BBC: 'Pocket spacecrafts' to become a reality

BBC Radio 4 Today show has featured an item on the recently launched 437 MHz Sprite satellites and the new Pocket Spacecraft being developed by a UK radio amateur

The tiny Sprite satellites, measuring 3x3cm and just a few millimetres thick, contain a 437 MHz transmitter, solar cell, sensor and antenna.

The CubeSat KickSat-1 carrying 104 Sprites was successfully launched on April 18, however, a suspected radiation glitch meant they could not be deployed before the CubeSat burnt up on re-entry on 14 May 2014.

UK radio amateur Michael Johnson M0MJJ has developed Pocket Spacecraft known as ‘Scouts’. A ‘Scout’ is a wafer thin disk with flexible electronics, smaller than a CD, containing a transceiver, antenna and solar cells. It is hoped to carry them in a CubeSat which would deploy them in Lunar orbit. It is understood that frequencies in the 435 MHz and 2400 MHz bands may be used.

Listen to the BBC Radio 4 clip ‘Pocket spacecrafts’ to become a reality in which BBC Click’s Spencer Kelly discusses the development of pocket spacecrafts - http://www.bbc.co.uk/programmes/p01z4q22

KickSat-1 launch - http://amsat-uk.org/2014/04/18/successful-launch-of-kicksat-carrying-104-sprite-satellites/

British Interplanetary Society: Sprite Technical Summary - http://www.bis-space.com/2013/03/09/9301/kicksat-technical-summary

UK radio amateur plans Lunar Pocket Spacecraft - http://amsat-uk.org/2013/08/26/uk-radio-hams-lunar-cubesat-to-go-ahead/

Pocket Spacecraft - http://pocketspacecraft.com/

New Ham Radio Digital Mode

The ROS software FHSS Mode is a new HF digital mode based on FHSS-CDMA modulation

It uses 16 different CDMA codes with 1.8 seconds per Hop.

Every transmission uses a different CDMA code randomly chosen.

More information - http://rosmodem.wordpress.com/2014/05/16/new-digital-mode-fhss-mode/

ROS Weak Signal Radio Chat and Opera Weak signal QRSS Beacon can be downloaded from http://rosmodem.wordpress.com/

Introducing SmartMic Ham Radio Digital Voice

David Rowe VK5DGR and Rick Barnich KA8BMA have been working on SmartMic, an embedded hardware product that allows you to run FreeDV without a PC. Just plug it into your SSB or FM radio, and you now have Digital Voice (DV)

The whole design is open hardware (TAPR license). It will run an embedded version of FreeDV which is also 100% open source.

Based on a STM32F4 micro-controller, SmartMic has a built in microphone, speaker amplifier, and transformer isolated interfaces to your radio. It’s just 80 x 100mm, and can be held in you hand and used like a regular PTT microphone, or sit near your radio in a small box form factor. SmartMic will be in production later in 2014 and will retail for US$195.

Read about SmartMic - http://www.rowetel.com/blog/?p=3125

Codec 2 - http://www.rowetel.com/blog/?page_id=452

FreeDV: Digital Voice for HF - http://freedv.org/tiki-index.php

Join the FreeDV Codec2 email list - https://lists.sourceforge.net/lists/listinfo/freetel-codec2