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<h2>GRIB section 1, the product definition section</h2>
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KSEC1 must be initialised when encoding; it is filled in by GRIBEX when
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decoding.
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<p>An INTEGER array. </p>
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<p>When section 1 contains data for ECMWF local use, KSEC1 must
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be dimensioned
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accordingly, see <a
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href="/publications/manuals/libraries/gribex/localGRIBUsage.html">ECMWF
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local GRIB usage
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definitions</a>. <a name="Table 2"></a> </p>
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<table border="3">
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<caption><strong> Contents of KSEC1 </strong></caption><tbody>
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<tr>
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<th>Element </th>
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<th>Contents </th>
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<th style="vertical-align: middle;">GRIB API
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keys<br>
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</th>
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</tr>
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<tr>
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<td>1 </td>
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<td> Version number of code table 2 (see <a
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href="/publications/manuals/d/gribapi/mars/att=local_table/">ECMWF
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local
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code table 2</a>). </td>
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<th style="vertical-align: top;">
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<p align="left">paramId </p>
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<p align="left"><br>
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</p>
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</th>
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</tr>
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<tr>
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<td>2 </td>
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<td>Identification of centre (see <a
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href="/publications/manuals/d/gribapi/fm92/grib1/show/ctables/">WMO
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code table 0</a>), 98 for ECMWF. </td>
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<th style="vertical-align: top;"><div align="left">centre<br>
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</div></th>
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</tr>
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<tr>
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<td>3 </td>
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<td> Generating process identification number, allocated by
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the originating centre. (255 is used at ECMWF as an indicator for dummy
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surface pressure fields).
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See <a
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href="http://www.ecmwf.int/products/data/technical/model_id/index.html">ECMWF
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model identifiers</a>.</td>
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<th style="vertical-align: top;"><div align="left">generatingProcessIdentifier<br>
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</div></th>
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</tr>
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<tr>
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<td>4 </td>
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<td> Grid definition. NNN catalogue number of grid used by
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the originating centre (See Volume B of WMO publication No.9). 255 for
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a non-catalogued grid, in which case the grid description follows in
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KSEC2. </td>
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<th style="vertical-align: top;"><div align="left"><a href="/publications/manuals/d/gribapi/keys/grids/">gridType</a><br>
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</div></th>
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</tr>
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<tr>
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<td> 5 </td>
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<td> Flag showing whether sections 2 and 3 are present (see
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<a
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href="/publications/manuals/d/gribapi/fm92/grib1/show/ctables/">WMO
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code table 1</a>):<br>
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<pre> 0, Sections 2 and 3 are omitted.<br> 64, Section 2 is omitted, Section 3 is included.<br>128, Section 2 is included, Section 3 is omitted.<br>192, Sections 2 and 3 are included.</pre>
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</td>
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<th style="vertical-align: top;">
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<p align="left"><a href="/publications/manuals/d/gribapi/keys/grids/">gridType</a></p>
|
|
<p align="left">bitmapPresent<br>
|
|
</p>
|
|
</th>
|
|
</tr>
|
|
<tr>
|
|
<td> 6 </td>
|
|
<td> Parameter indicator (see <a
|
|
href="/publications/manuals/d/gribapi/fm92/grib1/show/ctables/">WMO
|
|
code table 2</a>). </td>
|
|
<th style="vertical-align: top;">
|
|
<p align="left">shortName</p>
|
|
<p align="left">paramId<br>
|
|
</p>
|
|
</th>
|
|
</tr>
|
|
<tr>
|
|
<td> 7 </td>
|
|
<td> Type of level indicator (see <a
|
|
href="/publications/manuals/d/gribapi/fm92/grib1/show/ctables/">WMO
|
|
code table 3</a>), or satellite
|
|
identifier. Satellite usage is as defined by INPE/CPTEC and used by
|
|
ECMWF pending final definition by WMO. </td>
|
|
<th style="vertical-align: top;"><div align="left">typeOfLevel<br>
|
|
</div></th>
|
|
</tr>
|
|
<tr>
|
|
<td> 8 </td>
|
|
<td> Height, pressure, etc of level (see <a
|
|
href="/publications/manuals/d/gribapi/fm92/grib1/show/ctables/">WMO
|
|
code table 3</a>). Single level or top
|
|
of layer, or satellite spectral band. Satellite usage is as defined by
|
|
INPE/CPTEC and used by ECMWF pending final definition by WMO. </td>
|
|
<th style="vertical-align: top;"><div align="left">level<br>
|
|
</div></th>
|
|
</tr>
|
|
<tr>
|
|
<td> 9 </td>
|
|
<td> Height, pressure, etc of level (see <a
|
|
href="/publications/manuals/d/gribapi/fm92/grib1/show/ctables/">WMO
|
|
code table 3</a>). Bottom of layer if
|
|
element 7 indicates a layer. </td>
|
|
<th style="vertical-align: top;">
|
|
<p align="left">typeOfLevel<br>
|
|
</p>
|
|
</th>
|
|
</tr>
|
|
<tr>
|
|
<td> 10-14 </td>
|
|
<td> Reference time of data. Date and time of start of
|
|
averaging or accumulation. </td>
|
|
<th style="vertical-align: top;"><div align="left">dataDate<br>
|
|
</div></th>
|
|
</tr>
|
|
<tr>
|
|
<td> 10 </td>
|
|
<td> Year of century (YY). </td>
|
|
<th rowspan="3" style="vertical-align: top;"><div align="left"><br>
|
|
<br>
|
|
dataDate<br>
|
|
</div></th>
|
|
</tr>
|
|
<tr>
|
|
<td> 11 </td>
|
|
<td> Month (MM). </td>
|
|
</tr>
|
|
<tr>
|
|
<td> 12 </td>
|
|
<td> Day (DD). </td>
|
|
</tr>
|
|
<tr>
|
|
<td> 13 </td>
|
|
<td> Hour (HH). </td>
|
|
<th rowspan="2" style="vertical-align: top;"><div align="left">dataTime<br>
|
|
<br>
|
|
</div></th>
|
|
</tr>
|
|
<tr>
|
|
<td> 14 </td>
|
|
<td> Minute (MM). </td>
|
|
</tr>
|
|
<tr>
|
|
<td> 15 </td>
|
|
<td> Time unit indicator (see <a
|
|
href="/publications/manuals/d/gribapi/fm92/grib1/show/ctables/">WMO
|
|
code table 4</a>). </td>
|
|
<th rowspan="6" style="vertical-align: top;"><div align="left">stepType = <span class="style1">instant |
|
|
avg |
|
|
accum |
|
|
max |
|
|
min | diff |
|
|
rms | <br>
|
|
sd |
|
|
cov |
|
|
ratio</span><br>
|
|
</div>
|
|
<div align="left">
|
|
<p>stepUnits = <span class="style1">s (seconds) | m (minutes) | h (hours) | 3h | 6h | 12h | D (day) | M (month) | Y (year) | 10Y | 30Y | C (century) </span></p>
|
|
<p>default value for stepUnits is "h" </p>
|
|
<p>startStep, endStep</p>
|
|
<p>stepRange (= "endStep" | "startStep-endStep" ) </p>
|
|
<p>step</p>
|
|
</div> </th>
|
|
</tr>
|
|
<tr>
|
|
<td> 16 </td>
|
|
<td> P1 - Time period (number of time units) 0 for analyses
|
|
or initialised analyses. </td>
|
|
</tr>
|
|
<tr>
|
|
<td> 17 </td>
|
|
<td> P2 - Time period (number of time units). Or time
|
|
interval between successive analyses, initialised analyses or forecasts
|
|
undergoing averaging or accumulation. Otherwise set to zero. </td>
|
|
</tr>
|
|
<tr>
|
|
<td> 18 </td>
|
|
<td> Time range indicator (see <a
|
|
href="/publications/manuals/d/gribapi/fm92/grib1/show/ctables/">WMO
|
|
code table 5</a>). </td>
|
|
</tr>
|
|
<tr>
|
|
<td> 19 </td>
|
|
<td> Number of products included in an average, when the
|
|
time range indicates an average or accumulation. Otherwise set to zero.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td> 20 </td>
|
|
<td> Number of products missing from an average, when the
|
|
time range indicates an average or accumulation. Otherwise set to zero.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td> 21 </td>
|
|
<td> Century of reference time of data (eg 20 for 1997). </td>
|
|
<th style="vertical-align: top;"><div align="left">date/1000-1<br>
|
|
</div></th>
|
|
</tr>
|
|
<tr>
|
|
<td> 22 </td>
|
|
<td> Sub-centre identifier. </td>
|
|
<th style="vertical-align: top;"><div align="left">subCentre<br>
|
|
</div></th>
|
|
</tr>
|
|
<tr>
|
|
<td> 23 </td>
|
|
<td> Decimal scale factor. </td>
|
|
<th style="vertical-align: top;"><div align="left">
|
|
<p>decimalScaleFactor</p>
|
|
<p>decimalPrecision<br>
|
|
</p>
|
|
</div></th>
|
|
</tr>
|
|
<tr>
|
|
<td> 24 </td>
|
|
<td> Flag field to indicate local use in Section 1:<br>
|
|
<pre>0 No local use in section 1.<br>1 Local use in section 1.</pre>
|
|
</td>
|
|
<th style="vertical-align: top;"><div align="left">setLocalDefinition<br>
|
|
</div></th>
|
|
</tr>
|
|
<tr>
|
|
<td> 25-36 </td>
|
|
<td> Reserved for WMO reserved fields. Set to 0. </td>
|
|
<th style="vertical-align: top;"><div align="left"><br>
|
|
</div></th>
|
|
</tr>
|
|
<tr>
|
|
<td> 37 </td>
|
|
<td> ECMWF local GRIB use definition identifier. This
|
|
number determines the contents of elements 38-nn. See <a
|
|
href="localGRIBUsage.html">ECMWF
|
|
local GRIB usage definitions</a>.
|
|
Local definition numbers 192 to 255 inclusive will not be used for
|
|
ECMWF local extensions. They are free for use by Member States. </td>
|
|
<th style="vertical-align: top;">
|
|
<p align="left">class</p>
|
|
<p align="left">type</p>
|
|
<p align="left">stream</p>
|
|
<p align="left">expver</p>
|
|
<p align="left">...<br>
|
|
</p>
|
|
</th>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<pre>Note:<br> For year 2000, KSEC1(21) = 20 and KSEC1(10) = 100<br> For year 2001, KSEC1(21) = 21 and KSEC1(10) = 1<br></pre>
|
|
|
|
|
|
|
|
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