1 | MODULE obs_read_altbias |
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2 | !!====================================================================== |
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3 | !! *** MODULE obs_readaltbias *** |
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4 | !! Observation diagnostics: Read the bias for SLA data |
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5 | !!====================================================================== |
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6 | |
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7 | !!---------------------------------------------------------------------- |
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8 | !! obs_rea_altbias : Driver for reading altimeter bias |
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9 | !!---------------------------------------------------------------------- |
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10 | |
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11 | !! * Modules used |
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12 | USE par_kind, ONLY : & ! Precision variables |
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13 | & wp, & |
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14 | & dp, & |
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15 | & sp |
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16 | USE par_oce, ONLY : & ! Domain parameters |
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17 | & jpi, & |
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18 | & jpj, & |
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19 | & jpim1 |
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20 | USE in_out_manager, ONLY : & ! I/O manager |
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21 | & lwp, & |
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22 | & numout |
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23 | USE obs_surf_def ! Surface observation definitions |
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24 | USE dom_oce, ONLY : & ! Domain variables |
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25 | & tmask, & |
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26 | & tmask_i, & |
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27 | & e1t, & |
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28 | & e2t, & |
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29 | & gphit |
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30 | USE oce, ONLY : & ! Model variables |
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31 | & ssh |
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32 | USE obs_inter_h2d |
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33 | USE obs_utils ! Various observation tools |
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34 | USE obs_inter_sup |
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35 | |
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36 | IMPLICIT NONE |
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37 | |
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38 | !! * Routine accessibility |
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39 | PRIVATE |
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40 | |
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41 | PUBLIC obs_rea_altbias ! Read the altimeter bias |
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42 | |
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43 | !!---------------------------------------------------------------------- |
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44 | !! NEMO/OCE 4.0 , NEMO Consortium (2018) |
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45 | !! $Id$ |
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46 | !! Software governed by the CeCILL license (see ./LICENSE) |
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47 | !!---------------------------------------------------------------------- |
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48 | |
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49 | CONTAINS |
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50 | |
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51 | SUBROUTINE obs_rea_altbias( sladata, k2dint, bias_file ) |
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52 | !!--------------------------------------------------------------------- |
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53 | !! |
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54 | !! *** ROUTINE obs_rea_altbias *** |
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55 | !! |
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56 | !! ** Purpose : Read from file the bias data |
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57 | !! |
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58 | !! ** Method : |
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59 | !! |
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60 | !! ** Action : |
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61 | !! |
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62 | !! References : |
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63 | !! |
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64 | !! History : |
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65 | !! ! : 2008-02 (D. Lea) Initial version |
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66 | !!---------------------------------------------------------------------- |
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67 | !! * Modules used |
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68 | USE iom |
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69 | ! |
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70 | !! * Arguments |
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71 | TYPE(obs_surf), INTENT(INOUT) :: & |
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72 | & sladata ! SLA data |
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73 | INTEGER, INTENT(IN) :: k2dint |
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74 | CHARACTER(LEN=128) :: bias_file |
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75 | |
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76 | !! * Local declarations |
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77 | |
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78 | CHARACTER(LEN=12), PARAMETER :: cpname = 'obs_rea_altbias' |
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79 | |
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80 | INTEGER :: jobs ! Obs loop variable |
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81 | INTEGER :: jpialtbias ! Number of grid point in latitude for the bias |
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82 | INTEGER :: jpjaltbias ! Number of grid point in longitude for the bias |
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83 | INTEGER :: iico ! Grid point indicies |
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84 | INTEGER :: ijco |
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85 | INTEGER :: i_nx_id ! Index to read the NetCDF file |
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86 | INTEGER :: i_ny_id ! |
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87 | INTEGER :: i_file_id ! |
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88 | INTEGER :: i_var_id |
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89 | |
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90 | REAL(wp), DIMENSION(1) :: & |
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91 | & zext, & |
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92 | & zobsmask |
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93 | REAL(wp), DIMENSION(2,2,1) :: & |
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94 | & zweig |
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95 | REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: & |
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96 | & zmask, & |
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97 | & zbias, & |
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98 | & zglam, & |
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99 | & zgphi |
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100 | REAL(wp), DIMENSION(jpi,jpj) :: z_altbias |
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101 | REAL(wp) :: zlam |
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102 | REAL(wp) :: zphi |
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103 | INTEGER, DIMENSION(:,:,:), ALLOCATABLE :: & |
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104 | & igrdi, & |
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105 | & igrdj |
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106 | INTEGER :: numaltbias |
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107 | |
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108 | IF(lwp)WRITE(numout,*) |
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109 | IF(lwp)WRITE(numout,*) ' obs_rea_altbias : ' |
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110 | IF(lwp)WRITE(numout,*) ' ------------- ' |
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111 | IF(lwp)WRITE(numout,*) ' Read altimeter bias' |
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112 | |
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113 | ! Open the file |
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114 | |
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115 | z_altbias(:,:)=0.0_wp |
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116 | numaltbias=0 |
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117 | |
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118 | IF(lwp)WRITE(numout,*) 'Opening ',bias_file |
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119 | |
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120 | CALL iom_open( bias_file, numaltbias, ldstop=.FALSE. ) |
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121 | |
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122 | |
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123 | IF (numaltbias .GT. 0) THEN |
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124 | |
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125 | ! Get the Alt bias data |
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126 | |
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127 | CALL iom_get( numaltbias, jpdom_data, 'altbias', z_altbias(:,:), 1 ) |
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128 | |
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129 | ! Close the file |
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130 | |
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131 | CALL iom_close(numaltbias) |
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132 | |
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133 | ELSE |
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134 | |
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135 | IF(lwp)WRITE(numout,*) 'no file found' |
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136 | |
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137 | ENDIF |
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138 | |
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139 | ! Intepolate the bias already on the model grid at the observation point |
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140 | |
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141 | ALLOCATE( & |
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142 | & igrdi(2,2,sladata%nsurf), & |
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143 | & igrdj(2,2,sladata%nsurf), & |
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144 | & zglam(2,2,sladata%nsurf), & |
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145 | & zgphi(2,2,sladata%nsurf), & |
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146 | & zmask(2,2,sladata%nsurf), & |
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147 | & zbias(2,2,sladata%nsurf) & |
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148 | & ) |
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149 | |
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150 | DO jobs = 1, sladata%nsurf |
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151 | |
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152 | igrdi(1,1,jobs) = sladata%mi(jobs)-1 |
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153 | igrdj(1,1,jobs) = sladata%mj(jobs)-1 |
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154 | igrdi(1,2,jobs) = sladata%mi(jobs)-1 |
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155 | igrdj(1,2,jobs) = sladata%mj(jobs) |
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156 | igrdi(2,1,jobs) = sladata%mi(jobs) |
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157 | igrdj(2,1,jobs) = sladata%mj(jobs)-1 |
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158 | igrdi(2,2,jobs) = sladata%mi(jobs) |
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159 | igrdj(2,2,jobs) = sladata%mj(jobs) |
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160 | |
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161 | END DO |
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162 | |
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163 | CALL obs_int_comm_2d( 2, 2, sladata%nsurf, jpi, jpj, & |
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164 | & igrdi, igrdj, glamt, zglam ) |
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165 | CALL obs_int_comm_2d( 2, 2, sladata%nsurf, jpi, jpj, & |
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166 | & igrdi, igrdj, gphit, zgphi ) |
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167 | CALL obs_int_comm_2d( 2, 2, sladata%nsurf, jpi, jpj, & |
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168 | & igrdi, igrdj, tmask(:,:,1), zmask ) |
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169 | CALL obs_int_comm_2d( 2, 2, sladata%nsurf, jpi, jpj, & |
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170 | & igrdi, igrdj, z_altbias, zbias ) |
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171 | |
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172 | DO jobs = 1, sladata%nsurf |
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173 | |
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174 | zlam = sladata%rlam(jobs) |
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175 | zphi = sladata%rphi(jobs) |
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176 | iico = sladata%mi(jobs) |
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177 | ijco = sladata%mj(jobs) |
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178 | |
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179 | CALL obs_int_h2d_init( 1, 1, k2dint, zlam, zphi, & |
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180 | & zglam(:,:,jobs), zgphi(:,:,jobs), & |
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181 | & zmask(:,:,jobs), zweig, zobsmask ) |
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182 | |
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183 | CALL obs_int_h2d( 1, 1, & |
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184 | & zweig, zbias(:,:,jobs), zext ) |
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185 | |
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186 | ! adjust mdt with bias field |
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187 | sladata%rext(jobs,2) = sladata%rext(jobs,2) - zext(1) |
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188 | |
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189 | END DO |
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190 | |
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191 | DEALLOCATE( & |
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192 | & igrdi, & |
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193 | & igrdj, & |
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194 | & zglam, & |
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195 | & zgphi, & |
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196 | & zmask, & |
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197 | & zbias & |
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198 | & ) |
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199 | |
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200 | END SUBROUTINE obs_rea_altbias |
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201 | |
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202 | |
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203 | |
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204 | END MODULE obs_read_altbias |
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