034;
    v[ 272] = 300.407; v[ 273] = 301.659; v[ 274] = 300.621; v[ 275] = 297.093;
    v[ 276] = 295.676; v[ 277] = 298.434; v[ 278] = 298.906; v[ 279] = 302.369;
    v[ 280] = 300.815; v[ 281] = 299.277; v[ 282] = 298.643; v[ 283] = 298.381;
    v[ 284] = 296.632; v[ 285] = 294.887; v[ 286] = 295.411; v[ 287] = 293.665;
    v[ 288] = 303.051; v[ 289] = 304.741; v[ 290] = 304.555; v[ 291] = 301.901;
    v[ 292] = 301.846; v[ 293] = 300.793; v[ 294] = 302.141; v[ 295] = 300.521;
    v[ 296] =  300.74; v[ 297] = 301.164; v[ 298] = 299.811; v[ 299] = 298.146;
    v[ 300] = 298.443; v[ 301] = 293.905; v[ 302] = 295.545; v[ 303] = 296.185;
    v[ 304] = 306.254; v[ 305] = 307.698; v[ 306] = 307.503; v[ 307] =  304.62;
    v[ 308] = 304.458; v[ 309] = 303.097; v[ 310] =  303.69; v[ 311] = 303.482;
    v[ 312] = 303.514; v[ 313] = 304.001; v[ 314] = 299.346; v[ 315] = 298.529;
    v[ 316] = 297.935; v[ 317] = 295.495; v[ 318] = 295.846; v[ 319] = 296.122;
    v[ 320] = 309.596; v[ 321] = 308.059; v[ 322] = 305.473; v[ 323] = 305.581;
    v[ 324] =  306.11; v[ 325] = 303.994; v[ 326] = 304.602; v[ 327] = 304.286;
    v[ 328] =  304.18; v[ 329] = 305.511; v[ 330] = 300.083; v[ 331] =  299.69;
    v[ 332] = 297.061; v[ 333] = 296.252; v[ 334] = 296.508; v[ 335] = 298.427;
    v[ 336] = 309.837; v[ 337] = 309.568; v[ 338] = 308.175; v[ 339] = 306.983;
    v[ 340] = 307.399; v[ 341] = 303.002; v[ 342] = 303.582; v[ 343] = 303.765;
    v[ 344] = 304.829; v[ 345] = 303.815; v[ 346] = 302.952; v[ 347] = 301.263;
    v[ 348] = 296.397; v[ 349] = 298.184; v[ 350] = 297.765; v[ 351] = 299.807;
    v[ 352] = 311.829; v[ 353] =  309.43; v[ 354] = 307.672; v[ 355] = 307.068;
    v[ 356] = 306.384; v[ 357] = 304.862; v[ 358] = 304.397; v[ 359] = 303.944;
    v[ 360] = 304.673; v[ 361] = 304.326; v[ 362] = 303.948; v[ 363] = 302.827;
    v[ 364] = 297.377; v[ 365] = 296.722; v[ 366] = 298.711; v[ 367] = 300.744;
    v[ 368] = 310.353; v[ 369] = 309.716; v[ 370] =  309.28; v[ 371] = 308.163;
    v[ 372] = 306.711; v[ 373] =  305.75; v[ 374] =  304.74; v[ 375] = 305.384;
    v[ 376] = 304.885; v[ 377] = 305.735; v[ 378] =  307.71; v[ 379] = 303.764;
    v[ 380] = 303.073; v[ 381] =  300.87; v[ 382] = 300.858; v[ 383] = 302.205;
    v[ 384] = 311.264; v[ 385] = 311.085; v[ 386] = 310.432; v[ 387] =  308.94;
    v[ 388] = 305.619; v[ 389] =     307; v[ 390] = 306.413; v[ 391] = 307.649;
    v[ 392] = 308.429; v[ 393] = 309.358; v[ 394] = 309.365; v[ 395] = 307.933;
    v[ 396] =  306.15; v[ 397] = 305.126; v[ 398] = 305.611; v[ 399] = 303.336;
    v[ 400] = 309.947; v[ 401] = 309.562; v[ 402] = 309.339; v[ 403] = 310.316;
    v[ 404] = 308.055; v[ 405] = 307.565; v[ 406] = 310.605; v[ 407] =   308.4;
    v[ 408] = 309.219; v[ 409] = 310.801; v[ 410] = 310.525; v[ 411] =  309.65;
    v[ 412] = 306.611; v[ 413] = 306.033; v[ 414] = 307.988; v[ 415] = 308.941;
    v[ 416] =   308.4; v[ 417] = 307.615; v[ 418] = 307.404; v[ 419] = 308.381;
    v[ 420] = 309.778; v[ 421] = 311.715; v[ 422] = 308.409; v[ 423] = 307.156;
    v[ 424] = 308.715; v[ 425] = 307.201; v[ 426] = 310.448; v[ 427] =  309.24;
    v[ 428] = 306.716; v[ 429] = 307.307; v[ 430] = 309.062; v[ 431] = 309.776;
    v[ 432] = 303.033; v[ 433] =  302.76; v[ 434] = 303.071; v[ 435] = 306.578;
    v[ 436] = 309.819; v[ 437] = 305.046; v[ 438] = 309.764; v[ 439] = 307.857;
    v[ 440] = 301.171; v[ 441] = 302.783; v[ 442] = 301.107; v[ 443] = 300.429;
    v[ 444] = 303.189; v[ 445] = 304.585; v[ 446] = 303.709; v[ 447] = 307.132;
    v[ 448] = 302.315; v[ 449] = 302.922; v[ 450] = 302.593; v[ 451] = 302.476;
    v[ 452] = 302.132; v[ 453] = 305.953; v[ 454] = 300.132; v[ 455] = 301.361;
    v[ 456] = 302.355; v[ 457] = 304.042; v[ 458] = 302.175; v[ 459] = 297.057;
    v[ 460] = 296.072; v[ 461] = 296.644; v[ 462] = 296.895; v[ 463] =  296.22;
    v[ 464] = 300.897; v[ 465] = 300.839; v[ 466] = 300.899; v[ 467] = 301.941;
    v[ 468] = 302.709; v[ 469] = 301.495; v[ 470] = 302.248; v[ 471] = 301.468;
    v[ 472] = 303.598; v[ 473] = 304.599; v[ 474] = 299.779; v[ 475] =   297.9;
    v[ 476] = 295.564; v[ 477] = 296.015; v[ 478] = 293.688; v[ 479] = 294.294;
    v[ 480] = 300.801; v[ 481] = 300.724; v[ 482] = 301.204; v[ 483] = 302.463;
    v[ 484] = 302.885; v[ 485] = 305.413; v[ 486] = 305.523; v[ 487] = 303.672;
    v[ 488] = 304.547; v[ 489] = 303.334; v[ 490] = 301.616; v[ 491] = 298.654;
    v[ 492] = 297.975; v[ 493] = 295.379; v[ 494] =  293.83; v[ 495] = 300.082;
   
    GRIB_CHECK(grib_set_double_array(h,"values",v,size),0);
    free(v);

    /* gribSection5 */

/* Save the message */

    f = fopen(argv[1],"w");
    if(!f) {
        perror(argv[1]);
        exit(1);
    }

    GRIB_CHECK(grib_get_message(h,&buffer,&size),0);

    if(fwrite(buffer,1,size,f) != size) {
        perror(argv[1]);
        exit(1);
    }

    if(fclose(f)) {
        perror(argv[1]);
        exit(1);
    }

    grib_handle_delete(h);
    return 0;
}
\endcode\n
*/