1 | ;+ |
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2 | ; |
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3 | ; NAME: correc_angle.pro |
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4 | ; |
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5 | ; PURPOSE: Corrects angles for interpolated vectorial data. |
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6 | ; Applies a rotation of field from original geographic |
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7 | ; mesh to target curvilinear grid |
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8 | ; |
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9 | ; CATEGORY: Subroutine |
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10 | ; |
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11 | ; CALLING SEQUENCE: correc_angle, zresul_uu, zresul_uv, $ |
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12 | ; zresul_vv, zresul_vu, zresul_u, zresul_v |
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13 | ; |
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14 | ; INPUTS: |
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15 | ; zresul_uu : x-component of interpolated field at |
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16 | ; u-point |
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17 | ; zresul_uv : x-component of interpolated field at |
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18 | ; v-point |
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19 | ; zresul_vv : y-component of interpolated field at |
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20 | ; v-point |
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21 | ; zresul_vu : y-component of interpolated field at |
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22 | ; u-point |
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23 | ; |
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24 | ; KEYWORD PARAMETERS: None |
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25 | ; |
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26 | ; OUTPUTS: |
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27 | ; zresul_u : corrected x-component of interpolated |
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28 | ; field at u-point |
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29 | ; zresul_v : corrected y-component of interpolated |
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30 | ; field at v-point |
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31 | ; |
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32 | ; COMMON BLOCKS: |
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33 | ; common_interp.pro |
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34 | ; |
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35 | ; SIDE EFFECTS: |
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36 | ; |
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37 | ; RESTRICTIONS: |
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38 | ; |
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39 | ; EXAMPLE: |
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40 | ; |
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41 | ; MODIFICATION HISTORY: 11/99 A. Jouzeau |
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42 | ; |
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43 | ;- |
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44 | ;------------------------------------------------------------ |
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45 | ;------------------------------------------------------------ |
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46 | ;------------------------------------------------------------ |
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47 | PRO correc_angle, zresul_uu, zresul_uv, zresul_vv, zresul_vu, zresul_u, zresul_v |
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48 | @common_interp |
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49 | ; |
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50 | ; 1. Compute angles between grid lines and direction of the North |
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51 | ; =============================================================== |
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52 | ; |
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53 | printf, 40, '' |
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54 | printf, 40, 'calculating angles between geographic mesh and target grid' |
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55 | angle, lon_u, lat_u, lon_v, lat_v, lon_f, lat_f, gsinu, gsinv, gcosu, gcosv |
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56 | ; |
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57 | ; 2. Correct the two components of the field |
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58 | ; ========================================== |
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59 | ; |
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60 | printf, 40, '' |
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61 | printf, 40, 'rotating fields' |
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62 | ; gcosu = reform(reform(temporary(gcosu), jpioce*jpjoce)#replicate(1, nstep), jpioce, jpjoce, nstep) |
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63 | ; gcosv = reform(reform(temporary(gcosv), jpioce*jpjoce)#replicate(1, nstep), jpioce, jpjoce, nstep) |
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64 | ; gsinu = reform(reform(temporary(gsinu), jpioce*jpjoce)#replicate(1, nstep), jpioce, jpjoce, nstep) |
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65 | ; gsinv = reform(reform(temporary(gsinv), jpioce*jpjoce)#replicate(1, nstep), jpioce, jpjoce, nstep) |
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66 | zresul_u = zresul_uu*gcosu + zresul_vu*gsinu |
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67 | zresul_v = zresul_vv*gcosv - zresul_uv*gsinv |
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68 | ; |
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69 | return |
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70 | END |
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