allow adsb as a service

bands.json

@@ -367,5 +367,14 @@
     "lower_bound": 446000000,
     "upper_bound": 446200000,
     "tags": ["public"]
+  },
+  {
+    "name": "ARNS",
+    "lower_bound": 960000000,
+    "upper_bound": 1215000000,
+    "tags": [],
+    "frequencies": {
+      "adsb": 1090000000
+    }
   }
 ]

owrx/modes.py

@@ -170,6 +170,7 @@ class Modes(object):
             underlying=["empty"],
             bandpass=Bandpass(-1e6, 1e6),
             requirements=["dump1090"],
+            service=True,
             squelch=False,
             secondaryFft=False,
         ),

owrx/service/__init__.py

@@ -309,6 +309,9 @@ class ServiceHandler(SdrSourceEventClient):
         elif mod == "packet":
             from csdr.chain.digimodes import PacketDemodulator
             return PacketDemodulator(service=True)
+        elif mod == "adsb":
+            from csdr.chain.dump1090 import Dump1090
+            return Dump1090()
 
         raise ValueError("unsupported service modulation: {}".format(mod))