Glad to know it is now working for you.
I tried to run the script after following the instructions, but keep getting the following error:
sudo: unable to execute ./optimize-gain.py: No such file or directory
I checked the directory and the file is indeed in there, so I am unsure why that error is popping up.
I must be missing something simple, but after deleting and recreating the file several times I still canāt get it to run.
I am using the Piaware SD card image
# first check if file optimize-gain.py is present in the current folder
dir
#if file is not there, cd to the folder where file optimize-gai.py is located
sudo chmod +x optimize-gain.py
sudo ./optimize-gain.py
1 Like
I was able to get to the site where I have the unit set up and run both those commands. I did verify the file was present (it popped up when I ran dir) before I ran the chmod and executable command, but still had the same error.
I tried creating a blank file, making it executable and running it, and didnāt have any issues, so it must be something with the gain optimization code within the file. I thought I could be missing a package the code needed to run, but the error wouldnāt make any sense if that were the case.
Would it help to re-image the SD card? According to everything I have read, the file should run, but for whatever reason the file system canāt detect the file and keeps displaying the error.
Delete optimize-gain.py file you have already created. Now do this:
#Create a new blank file optimize-gain.py and make it executable
sudo nano optimize-gain.py
sudo chmod +x optimize-gain.py
#now test blank file by running it
sudo ./optimize-gain.py
#if no error message appears, then next step is to add code to blank file and run again.
sudo nano optimize-gain.py
#copy-paste the code in blank file
#save file (Ctrl+o) and close it (Ctrl+x)
#now run the file
sudo ./optimize-gain.py
Looks like its the code that is affecting the file, because the blank file will run without errors. As soon as I add the code Iāll get the same error as before. I tried deleting the everything after the for loop in the code, and the error was still present.
I experimented with removing certain sections of the code and the closest I could get is removing the first line. When I deleted #!/usr/bin/python2 the program will run with a different set of errors, but since these errors reference lines in the code I think the program is actually being run instead of not being read as is the case when the entire code is present
@ki6fro
I replicated your situation by formatting microSD card and writing Piaware SD card image.
Found solution: Install python.
Please see below for details
pi@piaware:~$ sudo nano optimize-gain.py
#Copy-pasted code from downloaded file "Optimize-Gain-Piaware-SD-Card-Image.docx"
#Saved file (Ctrl+o) and closed it (Ctrl+x)
#Made file "optimize-gain.py" executeable
pi@piaware:~$ sudo chmod +x optimize-gain.py
#Ran "optimize-gain.py", FAILURE
pi@piaware:~$ sudo ./optimize-gain.py
sudo: unable to execute ./optimize-gain.py: No such file or directory
#SOLUTION
pi@piaware:~$ sudo apt-get update
pi@piaware:~$ sudo apt-get install python
........
........
pi@piaware:~$ sudo ./optimize-gain.py
test 1 of 5
gain= 49.6 messages= 14817 positions= 1243 planes= 71
gain= 48.0 messages= 17085 positions= 1423 planes= 78
gain= 44.5 messages= 15815 positions= 1394 planes= 85
2 Likes
Thanks abcd567, that fixed it. That call to python at the beginning of the program should have tipped me off. Running the program now and itās working.
Thanks for the help!
In my Piaware SD Card, I have installed Web Portal / Performance graphs, which installs python also during its installation. That is the reason I did not face any problem when I tried the script.
Only when I erased the existing Piaware SD card image and wrote fresh image, and tried to run optimize-gain.py, I got exactly your problem. I then realized that it is missing python, and when installed python, it started working normally.
Can it display FAās MLAT calculations after doing this?
BOTH the dump1090-mutability AND dump1090-fa are capable to display FAās MLAT.
Changing GUI/Skin does NOT prevent, or affect in any way, the display of FAās MLAT.
1 Like
So seems just because not MLAT data available in my location 
It may be because
- You have not set your receiver location
AND/OR - Have not enabled MLAT
Please see following thread and set Receiver Location.
On configure page having āConfigure Locationā button, there is also an option to Enable/Disable MLAT. Choose the Enable option
For Beginners - How To Set Receiver Location
.
Just local MLAT aircraft very few 
I think thereās something wrong in the docx file.
Character encoding can mess up things. Iām getting the following error:
pi@raspberrypi:~ $ sudo ./optimize-gain.py
File "./optimize-gain.py", line 13
SyntaxError: Non-ASCII character '\xc2' in file ./optimize-gain.py on line 13, but no encoding declared; see http://python.org/dev/peps/pep-0263/ for details
Iām on mutability & Stretch. I was using Optimize-Gain-dump-mut-on-Raspbian-Jessie.docx
@loplo
The character encoding is ok if opened by Microsoft Word on Windows.
It is bad when opened with LibreOffice on Linux Ubuntu.
I am not sure of Mac, but vaguely remember someone reporting similar problem as yours.
Which computer/OS you use?
Iām using Windows 10, but I donāt have MS Office. Iāve opened the doc with Microsoft Word pad and tried to fix it with notepad++.
In the end Iāve found some of your code on the fr24 forums, and that worked.
At the time I made the thread āTWEAKSā, it was old format of forum which did not allow posting of scripts. As a result I had to copy scripts to Microsoft Word files (.docx) and uploaded to Dropbox, and gave links to these files.
Later, I came to know .docx format gives problem if opened by any software other than Microsoft Word. I prepared these files in plain text and wanted to change links of dropbox from .docx files to .txt files, but by that time forum formate was changed to new āDiscourseā, which did not allow editing of old posts.
Since the new forum format allows posting of code, I am posting below codes from all the .docx files here:
.
There are 4 Scripts below.
Their names describe the installation they will work with.
Select the one which applies to your installation, and copy paste that script to newly created blank file optimize-gain.py
(1) Optimize Gain Script for: Piaware SD Card-Image
#!/usr/bin/python2
import time, socket, subprocess, fileinput, os
measure_duration = 62 #duration of each pass, seconds
ntests = 5 #number of tests
gains = "20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4 37.2 38.6 40.2 42.1 43.4 43.9 44.5 48.0 49.6".split()
#gains = "20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4".split()
#gains = "36.4 38.6 40.2 42.1 44.5 48.0 49.6".split()
gains.reverse()
results = {}
for i in range(ntests):
print "test", i+1, "of", ntests
for g in gains:
if g not in results:
results[g] = [0,0,{}] #msgs, positions, aircraft
for line in fileinput.input('/boot/piaware-config.txt', inplace=1):
if line.startswith('rtlsdr-gain'):
print 'rtlsdr-gain '+g
else:
print line,
os.system("sudo systemctl restart dump1090-fa")
time.sleep(2)
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('localhost',30003))
t = time.time()
d = ''
while 1:
d += s.recv(32)
if time.time() - t > measure_duration:
break
s.close()
messages = 0
positions = 0
planes = {}
for l in d.split('\n'):
a = l.split(',')
messages += 1
if len(a) > 4:
if a[1] == '3':
positions += 1
planes[a[4]] = 1
print "gain=",g, "messages=", messages, "positions=", positions, "planes=", len(planes.keys())
results[g][0] += messages
results[g][1] += positions
for hex in planes.keys():
results[g][2][hex] = 1
print "\n===Totals==="
print "Gain, Messages, Positions, Aircraft"
for g in gains:
(messages,positions,planes) = results[g]
print g, messages, positions, len(planes.keys())
.
(2) Optimize Gain Script for: dump1090-fa on Raspbian
#!/usr/bin/python2
import time, socket, subprocess, fileinput, os
measure_duration = 62 #duration of one pass, seconds
ntests = 5 #number of tests
gains = "20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4 37.2 38.6 40.2 42.1 43.4 43.9 44.5 48.0 49.6".split()
#gains = "20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4".split()
#gains = "36.4 38.6 40.2 42.1 44.5 48.0 49.6".split()
gains.reverse()
results = {}
for i in range(ntests):
print "test", i+1, "of", ntests
for g in gains:
if g not in results:
results[g] = [0,0,{}] #msgs, positions, aircraft
for line in fileinput.input('/etc/default/dump1090-fa', inplace=1):
if line.startswith('RECEIVER_OPTIONS'):
print 'RECEIVER_OPTIONS="--device-index 0 --ppm 0 --gain ' + g + ' --net-bo-port 30005 --net-sbs-port 30003"'
else:
print line,
os.system("sudo systemctl restart dump1090-fa")
time.sleep(2)
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('localhost',30003))
t = time.time()
d = ''
while 1:
d += s.recv(32)
if time.time() - t > measure_duration:
break
s.close()
messages = 0
positions = 0
planes = {}
for l in d.split('\n'):
a = l.split(',')
messages += 1
if len(a) > 4:
if a[1] == '3':
positions += 1
planes[a[4]] = 1
print "gain=",g, "messages=", messages, "positions=", positions, "planes=", len(planes.keys())
results[g][0] += messages
results[g][1] += positions
for hex in planes.keys():
results[g][2][hex] = 1
print "\n===Totals==="
print "Gain, Messages, Positions, Aircraft"
for g in gains:
(messages,positions,planes) = results[g]
print g, messages, positions, len(planes.keys())
.
(3) Optimize Gain Script for: dump1090-mutability on Raspbian
#!/usr/bin/python2
import time, socket, subprocess, fileinput, os
measure_duration = 62 #duration of each pass, seconds
ntests = 5 #number of tests
gains = "20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4 37.2 38.6 40.2 42.1 43.4 43.9 44.5 48.0 49.6".split()
#gains = "36.4 38.6 40.2 42.1 44.5 48.0 49.6".split()
#gains = "22.9 25.4 28.0 29.7 32.8 33.8 36.4".split()
gains.reverse()
results = {}
for i in range(ntests):
print "test", i+1, "of", ntests
for g in gains:
if g not in results:
results[g] = [0,0,{}] #msgs, positions, aircraft
for line in fileinput.input('/etc/default/dump1090-mutability', inplace=1):
if line.startswith('GAIN'):
print 'GAIN='+g
else:
print line,
os.system("sudo systemctl restart dump1090-mutability")
time.sleep(2)
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('localhost',30003))
t = time.time()
d = ''
while 1:
d += s.recv(32)
if time.time() - t > measure_duration:
break
s.close()
messages = 0
positions = 0
planes = {}
for l in d.split('\n'):
a = l.split(',')
messages += 1
if len(a) > 4:
if a[1] == '3':
positions += 1
planes[a[4]] = 1
print "gain=",g, "messages=", messages, "positions=", positions, "planes=", len(planes.keys())
results[g][0] += messages
results[g][1] += positions
for hex in planes.keys():
results[g][2][hex] = 1
print "\n===Totals==="
print "Gain, Messages, Positions, Aircraft"
for g in gains:
(messages,positions,planes) = results[g]
print g, messages, positions, len(planes.keys())
.
(4) Optimize Gain Script for: dump1090 (Malcolm-Robb) on Raspbian
#!/usr/bin/python2
import time, socket, subprocess
measure_duration = 15 #seconds
ntests = 10 #Number of tests
mutability = False #set to True if you use dump1090-mutability
#gains = "20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4 37.2 38.6 40.2 42.1 43.4 43.9 44.5 48.0 49.6".split()
gains = "36.4 38.6 40.2 42.1 44.5 48.0 49.6".split()
#gains = "22.9 25.4 28.0 29.7 32.8 33.8 36.4".split()
gains.reverse()
results = {}
for i in range(ntests):
print "test", i+1, "of", ntests
for g in gains:
if g not in results:
results[g] = [0,0,{}] #msgs, positions, aircraft
if mutability:
p = subprocess.Popen(('/usr/bin/dump1090-mutability --net --gain '+g+' --oversample --fix --phase-enhance --quiet').split(),shell=False,stdout=subprocess.PIPE, stderr=subprocess.PIPE)
else:
p = subprocess.Popen(('/usr/bin/dump1090 --net --gain '+g+' --quiet').split(),shell=False,stdout=subprocess.PIPE, stderr=subprocess.PIPE)
time.sleep(2)
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('localhost',30003))
t = time.time()
d = ''
while 1:
d += s.recv(32)
if time.time() - t > measure_duration:
break
s.close()
p.terminate()
messages = 0
positions = 0
planes = {}
for l in d.split('\n'):
a = l.split(',')
messages += 1
if len(a) > 4:
if a[1] == '3':
positions += 1
planes[a[4]] = 1
print "gain=",g, "messages=", messages, "positions=", positions, "planes=", len(planes.keys())
results[g][0] += messages
results[g][1] += positions
for hex in planes.keys():
results[g][2][hex] = 1
print "\n===Totals==="
print "Gain, Messages, Positions, Aircraft"
for g in gains:
(messages,positions,planes) = results[g]
print g, messages, positions, len(planes.keys())
3 Likes
Awesome, as always!
Thank you!
Ok, just to tie up TWEAK-2: REPLACING TWO-CLOCK MAP (DUMP1090-MUTABILITY) BY SKYVIEW MAP (DUMP1090-FA),
how does one revert back to the two clock map? I can sort of think of how to do it, but if I need to, I donāt want to break anything. I am thinking, it wonāt be too hard.