truncation of new log files

groundStation/src/backend/backend.c

@@ -854,7 +854,7 @@ static void quad_recv() {
 					char log_file[256];
 					create_log_name(log_file, 256);
 					printf("New log file created: '%s'\n", log_file);
-					quadlog_file = fopen(log_file, "a");
+					quadlog_file = fopen(log_file, "w");
 					quadlog_file_open = 1;
 				}
 				if (!receiving_logs) {