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

December 2019. 

 

                                                                              11 

Provide Station 

Height AMS

L (change default value to the value of your station). Return 

 
 
Provide 

Geoid

  Return 

Note the PilotAware Configuration program will calculate the GEOID and suggest what it 
is. Use this unless you have a more accurate GEOID figure  

 
The software will then install and calibrate the RTLSDR FLARM radio receiver. 
This will take about 90 seconds and it will step through 0dB to +50dB. Stages  
If all is well a banner will then be shown with your configuration as shown below. 
 Following this and after up to 10 minutes to connect to the server it will show Starting 
Services. The OGN-R station is now up and running. 
 

 

 

pi@ognpaw

:

~/rtlsdr-ogn 

 

Possible Problems

 

a)

 

If the SW cannot see the FLARM antenna through the RTL-SDR  dongle the software 
program proceeds through the calibration very quickly, This, means that there is no 
physical connection from the RTLSDR dongle 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 have an SWR 
meter available the impedance should be 40-60 ohms and the VSWR between 1 and 2 

b)

 

The calibration routine searches for GSM signals for the antenna and RTLSDR calibration. 
Therefore, you may have difficulty in capturing data in low GSM signal strength areas. So 
long as some data (Say 6-10 sites) is collected this is OK. This part of the setup is only 
used to calculate the frequency offset to be used for the particular antenna. 

c)

 

If after a successful calibration the program states that 

it cannot “start service”, this may 

be that it cannot get through your broadband router to the internet and hence to the 
OGN servers. If this is the case suspect your router or internet connection.  

 
When connected to the OGN servers via the internet, it can take up to 10 minutes for the 
station to appear on the OGN map 

http://ognrange.unseen.org

 

 
 
 

 
Testing to see if Your Station is Working 

Once your station has registered with the OGN servers it will be displayed on the OGN map.  

Содержание OGN-R

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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