Most likely that's just variation in the amount of traffic (less traffic at night).See last 6 hours.
I don't know, but was referred to in some security related newsletter. Just wondering if the data off ADS-B can ever tell if an aircraft is following a legit ILS directive/signal sort of like a pre-curosr alert. If the Mode S protocol is further amended to include some more information. Just thinking aloud.Its nothing to do with ADS, its all about ILS. Nothing new, just another paper just for the sake of publishing a paper.
Some automated data monitoring of ADS that could produce a course deviation warning might be feasible, but few transport aircraft rely solely on ILS these days anyway. Unfortunately as there are more and more universities being built, and more and more people having to publish papers to get 'qualifications', we'll see more and more papers of this sort.I don't know, but was referred to in some security related newsletter. Just wondering if the data off ADS-B can ever tell if an aircraft is following a legit ILS directive/signal sort of like a pre-curosr alert. If the Mode S protocol is further amended to include some more information. Just thinking aloud.
You would have to make those changes yourself i'm quite fine with the graphs as they are.Is it possible for Graphs1090 to also plot at 3hrs and the 12hr mark?
sudo /usr/share/graphs1090/graphs1090.sh 12h
Ah, I didn't understand that part. I did access the files via those URLs, but obviously the timespan would not record everything. I'll work in sometime.I wrote that you need to access the files via their specific URL.
If you want buttons and stuff you need to change the files in /usr/share/graphs1090/html
It was too cheap as well. But worth trying when return is guaranteed.If the core isn't copper then the likelihood of the coax being bad quality is high i'd say.
The Satellite Amplifier (950 - 2050MHz version) has not yet arrived in mail. However, if I want to use this LNA (https://www.aliexpress.com/item/1-3000MHz-2-4GHz-20dB-LNA-RF-Broadband-Low-Noise-Amplifier-Module-UHF-HF-VHF/32952717426.html) which works on 12V and is NOT coax powered, what is the best way to take the power from the coax to power the LNA and feed the other side? This LNA boasts of a 18db gain at 1090MHz.The Satellite amplifier (950 ~2050 Mhz) does need a bias-t and a12v~15v dc power supply.
Setup of Satellite amplifier and bias-t
What about https://www.aliexpress.com/item/0-1-2000MHz-2GHz-RF-Wideband-Low-Noise-Amplifier-LNA-Broadband-Module-Gain-30dB/32972147890.htmlThis amplifier is too much wide band and pick FM, TV, Mobile phone signals, overloading the dvb-t front end and consequent poor reception.
About power insertr, please see this diagram. Both power inserters are identical (each has one capacitor and one inductor, and their values are same in both). The one used as dc blocker does not need an inductor, only a capacitor. Since these in diagram are factory made as injector they both have a capacitor and an inductor.
View attachment 2858
A Bandpass filter got delivered few days ago. I plan to connect this straight to the antenna.I'm sure aliexpress has some 1090 MHz SAW filters you can buy.
Maybe even use 2 in series (after the LNA)
Might still overload the LNA if you're unlucky but hopefully not.
Without good filtering the LNAs won't help too much with reception.
Yep, the extraction is what I am slightly in doubt about.To transfer the power you will need two bias-t devices, one to insert the power and another one to extract it.
Speaking in DC terms:Yep, the extraction is what I am slightly in doubt about.
Aliexpress prices are close to USD 40 each. But the basic filter is inexpensive. Have asked seller to share more detailed pictures.you'll need a SAW filter on a board with connectors.
Great, so that is clarified.Speaking in DC terms:
The bias-t just connects one side of the coax with the output on the side.
So it doesn't matter which way you use it.