diff --git a/css/main.css b/css/main.css
index eac4c38..5c6977c 100644
--- a/css/main.css
+++ b/css/main.css
@@ -754,6 +754,19 @@ header .search form input[type='submit'] {
     text-shadow: -1px 0 white, 0 1px white, 1px 0 white, 0 -1px white;
 }
 
+.gold {
+    filter: drop-shadow(1px 0px 0 gold) drop-shadow(0px 1px 0 gold) drop-shadow(-1px -0px 0 gold) drop-shadow(-0px -1px 0 gold);
+}
+.silver {
+    filter: drop-shadow(1px 0px 0 grey) drop-shadow(0px 1px 0 grey) drop-shadow(-1px -0px 0 grey) drop-shadow(-0px -1px 0 grey);
+}
+.bronze {
+    filter: drop-shadow(1px 0px 0 chocolate) drop-shadow(0px 1px 0 chocolate) drop-shadow(-1px -0px 0 chocolate) drop-shadow(-0px -1px 0 chocolate);
+}
+.white {
+    filter: drop-shadow(1px 0px 0 white) drop-shadow(0px 1px 0 white) drop-shadow(-1px -0px 0 white) drop-shadow(-0px -1px 0 white);
+}
+
 @media only screen and (min-width: 900px) {
 }
 
diff --git a/js/tracker.js b/js/tracker.js
index 6ca48cd..78478fd 100644
--- a/js/tracker.js
+++ b/js/tracker.js
@@ -345,6 +345,8 @@ function clean_refresh(text, force, history_step) {
     if(text == wvar.mode && !force) return false;
     stopAjax();
 
+    live_data_buffer.positions.position=[];
+
     if (clientActive) {
         clientActive = false;
         if (!document.getElementById("stTimer").classList.contains('friendly-dtime') ) {
@@ -3290,14 +3292,6 @@ function updateReceiverMarker(receiver) {
 
   // init a marker if the receiver doesn't already have one
   if(!receiver.marker) {
-    
-    if (receiver.software == "radiosonde_auto_rx") {
-        //future option to show different icon per software
-    } else if (receiver.software == "rdzTTGO") {
-        //future option to show different icon per software
-    } else {
-        //future option to show different icon per software
-    }
 
     receiverIcon = new L.icon({
         iconUrl: host_url + markers_url + "antenna-green.png",
@@ -3311,7 +3305,10 @@ function updateReceiverMarker(receiver) {
         title: receiver.name,
         zIndexOffset: Z_STATION, 
     });
-    
+
+    //receiver.infobox = new L.popup({ autoClose: false, closeOnClick: false, className: "gold" }).setContent(receiver.description);
+    //receiver.infobox = new L.popup({ autoClose: false, closeOnClick: false, className: "silver" }).setContent(receiver.description);
+    //receiver.infobox = new L.popup({ autoClose: false, closeOnClick: false, className: "bronze" }).setContent(receiver.description);
     receiver.infobox = new L.popup({ autoClose: false, closeOnClick: false }).setContent(receiver.description);
 
     receiver.marker.bindPopup(receiver.infobox);