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Fldigi (short for Fast light digital) [4] is a free and open-source program which allows an ordinary computer's sound card to be used as a simple two-way data modem.The software is mostly used by amateur radio operators who connect the microphone and headphone connections of an amateur radio SSB or FM transceiver to the computer's headphone and microphone connections, respectively.
Universal 2nd Factor (U2F) is an open standard that strengthens and simplifies two-factor authentication (2FA) using specialized Universal Serial Bus (USB), near-field communication (NFC), or Bluetooth Low Energy (BLE) devices based on similar security technology found in smart cards.
The type of radio emission is “F1D”, frequency-shift keying.A message contains a station's callsign, Maidenhead grid locator, and transmitter power in dBm. [3] The WSPR protocol compresses the information in the message into 50 bits (binary digits).
GitHub (/ ˈ ɡ ɪ t h ʌ b /) is a proprietary developer platform that allows developers to create, store, manage, and share their code. It uses Git to provide distributed version control and GitHub itself provides access control, bug tracking, software feature requests, task management, continuous integration, and wikis for every project. [8]
The command to create a local repo, git init, creates a branch named master. [61] [111] Often it is used as the integration branch for merging changes into. [112] Since the default upstream remote is named origin, [113] the default remote branch is origin/master. Some tools such as GitHub and GitLab create a default branch named main instead.
A mutual authentication process that exchanges user IDs may be implemented as follows: [citation needed] Alice sends a message encrypted with Bob's public key to Bob to show that Alice is a valid user. Bob verifies the message: Bob checks the format and timestamp. If either is incorrect or invalid, the session is aborted.
WSJT-X is a computer program used for weak-signal radio communication between amateur radio operators.The program was initially written by Joe Taylor, K1JT, but is now open source and is developed by a small team.
Thetis was the name of a floating radar decoy used by German U-boats during the Second World War. The device was stored dismantled in the bow compartment as a pole about two metres long. Assembly usually took place in the U-boat's conning tower, and could be assembled in about four minutes ( FuMT 2 - Thetis IIC ).