About SSTV FAX WX Software The resource is currently listed in dxzone.com in 3 categories. The main category is Weather fax software that is about Wefax programs for weather fax decoding. This link is listed in our web site directory since Friday Nov 20 1998, and till today 'SSTV FAX WX Software' has been followed for a total of 39654 times. So far received 52 votes for a total score of 6.10/10 You may find other interesting sites similar to this one, under the following categories:. Ham radio software collections. SSTV software for ham radio SSTV emission.
Wefax programs for weather fax decoding.
Jump to:, Radiofax, also known as weatherfax and HF fax (due to its common use in the short waves), is an analogue mode for transmitting images in grayscale. It is also related to slow-scan television. The term weatherfax was coined after the technology that allows the transmission and reception of weather charts (surface analysis, forecasts, and others) from a transmission site (usually the meteorological office) to a remote site (where the actual users are). Facsmile machines were used in the 1950's to transmit weather charts across the United States via land-lines first and then internationally via HF radio. Radio transmission of weather charts provides great flexibility to marine and aviation users, for they now have the latest weather information and forecasts at their disposal to use in the planning of voyages. Radiofax relies on facsimile technology, where printed information is scanned line by line and encoded into an electrical signal which can then be transmitted over land-line or via radio waves to great distances. Since the amount of information transmitted per unit time is directly proportional to the bandwidth available, the speed at which a weather chart can be transmitted varies depending on the quality of the media used for transmission.
Today radiofax charts and images are available via FTP or HTTP downloads from sites in the Internet, such as the ones hosted by the National Oceanic and Atmospheric Administration (NOAA). Radiofax transmissions are also broadcast by from multiple sites in the USA at regular daily schedules. Wondershare mobilego keygen generator. Radio weatherfax transmissions are particularly useful to shipping, where there are limited facilities for accessing the Internet.
The German Meteorological Service (DWD) is another major producer of FAX charts, which are also transmitted on HF frequecies from a location near Kiel. Contents. Transmission details Radiofax is transmitted in and uses. The signal shifts up or down a given amount to designate white or black pixels. A less than that for a white or black pixel is taken to be a shade of grey.
With correct tuning (1.9kHz below the carrier frequency for USB, above for LSB), the signal shares some characteristics with, with black at 1500Hz and peak white at 2300Hz. The official radio emission designation is F1C. Usually, 120 lines per minute (LPM) are sent (For monochrome fax, possible values are: 60, 90, 100, 120, 180, 240. For colour fax, LPM can be: 120, 240).
1 A value known as the index of cooperation (IOC) must also be known to decode a radio fax transmission - this governs the image resolution, and derives from early radio fax machines which used drum readers, and is the product of the total line length and the number of lines per unit length (known sometimes as the factor of cooperation), divided by π (3.1416). Usually the IOC is 576. Automatic Picture Transmission format (APT) APT format permits unattended monitoring of services. It is employed by most terrestrial weather facsimile stations as well as geostationary weather satellites. The start tone triggers the receiving system. It was originally meant to allow enough time for the drum of mechanical systems to get up to speed. It consists of rapid modulation of the video carrier, resulting in a characteristic rasp-like sound.
The phasing signal, consisting of a periodic pulse, synchronises the receiver so that the image will be centered on the paper. The stop tone, optionally followed by black, marks the end of the transmission. Signal Duration IOC576 IOC288 Remarks Start tone 5s 300Hz 675Hz 200Hz for colour fax modes. Phasing signal 30s White line interrupted by a black pulse. Image Variable 1200 lines 600 lines At 120 lpm.
Stop tone 5s 450Hz 450Hz Black 10s Stations Today, radiofax is primarily used worldwide for the dissemination of weather charts, satellite weather images, and forecasts to ships at sea. The oceans are covered by coastal stations in various countries.
In the United States, fax weather products are prepared by a number of offices, branches, and agencies within the National Weather Service (NWS) of the National Oceanic and Atmospheric Administration (NOAA). Tropical and hurricane products come from the Tropical Analysis and Forecast Branch, part of the Tropical Prediction Center/National Hurricane Center.
Program za dobijanje kilograma. Trbuh se lagano smanjio, ali htio bih da u to ukljucim pravilnu prehranu da sto vise poboljsam rezultate. Sada, molio bih nekoga ako je dovoljno ljubazan da mi napise program (po mogucnosti sto detaljniji) prehrane. Bit cu jako zahvalan i javljat cu se sa rezultatima! Ili da me uputi ako takav detaljan program vec ima negdje na forumu!
They are broadcast over US Coast Guard communication stations NMG, in New Orleans, LA, and NMC, the Pacific master station on Point Reyes, CA. After Hurricane Katrina damaged NMG, the Boston Coast Guard station NMF added a limited schedule of tropical warning charts.
NMG is back at full capability, but NMF continues to broadcast these. All other products come from the Ocean Prediction Center (OPC) of the National Weather Service (NWS), in cooperation with several other offices depending on the region and nature of information. These also use NMG, NMC, and NMF, plus Coast Guard station NOJ in Kodiak, Alaska, and Department of Defense station KVM70 in Hawaii. Ever since the dramatized the dangers of icebergs in the North Atlantic, an International Ice Patrol has also originated weather data. Its charts are broadcast by the Boston Coast Guard station during the prime iceberg season of February through September, using the callsign NIK. A major producer of Canadian radiofax is the Canadian Forces METOC (Meteorology and Oceanography Centre) in Halifax, NS, using the communication station CFH. Charts are sent on the hour, then the station switches to (RTTY) for the rest of the period.
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In Europe the most commonly received weather FAX service is the, which transmits from Offenbach throught the day. The DWD frequencies and callsigns are: 4 Callsign Frequency Power DDH3 3855.0 kHz 10 kW DDK3 7880.0 kHz 20 kW DDK6 13882.5 kHz 20 kW CBV, Playa Ancha Radio in Valparaiso, Chile broadcasts a daily schedule of Armada de Chile weather fax for the southeastern Pacific, all the way to the Antarctic. Also in the Pacific, Japan has two stations, as does the Bureau of Meteorology in Australia.
Most European countries have stations, as does Russia. Is the only remaining news agency to transmit news via radiofax.
It broadcasts complete newspapers in Japanese and English, often at 60 lines per minute instead of the more normal 120 because of the greater complexity of written Japanese. A full day's news takes hours to transmit. Kyodo has a dedicated transmission to Pacific fishing fleets from Kagoshima Prefectural Fishery Radio, and a relay from 9VF, possibly still in Singapore. The frequencies formerly used by JJC radio outside Tokyo are now sent from an unknown location, using the same identification in Japanese as 9VF. They are still active and heard daily in 2010. The Joint Operational Meteorology & Oceanography Centre, Nortwood, UK (callsign GYA) transmits various weather charts for the the Royal Navy on 2618.5, 4610.0, 6834.0, 8040.0, 11086.5, 12390.0 and 18261.0 kHz. The charts cover North Atlantic, Europe and the Persian Gulf areas.
We have looked at the free MultiPSK software before on this website when we showed how to use it to decode amateur SSTV pictures but with so many modes available on the program it can be used for so much more. Having not looked at weather fax for a while and a little bored with RTTY and SSTV (if such a thing is possible) we thought it might be time to have a go at getting some nice HF fax pictures.
My City Scanner Frequencies
![Ware Weather Fax Frequencies Ware Weather Fax Frequencies](/uploads/1/2/3/8/123802761/573388447.jpg)
![City City](/uploads/1/2/3/8/123802761/587485243.jpg)
No special interface is needed to decode fax provided you can wire the radio into the line in or mic socket on your computer although some sort of could stop stray noise from the PC interfering with your shortwave receiver. Multipsk in Action Showing a Healthy Looking Fax Decode Finding HF Fax Transmissions Unlike decoding amateur radio digital signals which have to be hunted down throughout the various frequency allocations across the HF spectrum Fax signals have set frequencies and times. This makes it much easier and you’d be very unlucky not to find something worth listening to when you take into account the large amount of transmissions available. For maximum coverage these signals are also backed up be a huge amount of power making the level of equipment to receive them effectively low and inexpensive provided your radio can receive sideband radio transmissions.
Starting down on 4.610 MHz we original found a signal that was just worth decoding but that annoying HF signal fading was making a mess of the fax picture. Hunting for something a little more stable we moved up to 8.040 MHz where the signal from Nortwood in the UK was coming in strong with almost zero fade. For more info on where to listen to fax transmissions have a wealth of information at their website. How to use MulitPSK for Fax Start up MultiPSK and after closing the configuration window select the Fax mode in the panel in the top left of the screen. This will bring up a display window where your decoded signals are going to be displayed and the classic waterfall feature above to help with fine tuning the signal.
Fax is very slow at giving a complete picture but this can be used to our advantage by being able to slowly tune the shortwave radio to give best results. With every radio being slightly different and the offset needed to get a good signal when using a sideband mode you’ll have to move either side of the stated fax station frequency until the contrast between black/white on the fax picture is at its best.
The Finished Decoded Fax Picture Volume also plays a big part in the stability of the finished fax picture and even though its tempting at first to turn the audio from the shortwave radio up as high as possible this usually only results in distortion creeping into the decoding process. Start with the audio low then work your way up to what you can see is the optimum sound volume for your setup. Is an interesting free program that can take a little time to learn but with the amount of data modes it can be used for, it is in our opinion time well spent.