Maybe you have something on a gain optimization script, see: https://forum.flightradar24.com/threads/11249-Gain-Optimization-Script Thanks to abcd567; I have used it successfully!
I'm only having one issue with this. The script is pretty straight forward but how do I get the script? I cannot copy and paste because I flashed PiAware on to my pi......I know I'm missing something but please bear with me. *Note, just ordered a Flight Aware Pro Stick Plus from Amazon should be here in a couple of days. This SDR dongle I have is not really meant for this but I'm still trying anyways.....
SSH into Pi and follow steps described. BTW you're probably using dump1090-fa so here is link to proper script/;https://www.dropbox.com/s/4bhv5q9rdu3p5bp/Optimize-Gain-dump-fa-on-Raspbian-Jessie.docx?dl=1
[email protected]:~ $ sudo ./optimize-gain-mut.py test 1 of 5 Traceback (most recent call last): File "./optimize-gain-mut.py", line 18, in <module> for line in fileinput.input('/etc/default/dump1090-mutability', inplace=1): File "/usr/lib/python2.7/fileinput.py", line 237, in next line = self._readline() File "/usr/lib/python2.7/fileinput.py", line 316, in _readline os.rename(self._filename, self._backupfilename) OSError: [Errno 2] No such file or directory Does this mean that the dump1090 mutability is not installed?
That's exactly what I expected, replace content of script with one I posted link to. Re-run test and be patient.
OK....that seemed to work a lot better.....it now says Test 1 0f 5 so I'm assuming it's working, I'll give it some time...
Yup.....and thanks again for being patient with me I know noobs drive people crazy but you guys are really teaching me and I appreciate the time and the patients.....
All 5 test done, all with same results: gain=49.6-20.7 messages=3 positions=0 planes=0 ===Totals=== Gain, Messages, Positions, Aircraft 49.6 15 0 0 48.0 15 0 0 44.5 15 0 0 43.9 15 0 0 43.4 15 0 0 42.1 15 0 0 40.2 15 0 0 38.6 15 0 0 37.2 15 0 0 36.4 15 0 0 33.8 15 0 0 32.8 15 0 0 29.7 15 0 0 28.0 15 0 0 25.4 15 0 0 22.9 15 0 0 20.7 15 0 0
I need to make a correction here......I took the discone out of line a couple weeks ago and put in it's place my Comet GP series 2/440/6m ground plane......so the antenna in my opinion is NOT the problem......Coax is brand new....but I'm gonna take that antenna out of line and go with the retractable antenna that came with the dongle.....and run the test again. Update.....so I left the Comet antenna hooked back up and I changed the gain back to -10 in the config file and I started getting planes again, although it was only a few.....so I will run the test with the comet still in line and report back here when done.
OK...here are the results of the second round of testing.....something definately not right only seeing 3-4 aircraft.... [email protected]:~ $ sudo ./optimize-gain-mut.py test 1 of 5 gain= 49.6 messages= 131 positions= 18 planes= 2 gain= 48.0 messages= 155 positions= 13 planes= 3 gain= 44.5 messages= 2 positions= 0 planes= 1 gain= 43.9 messages= 144 positions= 11 planes= 1 gain= 43.4 messages= 272 positions= 21 planes= 1 gain= 42.1 messages= 183 positions= 9 planes= 3 gain= 40.2 messages= 357 positions= 24 planes= 3 gain= 38.6 messages= 529 positions= 39 planes= 4 gain= 37.2 messages= 293 positions= 9 planes= 5 gain= 36.4 messages= 236 positions= 17 planes= 4 gain= 33.8 messages= 413 positions= 2 planes= 6 gain= 32.8 messages= 839 positions= 8 planes= 4 gain= 29.7 messages= 360 positions= 11 planes= 6 gain= 28.0 messages= 393 positions= 25 planes= 5 gain= 25.4 messages= 147 positions= 11 planes= 5 gain= 22.9 messages= 196 positions= 22 planes= 3 gain= 20.7 messages= 428 positions= 42 planes= 6 test 2 of 5 gain= 49.6 messages= 435 positions= 37 planes= 5 gain= 48.0 messages= 360 positions= 32 planes= 5 gain= 44.5 messages= 479 positions= 53 planes= 4 gain= 43.9 messages= 597 positions= 85 planes= 3 gain= 43.4 messages= 152 positions= 28 planes= 2 gain= 42.1 messages= 578 positions= 54 planes= 3 gain= 40.2 messages= 516 positions= 41 planes= 4 gain= 38.6 messages= 228 positions= 6 planes= 4 gain= 37.2 messages= 597 positions= 51 planes= 2 gain= 36.4 messages= 452 positions= 34 planes= 5 gain= 33.8 messages= 204 positions= 0 planes= 3 gain= 32.8 messages= 170 positions= 0 planes= 2 gain= 29.7 messages= 382 positions= 26 planes= 5 gain= 28.0 messages= 467 positions= 53 planes= 5 gain= 25.4 messages= 158 positions= 17 planes= 6 gain= 22.9 messages= 571 positions= 61 planes= 5 gain= 20.7 messages= 1190 positions= 111 planes= 4 test 3 of 5 gain= 49.6 messages= 1052 positions= 123 planes= 4 gain= 48.0 messages= 649 positions= 97 planes= 4 gain= 44.5 messages= 390 positions= 50 planes= 5 gain= 43.9 messages= 391 positions= 43 planes= 4 gain= 43.4 messages= 386 positions= 44 planes= 3 gain= 42.1 messages= 406 positions= 53 planes= 2 gain= 40.2 messages= 29 positions= 3 planes= 3 gain= 38.6 messages= 54 positions= 1 planes= 1 gain= 37.2 messages= 17 positions= 0 planes= 2 gain= 36.4 messages= 50 positions= 4 planes= 3 gain= 33.8 messages= 271 positions= 0 planes= 5 gain= 32.8 messages= 134 positions= 7 planes= 2 gain= 29.7 messages= 308 positions= 25 planes= 3 gain= 28.0 messages= 514 positions= 61 planes= 3 gain= 25.4 messages= 427 positions= 48 planes= 3 gain= 22.9 messages= 282 positions= 38 planes= 1 gain= 20.7 messages= 26 positions= 1 planes= 1 test 4 of 5 gain= 49.6 messages= 2 positions= 0 planes= 1 gain= 48.0 messages= 158 positions= 0 planes= 1 gain= 44.5 messages= 150 positions= 3 planes= 3 gain= 43.9 messages= 264 positions= 48 planes= 3 gain= 43.4 messages= 399 positions= 42 planes= 2 gain= 42.1 messages= 490 positions= 52 planes= 3 gain= 40.2 messages= 52 positions= 2 planes= 3 gain= 38.6 messages= 3 positions= 0 planes= 0 gain= 37.2 messages= 14 positions= 3 planes= 1 gain= 36.4 messages= 238 positions= 42 planes= 2 gain= 33.8 messages= 115 positions= 21 planes= 1 gain= 32.8 messages= 13 positions= 1 planes= 2 gain= 29.7 messages= 168 positions= 0 planes= 1 gain= 28.0 messages= 110 positions= 0 planes= 2 gain= 25.4 messages= 262 positions= 4 planes= 2 gain= 22.9 messages= 14 positions= 0 planes= 1 gain= 20.7 messages= 3 positions= 0 planes= 0 test 5 of 5 gain= 49.6 messages= 15 positions= 0 planes= 1 gain= 48.0 messages= 80 positions= 7 planes= 2 gain= 44.5 messages= 49 positions= 4 planes= 2 gain= 43.9 messages= 22 positions= 2 planes= 2 gain= 43.4 messages= 42 positions= 1 planes= 2 gain= 42.1 messages= 76 positions= 1 planes= 2 gain= 40.2 messages= 16 positions= 0 planes= 1 gain= 38.6 messages= 3 positions= 0 planes= 0 gain= 37.2 messages= 5 positions= 0 planes= 1 gain= 36.4 messages= 3 positions= 0 planes= 0 gain= 33.8 messages= 2 positions= 1 planes= 1 gain= 32.8 messages= 291 positions= 23 planes= 1 gain= 29.7 messages= 108 positions= 6 planes= 1 gain= 28.0 messages= 71 positions= 6 planes= 1 gain= 25.4 messages= 194 positions= 24 planes= 3 gain= 22.9 messages= 93 positions= 15 planes= 3 gain= 20.7 messages= 246 positions= 26 planes= 3 ===Totals=== Gain, Messages, Positions, Aircraft 49.6 1635 178 13 48.0 1402 149 15 44.5 1070 110 15 43.9 1418 189 13 43.4 1251 136 10 42.1 1733 169 13 40.2 970 70 14 38.6 817 46 9 37.2 926 63 11 36.4 979 97 14 33.8 1005 24 16 32.8 1447 39 11 29.7 1326 68 16 28.0 1555 145 16 25.4 1188 104 19 22.9 1156 136 13 20.7 1893 180 14
I'm surprised by the test results. Mid gains give worst results. Something is wrong with the receiver or with the antenna system. Can you build simpliest coax-spider and test it with your USB stick?
You should be getting 50-80 NM even with the least efficient SDR with no 1090 filter. I suspect there is either a db loss or something with the antenna.