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3<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
4  <head>
5    <title>angle.pro (SAXO Documentation Assistant)</title>
6  </head>
7
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50<font size=-1><i>SAXO Documentation Assistant</i>: <a href="./../home.html">Overview</a></font></td>
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55
56
57    <h1><font size="-2">Interpolation/</font></h1>
58    <h2>angle.pro</h2>
59
60    <dl>
61    </dl>
62
63   
64 north stereographic polar projection
65
66
67 Compute angles between grid lines and direction of the North pole
68(fom angle.F,v 2.2 in OPA8.2)
69
70
71   
72
73     
74      <a name="#_angle"></a>
75
76      <h2>angle  <font size="-1" color="#006633">
77 Interpolation
78</font></h2>
79
80      <p><font face="Courier">angle<i>, <a href="#_angle_keyword_fileocemesh">fileocemesh</a>, <a href="#_angle_keyword_gcosu">gcosu</a>, <a href="#_angle_keyword_gsinu">gsinu</a>, <a href="#_angle_keyword_gcosv">gcosv</a>, <a href="#_angle_keyword_gsinv">gsinv</a>, <a href="#_angle_keyword_gcost">gcost</a>, <a href="#_angle_keyword_gsint">gsint</a>, <a href="#_angle_keyword_gcosf">gcosf</a>, <a href="#_angle_keyword_gsinf">gsinf</a></i>, <a href="#_angle_keyword_IODIRECTORY">IODIRECTORY</a>=<i>scalar string</i>, <a href="#_angle_keyword_DOUBLE">DOUBLE</a>=<i>1 or 0</i></font></p>
81
82   
83
84
85   
86
87   
88    <h3>Parameters</h3>
89   
90
91    <a name="#_angle_keyword_fileocemesh"></a>
92    <h4>fileocemesh&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
93      <font size="-1" color="#006633">in</font>
94     
95     
96      <font size="-1" color="#006633">required</font>
97     
98      <font size="-1" color="#006633">type:</font> <font size="-1" color="#006633"><i>scalar string</i></font>
99     
100     
101    </h4>
102
103   
104 a netcdf file that contains (at least) the following variables:
105        glamt, gphit: longitudes and latitudes at T-points
106        glamu, gphiu: longitudes and latitudes at U-points
107        glamv, gphiv: longitudes and latitudes at V-points
108        glamf, gphif: longitudes and latitudes at F-points
109
110   
111
112    <a name="#_angle_keyword_gcosu"></a>
113    <h4>gcosu&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
114     
115      <font size="-1" color="#006633">out</font>
116     
117     
118     
119      <font size="-1" color="#006633">type:</font> <font size="-1" color="#006633"><i>2d array</i></font>
120     
121     
122    </h4>
123
124   
125 cosinus of the angle between grid lines at U points and direction of the North pole
126
127   
128
129    <a name="#_angle_keyword_gsinu"></a>
130    <h4>gsinu&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
131     
132      <font size="-1" color="#006633">out</font>
133     
134     
135     
136      <font size="-1" color="#006633">type:</font> <font size="-1" color="#006633"><i>2d array</i></font>
137     
138     
139    </h4>
140
141   
142 sinus of the angle between grid lines at U points and direction of the North pole
143
144   
145
146    <a name="#_angle_keyword_gcosv"></a>
147    <h4>gcosv&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
148     
149      <font size="-1" color="#006633">out</font>
150     
151     
152     
153      <font size="-1" color="#006633">type:</font> <font size="-1" color="#006633"><i>2d array</i></font>
154     
155     
156    </h4>
157
158   
159 cosinus of the angle between grid lines at V points and direction of the North pole
160
161   
162
163    <a name="#_angle_keyword_gsinv"></a>
164    <h4>gsinv&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
165     
166      <font size="-1" color="#006633">out</font>
167     
168     
169     
170      <font size="-1" color="#006633">type:</font> <font size="-1" color="#006633"><i>2d array</i></font>
171     
172     
173    </h4>
174
175   
176 sinus of the angle between grid lines at V points and direction of the North pole
177
178   
179
180    <a name="#_angle_keyword_gcost"></a>
181    <h4>gcost&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
182     
183      <font size="-1" color="#006633">out</font>
184     
185     
186     
187      <font size="-1" color="#006633">type:</font> <font size="-1" color="#006633"><i>2d array</i></font>
188     
189     
190    </h4>
191
192   
193 cosinus of the angle between grid lines at T points and direction of the North pole
194
195   
196
197    <a name="#_angle_keyword_gsint"></a>
198    <h4>gsint&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
199     
200      <font size="-1" color="#006633">out</font>
201     
202     
203     
204      <font size="-1" color="#006633">type:</font> <font size="-1" color="#006633"><i>2d array</i></font>
205     
206     
207    </h4>
208
209   
210 sinus of the angle between grid lines at T points and direction of the North pole
211
212   
213
214    <a name="#_angle_keyword_gcosf"></a>
215    <h4>gcosf&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
216     
217      <font size="-1" color="#006633">out</font>
218     
219     
220     
221      <font size="-1" color="#006633">type:</font> <font size="-1" color="#006633"><i>2d array</i></font>
222     
223     
224    </h4>
225
226   
227 cosinus of the angle between grid lines at F points and direction of the North pole
228
229   
230
231    <a name="#_angle_keyword_gsinf"></a>
232    <h4>gsinf&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
233     
234      <font size="-1" color="#006633">out</font>
235     
236     
237     
238      <font size="-1" color="#006633">type:</font> <font size="-1" color="#006633"><i>2d array</i></font>
239     
240     
241    </h4>
242
243   
244 sinus of the angle between grid lines at F points and direction of the North pole
245
246   
247   
248
249   
250    <h3>Keywords</h3>
251
252   
253    <a name="#_angle_keyword_IODIRECTORY"></a>
254    <h4>IODIRECTORY&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
255     
256     
257     
258     
259     
260      <font size="-1" color="#006633">type:</font> <font size="-1" color="#006633"><i>scalar string</i></font>
261      <font size="-1" color="#006633">default:</font> <font size="-1" color="#006633"><i>''</i></font>
262     
263    </h4>
264
265   
266 the directory path where is located fileocemesh
267
268   
269    <a name="#_angle_keyword_DOUBLE"></a>
270    <h4>DOUBLE&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
271     
272     
273     
274     
275     
276      <font size="-1" color="#006633">type:</font> <font size="-1" color="#006633"><i>1 or 0</i></font>
277      <font size="-1" color="#006633">default:</font> <font size="-1" color="#006633"><i>0</i></font>
278     
279    </h4>
280
281   
282 put 1 to use double precision (default is float)
283
284   
285   
286
287   
288    </pre><h3>Version history</h3>
289   
290    <h4>Version</h4>
291 $Id: angle.pro 327 2007-12-13 16:22:35Z pinsard $
292
293    <h4>History</h4>
294       Original :  96-07 (O. Marti)
295                   98-06 (G. Madec)
296       Feb 2005: IDL adaptation S. Masson
297       May 2007: F points + call to <a href="..//Interpolation/lbcorca.html">lbcorca</a>
298
299   
300
301    <h3>Known issues</h3>
302   
303   
304   
305    <h4>Restrictions</h4>
306 to compute the lateral boundary conditions, we assume that:
307     (1) the first line is similar to the second line
308       =>    gcosu[*, 0] = gcosu[*, 1]
309       =>    gsinu[*, 0] = gsinu[*, 1]
310     (2) the grid follows OPA x and north pole periodicity rule (see <a href="..//Interpolation/lbcorca.html">lbcorca</a>)
311
312
313   
314   
315   
316   
317   
318   
319   
320
321    <font size="-3"><p>&nbsp;</p></font>
322    <hr size="1" color="#CCCCCC"/>
323     
324
325   
326
327    <p><font color="gray" size="-3">&nbsp;&nbsp;Produced by IDLdoc 2.0.</font></p>
328
329  </body>
330</html>
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