2 nd design update presentation march 17, 2009
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2nd Design Update Presentation
March 17, 2009
Overview
Ground Segment
Space Segment
OBC TNC Transceiver Antenna
PC TNC Transceiver Antenna
Rx
Tx
Rx
Tx
Rx
Tx
Rx
Tx
Narrowed Scope
• Need to connect Linuxstamp to TNC via RJ-11
• Current software not adequate upgrading to newer Program –ROC
• More channels needed in interface between the TNC and Transceiver
Space Segment
OBC TNC Transceiver AntennaRx
Tx
Rx
Tx
Status of Project
• Ground station able to receive and transmit data from computer
Status of Project
• Transceiver disassembly
• Pico Packet tested with the ground station computer
• Status of Components/systems
Received– TNC : PicoPacket
On Order– Ground station software
To Be Acquired– Cables
Modeling and AnalysisCurrent Usage (at 6V)
0mA
50mA
100mA
150mA
200mA
250mA
300mA
350mA
Transmitting Receiving Idle
Cu
rren
t TNC
Trans.
Total
Modeling and AnalysisVolume Usage
Communications components (19%)
Remaining volume (89%)
Prototypes
• Groundstation Prototype using handheld testing Antenna
• Space segment transceiver is the current prototype for point to point communication
Future Tasks
• Mounting components into Cubesat
• Further Groundstation testing using spectrum analyzer
• Writing AX.25 software for Cubesat
• Cubesat antenna construction
• Testing range, power, durability
BudgetCash
Item Cost Change since Feb.
Antenna assembly and deployment mechanism
$150.00
Yaesu VX-3R $239.00
PicoPacket TNC $320.00
Wires and other materials $36.00 +$16.00
Presentation Supplies $150.00
Subtotal $895.00 +$16
Week of
Sept
15
Sept
22
Sept
29
Oct
6
Oct
13
Oct
20
Nov
3
Nov
10
Nov
24
Dec
15
Jan
5
Jan
19
Jan
26
Feb
2
Feb
9
Feb
16
Feb
23
Mar
2
Mar
9
Ma
r
16
Mar
23
Mar
30
Apr
6
Apr
13
Apr
20
Apr
27
May
4
May
11
May
18
May
25
Tasks
Project Proposal
Contract Proposal
Ground Station
Assembly & testing
Basic radio operator's
qualification
Design Specification
review
Software development
begins
1st design update
presentation
Antenna design and
modeling
Preliminary design
review
Antenna fabrication
2nd design update
presentation
1st communication
link test
Critical Design review
Final design report
Questions?
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