diff --git a/heliosmatics.js b/heliosmatics.js
index f9d41f7..4af596f 100644
--- a/heliosmatics.js
+++ b/heliosmatics.js
@@ -247,10 +247,10 @@ function SetSSType(){
     nDet = 10;
   }
   if ( iss == true ) {
-    perpDistant = 20;
-    detGap = 5;
-    detLen = 100;
-    nDet = 5;
+    perpDistant = 28.75;
+    detGap = 0.5;
+    detLen = 125;
+    nDet = 4;
   }
   arrayLen = detLen * nDet + detGap * (nDet-1);
   
@@ -593,8 +593,8 @@ function CalThetaCM(){
     let p1 = (arrayPos[i][0] + detLen * (100. - xGate)/200.);
     let p2 = (arrayPos[i][1] - detLen * (100. - xGate)/200.);
     
-    row.insertCell().innerHTML = arrayPos[i][0] + "(" + p1  + ")";
-    row.insertCell().innerHTML = arrayPos[i][1] + "(" + p2  + ")";
+    row.insertCell().innerHTML = arrayPos[i][0].toFixed(1) + "(" + p1.toFixed(1)  + ")";
+    row.insertCell().innerHTML = arrayPos[i][1].toFixed(1) + "(" + p2.toFixed(1)  + ")";
     
     ///Search thetaCM for Z
     let a1 = SearchThetaCM(p1, angGate, k_cm, qb);
diff --git a/simpleInput.py b/simpleInput.py
index 4d667ab..699b19e 100755
--- a/simpleInput.py
+++ b/simpleInput.py
@@ -102,6 +102,12 @@ if SSType == "SOLARIS" :
   nSide="6"
   pos=['58.6', '117.9', '176.8', '235.8', '294.0', '353.2', '412.1', '471.0', '530.0']
 
+if SSType == "ISS":
+  nSide="6"
+  prepDistant="28.75"
+  detWidth="27"
+  detLength="125"
+  pos=['125.5', '251', '376.5']
 
 fn2 = "sim_detectorGeo.txt"
 f = open(fn2, "w")
diff --git a/simpleSim.html b/simpleSim.html
index 1a356fb..eee9c16 100644
--- a/simpleSim.html
+++ b/simpleSim.html
@@ -56,6 +56,8 @@
         <input type="radio" name="SSType" value="HELIOS"/>HELIOS
         <br>
         <input type="radio" name="SSType" value="SOLARIS" checked="checked"/>SOLARIS
+        <br>
+        <input type="radio" name="SSType" value="ISS"/>ISS
       </tr>
       <tr>
         <td>B-field </td>