The first time we traveled internationally with our kids (a 5-year-old and nearly-2-year-old twins), my wife and I assumed the kids wouldn't really care, but we'd go anyway because we didn't want to give up international travel for a few decades just because we have kids. "DroneAid: A Symbol Language and ML model for indicating needs to drones, planes" (2020)Įven if my kids forget them all, I won't. > for drone simulation, cfd and helicopters ] "Show HN: I wrote a multicopter simulation library in Python" (2023) > TIL about Raspberry-NOAA and pywws in researching and summarizing for a comment on "Nrsc5: Receive NRSC-5 digital radio stations using an RTL-SDR dongle" (2023) They let you power next-generation, immersive 3D visualization experiences to įrom "GraphCast: AI model for weather forecasting" (2023) They offer high-resolution 3D maps in many of the world's populated areas. > Photorealistic 3D Tiles are a 3D mesh textured with high resolution imagery. "Google Earth 3D Models Now Available as Open Standard (GlTF)" (2023) land, buildings: There are several data feeders, which aren't in synch and contradict each other. There is no info where exactly a plane touched or left ground. There is no information on pitch or bank angle, or on gear or flaps positions. Heading and speed is point-in-time info but not a reliable vector to the next position. > I spent an awful lot of time dealing with the inaccuracies of the data sources, see. > LiveTraffic is a plugin for the flight simulator X-Plane to show real-life traffic, based on publicly available live flight data, as additional planes within X-Plane. If an operator's sole source of navigational chart information is contained on an EFB, the operator must demonstrate the EFB will continue to operate throughout a decompression event, and thereafter, regardless of altitude.) For large and turbine aircraft, FAR 91.503 requires the presence of navigational charts on the airplane. Til about FlyPadOS3 EFB: An EFB is intended primarily for cockpit/flightdeck or cabin use. > FSLTL is a free standalone real-time online traffic overhaul and VATSIM model-matching solution for MSFS. MSFS (MS Flight Simulator) has real-time Flight and Weather data and works in Steam's Proton fork of WINE on Linux.įWICS there are third-party open source tools for adding live Flight data and logical behaviors to flight simulator applications. the radar operator may just interpret the little ghost blips as noise, especially if he or she is overwhelmed by a large number of targets. One consequence of the above is related to early attempts at designing stealth airplanes, like the SR-71 and XB-70: The beam current is set such that the radar tube tends to build up the "blip" over multiple sweeps, and the blip usually moves less than its own diameter between sweeps.īut, if the airplane has an intrinsically low radar cross-section and if it is moving so fast that the blimp moves a greater distance between sweeps. Just to expand on one point the other two replies touched on: The beam does indeed scan radially outward from the center (though the angle can either be produced by physically rotating the deflection plates, or computing sin/cos electronically and applying to the x/y plates), and the amplitude of the returned signal does directly drive the beam current (so a target with a larger return will appear brighter.Īdditionally, there's also a storage tube effect going on, too-but it works like the variable-persistence mode found in certain oscilloscopes, not the bi-stable mode found in storage-tube x-y vector displays for early computers (some o'scopes had both var persist and bi-stable modes). Newer versions were able to use simple electronics to scan in the X and Y direction independently, to avoid the more complex rotating beam emitter assembly. Displays like this were used for decades, probably well into the 1980s or even early 1990s. The fixed radial and distance lines would be printed either on the CRT tube itself or on a transparent cover. This rotation would have to match the speed and direction of the radar dish at all times, otherwise the blips would show in the wrong place. The interesting part is to make the radar beam scan around the CRT display, the whole cathode tube emitter assembly would be driven by a motor synchronized with the spinning radar dish. So a stronger returned signal would cause a more visible "blip" on the long-phosphor display. The beam intensity signal was directly the (amplified) radar return signal. The timing of the scan was predefined to scale for distance. The original radar displays would scan from the center outward along a radial. But possibly not quite in the way you're thinking.
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