![pipe sdrsharp in to wxtoimg pipe sdrsharp in to wxtoimg](https://okelectronic.files.wordpress.com/2014/08/2014-07-11_113953.jpg)
As such open the file and perform the following steps: Getting the Image Preparationsīefore working with the recording, a bit of prep work using Audacity is necessary. When the satellite comes into range, simply hit the record button. Check the Files and Recordings section below for references.
![pipe sdrsharp in to wxtoimg pipe sdrsharp in to wxtoimg](https://image.ibb.co/fmjB1F/wxtoimg_1.jpg)
They basically continiuously stream pictures back to earth using APT - Automatic Picture Transmission. They currently have three satellites in orbit which regularly pass over Europe: NOAA 15, NOAA 18, NOAA 19. It'll still work in any case, but has the effect that the contrast of the picture is somewhat clipped the narrower your receive bandwidth is.NOAA is the US National Oceanic and Atmospheric Administration. The APT signal has fairly wide FM modulation compared to most terrestrial voice FM, and even wideband mode won't be enough. A trick I've done in the past is just to record the output of the Baofeng on your phone's voice memo app and play it back later when you're back inside.įinally, it's worth noting that APT (the tech in this video) is somewhat deprecated, but if you have an SDR already, for somewhat more effort you can receive the digital equivalent Īlso, if you're using a Baofeng, set it to wideband FM in the menu. In fact, even the rubber duck on the Baofeng will kind of work if its a high elevation pass (70-90 degress) as the satellite is closer and has less atmospheric attenuation. any noise in the signal shows up at snow in the picture, and if your antenna isn't circularly polarized, the strength will fade in and out as the satellite moves over the horizon. The video shows this, but for reference, the three satellites transmitting APT pictures:Īs others have mentioned, you don't need a fancy antenna even a car magnetic mount 2-meter ham radio antenna will work to an extent the problem and fun part about this is it's wonderfully analong.
![pipe sdrsharp in to wxtoimg pipe sdrsharp in to wxtoimg](https://www.rtl-sdr.com/wp-content/uploads/2017/07/unitrunker_exagear.jpg)
If you want to live vicariously through others, various people publish live images of captures over their locations on In particular, being on the west coast I'm fond of watching Īlso, you don't need a USB SDR per se the Baofengs will work fine as its just an FM audio signal. In those days a ground station cost hundreds of thousands of dollars and were essentially (pre-commercial) faxes that printed on paper - our photos were higher quality We could also get world wide images from a geostationary satellite that gave us 12 images made by stitching everything together (and whiting out all the communist countries). The satellites in those days made low passes and essentially took line by line of image as they moved thru their orbits. We did sat tracking on the local uni's mainframe so we knew where in the sky and when a pass would start.
Pipe sdrsharp in to wxtoimg tv#
a camera in a dark room and an operator who would open the aperture and start taking a photo when the pass started and closed it when the beam hot the bottom of the TV someone with a homemade antenna pointing it at the sky, tracking manually by listening for the noise floor an FSK->analog to drive the spot amplitude as it swept across the TV horizontal sync detector that reset the horizontal beam on the TV and advanced the vertical
Pipe sdrsharp in to wxtoimg driver#
an old TV pulled apart so the tube could be driver directly When I was a kid (back in the 70s) we built hardware to do this - essentially it was: It definitely wasn't a political exaggeration that the NWS is under attack. Unlike the 2005 legislation cited in the article which fell flat on its face, this one looks to more systematically nerf the National Weather Service at taxpayer expense to the benefit of commercial interests. It's a resource that really isn't known outside of the aviation industry, but it's there and publicly available.ĮDIT: Fat-fingered the number for SFO rrected.ĮDIT^2: In the spirit of following cookie crumb trails, I did a quick search on for "national weather service" and found this particularly damning piece of legislation introduced in the Senate. When I'm driving to the office or on travel and want a snapshot of the current weather, I call ASOS for the relevant area and a bot on repeat tells me what conditions look like, e.g. I don't have a weather app installed on my phone specifically because NOAA doesn't publish one.now I know why.