Rundradion @rundradion Twitter profile | Pikagi

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Rundradion

@rundradion

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Joined September 2009

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@rundradion

Rundradion

4 months

@MantasRukuiza Feels like i explained this a hundred times... All commercial aircraft are equipped with an ADS-B transponder. This broadcasts the position of the aircraft to everyone around it telling position, altitude, speed, type of aircraft, heading and a bunch of other parameters.

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@rundradion

Rundradion

17 days

After a week and around 100k wasted screenshots i finally caught the Baltic Jammer (or its sea-based twin?) during a whole session. The clip was recorded May 27-28:th. Timestamps are (GMT+2) Antenna at 20m ASL from south-east Sweden pointing around 135 degrees to the south east.

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@rundradion

Rundradion

2 months

Several ships calling out "having no GPS for hours" last night. Not sure what to make of this, if its "man-made" or a technical issue. At a first glance it does not seem to affect positions reported by AIS.

@rundradion

Rundradion

2 months

@HrKrog @auonsson Checked my VHF16 logs... VENTA MAERSK called out on VHF16 at 00:58 UTC asking if anyone else had GPS-issues. LALIQUE confirmed, so did LADY HELENE and stated quote "for several hours" Not sure what to make of this. If LADY HELENE had issues for hours, its a big area.

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@rundradion

Rundradion

5 months

So this map shows GNSS-interference during daytime yesterday the 13:th. I added all Russian flights (ICAO-hex starting with 15). Red=bad navigation accuracy. Green=good navigation accuracy. 🤔

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@rundradion

Rundradion

2 years

@IntelDoge Correct. Someone does not know what a CDN does. If you (as a visitor) gets routed via Moscow, YOU are the one closer to Russia, not the server. The purpose of a CDN is to direct you to the distribution point closest to you, with a cached copy of the site.

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@rundradion

Rundradion

2 months

We are now into the longest silence from the Baltic Jammer since the start. 8 days 13 hours of lovely GNSS-reception, since March 28:th. This does coincide with a An-124 landing on the 29:th. The question is what they left or came with... (Previous An-124 visit January 23:rd)

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@rundradion

Rundradion

6 months

GPS interference in the south Baltic sea continued over new years celebrations. Someone had to work that big antenna. Starting at 22:20 (GMT +1) on New Year's Eve and ending 05:30 on New Year's Day. (Red track means GPS accuracy is >10 NM or unknown)

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@rundradion

Rundradion

3 months

Noticed a deviation today. The first picture shows all Russian flights to from Kaliningrad the last 30 days (hex 15xxxx). Totaling 1150819 positions. One flight, today, SVR167 (RA-73792/152040) reported a different path than all other flights, going over Latvia and Lithuania.

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@rundradion

Rundradion

2 months

A few minutes ago STIKLESTAD, AURORA ONE and RAN DF confirmed total loss of GPS. Quote from STILKESTAD "All GPS is gone".

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@rundradion

Rundradion

5 months

Graveyard shift started at the old anti-GNSS-ray plant. A first sip of a cup of coffee, aim antenna and then press the button. Like we always do at 22:20 (GMT +1) This makes it the 13:th documented session and totaling over 110 hours since the 15:th December.

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@rundradion

Rundradion

1 month

This is probably the Baltic Jammer (or its sea based brother) and how it looks on the radio spectrum. I managed to get a Inmarsat antenna up on the 28:th at the south east corner of Sweden and pointed it south east (~135° 20m ASL) as the AIS/GPS issues was ongoing.

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@rundradion

Rundradion

3 months

Baltic Jammer Sunday evening session started at 21:00 (GMT +1)

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@rundradion

Rundradion

5 months

DLH892 from Frankfurt to Riga is todays representative to show when the anti-GNSS-ray was turned on. It was in the right spot at 22:33 (GMT +1) when someone pressed the button, and lost an accurate GPS-signal. Since Planefinder has poor MLAT coverage its very visible with them.

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@rundradion

Rundradion

6 months

By looking at ADS-B frames with NACp 7 or lower we can draw a simple polygon by hand and visualize what has been affected (within my receiver range). Though i would say, listening in on ATC, the issue looks the same all over south-eastern Poland at least.

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@rundradion

Rundradion

3 months

Baltic Jammer started at 22:38 (GMT +1) yesterday and still running.

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@rundradion

Rundradion

3 years

@Krux_22 Djuplodande intervju med "testbildsavdelningen" på SVT. Nördigt men mycket intressant!

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Finns testbilden kvar?

En kompis till mig (vi kan kalla honom Magnus) slog på TV:n och framför honom uppenbarade den sig: testbilden! Finns den kvar? Och i så fall vad var den för ...

www.youtube.com

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@rundradion

Rundradion

3 months

Ended with 63 hours and 40 minutes at 14:18 (GMT +1) this afternoon. First 24 hours was with full/regular power (Sweden, Germany, Poland) and after that almost 40 hours reduced to what can be described as covering Polish airspace only.

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@rundradion

Rundradion

2 months

@HrKrog @auonsson Checked my VHF16 logs... VENTA MAERSK called out on VHF16 at 00:58 UTC asking if anyone else had GPS-issues. LALIQUE confirmed, so did LADY HELENE and stated quote "for several hours" Not sure what to make of this. If LADY HELENE had issues for hours, its a big area.

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@rundradion

Rundradion

6 months

And while i was compiling the last post, someone flicked the switch again, and we are again experiencing GPS-outages since ~22:30 (GMT +1)

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@rundradion

Rundradion

6 months

Took a look back on the events with GPS interference in the south Baltic sea. There seems to be six nightly events of 5-7 hours and one stretching ~40 hours. (The graphs are based on 3.7 million ADS-B frames from south of Sweden collected using off-the-shelf ADS-B hardware.)

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@rundradion

Rundradion

5 months

Not seeing any wide activity yet tonight in the Baltics regarding GPS interference, but we have some local issues south of Gdansk in Poland. Traffic at this time is low but SAS94Y and CCA838 had a streak of 0:s around 22:40. It was also visible on

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@rundradion

Rundradion

5 months

No visible issues yet with GNSS today during Putins visit to Kaliningrad. (Time GMT +1)

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@rundradion

Rundradion

5 months

Baltic Sea GNSS interference December 1, 2023, to January 17, 2024. Thanks to @auonsson for the tooltip!

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@rundradion

Rundradion

2 months

We can add CELTIC PIONEER and SEACON 8 to the list of quote "no GPS"as of this post

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@rundradion

Rundradion

5 months

Not yet seeing the regular anti-GNSS-ray today in the Baltic sea A few blips south of Gdansk with interference but my reach is limited over Poland. Planefinder shows a different story where at least two planes lost sat-navigation over Poland. Antenna pointing more south today?

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@rundradion

Rundradion

2 months

Looks like the Baltic Jammer had sort of a session last night. Not the usual pattern though where its not reaching into Sweden and western Poland. To get a hint when it started, looking at RYR2354/48C2A8 who where in the area, it dropped NACp from 11 to 0 at 00:17 (GMT+2).

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@rundradion

Rundradion

5 months

...and at 06:15 the shift was over. "But, does it not always look like this?" Lets take a look... Picked a random date in October and yes, there are some minor issues but nothing like this over Sweden, Germany and Poland.

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@rundradion

Rundradion

4 years

@lambdaprog Meet the family :)

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@rundradion

Rundradion

17 days

Most interesting frame out of all 3804 in this clip i would say is this, ending the session.

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@rundradion

Rundradion

5 months

Like clockwork the GNSS interference are back in the south Baltic sea, starting at 22:20 local time (GMT +1). Reported GPS accuracy from aircraft being steady during the day, now drops significantly.

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@rundradion

Rundradion

5 months

On.

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@rundradion

Rundradion

3 months

@auonsson And we are now heading into unknown territory as this session is the longest yet. (It has a tiny asterisk as it is currently not affecting mainland Sweden, but still) 48 hours 40 minutes as of this post.

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@rundradion

Rundradion

5 months

@notch Also, even though i know its a machine, i surprise myself a bit by being very polite.

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@rundradion

Rundradion

5 months

Perhaps i should only report when there are no GPS interference from now on. :) At 22:20 (GMT +1) with better timing than Swedish trains, we are back at it again. As you can see on location unknown or bad and the position is given via MLAT, not ADS-B.

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@rundradion

Rundradion

6 months

"...and at 05:30, after 7 hours the operators shook hands and congratulated each other for a work well done"

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@rundradion

Rundradion

4 months

Look whos back after almost a week of silence... On at 21:51 (GMT +1)

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@rundradion

Rundradion

5 months

ON @ 22:46 (GMT +1) Looks like the "night" profile where exit from Kaliningrad to the north is closed (and with that, a larger area including Sweden affected) Pic 3 from the 13:th shows an example of the "day" profile where exit from Kaliningrad is open.

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@rundradion

Rundradion

3 months

And we are back at it again. The crew at the antenna got 6 hours of. Starting at 21:03 (GMT +1) interference with "regular" coverage is back, covering Sweden, Poland and Germany.

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@rundradion

Rundradion

5 months

@SignalsEta Made a quick clip showing a week back, up to now. Nice catch!

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@rundradion

Rundradion

1 year

@petterbristav Grattis! Det här kommer bli bra! Snälla ta nu bort tester där poäng delas ut av programledaren. Det ska vara mätbara resultat, en tävling, inte godtyckligt poängsättande typ "vem ritade den finaste teckningen".

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@rundradion

Rundradion

6 months

And we are back again today the 28:th. As yesterday, all normal until 22:32 when the nightshift started for someone. Times are local/CET because im lazy.

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@rundradion

Rundradion

4 months

The Baltic Jammer turned on yesterday at 22:41 (GMT +1), and is still running as of 06:27 (GMT +1)

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@rundradion

Rundradion

6 months

Follow along on

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@rundradion

Rundradion

4 months

After a week of silence, there is once again a faint buzz from the RF amplifiers. Baltic GNSS interference started at 21:13 (GMT +1)

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@rundradion

Rundradion

3 months

Baltic Jammer ran from 23:14 to 05:10 (GMT +1)

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@rundradion

Rundradion

9 months

@auonsson There is also extremely good conditions on VHF currently due to weather which increases the reach of the AIS signals by 5-6 times. This could give strange data to MT due to the increase in number of stations delivering the same AIS-packet. Graph shows a Baltic MT receiver.

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@rundradion

Rundradion

15 years

Provar att skriva mitt första meddelande på Twitter. Funkar detta?

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@rundradion

Rundradion

1 month

Since looking into a unknown part of the spectrum like this, the confirmation bias meter was through the roof, so i have done two days of time-lapse to see if these two bumps came back. They have not. This clip shows how it has been from the morning on the 29:th and onwards.

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@rundradion

Rundradion

1 month

@chrisschmitz @giammaiot2 @Aaronia_AG I got a chunk of I/Q from the 28:th of April when we had issues with AIS close to south-east Sweden. Since the jammer was present that close to ground (my antenna ~20m ASL) it was probably based at sea closer to Sweden than the one we have seen since last year.

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@rundradion

Rundradion

3 months

So, seems like the Baltic Jammer has been on since yesterday, and i have been sleeping at work. Totally missed that one. Started at 22:43 (GMT +1)

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@rundradion

Rundradion

3 months

Baltic Jammer On at 22:38 (GMT +1) Off at 04:05 (GMT +1) A bit shorter run today.

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@rundradion

Rundradion

3 months

Nice! (Hats of to @lemonodor for being the OG and inspiration for all of us with !)

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@rundradion

Rundradion

6 months

Looking at some specific flights over the Baltics. The 25:th AirBaltic BTI84F/502D3E seems to loose GPS at 15:29 (local time) and get it stable again at 16:08 over Germany. NACp values of 8-9 and all of a sudden 0. Picture two a few days prior. @auonsson @lemonodor @giammaiot2

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@rundradion

Rundradion

5 months

Time to punch in! Shift started at 22:17 (GMT +1) Asked DALL·E what it looked like on site, and got pic 2.

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@rundradion

Rundradion

3 months

Baltic Jammer On 23:18 (GMT +1) Off 05:23 (GMT +1)

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@rundradion

Rundradion

5 months

The topic here has been mostly on complete loss of GPS-signal, but here is an example of degraded accuracy. Pic 1, SAS1428 (4AC94F) from Copenhagen to Stockholm, accuracy goes from <30 m to <93 m Pic 2, same aircraft 4AC94F an hour earlier, before the interference started.

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@rundradion

Rundradion

1 year

@kenshirriff Cool! I bought a stack of overhead transparencies around 10 years ago, when more actively cpu-collecting, that belonged to a engineer at Intel. These where claimed to be used internally at Intel for presentations when developing the 8086.

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@rundradion

Rundradion

3 months

Baltic Jammer currently on since 23:28 (GMT +1) yesterday.

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@rundradion

Rundradion

4 months

@MantasRukuiza So quite regularly since December 15 th (see my spreadsheet-posts), there is 7 to +40 hour sessions where aircraft over Poland, Sweden and Germany has its GPS-signal jammed. This is not an emergency since it has other systems to navigate but its definitely not good.

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@rundradion

Rundradion

3 months

Äntligen! 🥂 Nu kommer de stora frågorna... Amplitudmodulering eller frekvensmodulering? ✈️

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@rundradion

Rundradion

6 months

And its on again since about 10-15 minutes ago. Looking normal all day, and now it just drops. Can be verified by aircraft loosing signal. WMT8VB/471F59

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@rundradion

Rundradion

21 days

It was not only B-52:s that flew close to Sweden this morning... 👀

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@rundradion

Rundradion

1 month

I get the bump for L1 at 1575.42 MHz, but at ~1561 MHz... BeiDou? (Please note that this is in no way a scientific approach, just a glimpse into the radio spectrum from an amateur perspective.)

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@rundradion

Rundradion

5 months

Changes... Looks like there will be a night+day+night because interference over Sweden came back att 22:15. Never seen that except for 25-27 december. Note over Sweden Pic 1, daytime, no interference Pic 2, nighttime, interference

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@rundradion

Rundradion

6 months

You can probably see when the "death ray" was turned on on the 25:th (being a death ray is pure speculation, could be some other type of ray) If you take an aircraft traveling in the area at 15:23 it suddenly drops GPS after having no issues.

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@rundradion

Rundradion

3 months

At a first glance it stopped at 08:19 (GMT +1). Still some aircraft affected in north east Poland and northern Germany. Looks like it continues with either less power or a more narrow direction. @auonsson what does your data look like? I have limited reach from my receiver...

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@rundradion

Rundradion

3 months

As @auonsson found there is a change in the area covered. The reduction is not as big as on the 18:th but there seems to be no interference north of N56.00 since 22:40 (GMT +1) yesterday.

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@rundradion

Rundradion

5 months

There we go. After a day of silence, back at 22:07 (GMT +1)

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@rundradion

Rundradion

2 years

@dlauer Previous owner had a radio scanner, listening to police, air, marine etc. This is a discone, an antenna with wide frequency range and therefor multiple uses and bands.

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@rundradion

Rundradion

4 months

@MantasRukuiza I have been monitoring this NACp-parameter for almost a year and a half in the south Baltics, and in mid December there was a big change in the average graphs, which shows there is something interfering with the GPS-signal that the aircraft receives. Someone is jamming it.

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@rundradion

Rundradion

3 months

@lemonodor @auonsson Yes, the Baltic Jammer was active all day yesterday March 13:th until 21:53 local Polish time. The session was a bit longer than usual at around 23 hours but no, nothing we have not seen before.

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@rundradion

Rundradion

3 months

Lets celebrate Sweden joining Nato with some GNSS-interference shall we? Started at 21:07 (GMT +1)

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@rundradion

Rundradion

6 months

@lemonodor @ADSBex Im logging NACp locally from own receivers in this area (south east Sweden) and have seen anomalies the last two weeks. Some quite drastic drops, almost like you switch something on or off.

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@rundradion

Rundradion

2 months

Running again at 22:55 (GMT +2)

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@rundradion

Rundradion

6 months

And to clarify, there are ADS-B packets received during the gap above, its just that the aircraft is reporting the quality of GPS-signal as 0 (on a scale from 1-11). Se frame from 22:55

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@rundradion

Rundradion

3 months

So two more days of possible GNSS-interference. Then all back to normal. Right? (Polish NOTAM)

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@rundradion

Rundradion

4 months

This looks to be the longest session i have seen. Closing in on 38 hours its on par with the 25-27th December 38:05 run. The difference this time is that the coverage is still to the west and south since 08:15 (GMT +1) yesterday.

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@rundradion

Rundradion

5 months

After a 32 hour run ending yesterday morning we did not see any activity yesterday evening, and the night to today was uneventful. But as of 22:20 we are again seeing the same nightly interference we have seen since mid December.

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@rundradion

Rundradion

5 months

Like clockwork the interference stopped at 05:20 as we have seen the last week or so.

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@rundradion

Rundradion

5 months

There we go! At 21:17 (GMT +1) we are back with the graph and map we know so well. Hammering away on those radio waves.

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@rundradion

Rundradion

5 months

GNSS-interference = ON (22:10 GMT +1)

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@rundradion

Rundradion

5 months

The area affected seems to be at least the same as before, by drawing a simple polygon by hand. Please note that this is NOT the whole area, just what i can receive. Tracks shown are ADS-B frames with NACp (GPS-quality) ≤ 6.

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@rundradion

Rundradion

5 months

"Feeling well rested from a day off, the operators sat down at the control board at 22:30, and do the same thing as the last few weeks" At 22:30 (GMT +1) we are back with the regular GNSS interference.

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@rundradion

Rundradion

5 months

The accuracy can be seen on in the left pane. Normal values range from about < 3 m to 30m

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@rundradion

Rundradion

2 months

Another session last night from 22:37 to 06:00 (GMT+2) Does not seem to have quite the same reach into Sweden as usual.

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@rundradion

Rundradion

3 months

@poeptor1 Yeah, that beam becomes very wide so the selection is not around individual aircraft, but more which country to affect.

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@rundradion

Rundradion

5 months

@auonsson RU + bad nav

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@rundradion

Rundradion

5 months

Looks like another 24h run as we are still running at 07:30 (GMT +1) Switched to the day profile at around 05:30 where interference is only to the west and south. Timed with the first flight AFL1009 taking of from Kaliningrad. How convenient.

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@rundradion

Rundradion

5 months

@auonsson Yes. Same with the previous 24h run on the 10th. One profile ~22:20 - 05:30, and another ~05:30 - 22:20. Could say, closed during the night, open during the day. There are not that much data during the night due to low traffic but AFL1009 shows the difference.

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@rundradion

Rundradion

5 months

This Wizzair plane had issues all the way down to about 10000ft going in for landing in Gdansk.

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@rundradion

Rundradion

16 days

@Gnarfle_sc2 @hullu_rakkaus @ManiacMagic1 Sorry if i was unclear. Yes the receiving antenna is in Sweden. Where the transmitter is beats me...

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@rundradion

Rundradion

4 months

Well hello there! Back again at 21:32 (GMT +1) after silence since the 11:th February

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@rundradion

Rundradion

2 months

@auonsson FR24 lost them somewhere here on the 30th

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@rundradion

Rundradion

5 months

@HonkIYBonk2 Its a standard ADS-B receiver (Raspberry Pi, USB-dongle and antenna) i have in the area which receives the information from the aircraft. I log the traffic and draw conclusions from it :)

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@rundradion

Rundradion

3 months

Well well. The Baltic Jammer back again at 05:12 (GMT +1) First time we see a start in the morning of all 36 documented sessions.

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@rundradion

Rundradion

4 months

Still running but changed coverage at 08:15 (GMT +1). Issues are most dominant to the west and south. Inland Sweden looks ok after 08:15.

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@rundradion

Rundradion

2 months

Looks like the Baltic Jammer are back again in full force since 22:36 (GMT +2) yesterday and is currently running.

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@rundradion

Rundradion

3 months

On yesterday at 21:00 (GMT +1) and still running.

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@rundradion

Rundradion

4 months

On @ 21:13 (GMT +1)

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@rundradion

Rundradion

5 months

A little trickier to spot the end today but if examine the actual ADS-B frames the last bad report (NACp≤0) came from QTR49K at 06:12. To put that in perspective, there has been ~22000 ADS-B-frames since 06:12 (1 hour 12 minutes) and not a SINGLE one being bad.

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