private void startSatelliteTask() {
   JSONObject data = cacheManager.getSatelliteCache(longitude, latitude, 0.5);
   if (data != null && !satelliteCacheExpired(data)) {
     SatelliteView sv = new SatelliteView(context, satelliteView);
     sv.setData(data);
     satelliteUpdated = true;
   } else {
     if (!NetworkManager.isNetworkAvailable()) {
       Toast.makeText(this.context, R.string.toast_without_network, Toast.LENGTH_SHORT).show();
       return;
     }
     refreshDialog.show();
     TaskContext taskContext = new TaskContext();
     SatelliteTask issTask = new SatelliteTask();
     issTask.addTaskListener(new WeakReference<Task.OnTaskListener>(satTaskListener));
     taskContext.set(SatelliteTask.KEY_LAT, latitude);
     taskContext.set(SatelliteTask.KEY_LON, longitude);
     taskContext.set(SatelliteTask.KEY_START_TIME, System.currentTimeMillis());
     issTask.execute(taskContext);
   }
 }
  private void startWeatherTask() {
    JSONObject cache = cacheManager.getWeatherCache(longitude, latitude, 10.0 / 24.0);
    if (cache != null) {
      createWeatherView(cache, false);
    } else {
      if (!NetworkManager.isNetworkAvailable()) {
        Toast.makeText(this.context, R.string.toast_without_network, Toast.LENGTH_SHORT).show();
        return;
      }

      refreshDialog.show();
      TaskContext taskContext = new TaskContext();
      taskContext.set(WeatherTask.KEY_URL, ConfigUtil.getString(Keys.HTTP_REAL_SERVER));
      taskContext.set(WeatherTask.KEY_LON, longitude);
      taskContext.set(WeatherTask.KEY_LAT, latitude);
      taskContext.set(WeatherTask.KEY_START_TIME, System.currentTimeMillis());

      WeatherTask task = new WeatherTask();
      task.addTaskListener(new WeakReference<Task.OnTaskListener>(weatherTaskListener));
      task.execute(taskContext);
    }
  }
  @Override
  protected TaskResult doInBackground(TaskContext... params) {
    if (params == null || params.length <= 0) {
      return new TaskResult(TaskStatus.Failed, "TaskContext is null");
    }

    TaskContext context = params[0];
    final double longitude = (Double) context.get(KEY_LON);
    final double latitude = (Double) context.get(KEY_LAT);

    final String issurl =
        String.format(ConfigUtil.getString(Keys.PRE_HEAVENS_ABOVE_ISS), latitude, longitude);
    final String ifurl =
        String.format(ConfigUtil.getString(Keys.PRE_HEAVENS_ABOVE_IRIDIUM), latitude, longitude);

    JSONObject results = new JSONObject();
    final JSONArray issResults = new JSONArray();
    final JSONArray ifResults = new JSONArray();

    final HttpClient client = HttpUtil.getHttpClient();
    Thread issThread =
        new Thread(
            new Runnable() {
              @Override
              public void run() {
                Log.d(TAG, issurl);
                String html = HttpUtil.getHtmlByUrl(client, issurl);
                if (html == null || "".equals(html)) {
                  return;
                }

                Document document = Jsoup.parse(html);
                Elements trs = document.getElementsByClass("clickableRow");
                for (Element tr : trs) {
                  Elements tds = tr.getElementsByTag("td");
                  Map<String, Object> map = new HashMap<String, Object>();
                  map.put("mag", Double.parseDouble(tds.get(1).text()));
                  map.put("stime", tds.get(2).text());
                  map.put("salt", tds.get(3).text());
                  map.put("saz", tds.get(4).text());
                  map.put("htime", tds.get(5).text());
                  map.put("halt", tds.get(6).text());
                  map.put("haz", tds.get(7).text());
                  map.put("etime", tds.get(8).text());
                  map.put("ealt", tds.get(9).text());
                  map.put("eaz", tds.get(10).text());
                  map.put("lng", longitude);
                  map.put("lat", latitude);
                  map.put("mjd", tds.get(0).child(0).attr("href").split("&")[7].split("=")[1]);
                  issResults.put(new JSONObject(map));
                }
              }
            });

    Thread ifThread =
        new Thread(
            new Runnable() {
              @Override
              public void run() {
                Log.d(TAG, ifurl);
                String html = HttpUtil.getHtmlByUrl(client, ifurl);
                if (html == null || "".equals(html)) {
                  return;
                }
                Document document = Jsoup.parse(html);
                SimpleDateFormat format = new SimpleDateFormat("HH:mm E, dd MMMM, yyyy", Locale.US);
                format.setTimeZone(TimeZone.getTimeZone("GMT+0"));
                try {
                  Calendar cal1 = Calendar.getInstance(TimeZone.getTimeZone("GMT+0"));
                  cal1.setTime(
                      format.parse(document.getElementById("ctl00_cph1_lblSearchStart").text()));
                  Calendar cal2 = Calendar.getInstance(TimeZone.getTimeZone("GMT+0"));
                  cal2.setTime(
                      format.parse(document.getElementById("ctl00_cph1_lblSearchEnd").text()));
                  boolean overyear = cal2.get(Calendar.YEAR) > cal1.get(Calendar.YEAR);
                  Elements trs = document.getElementsByClass("clickableRow");
                  int i = 0;
                  for (Element tr : trs) {
                    Elements tds = tr.getElementsByTag("td");
                    Map<String, Object> map = new HashMap<String, Object>();
                    map.put("mag", Double.parseDouble(tds.get(1).text()));
                    map.put("alt", tds.get(2).text());
                    map.put("az", tds.get(3).text());
                    map.put("satellite", tds.get(4).text());
                    map.put("distance", tds.get(5).text());
                    map.put("centermag", Double.parseDouble(tds.get(6).text()));
                    map.put("sunalt", tds.get(7).text());
                    map.put("fid", i);
                    map.put("lng", longitude);
                    map.put("lat", latitude);
                    SimpleDateFormat df1 = new SimpleDateFormat("MMM dd, HH:mm:ss", Locale.US);
                    df1.setTimeZone(TimeZone.getTimeZone("GMT+0"));
                    Calendar cal3 = Calendar.getInstance(TimeZone.getTimeZone("GMT+0"));
                    cal3.setTime(df1.parse(tds.get(0).text()));
                    if (overyear && cal3.get(Calendar.MONTH) == Calendar.JANUARY) {
                      cal3.set(Calendar.YEAR, cal2.get(Calendar.YEAR));
                    } else {
                      cal3.set(Calendar.YEAR, cal1.get(Calendar.YEAR));
                    }
                    SimpleDateFormat df2 = new SimpleDateFormat("yyyyMMddHHmmss", Locale.US);
                    df2.setTimeZone(TimeZone.getTimeZone("GMT+0"));
                    map.put("time", df2.format(cal3.getTime()));
                    ifResults.put(new JSONObject(map));
                    i++;
                  }
                } catch (Exception e) {
                  // TODO Auto-generated catch block
                  e.printStackTrace();
                }
              }
            });
    issThread.start();
    ifThread.start();
    try {
      issThread.join();
      ifThread.join();
      results.put("iss", issResults);
      results.put("iridium", ifResults);
    } catch (Exception e) {
      return new TaskResult(TaskStatus.Failed, "response error");
    }

    TaskResult taskResult = new TaskResult(TaskStatus.Finished);
    context.set(KEY_RESULT, results.toString());
    context.set(KEY_END_TIME, System.currentTimeMillis());
    taskResult.setContext(context);
    return taskResult;
  }