Update svInTracking lastSeen

Author: PaulZC

Firmware/RTK_Everywhere/GNSS_Mosaic.h

@@ -613,9 +613,10 @@ class GNSS_MOSAIC : GNSS
             return m.SVID == findThisSv;
         }
     };
+    // Check if SV is stale based on its lastSeen
     struct find_stale_sv
     {
-        const unsigned long expireAfter_millis = 20000; // 10000 is too short
+        const unsigned long expireAfter_millis = 2000;
         unsigned long millisNow;
         find_stale_sv(unsigned long now) : millisNow(now) {}
         bool operator () (const svTracking_t& m) const
@@ -631,7 +632,7 @@ class GNSS_MOSAIC : GNSS
         _antennaIsOpen(false), _antennaIsShorted(false),
          GNSS()
     {
-            svInTracking.clear();
+        svInTracking.clear();
     }
 
     // If we have decryption keys, configure module

Firmware/RTK_Everywhere/GNSS_Mosaic.ino

@@ -2592,10 +2592,16 @@ void GNSS_MOSAIC::storeBlock4013(SEMP_PARSE_STATE *parse)
 
             if (Tracking)
             {
-                // SV is being tracked. If it is not in svInTracking, add it
+                // SV is being tracked
                 std::vector<svTracking_t>::iterator pos = std::find_if(svInTracking.begin(), svInTracking.end(), find_sv(SVID));
-                if (pos == svInTracking.end())
+                if (pos == svInTracking.end()) // If it is not in svInTracking, add it
                     svInTracking.push_back({SVID, millis()});
+                else // Update lastSeen
+                {
+                    svTracking_t sv = *pos;
+                    sv.lastSeen = millis();
+                    *pos = sv;
+                }
             }
             else
             {