Hi all,
I install the gr-air modes. And the hardware I am using is USRP N210
without GPSDO. The command I am using is the default command of the
modes_rx module. And after I run this module, I got the following
Results:
(-47 32.32056722) No handler for message type 24 from 739803
(-48 34.25826672) No handler for message type 24 from 207ee9
(-48 35.86728697) Type 5 (short surveillance ident reply) from a49b0c
with
ident 1264 (SPI ALERT)
(-48 35.87198622) No handler for message type 24 from a35558
(-50 35.95602397) No handler for message type 24 from 8b672a
(-49 35.97354972) Type 4 (short surveillance altitude reply) from 6e0c4c
at
65200ft (AIRBORNE ALERT)
(-48 36.32546122) Type 5 (short surveillance ident reply) from 69f33f
with
ident 5514 (SPI)
(-49 37.18337247) Type 0 (short A-A surveillance) from 608e19 at
120900ft
(No TCAS) (aircraft is on the ground)
(-48 37.21837897) No handler for message type 24 from e80163
(-50 38.68267197) No handler for message type 24 from b3e6f2
(-48 39.26921197) Type 0 (short A-A surveillance) from 12ff05 at 2250ft
(speed 600-1200kt) (aircraft is on the ground)
(-49 40.52049497) Type 5 (short surveillance ident reply) from 38e9a8
with
ident 3576 (SPI)
(-48 40.56394397) Type 0 (short A-A surveillance) from cf63e4 at 8700ft
(Full TCAS resolution) (aircraft is on the ground)
(-47 40.56904497) No handler for message type 24 from 5353ab
(-48 41.08549722) No handler for message type 24 from b60846
DD(-48 52.18300072) Type 5 (short surveillance ident reply) from da22a7
with ident 3450 (SPI)
(-47 53.62936347) Type 5 (short surveillance ident reply) from 8c773
with
ident 3374 (GROUND ALERT)
D(-49 56.62670697) Type 0 (short A-A surveillance) from fa024d at
125800ft
(speed 1200-2400kt)
(-47 56.95657397) Type 5 (short surveillance ident reply) from 3b6a76
with
ident 5634 (aircraft is on the ground)
(-47 57.34665522) No handler for message type 24 from f9ac8a
D(-50 59.47285847) Type 5 (short surveillance ident reply) from 7d6227
with
ident 3510 (SPI ALERT)
(-51 59.49907272) Type 0 (short A-A surveillance) from 581dfb at 76200ft
(No TCAS) (aircraft is on the ground)
D(-48 61.03326422) No handler for message type 24 from a90fee
(-48 61.18943772) Type 21 link capability report from 18049d: ACS:
0xd0ccc,
BCS: 0xfeae, ECS: 0xa7, continues 4 ident 1810
(-49 62.11700572) Type 4 (short surveillance altitude reply) from 62253
at
17325ft (SPI ALERT)
(-47 62.44659672) No handler for message type 24 from 27adc7
D(-49 64.96764872) No handler for message type 24 from e30901
(-50 64.98554547) Type 5 (short surveillance ident reply) from a39eee
with
ident 7306 (SPI ALERT)
(-47 65.04707547) No handler for message type 24 from 0ec82e
(-49 65.10223472) Type 5 (short surveillance ident reply) from ca6477
with
ident 3034 (AIRBORNE ALERT)
(-48 66.02713647) No handler for message type 24 from b4567c
(-48 66.37042047) No handler for message type 24 from 21544d
(-49 66.49397872) No handler for message type 24 from 759628
(-49 66.62760947) No handler for message type 24 from d79b77
(-48 67.58220572) Type 5 (short surveillance ident reply) from 98fb94
with
ident 3334 (AIRBORNE ALERT)
(-49 68.06558797) No handler for message type 24 from 6d93b5
(-48 68.86033522) No handler for message type 24 from 4cc3fd
This is not what I want and I don’t think it is the correct decoding
result, is it right?
I did this experiments in indoor environment, then I think maybe the
signal
is too weak, then I move to the corridor and redo this and get similar
results. I can not get the position of the air plane.
So my question is that, is it all about the environment? Is there any
other
possible bugs or something I missed that cause the output I’ve received?
I
am very curious because the corridor is quite close to the out door
environment.
Thanks a lot.
Yaxiong
–
*Yaxiong Xie / *谢亚雄
School of Computer Engineering
Nanyang Technological University, Singapore