Various fixes for various exceptions.

You are seeing a couple of impossible altitudes and a couple of impossible longitudes. Looks like they're coming from the same aircraft. Possibly a nonstandard squitter? They pass checksum, but they don't contain the data you think they do.

src/python/modes_print.py

@@ -29,6 +29,8 @@ class modes_output_print(modes_parse.modes_parse):
   def parse(self, message):
     [msgtype, shortdata, longdata, parity, ecc, reference] = message.split()
 
+    if reference is None: reference = 0
+
     shortdata = long(shortdata, 16)
     longdata = long(longdata, 16)
     parity = long(parity, 16)
@@ -117,6 +119,8 @@ class modes_output_print(modes_parse.modes_parse):
   def print17(self, shortdata, longdata, parity, ecc):
     icao24 = shortdata & 0xFFFFFF
     subtype = (longdata >> 51) & 0x1F;
+    
+    retstr = None
 
     if subtype == 4:
       msg = self.parseBDS08(shortdata, longdata, parity, ecc)
@@ -131,8 +135,8 @@ class modes_output_print(modes_parse.modes_parse):
 
     elif subtype >= 9 and subtype <= 18:
       [altitude, decoded_lat, decoded_lon, rnge, bearing] = self.parseBDS05(shortdata, longdata, parity, ecc)
-
-      retstr = "Type 17 subtype 05 (position report) from " + "%x" % icao24 + " at (" + "%.6f" % decoded_lat + ", " + "%.6f" % decoded_lon + ") (" + "%.2f" % rnge + " @ " + "%.0f" % bearing + ") at " + str(altitude) + "ft"
+      if decoded_lat is not None:
+        retstr = "Type 17 subtype 05 (position report) from " + "%x" % icao24 + " at (" + "%.6f" % decoded_lat + ", " + "%.6f" % decoded_lon + ") (" + "%.2f" % rnge + " @ " + "%.0f" % bearing + ") at " + str(altitude) + "ft"
 
 #   this is a trigger to capture the bizarre BDS0,5 squitters you keep seeing on the map with latitudes all over the place
 #     if icao24 == 0xa1ede9:

src/python/modes_sql.py

@@ -27,10 +27,10 @@ import sqlite3
 class modes_output_sql(modes_parse.modes_parse):
   def __init__(self):
     #create the database
-    self.db = sqlite3.connect('wat.db') #RAM-based database, no persistence
+    self.db = sqlite3.connect('adsb.db')
     #now execute a schema to create the tables you need
     c = self.db.cursor()
-    query = """CREATE TABLE "positions" (
+    query = """CREATE TABLE IF NOT EXISTS "positions" (
                 "icao" INTEGER KEY NOT NULL,
                 "seen" TEXT NOT NULL,
                 "alt"  INTEGER,
@@ -38,7 +38,7 @@ class modes_output_sql(modes_parse.modes_parse):
                 "lon"  REAL
             );"""
     c.execute(query)
-    query = """CREATE TABLE "vectors" (
+    query = """CREATE TABLE IF NOT EXISTS "vectors" (
                 "icao"     INTEGER KEY NOT NULL,
                 "seen"     TEXT NOT NULL,
                 "speed"    REAL,
@@ -46,7 +46,7 @@ class modes_output_sql(modes_parse.modes_parse):
                 "vertical" REAL
             );"""
     c.execute(query)
-    query = """CREATE TABLE "ident" (
+    query = """CREATE TABLE IF NOT EXISTS "ident" (
                 "icao"     INTEGER PRIMARY KEY NOT NULL,
                 "ident"    TEXT NOT NULL
             );"""

src/python/uhd_modes.py

@@ -84,6 +84,9 @@ class adsb_rx_block (gr.top_block):
 
     self.demod = gr.complex_to_mag()
     self.avg = gr.moving_average_ff(100, 1.0/100, 400);
+#    self.filtcoeffs = gr.firdes.band_reject(1, rate, -691e3, -646e3, 10e3, WIN_HANN)
+#    self.filter = gr.fir_filter_ccc(1, self.filtcoeffs)
+    
     self.preamble = air.modes_preamble(rate, options.threshold)
     self.framer = air.modes_framer(rate)
     self.slicer = air.modes_slicer(rate, queue)
@@ -116,8 +119,6 @@ if __name__ == '__main__':
                       help="set pulse detection threshold above noise in dB [default=%default]")
   parser.add_option("-a","--output-all", action="store_true", default=False,
                       help="output all frames")
-  parser.add_option("-b","--bandwidth", type="eng_float", default=5e6,
-          help="set DBSRX baseband bandwidth in Hz [default=%default]")
   parser.add_option("-F","--filename", type="string", default=None,
             help="read data from file instead of USRP")
   parser.add_option("-K","--kml", type="string", default=None,
@@ -138,7 +139,7 @@ if __name__ == '__main__':
     sqlport = modes_output_sql() #create a SQL parser to push stuff into SQLite
     outputs.append(sqlport.insert)
     #also we spawn a thread to run every 30 seconds (or whatever) to generate KML
-    kmlgen = modes_kml(sqlport.db, options.kml) #create a KML generating thread which reads the database
+    kmlgen = modes_kml('adsb.db', options.kml) #create a KML generating thread which reads the database
 
   if options.sbs1 is True:
     sbs1port = modes_output_sbs1()