recorder: test using GPS fix time

apps/recorder/widget.js

@@ -176,13 +176,16 @@
   };
   let getCSVHeaders = activeRecorders => ["Time"].concat(activeRecorders.map(r=>r.fields));
 
-  let writeLog = function(period) {
+  let writeLog = function(period, fix) {
     entriesWritten++;
     WIDGETS["recorder"].draw();
     try {
-      var fields = [period===1?getTime().toFixed(1):Math.round(getTime())];
+      console.log("\nfix lat:         " + fix.lat + "\nfix time (ms):   " + fix.time + "\ncpu time (s):    " + getTime());
+      var time = (fix.time&&fix.lat)?fix.time/1000:getTime();
+      var fields = [period===1?time.toFixed(1):Math.round(time)];
       activeRecorders.forEach(recorder => fields.push.apply(fields,recorder.getValues()));
       if (storageFile) storageFile.write(fields.join(",")+"\n");
+      console.log("logged time (s): " + fields[0]);
     } catch(e) {
       // If storage.write caused an error, disable
       // GPS recording so we don't keep getting errors!
@@ -194,7 +197,8 @@
     }
   }
 
-  function writeOnGPS() {writeLog(settings.period)}
+  let writeOnGPS = function(fix) {writeLog(loadSettings().period, fix); }
+
   // Called by the GPS app to reload settings and decide what to do
   let reload = function() {
     var settings = loadSettings();