Spurious and Russian Hex codes

[Anmer]

I need the "Relay Mode A/C Messages" ticked if I want Mlat traffic?

Where do you see that option?

As per BaseStation Reference Manual:

Message Filtering:

Ignore Non ADS-B Mode-S Messages: By default BaseStation receives and processes both ADS-B and non-ADS-B Mode-S messages. However, you can turn off the processing of non-ADS-B messages by checking the Ignore Non ADS-B Mode-S Messages checkbox.

Process Mode-S Air to Air Replies:
SBS-3 SBS-1eR SBS-1e, 1090 Puck

Enables forwarding by the SBS or Puck of Mode-S Air-to-Air Surveillance Replies (TCAS Replies). As these contain altitude information, this may enable BaseStation to display the altitude of non-ADS-B but Mode-S equipped aircraft, even when they are outside the coverage of Mode-S radar stations.

Enabling this feature will significantly increase the amount of data transmitted from the SBS or Puck to the PC, and hence the bandwidth required when connecting over a network.

This feature is available currently available only on the SBS-3, 1090 Puck and SBS-1e/eR and will also require a firmware update on the SBS-1e/eR if the firmware build number displayed by the Help >About BaseStation menu is less than 517.

Process TIS-B Messages:
SBS-3 SBS-1eR SBS-1e, 1090 Puck

This enables processing of TIS-B messages by BaseStation. These are similar to ADS-B messages, but are broadcast by radar ground stations, mainly in the USA to relay data about non-ADS-B aircraft, so that aircraft equipped with ADS-B receivers can "see" them.

This feature will require a firmware update on the SBS-1eR or SBS-1e if the firmware build number displayed by the Help > About BaseStation menu is less than 517.

Process ADS-R Messages:
SBS-3 SBS-1eR SBS-1e, 1090 Puck

This enables processing of ADS-R messages by BaseStation. These messages arise because there are two channels used for ADS-B in the USA. These are the 1090 MHz world-wide radar reply channel monitored by BaseStation, and also the 978 MHz UAT channel which uses a different transmission format. Ground stations in the USA are being equipped to re-broadcast data received on one channel as messages on the other channel. This allows differently equipped aircraft to be aware of each other.

This feature will require a firmware update on the SBS-1eR or SBS-1e if the firmware build number displayed by the Help > About BaseStation menu is less than 517.

TIS-B and ADS-R messages are intended to be transmitted from ground to air and normally will be received only if the antenna is within line-of-sight of a ground station.

Relay Mode A/C Messages:
SBS-3, 1090 Puck

This checkbox enables output of Mode A and C data on BaseStation's raw data output over Ethernet (port 30006). BaseStation does not currently use Mode A/C messages itself but they can be used by third party applications connecting to this port. Enabling this option will increase data bandwidth significantly.

Process Non-ICAO Addresses:
SBS-3 SBS-1eR SBS-1e, 1090 Puck

Aircraft or ground vehicles equipped with Mode S radar transponders use 24-bit addresses from a block allocated to each country by ICAO and which are unique to a particular aircraft or vehicle. This is the code that is displayed as a 6-character hexadecimal number by BaseStation. However ADS-B, TIS-B and ADS-R messages that do not originate from Mode S transponders are allowed to use a different set of 24-bit addresses that are not allocated by ICAO and do not have to be unique. This applies for example to certain ground vehicles. TIS-B messages may also use a 24-bit address made up of the 12-bit Mode
A (Squawk) code plus a 12-bit track number allocated by the radar station.

If you enable this feature then BaseStation needs to use special processing for the non-ICAO addresses to avoid incorrect lookup and display of countries, aircraft registrations etc. There is no way for BaseStation to determine the country for a non-ICAO address, and there is no guarantee that such an aircraft or ground vehicle will consistently use the same address.

As the database currently uses a fixed 6-character field for the aircraft address, BaseStation distinguishes non-ICAO addresses by modifying the first character of the displayed hex code as follows:

0 -> G
1 -> H
2 -> J
3 -> K
4 -> M
5 -> N
6 -> P
7 -> Q
8 -> R
9 -> S
A -> T
B -> U
C -> V
D -> W
E -> X
F -> Y

This means that the code does not conflict with the existing ICAO addresses in the database, while still fitting within the 6 character aircraft address field.

For the ModeA/Track number addresses (used by TIS-B only) the last digit is modified instead.

The setting Output Non-ICAO Addresses enables these aircraft to be output to the data port for use by third party applications. Leave this option unchecked if the application cannot handle the modified 6- character codes.

The setting Save Non-ICAO Addresses to DB enables saving of aircraft with these addresses to the database. Again, you can leave this option unchecked if the database is used by a third party application that cannot handle the modified 6-character codes.

Timeouts (Seconds): These parameters dictate how the application responds when it stops receiving messages from an aircraft.

If a preset number of seconds (configured using the Position Lost box) has elapsed since the time the last message was received, the aircraft changes to a state of "position lost", and is shown as yellow (by default) on both the Radar Screen and in the Aircraft List.

If a further period (set by the Signal Lost box) elapses without receiving a message, the aircraft changes to a state of "signal lost" and is removed from the Radar Screen and shown as red in the Aircraft List.

If a further period elapses without receiving a message (configured in the Remove box) then the aircraft is removed from the Aircraft List.

When a final period (set by the Delete box) has elapsed, the aircraft's data is purged completely from memory.

[Roadrunner]

Thanks Mike,


I do send data to PPlotter,  and for a short time more to FR24. I therefore need that option ticked, the others not so sure about


Mike

[Anmer]

Hi Mike

I don't see this option?

Relay Mode A/C Messages

Do you?

[Roadrunner]

Yes below the 3 entries that started this discussion. I have an SBS-3 connected to ethernet and feeding my PC

[attachment deleted reduce file load]

[Anmer]

Thanks Mike.

What version of BaseStation are you running?  I need to investigate why I don't see that option.

[Roadrunner]

Sorry about the delay in replying but got builders in an electricity on and off all the time.


Software Version : 1.2.4.185
Firmware Version :  SBS3 build 119.


I have a loft aerial. I got 23  Russians again in just the day yesterday (8 hour running period)


Regards Mike

[Anmer]

Thanks Mike.

I realised why I wasn't seeiong the same option. I'm not using an SBS-3 or Puck.

Maybe Chris was on the wrong track?

[Roadrunner]

Thanks,


Looks like I will re-check the other 3 options and just live with deleting them regularly. Today, a Saturday I have only had 5 Russians since 7 am to now.


Regards Mike

[egnx]

I had a look at my logged "Russian" modes and extracted just info relating to Mike's supplied list and put the data into excel.

Info for the attached files is:-

00_Russian_Data.zip/xlsx - Is my data extracted to Excel.

01_Russian_Daily_Total.jpg - Shows just the daily total received.

02_Russian_Daily.jpg - Shows daily total broken down by ModeS

03_Russian_Daily_Excluding_445566.jpg - Shows daily total excluding ModeS "445566"

04_Russian_Daily_445566.jpg - Shows daily total of only ModeS "445566"

Inforation releveant to my data is that up to September 2018 I was using an SBS1 connected via USB, after that I have been using an SBS1er connected via ethernet.

The jump up in 445566 reception does seem to coincide with the swap over.

Kelvin

[attachment deleted reduce file load]

[Roadrunner]

Could the jump be due to a higher sensitivity of the SBS-Ie, and even better with the SBS-3?

[egnx]

I guess that's a possibility, but i don't have any comparable data from the SBS-3 to check against.

[mhm]

Mike
I run an SBS 1 on a stand alone pc it has 650 Russian federation
I run an SBS Puck on a pc that's internet connected and it has 795 Russian Federation