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Fix: correct longitude distance calculation for snapping radius #79

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Merged
jjokella merged 1 commit into from
May 4, 2026
Merged

Fix: correct longitude distance calculation for snapping radius #79

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21 changes: 9 additions & 12 deletions interface/framework/obs_SM_pdafomi.F90
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Original file line number Diff line number Diff line change
Expand Up @@ -424,10 +424,9 @@ SUBROUTINE init_dim_obs_SM(step, dim_obs)
if(newgridcell) then

if(is_use_dr) then
if (lon(g)>180) then
deltax = abs(lon(g)-lon_obs(i)-360)
else
deltax = abs(lon(g)-lon_obs(i))
deltax = abs(lon(g)-lon_obs(i))
if (deltax > 180.0) then
deltax = 360.0 - deltax
end if
deltay = abs(lat(g)-lat_obs(i))
end if
Expand Down Expand Up @@ -611,10 +610,9 @@ SUBROUTINE init_dim_obs_SM(step, dim_obs)
if(newgridcell) then

if(is_use_dr) then
if (lon(g)>180) then
deltax = abs(lon(g)-lon_obs(i)-360)
else
deltax = abs(lon(g)-lon_obs(i))
deltax = abs(lon(g)-lon_obs(i))
if (deltax > 180.0) then
deltax = 360.0 - deltax
end if
deltay = abs(lat(g)-lat_obs(i))
end if
Expand Down Expand Up @@ -704,10 +702,9 @@ SUBROUTINE init_dim_obs_SM(step, dim_obs)
if(newgridcell) then

if(is_use_dr) then
if (lon(g)>180) then
deltax = abs(lon(g)-lon_obs(i)-360)
else
deltax = abs(lon(g)-lon_obs(i))
deltax = abs(lon(g)-lon_obs(i))
if (deltax > 180.0) then
deltax = 360.0 - deltax
end if
deltay = abs(lat(g)-lat_obs(i))
end if
Expand Down
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