Further clarify timestamp format in comments

application/controllers/Api.php

@@ -455,14 +455,18 @@ class API extends CI_Controller {
 	}
 
 
-	/* ENDPOINT for Rig Control */
+	/*
+	* ENDPOINT for Rig Control
+	*
+	* Note: timestamp should always be in UTC
+	*/
 
 	function radio() {
 		header('Content-type: application/json');
 
 		$this->load->model('api_model');
 
-		//$json = '{"radio":"FT-950","frequency":14075,"mode":"SSB","timestamp":"2012/04/07 16:47"}';
+		//$json = '{"radio":"FT-950","frequency":14075,"mode":"SSB","timestamp":"2012/04/07 16:47:31"}';
 
 		$this->load->model('cat');
 
@@ -477,7 +481,7 @@ class API extends CI_Controller {
 		}
 
 		if(!isset($obj['timestamp'])) {
-			$obj['timestamp'] = gmdate('Y/m/d H:i:s');
+			$obj['timestamp'] = gmdate('Y/m/d H:i:s'); // in UTC
 		}
 
 		// Store Result to Database