Coms Work Package Breakdown

The Work Package Breakdown (WPB) is a way of splitting up a massive job (building a satellite) into small pieces so that nothing is missed out and work can be done in a logical order. It is also useful for monitoring where teams have got to. The satellite itself breaks down into many subsystems: Attitude Determination and Control Systems; Communications; On Board Data Handling; Payload; PSU; Structure and Environment. The Subsystems then break down further into individual chunks of work. The Communications Subsystem breaks down into the parts listed below.

Current Work Package Breakdown Accurate as of 07/01/2010

Budgets - VERY ROUGH

Mass, Volume, Cost and Power Budgets

Mass
Transceiver 102g (but this includes the antenna and battery which will be removed)
TNC Unknown
Antenna 5-10g (+ deployment mechanisms currently unknown)
Beacon ~30g (All values for the beacon are based on the design J Heath has suggested)

Volume
Transceiver 56(W) x 96(H) x 14.5(D) mm (before the case is shortened)
TNC test board is ~80 x 40 x 15 mm (device may be smaller)
Antenna about 500 x 5 x 0.5 mm (will be wrapped around the satellite for launch)
Beacon Unknown (maybe 40 x 40 x 10)

Cost
Transceiver ~£150
TNC Unknown (other cubesats with similar spec ~£200 – 600)
Antenna <£20
Beacon require soldering (components <£20)

Power
Transceiver 1.184 W (when transmitting@ maximum power)
TNC 0.02838 W when in use
Antenna 0
Beacon ~80mW (when in use)

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