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Upgrading an Existing OGN Ground Station to Rebroadcast Glider Locations on 869.5MHz. 

December 2019. 

 

                                                                             

 

2.

 

Alternatively, 

connect a computer to the specific IP address allocated locally by 

your router

 to your OGN-R unit. To locate the specific ip address allocated by your 

router to the raspberry pi (host name ognpaw) connect to the router via a wired 
Ethernet or WiFi connection. Connect to the router by typing in 192.168.0.1 into 
your browser. Note this may differ depending on your broadband provider. 

3.

 

Once connected to your router you need to locate the IP address that has been 
allocated to the Raspberry Pi (host name ognpaw) of your OGN-R. To get the actual 
IP address allocated to the Raspberry Pi you may have to use an advanced menu that 
is password protected. See your local router instructions. For example, a UK Sky 

network router generic log in is ‘

admin’

 

and the password is ‘

sky’.

 Others will differ. 

Then choose LAN IP Set Up. For example, if the IP address allocated for your unit 
with the default hostname 

ognpaw

 is 192.168.0.200 then you will connect via 

192.168.0.20

.

 The allocated address (in this case 192.168.0.20) will vary from router 

to router.  
 

Also, please note if the router is powered down it 

may 

allocate a different IP address. 

This is called dynamic IP allocation. This can be overcome by giving the OGN-R a fixed 
IP address. 

 

4.

 

Additionally, the 

OGN-R 

software has been developed so that you can run a shell 

from within a web browser. Google Chrome or Firefox is recommended. 
When connected on the same network as the Pi, navigate to 

http://ognpaw.local

 

Note this is NOT https://. 

You will probably get a prompt to say that this sites is 

insecure -  ignore this and continue to the address. Not all routers allow you to do 
this as they do not resolve the allocated IP address to the default host name of 
ognpaw.local. In this case you will have to revert to using the allocated ip address as 
shown in the previous paragraph 3. 
 
With each connection type, when connected correctly, you will see the following 
prompts. Your response is the characters in 

red 

 

login: 

pi 

 

 

(Ensure this is pi NOT PI or Pi) 

password: 

12345678 

(This is the default Password. It is 

strongly 

recommended to change it 

during the configuration).     

(Note the password will not appear in the command 

line as you are typing it.)  

pi@ognpaw: $ 

cd rtlsdr-ogn 

 (changes the directory to where the required files are located) 

pi@ognpaw: /rtlsdr-ogn 

./PilotAware-OGN.config.sh   

(this runs the configuration program) 

Note please make sure that the syntax is correct if it is not you will be prompted that there 
is an error.  

 

You may get the message

     

sudo: unable to resolve host ognpa

w

 

         ignore 

this. 
 Wait a while and if the RTLSDR

’s are 

connected you will 

see 

Found 2 SDR’s

 and you will 

be told in which of the four USB slots they are located.   
The first SDR is required for FLARM 868MHz detection. By convention this is put in the top 
left hand USB slot with the RJ45 Ethernet socket to the left. The second SDR is for the 

Summary of Contents for OGN-R

Page 1: ...Aware equipped aircraft In addition as part of the installation you will get a real time on site Virtual RADAR station that can be displayed on a computer monitor or TV screen This will via the OGN R...

Page 2: ...ellinabox 8 Possible Problems 11 Testing to see if Your Station is Working 11 Checking for captured real time data 12 Checks to show that your OGN R station is Working OK 13 Other Apps to show that th...

Page 3: ...2 1A power supply 9 A simple mechanical timer to turn off the power once a day between 0200 0300 10 A Pigtail to connect the Co Axial cable to the 1090MHz RTL SDR 11 Antenna mounts to support the ant...

Page 4: ...are for your specific site Location Site Name Password and Email Address 5 Power up and test Location for the Electronics The location for the electronics should be as close to the antennas as practic...

Page 5: ...m apart Further away the better Only the PilotAware antenna is transmitting It transmits at 869 5MHz so will not affect or be affected by local VHF voice antennas Each and every installation will be b...

Page 6: ...he SMA connector on the PilotAware Bridge mounted as a Hat on top of the Raspberry Pi via the PIO connector 3 You will already have a Coaxial cable connected to the FLARM Antenna which is connected to...

Page 7: ...other USB sots in the configuration program described later If necessary external aluminium enclosures provided with the dongles should be removed Locating and Naming your Site Location Information Yo...

Page 8: ...he root of the SD card should contain the following folders defaults os overlays and many other files 5 When you have downloaded all the files eject the card from your computer and load the SD card in...

Page 9: ...s been developed so that you can run a shell from within a web browser Google Chrome or Firefox is recommended When connected on the same network as the Pi navigate to http ognpaw local Note this is N...

Page 10: ...e allocated to which frequency 868Mhz for Flarm or 1090MHz for ADSB and Mode C S You must then also ensure that correct antennas are connected to the correctly tuned RTL SDR The Flarm antenna will be...

Page 11: ...le to the FLARM antenna Suspect the co axial cable pigtail or RTLSDR connection Make sure all connections are secure and that the inner pins of the Co axial cable connectors are mating properly If you...

Page 12: ...ical due to local obstructions etc It will take several weeks to capture enough data to determine the range of your station There is a second useful URL https www dropbox com s 0n5emkw4nm85sw1 ogn r t...

Page 13: ...ing the uplink Only provided in the UK in Mode S 3D trial areas Checks to show that your OGN R station is Working OK To check that the OGN R station is working power up a PilotAware unit in the immedi...

Page 14: ...To see logging from Pilotaware Display Flarm P3i MLAT nc localhost 50002 Other Apps to show that the OGN R is working There are several Apps that can be used to show historical and real time data from...

Page 15: ...be shown on the screen with the normal limitations of multilateration MLAT These are i The target Mode S aircraft must have been interrogated by Primary RADAR This may not happen below 800ft ii There...

Page 16: ...this will appear At the top left corner there is a menu which when activated allows configuration of the screen The menu has several options It is not intended to go through each menu here as they are...

Page 17: ...ay Full operating instructions are available at as http www virtualradarserver co uk Please remember as good as PilotAware VRS is this must not be used for air traffic management control or guidance A...

Page 18: ...co uk n type female crimp connector hdf400 html N type Male to SMA https www wifi antennas co uk sma male to n type male adaptor html HDF 400 Crimp tool https www wifi antennas co uk catalogsearch re...

Page 19: ...bgear tv aerial stand off bracket 9 90874 tc HB3 ds_kid 92700024374092992 ds_rl 1248154 ds_rl 1245250 ds_rl 1247 848 gclid Cj0KCQiAw9nUBRCTARIsAG11eic35MmxwVB1JF2d8v2ONaZ0cGs15lNBii4W0G6 m0JDnaeCaNCID...

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