From 4104f56dd138d846b77b2e197e7a1ff0269341bf Mon Sep 17 00:00:00 2001
From: Jogi Hofmüller <jogi@mur.at>
Date: Tue, 23 Aug 2011 10:36:43 +0000
Subject: - fixed stupid bug when writing TLE file to java array   - note:  TLE
 files come in DOS format!!!

git-svn-id: https://svn.spreadspace.org/mur.sat@145 7de4ea59-55d0-425e-a1af-a3118ea81d4c
---
 tools/mmd/MmdSatellite.py | 68 +++++++++++++++++++++++++++++------------------
 1 file changed, 42 insertions(+), 26 deletions(-)

diff --git a/tools/mmd/MmdSatellite.py b/tools/mmd/MmdSatellite.py
index e3f46af..bd11d40 100644
--- a/tools/mmd/MmdSatellite.py
+++ b/tools/mmd/MmdSatellite.py
@@ -25,12 +25,12 @@ def dms2degdec (lonlat):
 
 class Satellite:
 
-  def __init__ (self, location = False):
+  def __init__ (self, observer = False):
     self.name = 'RADIOSCAF-B'
     self.nickname = 'ARISSAT-1'
     self.tle_filename = '/usr/local/mmd/tles/current'
     self.db = Db ()
-    self.initSatellite (location)
+    self._initSatellite (observer)
  
   def getCurrentSSP (self):
     ssp = self._loadCurrentSSP ()
@@ -63,6 +63,25 @@ class Satellite:
     astring = '{0}\n\t\t)\n\t);'.format (astring)
     return astring
 
+  def cronJob (self):
+    if self._updateTLEFile ():
+      self._updateTrajectory ()
+    return self._computeTrajectory ()
+
+  def getLatestSSP (self):
+    return self.db.satelliteGetLatestSSP ()
+
+  def getNextPass (self):
+    '''
+    return 6-tuple with info for next pass
+    '''
+    sat = ephem.readtle (self._tle[0], self._tle[1], self._tle[2])
+    observer = ephem.Observer ()
+    observer.date = time.strftime ('%Y/%m/%d %H:%M', time.gmtime ())
+    observer.long, observer.lat, observer.elevation = str (self.observer.longitude), str (self.observer.latitude), self.observer.altitude
+    observer.pressure = 0
+    observer.horizon = '-0:34'
+    return observer.next_pass (sat)
 
   def _loadTrajectory (self, minutes):
     return self.db.satelliteLoadTrajectory (time.strftime ('%s'), minutes)
@@ -70,18 +89,18 @@ class Satellite:
   def _loadCurrentSSP (self):
     return self.db.satelliteLoadCurrentSSP (time.strftime ('%s'))
 
-  def initSatellite (self, location = False):
+  def _initSatellite (self, observer = False):
     if not self._loadTLE ():
       return False
-    if location:
-      loc = location
+    if observer:
+      self.observer = observer
     else:
-      loc = Location ()
+      self.observer = Location ()
 
     sat = ephem.readtle (self._tle[0], self._tle[1], self._tle[2])
-    obs = ephem.Observer ()
-    obs.long, obs.lat, obs.elevation = loc.longitude, loc.latitude, loc.altitude
-    sat.compute (obs)
+    observer = ephem.Observer ()
+    observer.long, observer.lat, observer.elevation = str (self.observer.longitude), str (self.observer.latitude), self.observer.altitude
+    sat.compute (observer)
     self.longitude = dms2degdec (sat.sublong.__str__ ())
     self.latitude = dms2degdec (sat.sublat.__str__ ())
     self.altitude = round (float (sat.elevation.__str__ ()), 1)
@@ -96,7 +115,7 @@ class Satellite:
 
     sat = ephem.readtle (self._tle[0], self._tle[1], self._tle[2])
     graz = ephem.Observer ()
-    graz.long, graz.lat, graz.elevation = 15.44226, 47.06576, 376
+    graz.long, graz.lat, graz.elevation = '15.44226', '47.06576', 376
 
     latest = self.db.satelliteGetLatestSSP ()
     if latest:
@@ -127,11 +146,6 @@ class Satellite:
       return False
     return True
 
-  def cronJob (self):
-    if self._updateTLEFile ():
-      self._updateTrajectory ()
-    return self._computeTrajectory ()
-
   def _updateTLEFile (self):
     '''
     store new TLE data in file with format
@@ -152,18 +166,19 @@ class Satellite:
     return False
 
   def _createOrbtrackTLEFile (self):
-    tle_file = open (self.tel_filename).read ()
+    tle_file = open (self.tle_filename)
     orbtrack_file = open ("/var/www/hofos.at/mmd/static/tle.js", "w")
-    orbtrack_file.write ("\\\\{0}\nPLib.tleData = \n[".format (time.strftime ("%Y%m%d - %H%M%S")))
+    orbtrack_file.write ("//{0}\nPLib.tleData = \n[\n".format (time.strftime ("%Y%m%d - %H%M%S")))
     count = 0
     for line in tle_file.readlines ():
+      l = line[:-2]
       if count == 2:
-        orbtrack_file.write (line[:-1])
+        orbtrack_file.write ('  "{0}"'.format (l))
       else:
-        orbtrack_file.write (line)
+        orbtrack_file.write ('  "{0}",\n'.format (l))
       count += 1
-    orbtrack_file.write ("];")
-    tel_file.close ()
+    orbtrack_file.write ("\n];\n// EOF\n")
+    tle_file.close ()
     orbtrack_file.close ()
 
   def _compareAndLinkNewTLEFile (self, filename):
@@ -185,12 +200,9 @@ class Satellite:
   def _updateTrajectory (self):
     self.db.satelliteDeleteObsoleteSSPs (time.strftime ('%s'))
 
-  def getLatestSSP (self):
-    return self.db.satelliteGetLatestSSP ()
-
   def _getTLEFileFromNetwork (self):
     '''
-    retreive TLE update from NORAD
+    retreive TLE update from NORAD/celestrak
     '''
     networkfile = 'http://www.celestrak.com/NORAD/elements/amateur.txt'
     try:
@@ -204,7 +216,11 @@ if __name__ == "__main__":
   # print satellite.longitude, satellite.latitude
   # print satellite.getTrajectoryAsJavaArray ('test', 100)
   try:
-    assert satellite.cronJob (), 'executing cronjob failed'
+    # assert satellite.cronJob (), 'executing cronjob failed'
+    satellite._createOrbtrackTLEFile ()
+    next_pass = satellite.getNextPass ()
+    assert next_pass, 'getting next pass failed'
+    print next_pass
   except AssertionError as e:
     print 'Error: {0}'.format (e)
     sys.exit (1)
-- 
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