1. Systems Engineering
Bob Goeke
27 June 2005
System Engineering

2. System Block Diagram
27 June 2005
System Engineering

3. Configuration Management and Peer Review Process
Process documented in Rev A
We maintain reference, Bookmark, and Controlled documentation
Reference: GSFC project documents, vendor data sheets
Bookmark: what most folks call DRAFT
Controlled: must go through Configuration Management Board
All revisions of all documentation are maintained on public web site
Peer reviews are an incremental process run in parallel with the ECO process
Peer review validate the proposed initial or changed design
ECO process controls the documentation
Review board meets in public every Wednesday
27 June 2005
System Engineering

4. ICD Status Data ICD At Rev. B awaiting GSFC Sign-off
Electrical ICD Draft returned to GSFC with comments
Mechanical ICD Draft 2 returned to GSFC with comments
Thermal ICD Draft returned to GSFC with comments
(We owe s/c model inputs)
27 June 2005
System Engineering

5. Miscellaneous Requirements
Contamination Control ( Rev 06)
Our internal requirements are modest; waiting to see Project requirements
Detectors could develop surface leakage if particulates accumulate on surface
Exposed electrical connections to detectors could lose conductivity if attacked by (primarily) salt atmosphere
Purge
This is a precaution against air borne contamination, esp. during I&T
Handling
At 5Kg total mass, we are in the “pick up and carry” class
27 June 2005
System Engineering

6. System Resources Mass Power Data Rate Proposal 4.3 Kg 4.6 watts
200/2K/200Kbps
Peak
6 Kg
12 watts
1K/100Kbps
CBE
5.0 Kg
5.1 watts
515/86.6Kbps
Allocation
5.6 Kg
6.0/9.0 watts
86.6Kbps
Margin
12%
18%/76%
n/a
Request add. Allocation
0.4 Kg
27 June 2005
System Engineering

7. 27 June 2005
System Engineering