The US government recommends that everyone have A group of disasters, which includes weather radio. These are these radio devices A network worldwide Run it National Oceanic and Attrads Administration (Noa) and Federal Communications Committee This provides alerts about dangerous weather and other major emergencies. These broadcasts can serve as a lifeline when other communication systems come out. But what if you can escalate it and not only get audio information, but also the photos, plans and reports, even during the network completely off the network?
It turns out that you can, thanks to modern geographic synchronous satellites, was not easier than that with the new Krakenrf Discovery dish system. This system includes the purchase of a $ 115 equivalent antenna of $ 70 ° C, then one of the $ 109 feed that covers different frequency ranges. To try the system, I got one suitable summary to capture it L-Band Satellite TransmissionsAnd another was seized to reveal Radio emissions from galaxy hydrogen clouds.
The equivalent antenna comes as three metal petals, in addition to some pieces and additional pieces of fodder and installation of the dish on support. Everything is held with nuts and nails, so that it can be dismantled and reassembled, light petals and accumulate together well – you can pack them in a bag if you want to travel and take samples from a different sky.
In addition to the Krakenrf dish and feeding, you will also need A specific radio reception (SDR) and a computer With programs to decode the signals coming from the summary. Many SDRS can be used, but you will need one to come with what is known as a T -shirt bias Integrated, or you will need to add a biasing point yourself. TEE BIAS provides the ability to lower noise used in Krakenrf extracts. I used 34 dollars recommended RTL-SDR Blog V3 (Which comes as a USB Dong), with my MacBook, but you can use a computer or Raspberry PI as a host computer as well.
The discovery dish is formed through three petals [top center] This broge with other installation equipment [top left and right]. Feed is installed on a column and modified to be flat with a dish concentration [bottom]. Various conclusions allow different applications, such as 1680 MHz to receive Latery Laters’ transfers or 1420MHz for wireless astronomy. Radio’s future signal signs show the programs.James Provest
After I entered the L-PAND feeding in the dish, it’s time to search for a satellite. After Krakenrf’s guide, I used Karl Rainman Web application To print a list of theses and heights of simultaneous geographical weather satellites on the basis of my location. Then I went to the roof of a residential building New York City with Mary from mobile pork radio antenna To provide a mountain. Then I went directly down when I realized that it was very exciting for a temporary mountain. The dish is perforated with holes to reduce air resistance, but there was still a real danger of winds that close the mobile mast and sweep on the side of the building.
Two days later, I returned to quieter conditions, and with the use of my iPhone as a tunnel compass and scale, I directed the dish to the coordinates of the satellite in the weather. This satellite hangs over the equator along the 75 -degree longitudinal line, near New York City. A second satellite, sitting in the West, at a temperature of 135 degrees west, over the Pacific Ocean.
These GOES satellites are the fourth generation of spacecraft in a long series of invaluable weather moons that are operated by Noaa and American national weather service to 50 years old. The first current generation, known as the name Goes-RIt was launched in 2016 and features a number of promotions. For radio lovers, the most important promotions are the lining of the descending link.
Satellite transmission current in which pictures are taken in multiple wavelengths and standards. Fully false image [above] It is captured in the infrared range that detects moisture and ash. The image is shown at the top of the east of the United States to bring what you see with the naked eye. Stephen Cass/Nawa
Goes-r satellite transmit data at an altitude of 400 kg per second, compared to 128 kb/s maximum for previous generations, allowing More information to be includedLike pictures of other weather satellites around the world. Satellite also integrates satellite data data, emergency information and weather in one link that can be captured at one time by one reception, instead of the need for two as before.
For accurate adjustments, I was instructed to see the signal in the integrated frequency spectrum analyst SATDOMPOpen software package designed to decode the satellite transfers that have been captured by SDR receptions. I groaned when I set the dish, I barely get a signal signal. But for my amazement, I started seeing a picture of the ground starting at the screen.
The original Goes-R design determines that receiving the floor dishes should be At least one meter In the country, but people in Krakenrf built their summaries around A very new speaker The weakest signal that the smaller plate collects can make usable. Soon I had pictures of the Earth with multiple wavelengths, whether it was a false flexibility, with or without the outlines that are overwhelmed by cases and countries, in addition to a wide range of other graphs that plan for rain and wind speeds in different regions.
GOES satellites also broadcast information from the US National Weather Service, such as the marine wind graph.Stephen Cass/National Weather Service
The following test was to do a spot of radio astronomy, and to switch L-pand nutrition to feed galaxy hydrogen emissions. Getting the results was a much longer process: First, I had to direct the dish in a little sky, where I knew the Milky Way.Not To obtain the baseline data (done with help Stellarium astronomy site). Then I directed the dish directly up and waited for the ground to bring the milky road. The removal from the noise sign is a slow process – you must merge 5 minutes of data from the recipient – but in the end a gentle curve was formed indicated that I am still safely embracing spiral weapons in our home galaxy. Radio astronomy is much more sophisticated He can Clean, especially if you install the dish on the survey platform to create two -dimensional maps. But I just switched to the L-PAND feed to be amazed at what our planet looks at 36,000 km!
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