tested both directions

test_01.php

@@ -25,7 +25,12 @@ $LATE_STOP_AZ = 30; // steps
 // Rescan azimuth after noticed a satellite during area scan
 $AZ_PLAY = 1.0;         // Hysteresis caused by mechanical play (degrees)
 $AZ_RESCAN = 8;         // (degrees) around expected center
-$AZ_RESCAN_STEP = 0.25; // (degrees)
+$AZ_RESCAN_STEP = 0.5; // (degrees)
+
+$EL_PLAY = 1.0;         // Hysteresis caused by mechanical play (degrees)
+$EL_RESCAN = 8;         // (degrees) around expected center
+$EL_RESCAN_STEP = 0.5; // (degrees)
+
 $USABLE_FRACT =   0.6;  // use ony samples not less than this fraction of maximal
 $USABLE_POW =     1.0;  // transform (maxstrengh - strengh) by applying pow - 1.2 ...1.3 may have marginal improvements
 $ARGMAX_OURSIDE = 0.2;  // Allow  argmax outside of the measured range by this fraction 
@@ -98,8 +103,12 @@ if ($scan_mode){
     $Success =       $xml_state->Success;
     
     if (intval ($Success)){
-        peakAzimuth($xml_state, $AZ_PLAY,$AZ_RESCAN, $AZ_RESCAN_STEP, $USABLE_FRACT, $USABLE_POW, $ARGMAX_OURSIDE);
+        $Success = peakAzimuthOrElevation($xml_state, 0, $AZ_PLAY,$AZ_RESCAN, $AZ_RESCAN_STEP, $USABLE_FRACT, $USABLE_POW, $ARGMAX_OURSIDE);
         $xml_state = simplexml_load_file($motosat_url);
+        if (intval ($Success)){
+            $Success = peakAzimuthOrElevation($xml_state, 1, $EL_PLAY,$EL_RESCAN, $EL_RESCAN_STEP, $USABLE_FRACT, $USABLE_POW, $ARGMAX_OURSIDE);
+            $xml_state = simplexml_load_file($motosat_url);
+        }
     }
     
     $xml = new SimpleXMLElement("<?xml version='1.0'?><motosat/>");
@@ -147,61 +156,64 @@ header('Access-Control-Allow-Origin: *');
 printf($rslt);
 exit (0);
 
-function peakAzimuth($xml_state, $az_play,$az_range, $az_step, $fract, $pow = 1.0, $argmax_outside=0.2){
-    global $motosat_url,$dbg_file;
+function peakAzimuthOrElevation($xml_state, $el_not_az, $azel_play, $azel_range, $azel_step, $fract, $pow = 1.0, $argmax_outside=0.2){
+    global $motosat_url, $dbg_file;
     if ($xml_state === null){
         $xml_state = simplexml_load_file($motosat_url);
     }
     $DishAngle =  getDishAngles ($xml_state);
-    $az_start_center = $DishAngle[0];
+    $motor =     $el_not_az ? 1: 0; 
+    $direction = $el_not_az ? "ELEVATION" : "AZIMUTH";
+    
+    $azel_start_center = $DishAngle[$motor];
     //move to sart rescan azimuth minus mechanical play
-    $DishAngle[0] = $az_start_center - $az_play - $az_range/2;
+    $DishAngle[$motor] = $azel_start_center - $azel_play - $azel_range/2;
     moveElAzSk_degrees($DishAngle);
     $scan_strengths = Array();
-    for ($az = $az_start_center - $az_range/2;
-         $az < ($az_start_center + $az_range/2 + $az_step);
-         $az += $az_step){
-             $DishAngle[0] = $az;
+    for ($azel = $azel_start_center - $azel_range/2;
+         $azel < ($azel_start_center + $azel_range/2 + $azel_step);
+         $azel += $azel_step){
+             $DishAngle[$motor] = $azel;
              moveElAzSk_degrees($DishAngle); // to be on the safe side re-read xml
              $modem_strength= getModemStrength();
              $scan_strengths[] = $modem_strength;
      }
      if ($dbg_file !== null) {
-        fprintf($dbg_file, "==== Azimuth scan strengths: ====\n");
+        fprintf($dbg_file, "==== $direction scan strengths: ====\n");
         fprintf($dbg_file, print_r($scan_strengths, 1));
      }
      $rel_argmax = findMax1d($scan_strengths, $fract, $pow, $argmax_outside);
     if ($rel_argmax !== null) {
-        $az_argmax = $az_start_center - $az_range / 2 + $az_step * $rel_argmax;
+        $azel_argmax = $azel_start_center - $azel_range / 2 + $azel_step * $rel_argmax;
         if ($dbg_file !== null) {
             fprintf($dbg_file, "reltive argmax = %f\n", $rel_argmax);
-            fprintf($dbg_file, "azimuth argmax = %f (was %f)\n", $az_argmax, $az_start_center);
+            fprintf($dbg_file, "$direction argmax = %f (was %f)\n", $azel_argmax, $azel_start_center);
         }
-        $DishAngle[0] = $az_argmax - $az_play;
+        $DishAngle[$motor] = $azel_argmax - $azel_play;
         if ($dbg_file !== null) {
-            fprintf($dbg_file, "====== Moving azimuth to compensate motor play to = %f\n", $DishAngle[0]);
+            fprintf($dbg_file, "====== Moving $direction to compensate motor play to = %f\n", $DishAngle[$motor]);
         }
         
         moveElAzSk_degrees($DishAngle);
-        $DishAngle[0] = $az_argmax;
+        $DishAngle[$motor] = $azel_argmax;
         if ($dbg_file !== null) {
-            fprintf($dbg_file, "====== Moving azimuth to argmax position = %f\n", $DishAngle[0]);
+            fprintf($dbg_file, "====== Moving $direction to argmax position = %f\n", $DishAngle[$motor]);
         }
         moveElAzSk_degrees($DishAngle);
+        return 1; // success
     } else {
         // for now - move back
         if ($dbg_file !== null) {
-            fprintf($dbg_file, "****** Failed to find maximum, going to known position.\n");
+            fprintf($dbg_file, "****** Failed to find maximum for $direction, going to known position.\n");
         }
-        $DishAngle[0] = $az_start_center;
+        $DishAngle[$motor] = $azel_start_center;
         moveElAzSk_degrees($DishAngle);
+        return 0; // failed
     }
-     
-     
-     
-     return;
 }
 
+
+
 function findMax1d($data, $fract, $pow, $frac_outside = 0.2){
     global $dbg_file;
     $min= $data[0];