How does it tell the difference between reflections off of mountains and the actual signal?
@thekraken20863 күн бұрын
Multipath is generally weaker than the actual signal so the actual signal lobe is dominant. However if the actual signal is blocked, and multipath is dominant, then the multipath lobe will be larger. That's okay if driving with the Kraken. Multipath lobes are mostly in random directions as we drive along, so over the mapped space the multipath averages out, and only the actual signal direction remains.
@aliyuk4 күн бұрын
Hello My Friend! what is the detection distance if you stand still?
@thekraken20863 күн бұрын
This is difficult to say because it depends on the transmission strength of the signal and terrain. Generally if you can receive the signal you can get a DOA lobe.
@13ANONIM00110 күн бұрын
I did it with the web interface, but I can't configure the android application….HELP
@thekraken20863 күн бұрын
Please ask on the forums for support.
@bentheguru4986Ай бұрын
Looks like you need to turn your array as it's off consistantly in a clockwise direction.
@spldrongАй бұрын
Very cool, im interested
@nenetmerideroАй бұрын
Qué radio de distancia tienen de alcance? Funcionan para cb27?
@robertomoyano15232 ай бұрын
Hola buenos días una consulta donde en que link puedo adquirir ese producto para poder realizar una compra
@thekraken20862 ай бұрын
www.mouser.com/c/?m=KrakenRF
@zerobow94132 ай бұрын
Nice one! -cool music
@Tawasy-vx3ce4 ай бұрын
Why u dont test to find or locate a drone in the air Using the same way ?
@frankthetank33424 ай бұрын
I need to figure out how to modify cells of the Radius Array Calculator, so that I can have a list of maybe 20 frequencies on 2m, and the corresponding Interelemental dimension, based on a static array size. In other words, if the dimension is 22.2", what multiplier is used for frequency of 146.520. What about 146.55, or 147.015, etc. Would be nice to have a quick way and make a small printable sheet. I'm sure it's possible, but I'm not a "freak in the sheets", as IT would say.
@frankthetank33425 ай бұрын
I was thinking about running a linear array for better resolution, and starting out with a handheld yagi, or loop antenna null, to get initial bearing. Plus, I dont have a permanent rack/mount that I can just throw onto roof with antennas hard-mounted and I dont have a template for circular. Making a linear array with a tape measure and eyeball would be easier. First, have to wait for decent buck converter to arrive next week. My chinese cigarette lighter adapter didn't provide enough amperage and the wifi kept dropping out.
@frankthetank33425 ай бұрын
I got my Kraken SDR when the first batch was released, but just hooked it up and played in house today. Looking forward to Fox Hunts in the coming months!
@frankthetank33424 ай бұрын
Do not use a generic USB data cable, even if thicker and literally brand new. Caused my setup to not work. Switched to 3ft Anker I had laying around and all good. Also, have a good 5v USB powersupply, or two separate ones. I bought a 30w down buck converter with dual USB C legs. Also bought some 5A cigarette adapter power supplies for backup. These two issues can have you pulling your hair out!
@cybersecuritydeclassified47935 ай бұрын
I love this product. About to order my second unit. I've got two arrays from Arrow Ant on their way! Thanks! -former senior wireless eng Walmart Stores.
@DemocracyManifest-vc5jn5 ай бұрын
Do you think you could throw this on a dji drone?
@kishascape7 ай бұрын
Don't be a little snitch.
@JETHO3215 ай бұрын
That's what I was going to say.
@kishascape7 ай бұрын
I would be interested to see this for intermittent transmissions. For hunting two way radio sites.
@YouTube_username.7 ай бұрын
That place looks nice
@naingaunglwin8337 ай бұрын
you should make a video about raspberry pi image configuration
@bitkurd57447 ай бұрын
Sir, I need find 0Hz~20KHz frequency, can you do that order for me, such as device full deuplex tx-rx and software for android?
@CA-FE-C0-FF-EE-007 ай бұрын
I really really love this project. I've been manually hunting a few times with a friend. We have found some "dumb" analog relays from the local authorities and once we even tracked down a foxhunt :) I really appreciate this awesome device and love the idea of implementing a navigiation into the app to help with convienince. I hope to get my hands on a KrakenSDR next year. Manual DOA is fun, but that device is so satisfying :D There are so many signals I am wondering about, and I would love to create a map of all misc transmitions in my hometown :) Thanks for the video! I am really wondering how few people are interested into those kind of videos. Maybe typical ham radio operator are "too old" for the hightech stuff and stick with old analog tracking technics, and the younger people, that are into SDR might not enjoy something like tracking down transmitter and antennas :D I love it tho, really curies for stuff like this.
@Joeteck9 ай бұрын
Can it find jammers on repeaters?
@Joeteck9 ай бұрын
How can I get one?
@Sugarsail19 ай бұрын
Their webpage says not to use the different band elements at the same time to avoid reflections. I'd be curious to see how it effects its RDF ability if you just had all the elements installed at the same time. I'd also be curious how big the bandwidth is for each size elements.
@dan_in_sd9 ай бұрын
Any luck with getting the image to run on a Banana Pi BPI-M64 (Allwinner A64 1.2GHz, with 2G RAM and WiFi ) ??
@dan_in_sd9 ай бұрын
is it possible to use 5 identical UHF antennas and 5 identical RF coax cables with SMA connector, just not the ones that came from Kraken.
@thekraken20869 ай бұрын
What you described is not a problem. It's best to match all five sets with a VNA.
@dan_in_sd9 ай бұрын
thanks! Please make more videos. For example: Linear Arrays: Why use them? What are they good for? etc. Airborne usage of Kraken: Whats it like to fly to a transmitter. etc. etc.
@thomasmaughan47989 ай бұрын
Impressive.
@JxH10 ай бұрын
I don't think that this system, as demonstrated, is quite achieving the theoretical maximum possible performance. Perhaps it's the cluttered environment. Might be worth debugging and fine tuning in a clear field (if you haven't already) to ensure that the messy directionality is purely a function of the complicated environment.
@aungmin975110 ай бұрын
Thank you very much for your video. My question is that can I use kraken sdr on 2.4GHz and 5.8GHz band without moving?
@thekraken208610 ай бұрын
The frequency range of the KrakenSDR is 24 MHz -1766 MHz.
@zerobow94132 ай бұрын
@@thekraken2086 Lets hope Krakan2 has 0-6Ghz -maybe based on the HackRF AD chipset or better
@user-bh7cx2ks2z11 ай бұрын
Congratulations, great project! I have a question, is it possible to use HackRF One in this project? I would like to get a wider range of frequencies, thanks in advance for your answer.
@thekraken208611 ай бұрын
It is not possible to use the HackRF with our software.
@dan_in_sd9 ай бұрын
You need (5) five phase coherent receivers and the correct software.
@cadeallen721011 ай бұрын
Cool video, what if an unknown number of transmitters are on a frequency?
@thekraken208611 ай бұрын
If there are multiple transmitters broadcasting at the same frequency over the same geographic area, then there can be issues and it will most likely just lock onto the strongest signal. You can experiment with the num sources setting in the GUI to try and get more than one bearing peak for each transmitter.
@bodstrup11 ай бұрын
Interesting, did not know how to use multiple VFO’s. I suppose this is only useful when moving around, not from a stationary setup like I use - as it appears to store estimated location for each frequency - not average bearing ? And - would prefer no ‘music’ - it is much louder than your voice, have to adjust volume up/dow every time you switch between talking and the ‘music’
@thekraken208611 ай бұрын
It will work on stationary setups too. The logs are the same as when using a single VFO, it logs the bearing data + location data. Estimated location isn't stored, that's all calculated from the bearings. The web mapper at map.krakenrf.com doesn't support multi-vfo yet however, it's only available in the Android app. I'm fairly certain I normalized the audio, but will try to keep that in mind for the next video.
@Johnny.P.Drizzle9 ай бұрын
@@thekraken2086 your audio levels are fine.
@sergeifil699011 ай бұрын
Good day. I don’t understand for work, do you need the Internet all the time for the program application to work? How is the link to the map done?
@sergeifil699011 ай бұрын
Good day. I don’t understand for work, do you need the Internet all the time for the program application to work? How is the link to the map done?
@thekraken208611 ай бұрын
You can download offline maps before you head out. But in urban environments you can just use your phones mobile internet connection to download them as required.
@sergeifil699011 ай бұрын
@@thekraken2086 What format are the cards in? I download the maps, insert them into the program and go.
@thekraken208611 ай бұрын
@@sergeifil6990 Can you clarify what do you mean by 'cards'?
@bodstrup11 ай бұрын
@@sergeifil6990If by cards you mean maps ? - nope, download them from within the Android app
@louisli948011 ай бұрын
Will the radius affect the accuracy? Wondering why choosing spacing factor as 0.19
@thekraken208611 ай бұрын
Yes, a larger spacing factor will provide better resolution.
@thekraken208611 ай бұрын
Adding that the reason for the small spacing factor is simply due to that being the largest size possible to fit on this vehicles roof.
@louisli948011 ай бұрын
I just found, is this a baking tray lol, I also used it for metal substrate. Btw, why the UCA radius was set to be so small, I used half wavelength but performed not so well, thanks in advance.
@thekraken208611 ай бұрын
Yep a baking tray is a good chunk of metal for a ground plane. With a larger spacing factor you can get better resolution, but you need to be under half a wavelength to avoid ambiguous bearings, and often it's best to have it around 0.45 max to ensure nothing approaching ambiguous bearings show up. The spacing factor will also depend on what's physically possible in terms of size.
@CrumResearch Жыл бұрын
Great! More examples, please. Is the 5-antenna product getting close to shipping?
@thekraken2086 Жыл бұрын
The five-antenna product, known as KrakenSDR, has been shipping for over a year.
@YouTube_username. Жыл бұрын
Cool tech thanks for the demo
@louisli8489 Жыл бұрын
Hi, I use my keyfob at 868MHz as a test, however, it seemed hard to transmit signal continuously, any advice of substitue for a simple signal transmitter at around 900MHz?
@thekraken2086 Жыл бұрын
On a budget you can buy cheap ISM band transmitters for microcontrollers or Raspberry Pi's. Or you could look up RPiTX and use a Raspberry Pi directly. If you were using a car key fob be careful! If you transmit with that too much out of the range of your car, you could invalidate the rolling code and lock yourself out of the car.
@bodstrup Жыл бұрын
That is a LOT of driving to find it. How does this approach compare going to a few, elevated positions and doing a DOA measurement from a static position to get an initial fix ?. If free from a lot of multipath signals, that should get you fairly close to the target ? Then repeating with a few measurements bracketing the target ?
@thekraken2086 Жыл бұрын
About 50 minutes of driving for this one (I edited out a quick lunch stop), with ~10 mins driving around the location to search houses for the antenna. The drive time of course depends on how far away the transmitter is. This TX ended up being 20km away from the starting location which according to Google maps is anywhere from a 26-55 minute drive at that time of the day depending on traffic, so the only real extra drive time was spent on the antenna search. If it was only a few kilometers away the drive time could be 5-10 minutes. You can also do manual triangulation from a hilltop with KrakenSDR, but actually that method takes significantly longer (drive to each elevated position, set up equipment, break down equipment, drive to next elevated position, triangulate, drive to TX, search for TX...), and of course doesn't work if there aren't any multipath free elevated positions within the reception range of the TX. Then if you chose bad positions and the TX is actually much further away than you thought so you don't get a good intersection, then you need to find new spots etc. It's easier to just drive closer and closer while automatically triangulating through the app, and end up directly at the TX for inspection.
@OllieVK Жыл бұрын
Kraken actually loves multipathing more than direct LOS. Watch the lobes on the top part of the screen. If you can get some height with it though it nails location pretty quickly.
@thekraken2086 Жыл бұрын
@@OllieVK You will definitely get more multipath corruption on the ground than when up on a hill with good LOS. But the beauty is that it doesn't really matter, because you can take so many readings while on the move that any multipath averages out. Also wanted to note that a lot of what might look like multipath corruption in the video is because I did not turn "pause data collection while stationary" on for this run. So when the car stops the GPS on the Android device doesn't get a quality heading, and the lobe bearing is hence wrong for the period of time when the car is stopped. Also with a small spacing factor for this frequency, multipath corruption becomes larger. If a larger array could fit on the car it would improve results. Regardless, the TX antenna was located to within a couple of meters, it would have just been a few minutes faster with a larger array.
@louisli8489 Жыл бұрын
Wondering which kind of signal is transmitted at 416.588MHz?
@zultandimitry572 Жыл бұрын
It is slow not reliable
@nombable11 ай бұрын
More details?
@zultandimitry572 Жыл бұрын
Is this the Interferometric method ?
@pcb7676 Жыл бұрын
Hello. I've been trying to replicate your results with no luck. Care to share any details about your setup or what settings you used in the gui ? Thank you.
@thekraken2086 Жыл бұрын
Give us some info about your setup and what is not working for you in the forums at forum.krakenrf.com. In the above test it's all default settings apart from the array size setting.
@VA3AGV Жыл бұрын
very interesting.
@mattweger437 Жыл бұрын
man if it went up to 6ghz id buy it in a heartbeat
@thekraken208611 ай бұрын
We are working on a 6GHz coherent receiver, but it will be a completely separate product. It will also be more expensive than the KrakenSDR.
@HM-fc7nd Жыл бұрын
Given we know the exact position of emitters , and assuming we use topographic maps . Could the setup self adjust it settings to make itself more accurate?
@thekraken2086 Жыл бұрын
That's something we'll be looking at in the future. To see if we can use known fixed transmitter sites to help calibrate out the effects of multipath. As of now it's just a possibility.
@thekraken2086 Жыл бұрын
Noting that it's not only topography that affects multipath. Different materials (dirt, sand, water, grass vs road vs forest etc), buildings, foliage type etc all change multipath properties.
@thehashslingingslasher19 Жыл бұрын
How well will this work for tracking moving multiple signals that are intermittent (say voice chat). All within 20 miles of an active base tower on the same frequency? Will there be too much noise?
@thekraken2086 Жыл бұрын
If multiple sources are being interleaved on the same channel it gets more difficult. You'd need to modify the code to somehow ignore the base tower transmissions on that frequency, and only focus on the mobile transmissions. If there is some sort of sub carrier squelch signal available that could be used. Then another problem is keeping track of each of the individual moving radios and matching them with the bearing logs. You'd need some way to ID each radio, again maybe with a squelch sub carrier signal, or similar. None of this is in the code since there are so many different systems, so it would totally be a custom coding job for your particular system.
@timhinchcliffe5372 Жыл бұрын
This is what I would want it for. It would need to be used in a "freestyle" mode where it won't bother trying to "guess" where it is on a map and the user just needs to use their head to "filter" out the signal corresponding to a particular voice. It looks like it sort of already does that.
@buckynine9 Жыл бұрын
Drone test it yet?
@68spc Жыл бұрын
Is there someone I can contact to about doing a presentation about this to my radio club?
@markmcgrath6812 Жыл бұрын
So I would need a raspberry pi to operate this device?
Пікірлер
How does it tell the difference between reflections off of mountains and the actual signal?
Multipath is generally weaker than the actual signal so the actual signal lobe is dominant. However if the actual signal is blocked, and multipath is dominant, then the multipath lobe will be larger. That's okay if driving with the Kraken. Multipath lobes are mostly in random directions as we drive along, so over the mapped space the multipath averages out, and only the actual signal direction remains.
Hello My Friend! what is the detection distance if you stand still?
This is difficult to say because it depends on the transmission strength of the signal and terrain. Generally if you can receive the signal you can get a DOA lobe.
I did it with the web interface, but I can't configure the android application….HELP
Please ask on the forums for support.
Looks like you need to turn your array as it's off consistantly in a clockwise direction.
Very cool, im interested
Qué radio de distancia tienen de alcance? Funcionan para cb27?
Hola buenos días una consulta donde en que link puedo adquirir ese producto para poder realizar una compra
www.mouser.com/c/?m=KrakenRF
Nice one! -cool music
Why u dont test to find or locate a drone in the air Using the same way ?
I need to figure out how to modify cells of the Radius Array Calculator, so that I can have a list of maybe 20 frequencies on 2m, and the corresponding Interelemental dimension, based on a static array size. In other words, if the dimension is 22.2", what multiplier is used for frequency of 146.520. What about 146.55, or 147.015, etc. Would be nice to have a quick way and make a small printable sheet. I'm sure it's possible, but I'm not a "freak in the sheets", as IT would say.
I was thinking about running a linear array for better resolution, and starting out with a handheld yagi, or loop antenna null, to get initial bearing. Plus, I dont have a permanent rack/mount that I can just throw onto roof with antennas hard-mounted and I dont have a template for circular. Making a linear array with a tape measure and eyeball would be easier. First, have to wait for decent buck converter to arrive next week. My chinese cigarette lighter adapter didn't provide enough amperage and the wifi kept dropping out.
I got my Kraken SDR when the first batch was released, but just hooked it up and played in house today. Looking forward to Fox Hunts in the coming months!
Do not use a generic USB data cable, even if thicker and literally brand new. Caused my setup to not work. Switched to 3ft Anker I had laying around and all good. Also, have a good 5v USB powersupply, or two separate ones. I bought a 30w down buck converter with dual USB C legs. Also bought some 5A cigarette adapter power supplies for backup. These two issues can have you pulling your hair out!
I love this product. About to order my second unit. I've got two arrays from Arrow Ant on their way! Thanks! -former senior wireless eng Walmart Stores.
Do you think you could throw this on a dji drone?
Don't be a little snitch.
That's what I was going to say.
I would be interested to see this for intermittent transmissions. For hunting two way radio sites.
That place looks nice
you should make a video about raspberry pi image configuration
Sir, I need find 0Hz~20KHz frequency, can you do that order for me, such as device full deuplex tx-rx and software for android?
I really really love this project. I've been manually hunting a few times with a friend. We have found some "dumb" analog relays from the local authorities and once we even tracked down a foxhunt :) I really appreciate this awesome device and love the idea of implementing a navigiation into the app to help with convienince. I hope to get my hands on a KrakenSDR next year. Manual DOA is fun, but that device is so satisfying :D There are so many signals I am wondering about, and I would love to create a map of all misc transmitions in my hometown :) Thanks for the video! I am really wondering how few people are interested into those kind of videos. Maybe typical ham radio operator are "too old" for the hightech stuff and stick with old analog tracking technics, and the younger people, that are into SDR might not enjoy something like tracking down transmitter and antennas :D I love it tho, really curies for stuff like this.
Can it find jammers on repeaters?
How can I get one?
Their webpage says not to use the different band elements at the same time to avoid reflections. I'd be curious to see how it effects its RDF ability if you just had all the elements installed at the same time. I'd also be curious how big the bandwidth is for each size elements.
Any luck with getting the image to run on a Banana Pi BPI-M64 (Allwinner A64 1.2GHz, with 2G RAM and WiFi ) ??
is it possible to use 5 identical UHF antennas and 5 identical RF coax cables with SMA connector, just not the ones that came from Kraken.
What you described is not a problem. It's best to match all five sets with a VNA.
thanks! Please make more videos. For example: Linear Arrays: Why use them? What are they good for? etc. Airborne usage of Kraken: Whats it like to fly to a transmitter. etc. etc.
Impressive.
I don't think that this system, as demonstrated, is quite achieving the theoretical maximum possible performance. Perhaps it's the cluttered environment. Might be worth debugging and fine tuning in a clear field (if you haven't already) to ensure that the messy directionality is purely a function of the complicated environment.
Thank you very much for your video. My question is that can I use kraken sdr on 2.4GHz and 5.8GHz band without moving?
The frequency range of the KrakenSDR is 24 MHz -1766 MHz.
@@thekraken2086 Lets hope Krakan2 has 0-6Ghz -maybe based on the HackRF AD chipset or better
Congratulations, great project! I have a question, is it possible to use HackRF One in this project? I would like to get a wider range of frequencies, thanks in advance for your answer.
It is not possible to use the HackRF with our software.
You need (5) five phase coherent receivers and the correct software.
Cool video, what if an unknown number of transmitters are on a frequency?
If there are multiple transmitters broadcasting at the same frequency over the same geographic area, then there can be issues and it will most likely just lock onto the strongest signal. You can experiment with the num sources setting in the GUI to try and get more than one bearing peak for each transmitter.
Interesting, did not know how to use multiple VFO’s. I suppose this is only useful when moving around, not from a stationary setup like I use - as it appears to store estimated location for each frequency - not average bearing ? And - would prefer no ‘music’ - it is much louder than your voice, have to adjust volume up/dow every time you switch between talking and the ‘music’
It will work on stationary setups too. The logs are the same as when using a single VFO, it logs the bearing data + location data. Estimated location isn't stored, that's all calculated from the bearings. The web mapper at map.krakenrf.com doesn't support multi-vfo yet however, it's only available in the Android app. I'm fairly certain I normalized the audio, but will try to keep that in mind for the next video.
@@thekraken2086 your audio levels are fine.
Good day. I don’t understand for work, do you need the Internet all the time for the program application to work? How is the link to the map done?
Good day. I don’t understand for work, do you need the Internet all the time for the program application to work? How is the link to the map done?
You can download offline maps before you head out. But in urban environments you can just use your phones mobile internet connection to download them as required.
@@thekraken2086 What format are the cards in? I download the maps, insert them into the program and go.
@@sergeifil6990 Can you clarify what do you mean by 'cards'?
@@sergeifil6990If by cards you mean maps ? - nope, download them from within the Android app
Will the radius affect the accuracy? Wondering why choosing spacing factor as 0.19
Yes, a larger spacing factor will provide better resolution.
Adding that the reason for the small spacing factor is simply due to that being the largest size possible to fit on this vehicles roof.
I just found, is this a baking tray lol, I also used it for metal substrate. Btw, why the UCA radius was set to be so small, I used half wavelength but performed not so well, thanks in advance.
Yep a baking tray is a good chunk of metal for a ground plane. With a larger spacing factor you can get better resolution, but you need to be under half a wavelength to avoid ambiguous bearings, and often it's best to have it around 0.45 max to ensure nothing approaching ambiguous bearings show up. The spacing factor will also depend on what's physically possible in terms of size.
Great! More examples, please. Is the 5-antenna product getting close to shipping?
The five-antenna product, known as KrakenSDR, has been shipping for over a year.
Cool tech thanks for the demo
Hi, I use my keyfob at 868MHz as a test, however, it seemed hard to transmit signal continuously, any advice of substitue for a simple signal transmitter at around 900MHz?
On a budget you can buy cheap ISM band transmitters for microcontrollers or Raspberry Pi's. Or you could look up RPiTX and use a Raspberry Pi directly. If you were using a car key fob be careful! If you transmit with that too much out of the range of your car, you could invalidate the rolling code and lock yourself out of the car.
That is a LOT of driving to find it. How does this approach compare going to a few, elevated positions and doing a DOA measurement from a static position to get an initial fix ?. If free from a lot of multipath signals, that should get you fairly close to the target ? Then repeating with a few measurements bracketing the target ?
About 50 minutes of driving for this one (I edited out a quick lunch stop), with ~10 mins driving around the location to search houses for the antenna. The drive time of course depends on how far away the transmitter is. This TX ended up being 20km away from the starting location which according to Google maps is anywhere from a 26-55 minute drive at that time of the day depending on traffic, so the only real extra drive time was spent on the antenna search. If it was only a few kilometers away the drive time could be 5-10 minutes. You can also do manual triangulation from a hilltop with KrakenSDR, but actually that method takes significantly longer (drive to each elevated position, set up equipment, break down equipment, drive to next elevated position, triangulate, drive to TX, search for TX...), and of course doesn't work if there aren't any multipath free elevated positions within the reception range of the TX. Then if you chose bad positions and the TX is actually much further away than you thought so you don't get a good intersection, then you need to find new spots etc. It's easier to just drive closer and closer while automatically triangulating through the app, and end up directly at the TX for inspection.
Kraken actually loves multipathing more than direct LOS. Watch the lobes on the top part of the screen. If you can get some height with it though it nails location pretty quickly.
@@OllieVK You will definitely get more multipath corruption on the ground than when up on a hill with good LOS. But the beauty is that it doesn't really matter, because you can take so many readings while on the move that any multipath averages out. Also wanted to note that a lot of what might look like multipath corruption in the video is because I did not turn "pause data collection while stationary" on for this run. So when the car stops the GPS on the Android device doesn't get a quality heading, and the lobe bearing is hence wrong for the period of time when the car is stopped. Also with a small spacing factor for this frequency, multipath corruption becomes larger. If a larger array could fit on the car it would improve results. Regardless, the TX antenna was located to within a couple of meters, it would have just been a few minutes faster with a larger array.
Wondering which kind of signal is transmitted at 416.588MHz?
It is slow not reliable
More details?
Is this the Interferometric method ?
Hello. I've been trying to replicate your results with no luck. Care to share any details about your setup or what settings you used in the gui ? Thank you.
Give us some info about your setup and what is not working for you in the forums at forum.krakenrf.com. In the above test it's all default settings apart from the array size setting.
very interesting.
man if it went up to 6ghz id buy it in a heartbeat
We are working on a 6GHz coherent receiver, but it will be a completely separate product. It will also be more expensive than the KrakenSDR.
Given we know the exact position of emitters , and assuming we use topographic maps . Could the setup self adjust it settings to make itself more accurate?
That's something we'll be looking at in the future. To see if we can use known fixed transmitter sites to help calibrate out the effects of multipath. As of now it's just a possibility.
Noting that it's not only topography that affects multipath. Different materials (dirt, sand, water, grass vs road vs forest etc), buildings, foliage type etc all change multipath properties.
How well will this work for tracking moving multiple signals that are intermittent (say voice chat). All within 20 miles of an active base tower on the same frequency? Will there be too much noise?
If multiple sources are being interleaved on the same channel it gets more difficult. You'd need to modify the code to somehow ignore the base tower transmissions on that frequency, and only focus on the mobile transmissions. If there is some sort of sub carrier squelch signal available that could be used. Then another problem is keeping track of each of the individual moving radios and matching them with the bearing logs. You'd need some way to ID each radio, again maybe with a squelch sub carrier signal, or similar. None of this is in the code since there are so many different systems, so it would totally be a custom coding job for your particular system.
This is what I would want it for. It would need to be used in a "freestyle" mode where it won't bother trying to "guess" where it is on a map and the user just needs to use their head to "filter" out the signal corresponding to a particular voice. It looks like it sort of already does that.
Drone test it yet?
Is there someone I can contact to about doing a presentation about this to my radio club?
So I would need a raspberry pi to operate this device?