A subreddit for the low-cost, DIY software defined radio (SDR) community. While originally dedicated just to the project, relevant legal content related to general SDR, RF and similar projects is also welcomed. Feel free to ask questions but please. Pretty little liars season 1 english subtitles download.

Rtl-sdr 'rtl-sdr' is a generic term for cheap USB digital TV (DVB-T) receivers that use the Realtek RTL2832U chipset, which can function as general purpose software defined radios (receive only). All rtl-sdr compatible devices employ the RTL2832U as an ADC and USB controller, but different RF tuners may be used. Note that rtl-sdrs do not transmit! Typical specs (some depend on specific tuner): • Cost: ~$5-45 USD • Frequency range: 24 - >1760 MHz (100 KHz - 24 MHz in direct sampling mode) • Max sample rate: 3.2 MS/s (2.6 MS/s in practice) • Resolution: 8 bits/sample • Noise figure. Hi all, Last couple of days I have been playing with Inmarsat L-band stuff.

I can now confirm that I was receiving signal from satellite at 64 East (I thought it was sat at 24 E). This was result of very scientific 'antenna in a steel bucket' -procedure. I put the antenna into bottom of a bucket and by panning left and right certain signals were fading away when others came in stronger. The gain of bucket feed horn is same as cooking tin, but it's now more directional. And as result I can see, that there's only three Classic AERO channels on 23 East (nine at 64E) and pretty much none STD-C (marine info channel). But this is a good start. Next step would be helix antenna and LNA4ALL amplifier.

Inmarsat is a communications service provider with several geostationary satellites in orbit. They provide services such as satellite phone communications, broadband internet, and short text and data messaging services. Geostationary means that the satellites are in a fixed position in the sky and do not move. From almost any point on earth at least one Inmarsat satellite should be receivable. Inmarsat transmits in the L-band at around 1.5 GHz. With an RTL-SDR dongle, a cheap $10 modified GPS antenna OR 1-2 LNA’s and a patch or dish antenna you can listen to these Inmarsat signals, and in particular decode one channel known as STD-C NCS. This channel is mainly used by vessels at sea and contains Enhanced Group Call (EGC) messages which contain information such as search and rescue (SAR) and coast guard messages as well as news, weather and incident reports.

See the end of this post for a tutorial on modifying a GPS antenna for Inmarsat reception. Also as a small aside, you might want to use this tutorial to practice your L-band reception since are planning to begin their L-band broadcasts later this year, which may be possibly be broadcast from Inmarsat or equivalent satellites. These broadcasts will be at a nearby frequency and will contain about 10 megabytes of daily data. The RTL-SDR should also be able to receive these broadcasts if a compatible decoder is written. Some examples of the EGC messages you can receive on the STD-C NCS channel are shown below: Military Operations: Live Firing Warning STRATOS CSAT 4-AUG-2015 03:22 SECURITE FM: RCC NEW ZEALAND 040300 UTC AUG 15 COASTAL NAVIGATION WARNING 151/15 AREA COLVILLE, PLENTY CUVIER ISLAND (REPUNGA ISLAND), BAY OF PLENTY 1. LIVE FIRING 060300 UTC TO 060500 UTC AUG 15 IN DANGER AREA NZM204. ANNUAL NEW ZEALAND NOTICES TO MARINERS NUMBER 5 REFERS. CANCEL THIS MESSAGE 060600 UTC AUG 15 NNNN Armed Robbery / Pirate Warning NAVAREA XI WARNING NAVAREA XI 0571/15 SINGAPORE STRAIT.

I know that HOKA can decode the tdma info as well as inmarsat C. It's actually not a program, but rather it's a hardware and software system.

ARMED ROBBERY INFORMATION. 01-04.5N 103-41.8E. FIVE ROBBERS ARMED WITH LONG KNIVES IN A SMALL UNLIT HIGH SPEED BOAT APPROACHED A BULK CARRIER UNDERWAY. ONE OF THE ROBBERS ATTEMPTED TO BOARD THE SHIP USING A HOOK ATTACHED TO A ROPE. ALERT CREW NOTICED THE ROBBER AND RAISED THE ALARM AND CREW RUSHED TO THE LOCATION.