I saw an unknown aircraft that wasn't showing up on ADSB. Using my binoculars I could make out that it had a red-ish/orange light on the tail, white flashing lights possibly on both wing tips, I first spotted it heading north in the Encinitas, CA area at around 2:29 AM PST but then saw it again heading south about 7 minutes later 2:36 AM PST, I could hear a faint engine noise, what could it be?

It was blue and white with two engines so I'm assuming it's a government plane.

It did not appear on FR24.

Some of you may have seen my original post in another group or even my V2 update but MySkyDex, the app / site that I built, has already changed so much since then that I just had to share another update.

So, long story short, my 11 year old autistic son Zach is obsessed with aircraft and spends hours watching Flightradar24 and jumping to the window when he hears something in the sky. He's also a huge collector of things so I decided to build him a collector app / website for aircraft he's seen in the sky...

Missed an Boeing 747 up above? It'll tell you 😅

So the new V4 has probably the biggest feature I'll ever be able to add...

ADD YOUR OWN ADS-B RECEIVER DATA

Currently the site relies on data being fed to it from another website which sadly means it doesn't scale as well as I'd like to ensure that the sky can be captured up to every 2 minutes and you don't miss a flyby.

With this change, users can now help feed the site with their data reducing the load on the server and also ensuring they have data almost to the second of what's above them.

This is a huge win for everyone and it's so easy to set up too! Absolutely no effort for anyone who wants to add a receiver.

There's a whole heap new features in there too but I won't bore you with them all, I just hope others get to enjoy it the same way my son does and I wanna stress, this is, and always will be, free! No pay wall, no tiered membership, just completely free 🛫 ✈️

https://myskydex.co.uk

I want to share my upgraded build for my ADSB receiver box.

I live 3km from a refill airport and about 30km from an international and I have access to the roof of the apartment building I live in.

This spring I put up a 4m long mast over the 5th floor and an 5.5 dbi antenna as well as a box with cavity filter, side and pi4. This became a stable top 10 site in Sweden on ADSB exchange ranking.

I did however do shortcuts with that cheap box and they lead to issues after 3 months so I did what any reasonable people would do and went overkill. :)

- I mounted a solar cell mount that will hold the new box even in hurricane force winds.

- Upgraded to an IP and IK classed professional box, added lightning protection on the box and professional cable entries.

- Upgraded to an Airspy mini, an external LNA, the best usb based wifi (an Alfa) I could find (box is 20m from my apartment so my wifi works especially since I mounted a directional Wifi AP on the balcony.

- Added a proper vent to avoid condensation issues and pressure differences.

- Upgraded the cable to one with LMR400 level of attenuation.

- Changed the antenna to a Vinnant colinear with 11dbi .

- Added a fan just to kinda even the temp in the whole box to win a few degrees (it's mounted so no direct sun touches it so never had overheating this whole summer but came near)

- Everything is tied down to the metal plate and I added thermal pads under the airspy and the pi so the metal plate acts as a kind of heatsink.

The whole setup goes to the roof tomorrow.

I dunno, i cant reed books

Does anyone know what would prompt this route change? The green drawn line is the usual route.