Subject: [Fwd: SDO Weekly Report for October 29, 2004] From: Philip Scherrer Date: Fri, 29 Oct 2004 08:50:55 -0700 To: hmi_local--AT--quake.Stanford.EDU -------- Original Message -------- Subject: SDO Weekly Report for October 29, 2004 Date: Thu, 28 Oct 2004 17:08:08 -0400 From: Elizabeth A. Citrin To: big list SDO Weekly Report for October 29, 2004 Executive Summary: SDO has less than one week of funding and the HMI Instrument’s funded period of performance ends on October 29 2004. NASA Headquarters is aware of the situation. The Project has alerted our contractors and asked them to look at options to minimize impacts, but continued lack of attention to this problem will undoubtedly result in a stop work and schedule slips in multiple areas. Detailed Report: The SDO weekly systems meeting topic covered the area of I&T, with Dave Amason providing a detailed walkthrough of the SDO I&T flow to the SDO team. This meeting provided an excellent opportunity for the team to see the updated I&T flow and engage in an interactive discussion of the events, flow, activities, durations and issues on many aspects of the current plan. In addition, the SDO team is continuing to investigate and assess potential reliability anomalies with Hitachi EEPROM, an issue which recently surfaced on the STEREO project. There is evidence that some of the programmed EEPROM parts can lose portions of their programmed states, resulting in faulty data being retrieved during EEPROM read operations. The SDO team has consulted with members of the STEREO project, who are currently investigating this problem and assessing the impact to their mission. The SDO approach is two-pronged, consisting of 1) a Project-led push to increase the involvement of Code 300 and the Parts and Materials Branch towards investigating this EEPROM issue , and 2) pursuing SDO design mitigation approaches that will address the possible impacts of a EEPROM anomaly occurrence in flight. Spacecraft procurement activities continue to progress. Propulsion System ACS Thruster, Main Engine, and Pressure Regulator procurements were awarded. The ACS Digital Sun Sensor RFO was released. The Attitude Control System Reaction Wheel, Inertial Reference Unit, Star Tracker and Coarse Sun Sensor procurements are in proposal review. Vendor responses were received from the Power System Battery and Ka Band TWTA RFIs. The first TIM for the Propulsion System Tank was held at PSI. With regard to our in-house avionics and development units, efforts continued. The C&DH Bulk Memory Card Breadboard was delivered for testing, and the C&DH DC/DC Card Breadboard was in assembly. Testing of the C&DH Ka Comm Breadboard, C&DH S Com ASD Breadboard and SDN Core Breadboard continued. The PSE Solar Array Module, Output Module, Battery Module and Deployment Module Breadboards were all in layout. The second HGAS GIC Breadboard was delivered for testing. The Ka Band MMIC thermal degradation life test was continued, well past its 2 times lifetime requirement. A total of 9 responses were received for the SDO LiIon Battery RFI, and up to 12 responses are expected to the RFP when issued. The degradation performance predictions for all candidate LiIon battery cell technologies were completed and the results indicate that all of the candidates appear to display the capability of meeting the SDO mission requirements for voltage and capacity. The Project has been working productively with the GSFC Electrical Systems Division, and the C&DH and RF Branches and leads to explore additional resources that can be provided in these areas to assure timely Subsystem CDR’s and lower risk ETU and flight production paths. Several options have been identified and are being implemented. HMI held the final peer review this week before their CDR covering Mission Operations, MOC Ground System interface, and Integration and Test. The S/C Simulator arrived this week at LMSAL. The delivery came with software upgrades that allow HMI to verify command rate requirements on the SUROM. The HMI structural model underwent a source inspection and is due at LMSAL October 29. HMI thermal has completed a thermal analysis on the power board. The space wire bread board is in assembly. The breadboard will be used independently of the brassboard electronics to investigate issues with the SMCSLite card. Rutherford Appleton Laboratory (RAL) is on track to deliver the Development Model camera at the HMI CDR and expects to complete the last board this week. The SDO Software Quality Engineer (SQE) supported the HMI Flight Software Design Peer Review held at Lockheed Martin in Palo Alto, CA Oct. 19. The SQE assessed the peer review process and had no findings. The peer review was thorough and addressed all the necessary items. Progress continues in the AIA development effort with nearly 40% of the Structural Model (SM) components received, along with the bearings for the filterwheel mechanism life test units. After assembly is completed, these units will be prepared for vibe and thermal testing; life testing should begin in mid-November. AIA anticipates near-term delivery of two development model, back illuminated CCDs after completion of testing at e2v this week. LMSAL Mission Assurance inspected HMI and AIA processor boards at BAE and functional testing of the first AIA processor board was started. The AIA Spacecraft Simulator was received at LMSAL. Interim funding is being provided to AIA to maintain their efforts until full funding can be made after it is received from HQ. This week, the ground system's Data Distribution Subsystem (DDS) Front End Processor (FEP) from INSNEC received an upgraded demodulator from the vendor. This unit will undergo additional testing for any detectable performance enhancement. The BAFOs from the antenna vendors were all received on time with most questions and concerns being satisfactorily answered. However, the resulting responses did not change the ranking or first selection choice. Notification of the selection will take place next week. -- Liz Citrin SDO Project Manager 301-286-1222 FAX 301-286-0214 Cell 410-241-0503----------------------------------------------------------------------- Message sent to the following people: Brock.A.Carpenter--AT--LMCo.com Title--AT--lmsal.com althea.1.mcfield--AT--lmco.com barbara.fischer--AT--lmco.com dexter.duncan--AT--lmco.com edward.mcfeaters--AT--lmco.com friedlaender--AT--lmsal.com john.w.miles--AT--lmco.com jschou--AT--solar.stanford.edu larry.springer--AT--lmco.com lemen--AT--lmsal.com pete.kacensky--AT--lmco.com pscherrer--AT--solar.stanford.edu rbush--AT--solar.stanford.edu romeo--AT--quake.stanford.edu schryver--AT--lmsal.com tarbell--AT--lmsal.com wolfson--AT--lmsal.com ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~