Need help with radar

[stuck wigeon]

I need help and I don't know where to look for information or anyone to guide me.

I want to follow and see some aircraft when I enter my private area, the problem is that they are aircraft that come out blocked or not in radarbox, flightradar24 or similar, the only thing I've seen that can help me would be anti drone radars or something similar, if anyone has a way to help me or give me information I would appreciate it.

Thank you very much in advance.

[wind trellis]

Hi. If the aircraft in question have active ADS-B or Mode-S transponders, and there are sufficient feeders in the area receiving those signals, ADSBexchange should show the aircraft. If the aircraft do not have such (active) transponders, ADSBexchange has no way to track them.

[faint gazelle]

@stuck wigeon well use https://globe.adsbexchange.com, we don’t block anything.

[stuck wigeon]

Is there anything I can do, any device I can buy or anything similar?

[stuck wigeon]

Is there any way to detect what enters the airspace in the area I need?

[faint gazelle]

Besides a tracking site? I mean if you have a million dollars (or your local equivalent) lying around you could put up your own radar.

Unless the area just needs a feeder you can put up one for about $100-$150. But I f it doesn’t transmit ADSB then the only other way to see it is an actual radar.

[stuck wigeon]

They have ads-b but they deactivate it, why I never see it reflected on the web, if I set up a feeder or something do you think I can see it?

[stuck wigeon]

I do not have anything installed, I live next to an airport just 2km away, the thing is that when I look for only 2/3 aircraft in the area, however medical and police helicopters H135 and AS365 N3+ that are supposed to have ads-b but I think they deactivate it or I do not know what they do.

[wind trellis]

If you think that they might be transmitting ADS-B, you could set up your own receiver / feeder - https://www.adsbexchange.com/ways-to-join-the-exchange/

[faint gazelle]

If it’s actually off no, but it’s possible the feeder coverage in your area isn’t great. If they are mode-s it takes 4 feeders to see it at the same time to get a location.

[trim escarp]

Lemonador built a tool that works with your ADSBx feeder that lets you get alerted when certain planes are detected by your feeder. I don't have the link handy right now.

[stuck wigeon]

is there anything I can do on my own to increase coverage and make sure I detect ads-b and mode-s and have the best coverage possible? What is the most powerful thing I can set up on my own?

[wind trellis]

setup your own feeder as described at the link above, with good quality coax and antenna placed where it has a clear view of the sky

There are other things you could do, like additional filtering, LNA at the antenna, etc., but they probably aren't necessary

[unique veldt]

I usea program called planefence to alert me (on discord) of any places passing within x miles of my feeder (or any spot). I think it's pretty cool and also gives you special alerts about interesting planes (like famous people's jets, military, and medical)

[stuck wigeon]

With this I will see more aircraft than I see without a feeder?

[wind trellis]

it depends on how many feeders are already established in your area, and their quality

[stuck wigeon]

But if I am the only one in my area, would it be enough to mount the feeder even for a small area?

[unique veldt]

If you are the only feeder around you wont get any mode s planes, but you can get a good number of adsb planes

Depending on your hardware and placement of the antenna

[wind trellis]

You will get the Mode-S ones - you just won't get positions for them

[stuck wigeon]

And if I mount several feeders then could I?

[stuck wigeon]

No understand this, can you explain me pls?

[unique veldt]

Yea thats what i meant

[wind trellis]

Mode-S transponder data does not include the position (location) of the aircraft. To determine positions, a process called multilateration (MLAT) is used, but it requires at least 4 stations receiving the same Mode-S signal. ADS-B data does include the position, so one feeder is enough.

[unique veldt]

They need to be some distance apart

[stuck wigeon]

At what distance more or less?

[unique veldt]

Im not an expert but im thinking at least a few miles

[wind trellis]

I'm not an expert either, but intuitively I would think it would work best when there are receivers on all sides of the target. It's always an estimated position - the more receivers in different directions, the better the result should be

[stuck wigeon]

Ok and with the feeders apart from what you indicated before I guess there are better equipment and antennas than others, what would be the best I can acquire?

[unique veldt]

well what is your budget? and are you looking to set up a mlat system or just one feeder?

[stuck wigeon]

I have no budget as long as it works for me, I want it to detect as much as possible and to be the best it can

[wind trellis]

If you want to spend, I've heard good things about DPD antennas - https://dpdproductions.com/products/ads-b-vertical-outdoor-base-antenna. If you're in Europe, Vinnant make some good ones too https://vinnant.sk/store/page/1?productlist-search=&productlist-sort=created-desc&productlist-categories=1090mhz-ads-b&productlist-tags=&productlist-itemcount=20. Good quality coax is important too.

[unique veldt]

and are you setting up only 1 feeder or are you planning on a network, because if you want a bunch for mlat, you need multiple locations in your city or wherever you are

[stuck wigeon]

As I said, I don't know what I need, I want to detect the aircraft that pass through my private area, and when I use the web I only get 7/8 in all country.

[unique veldt]

if you feel comfortable, it would be nice to know what country/area you are talking about, and second, if you have multiple locations are your disposal, setting up a mlat network with lots of feeders would be your best bet, but I doubt most people have access to many different buildings in their area. In that case, setting up a powerful antenna feeder station at your house would be your best bet

[lapis jetty]

@stuck wigeon - did you actually try what was suggested?

[stuck wigeon]

I cant try now but try when arrive to muy home

[lapis jetty]

it'll work off whatever device you are using to post here regardless of where you are at the moment

[stuck wigeon]

Excuse me, I thought you were talking about the hardware not the web, of course I have used the web, the problem is that I do not detect all the airplanes, helicopters in my area

[lapis jetty]

Did you look at https://globe.adsbexchange.com/ to see if the all the aircraft in your area are showing?

[stuck wigeon]

I dont think you can see everything, there are medical and police aircraft that I can see in flight and the are not on the web, but i can see the planes that arrive or take off fron the airport. I have been told that it could be that the aircraft i indicate do not have ads-b but it is not so because i have confirmed that if they do, it is the HC135 and AS365 N3+

[wind trellis]

how did you confirm that they do? Note that whilst the aircraft may be equipped with an ADS-B transponder, it may or may not be enabled.

[stuck wigeon]

Yes, whether it is active or not is another matter, they may be carrying it.

[lapis jetty]

Can you confirm that they do not show on ADSBExchange?

[lapis jetty]

And if it is not active they will never show on any aircraft tracking site - how can they be tracked if they are not transmitting a signal?

[stuck wigeon]

Yes, i can confirm

[stuck wigeon]

I know they are there because I see them flying with my own eyes, and I check it on the web and they don't come out, and I know they have ads-b, maybe they don't have it activated but I don't know

[wind trellis]

I don't suppose you have any tail numbers?

[stuck wigeon]

You mean a plate number?

[wind trellis]

I mean the registration of the aircraft - e.g. in the US, it could be something like N123AA

[stuck wigeon]

Yes i have

[wind trellis]

if you can share them, we can look to see if they have been tracked anywhere ...

[lapis jetty]

@stuck wigeon Any luck with getting us the tail numbers?

[stuck wigeon]

Yes, i share but in private msg i don't like share tail number here

[lapis jetty]

Given that tail numbers can be read by anyone who sees the aircraft your logic seems a little flawed.

[stuck wigeon]

Logical and I understand what you are saying, the reason for not saying it publicly is because I don't want them to publicly know which tail numbers I am asking about

[unique veldt]

hmm the guy said that he got banned... any reason?

hold on he's just having trouble joining

ok he said he was banned