labnotes.txt

iLevil
GDL90 protocol 

http://www.webgis.com/terr_world.html
RGB weighted luminance
R=0.299, G=0.587 and B=0.114

left lon = 100
right lon approx 140
delta lon 40

final int maxcol = 4800;
final int maxrow = 6000;
 
-32.0 116.0 home

The mean height of land above sea level is 840 m.

To delete a TAG
---------------
git tag --delete YOUR_TAG_NAME
git push --delete origin YOUR_TAG_NAME

 
To clean a fork from upstream
-----------------------------
git remote add upstream /url/to/original/repo
git fetch upstream
git checkout master
git reset --hard upstream/master  
git push origin master --force 

----------------------------
Rename SDR
You can name the SDRs to let Stratux know which to use for which purpose.
First log into the Raspberry Pi using your favorite ssh client. 
The user is 'pi' and the default password is 'raspberry'.

Switch to root.
    $ sudo su -

Depending on the version of Stratux some or all of the following commands may be required to shut down the Stratux processes.
    # service stratux stop
    # screen -x stratux Ctrl-C
    # screen -x dump1090 Ctrl-C
    
Ensure only the 978 MHz SDR is plugged in.
    # rtl_eeprom -d 0 -s stratux:978
    
Unplug the 978 MHz SDR and plug in the 1090 MHz SDR.
    # rtl_eeprom -d 0 -s stratux:1090
    
Plug the 978 MHz SDR back in.
    # shutdown -r now
    
Stratux has a script to automate this process of setting the SDR Serials.

SSH into Stratux and do:
Type sudo su -
Type sdr-tool.sh
READ THE SCREEN    
---------------------------
simplified steps to login as root / set root password.

HOW
Step 1 -Set root password
sudo passwd root

Step 2 - allow root login
just go to /etc/ssh/sshd_config change the line as below
PermitRootLogin yes #(i just added this to the bottom of the file)