STATUS/ACCOMPLISHMENTS
This week the systems/subsystems team focused on the Observatory mechanical 
bus design, with the mechanical team providing an update of their detailed 
design work since the SDO SRR/SCR.  The update addressed many of the design 
and implementation issues raised both at the review itself and 
afterwards.  As part of the ongoing subsystem definition and design 
process, subsystem teams provided the systems team with an initial draft 
cut of their Level 3 requirements.  In addition, the process of updating 
the Mission Requirements Document (MRD), which contains many of the driving 
SDO Level 2 requirements, has begun, beginning with previously provided 
instrument updates.  Systems/subsystems work also continued in a variety of 
development areas, such as cPCI implementation, SDN design approach issues, 
and Electrical System Spec development.  Weekly High Gain Antenna meetings 
continued and a number of splinter groups were established for pointing, 
calibration, Mechanical/RF, ACS interface, gimbal, electronics, dynamic 
analysis, and test flow.  Finally, the GN&C team presented an excellent 
trade study update on the propulsion system options as part of their 
ongoing process to address issues raised at the SDO SRR/SCR and to move 
ahead in the preliminary design process.  Progress continues to be made on 
the Single Board Computer (SBC) procurement.  The SBC Statement of Work and 
Specification are nearly complete and a meeting to work some areas with SDO 
Contracts was conducted this week.

For the Instruments, the Instruments teams are busy completing their Phase 
A Concept Study Reports which will start to be delivered next 
week.  Progress also continues in the area of spacecraft simulators with 
the requirement/functions discussed in the weekly Instruments' 
telecon.  CCD specifications and packaging were updated by e2v and 
discussed in the weekly CCD/Camera electronics telecon.  Plans are going 
ahead for the peer review of the CCD at e2v on July 16th and camera 
electronics at RAL on July 17th.

The ground system team received 8 ASIST workstations (command & telemetry 
GSE) this week.  GSFC Building 23, room C110 will host the initial setup 
and integration of these workstations which will be offered as a mission 
development lab for future use.  This facility has raised flooring with 
sufficient power, network connections, & work and desk space.  Progress 
continues on the Ops Concept Document, Detailed Mission Requirements 
Document (DMR), and ground system schedule.  A SOC to MOC commanding 
interface document is also being drafted.

Now that the SDO Mission Assurance Requirements (MAR) document has been 
baselined, the flight assurance team is concentrating on base-lining the 
suite of supporting plans that identify how SDO will satisfy the MAR.  The 
Configuration Control Board (CCB) meeting for the System Safety Program 
Plan (SSPP) is scheduled for July 10th.  The Reliability Program Plan (RPP) 
and Risk Management Plan will be scheduled for later in the month.  In the 
area of reliability, the team developed a Reliability Block Diagram (RBD) 
and a Fault Tree (FT) for the deployable systems and will meet with the 
deployable systems lead next week to go over the RBD & FT along with design 
options.  The HMI (Lockheed Martin) draft Software Management Plan has been 
received and is being reviewed for compliance to the applicable portions of 
the SDO Mission Assurance Requirements (MAR) document.  The parts team 
resolved board layout issues with the Subsystem Data Node (SDN) prototype 
design and completed the parts kit & delivery of components needed to build 
the 2 SDO SDN prototype boards.  Our Parts lead also traveled to 
International Rectifiers (IR) Advanced Analog division in Santa Clara, 
California to gather additional information on their M3G converters which 
may be used on the SDO program (S/C & possibly HMI & EVE).

In the area of CM & project support, the team: continues to work the SBC 
CCR process; updated the action item database with responses received this 
week; provided comments to ISO documents; continues to evaluate the 
intranet database screens & address issues in preparation of making the 
system available next week; started coordinating the CCR for the 
modification of the HMI SOW for reliability enhancements; reached a verbal 
agreement with both ASTRO-E2 for SDO to begin occupying a major portion of 
their cubicle space in Bldg. 29/Rm. 360 in late fall /early winter of 2003 
and ST-5's space in late 2004.  Bob Vernier, the Bldg. 29 Building Manager, 
has concurred with this plan.  SDO personnel also participated in Celebrate 
Goddard Day by manning a booth for the Goddard Fitness Club.

Thanks,
Ken

"One of the illusions of life is that the present hour is not the critical 
decisive hour.  Write on your heart that every day is the best day of the 
year."
Ralph Waldo Emerson
American Poet & Philosopher

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