diff --git a/src/index.mjs b/src/index.mjs
index 98b4d56..7757fcd 100644
--- a/src/index.mjs
+++ b/src/index.mjs
@@ -23,8 +23,8 @@ export default async function(indexName, opts = {}) {
 
   // index all the data
   const documents = records.map(rec => ({
-    transponder: rec[0],
-    callsign: rec[1],
+    transponder: `${rec[0]}`.toLowerCase(),
+    callsign: `${rec[1]}`.trim(),
     origin_country: rec[2],
     time_position: new Date(rec[3] * 1000),
     last_contact: new Date(rec[4] * 1000),