1. Tip-Mass Design Layout
COMM
802.11b
Main Satellite
Flight Computer
5 V
Muti-Plex
RS-232
Trigger
Power
Serial Camera
5 V
Deploy Sensor

2. Communication system Main sat module Tip Mass Standard WIFI LAN card
Processor with a PCMCI slot for WIFI card
Digital camera
wifi card
air interface
Wiser 2400 unit (OTC wireless)
RS-232 serial interface port of WISER 2400
Serial RS232 port of camera
interface port of WISER 2400
Main sat module
Tip Mass
Standard WIFI LAN card
Wiser 2400 is the interface between the wireless link and the RS serial link with the camera

3. Features and Specifications-WISER 2400
Operates In the ISM band (2.4GHz – 2.495GHz), no FCC license required
No driver on the host device is required for radio operation
Radio operation is independent of the operating system on the host equipment or device as long as a RS232 port is properly supported
Industry standard IEEE b-compliant wireless interface; Interoperable Client radios from other vendors ( in our case a Wireless LAN card)
Plug and play device; Once configured using a utility software, the configuration settings and other information is stored in non-volatile memory.
Specs
Frequency: ISM band (2.4GHz – 2.495GHz)
Link Distance: ~1200 ft in open space
Voltage, current: 5v, max 480mA (in transmit mode)
Data rate: Capable of supporting up to 115K baud (possible limitation on the digital camera side to transmit data)
Weight : 3.7ounces:the radio with case,1.7 ounces is the weight of the case
Antenna type: Integrated dipole antenna (omnidirectional) with ~2dBi gain

4. Link Budget Friss Fromula (Free space loss)
Lp(dB)= 92, log10 F+20 LOG10d 
For 100m L= 80dB at 2.45GHz

5. Power Drain
Beacons transmitted every 100ms by AP (Infrastructure mode)
Effective time of transmission of beacon frames ~ 3.8sec per hour
Possible circuitry to cut off power at times of ‘No use’