From 4c6d3a3eee600c44760f9f63d7c6f9c18b3ff37d Mon Sep 17 00:00:00 2001
From: Joseph Zhang <yjzhang@vims.edu>
Date: Mon, 29 Jul 2024 20:13:26 -0400
Subject: [PATCH] Update HA script for FES to handle the exception case where
 points are located very close to prime meridian

---
 docs/input-output/param.md       |  2 +-
 src/Utility/Tides/gen_harm_FES.m | 26 +++++++++++++++++++-------
 2 files changed, 20 insertions(+), 8 deletions(-)

diff --git a/docs/input-output/param.md b/docs/input-output/param.md
index ebeae0e3..a95f6aeb 100644
--- a/docs/input-output/param.md
+++ b/docs/input-output/param.md
@@ -153,7 +153,7 @@ If `iprecip_off_bnd`/=0, preciptation will be turned off near land boundary. Thi
 
 ### stemp_stc (double), stemp_dz(1:2) (double)
  Option to account for sediment-water heat exchange on bottom temperature.
-  `stemp_stc` is  heat transfer coefficient W.m-2.K-1 (so `stemp_stc=0` would turn this option off).
+  `stemp_stc` is  heat transfer coefficient $W/m^2/K$ (so `stemp_stc=0` would turn this option off).
   stemp_dz(1) is the equivalent sediment buffer depth (m) for heat into sediment, and
   stemp_dz(2) is the equivalent sediment buffer depth (m) for heat out of sediment.
 
diff --git a/src/Utility/Tides/gen_harm_FES.m b/src/Utility/Tides/gen_harm_FES.m
index b9d5e9b1..a161c85e 100644
--- a/src/Utility/Tides/gen_harm_FES.m
+++ b/src/Utility/Tides/gen_harm_FES.m
@@ -14,7 +14,7 @@
 %const={'s2','m2','n2','k2','k1','p1','o1','q1','m4'};
 
 %List of open bnd seg's that contain lon/lat of open bnd nodes
-open_ll={'fg.bp.1'}; %,'fg.bp.2','fg.bp.3'};
+open_ll={'fg.bp.1','fg.bp.2'}; %,'fg.bp.3','fg.bp.4','fg.bp.5','fg.bp.6'};
 
 for iseg=1:length(open_ll)
 %-----------------------------------------------------------
@@ -72,15 +72,27 @@
     for j=1:npt
       lon2=open(j,2); if(lon2<0); lon2=lon2+360; end;
       lat2=open(j,3);
-      I=find(lon>=lon2,1); %find 1st entry
       J=find(lat>=lat2,1);
-      if(I<=1 || J<=1) 
-        disp('Failed to find an interval'); [j lon2 lat2 I J]
-        error('Bomb out'); 
+      if(J<=1) 
+        disp('Failed to find an interval for lat'); [j lon2 lat2 J]
+        error('Bomb out(1)'); 
       end
-  
-      ratx=(lon(I)-lon2)/(lon(I)-lon(I-1));
       raty=(lat(J)-lat2)/(lat(J)-lat(J-1));
+
+      %Handle case with pt very close to prime meridian
+      if(lon2<min(lon) || lon2>max(lon))
+	disp(['Point ' num2str(j) ' very close to prime meridian']);
+	disp('Its lon:'); [lon2 min(lon) max(lon)]
+	I=length(lon);
+	ratx=0;
+      else
+        I=find(lon>=lon2,1); %find 1st entry
+        if(I<=1) 
+          disp('Failed to find an interval for lon'); [j lon2 lat2 I J]
+          error('Bomb out'); 
+        end
+        ratx=(lon(I)-lon2)/(lon(I)-lon(I-1));
+      end
       %Check junks
       amp_max=max([amp0(I-1,J-1);amp0(I,J-1);amp0(I-1,J);amp0(I,J)]);
       amp_min=min([amp0(I-1,J-1);amp0(I,J-1);amp0(I-1,J);amp0(I,J)]);