Vazduhoplovi

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HKS
Postovi: 10417
Pridružio se: 14 Jan 2013, 17:31
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Re: Vazduhoplovi

Post od HKS » 23 Apr 2020, 18:21

Da, al kod flight radar su neki amaterski radari. Mada vidim sad da ovdje ne prate neke avione koje flightradar prati. Mnogo manje aviona ima.
A prate neke koji flightradar ne prati, kao ove gore C130 sto sam naveo.

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snork
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Re: Vazduhoplovi

Post od snork » 23 Apr 2020, 23:54

Definitivno ne koriste iste izvore, pa koga zanima, najbolje da pratii i jedan i drugi. Ponekad imaju isti avion sa manje ili više detaljnim podacima. Pre neko veče kad sam pitao za onaj B747-200F, a Geza dao link, na FR24 nije bilo nikakvih detaljnih podataka, dok su Rusi (kao što sam poslao) imali registraciju, link na sliku, kao i godinu proizvodnje. :)

Imaju gomilu tih vojnih aviona po Bliskom istoku kojih nema na FR24. Ali s druge strane, juče je npr. leteo C-130 iz Sarajeva u Uroševac koji nisu imali, ali ga je bilo na FR24, doduše bez detaljnih podataka.
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Ralee
Postovi: 3062
Pridružio se: 13 Jan 2015, 22:09

Re: Vazduhoplovi

Post od Ralee » 25 Apr 2020, 00:40

Da li neko od vas sto prate, zna sta je danas oko 4 sletelo na aerodrom Nikola Tesla?

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nidza
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Re: Vazduhoplovi

Post od nidza » 25 Apr 2020, 00:43

C17 Globemaster iz UAE.

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Ralee
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Re: Vazduhoplovi

Post od Ralee » 25 Apr 2020, 00:47

I učinilo mi se da je nešto vojno. Koliko je to čudo ogromno bilo na prilazu, nikad tako nešto nisam video.

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Heineken
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Re: Vazduhoplovi

Post od Heineken » 25 Apr 2020, 01:32

Dosao po dzebanu verovatno

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dragan
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Re: Vazduhoplovi

Post od dragan » 25 Apr 2020, 06:58

Evo ti ga juce pored Etihadovog B777-300.
Jeste malo dalje ali I dok je prolazio nije izgledati veci, samo je prase debelo u trupu I tamne je boje pa na nebu izgleda vece.Slika

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Heineken
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Re: Vazduhoplovi

Post od Heineken » 25 Apr 2020, 12:15


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HKS
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Re: Vazduhoplovi

Post od HKS » 25 Apr 2020, 13:37


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Geza
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Re: Vazduhoplovi

Post od Geza » 25 Apr 2020, 20:48

Najgore je svađati se sa budalom. Prvo te spusti na svoj nivo, a onda te dotuče iskustvom...
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snork
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Re: Vazduhoplovi

Post od snork » 27 Apr 2020, 08:03

Zanimljiva trasa: Tuzla-Tbilisi. :) Pretragom po reg. broju našao sam da je ovaj An-12 proizveden u aprilu 1963. godine. Davna prošlost... vrhunac Hladnog rata, Hruščov i Kenedi bili na vlasti (ovaj drugi do jeseni iste godine :mrgreen: ).

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Zanimljivo da ga nema na http://planeradar.ru
Slabo Rusi pokrivaju Balkan...
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zuzazu
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Re: Vazduhoplovi

Post od zuzazu » 27 Apr 2020, 11:10

Ne secam se da li je pominjano, ali je na sajtu FR24 objasnjeno kako rade:

1) ADS-B
How ADS-B works
The primary technology that Flightradar24 use to receive flight information is called automatic dependent surveillance-broadcast (ADS-B). The ADS-B technology itself is best explained by the image to the right.

Aircraft gets its location from a GPS navigation source (satellite)
The ADS-B transponder on aircraft transmits signal containing the location (and much more)
ADS-B signal is picked up by a receiver connected to Flightradar24.

ADS-B is a relatively new technology under development, which means that today it's rarely used by Air Traffic Control (ATC). Our estimations show that roughly 70% of all commercial passenger aircraft (80% in Europe, 60% in the US) are equipped with an ADS-B transponder. For general aviation this number is probably below 20%. The percentage of aircraft equipped with ADS-B receivers is steadily increasing though, as they will become mandatory for most aircraft around the world by 2020. When mandatory, ADS-B will replace primary radar as the primary surveillance method used by ATC.

Flightradar24 has a network of more than 20,000 ADS-B receivers around the world that receive flight information from aircraft with ADS-B transponders and send this information to our servers. Due to the high frequency used (1090 MHz) the coverage from each receiver is limited to about 250-450 km (150-250 miles) in all directions depending on location. The farther away from the receiver an aircraft is flying, the higher it must fly to be covered by the receiver. The distance limit makes it very difficult to get ADS-B coverage over oceans.

On cruising altitude (above 30,000 feet) Flightradar24 covers 100% of Europe and of the USA. There is also good ADS-B coverage in Canada, Mexico, Caribbean, Venezuela, Colombia, Ecuador, Peru, Brazil, South Africa, Russia, Middle East, Pakistan, India, China, Taiwan, Japan, Thailand, Malaysia, Indonesia, Australia and New Zealand. In other parts of the world the ADS-B coverage varies. We are continually adding coverage all over the world via our FR24-receivers.

2) MLAT
In some regions with coverage from several FR24-receivers we also calculate positions of non-ADS-B equipped aircraft with the help of Multilateration (MLAT), by using a method known as Time Difference of Arrival (TDOA). By measuring the time it takes to receive the signal from aircraft with an older ModeS-transponder, it's possible to calculate the position of these aircraft. Four FR24-receivers or more, receiving signals from the same aircraft, are needed to make MLAT work. MLAT coverage can only be achieved above about 3,000-10,000 feet as the probability that four or more receivers can receive the transponder signal increases with increased altitude.

Most parts of Europe and North America are today covered with MLAT above about 3,000-10,000 feet. There is also some MLAT coverage in Mexico, Brazil, South Africa, India, China, Japan, Taiwan, Thailand, Malaysia, Indonesia, Australia and New Zealand.

3) Satellite
Satellite-based flight tracking is the latest step in our quest for global ADS-B coverage. Satellites equipped with ADS-B receivers collect data from aircraft outside our terrestrial ADS-B network’s coverage area and send that data to the Flightradar24 network. Satellite-based ADS-B data available on Flightradar24 comes from multiple providers. As the number of satellites supplying data and their location are dynamic, satellite coverage varies. Generally, satellite-based ADS-B increases coverage of flights over the ocean where ground-based reception is not possible. Only aircraft equipped with an ADS-B transponder may be tracked via satellite.


Konacno:

Aircraft visible on Flightradar24 (within ADS-B coverage)
When ADS-B was initially launched, it was primarily used in commercial passenger aircraft with 100+ passengers. An increasing number of aircraft including smaller aircraft types, are getting ADS-B transponders but, until ADS-B becomes mandatory it's up to the aircraft producer and owner to decide if an ADS-B transponder should be installed or not.

Common aircraft models that usually have an ADS-B transponder and are visible on Flightradar24 (within ADS-B coverage):

All Airbus models (A300, A310, A318, A319, A320, A321, A330, A340, A350, A380)
Antonov An-148 and An-158
ATR 72-600 (most new deliveries)
BAe ATP
BAe Avro RJ70, RJ85, RJ100
Boeing 737, 747, 757, 767, 777, 787
Bombardier CRJ-900 (most new deliveries)
Bombardier CS100 and CS300
Embraer E190 (most new deliveries)
Fokker 70 and 100
McDonnell Douglas DC-10 and MD-11
Sukhoi SuperJet 100
Some newer Ilyushin and Tupolev (for example Il-96 and TU-204)
Common aircraft models that usually do not have an ADS-B transponder and are not visible on Flightradar24 (within ADS-B coverage):

Antonov An-124 and An-225
ATR 42, 72 (except most new deliveries of ATR 72-600)
Boeing 707, 717, 727, 737-200, 747-100, 747-200, 747SP
BAe Jetstream 31 and 32
All Bombardier CRJ models (except most new deliveries of CRJ-900)
All Bombardier Dash models
All CASA models
All Dornier models
All Embraer models (except most new deliveries of Embraer E190)
De Havilland Canada DHC-6 Twin Otter
Fokker 50
McDonnell Douglas DC-9, MD-8x, MD-90
Saab 340 and 2000
Most helicopters
Most older aircraft
Most business jets
Most military aircraft
Most propeller aircraft
Of course there are lots of exceptions from these rules. There are some older A300, A310, A320, B737, B747, B757, B767, MD10, MD11 aircraft flying without an ADS-B transponder, which make those aircraft invisible on Flightradar24 when in areas with ADS-B coverage only.

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HKS
Postovi: 10417
Pridružio se: 14 Jan 2013, 17:31
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Re: Vazduhoplovi

Post od HKS » 27 Apr 2020, 12:01

A plane radar ru? :D

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snork
Postovi: 4379
Pridružio se: 13 Jan 2012, 07:50
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Re: Vazduhoplovi

Post od snork » 27 Apr 2020, 13:01

Rusi koriste ove kratkotalasne over-the-horizon radare visine 150 m i snage 10 MW:

https://en.wikipedia.org/wiki/Duga_radar

šalim se :D
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Geza
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Re: Vazduhoplovi

Post od Geza » 27 Apr 2020, 21:46

Najgore je svađati se sa budalom. Prvo te spusti na svoj nivo, a onda te dotuče iskustvom...
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