SATPC0041116 TAB 04 4 SOW.pdf

Effective Date: May 4, 2026

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400-FORM-0002 (4/16/2014)

National Aeronautics and Space Administration

Goddard Space Flight Center Greenbelt, Maryland

Reference Document

STRIVE-MGMT-SOW-0002, Revision - Stratosphere Troposphere Response using Infrared

Vertically-resolved Light Explorer, Code 404

STRIVE Main Electronics Box Investigation Statement of Work (SOW) https://idptdms.gsfc.nasa.gov/

STRIVE MEB Investigation SOW STRIVE-MGMT-SOW-0002, Revision -

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400-FORM-0002 (4/16/2014)

Table of TBDs

Action Item No.

Location Summary Individual/ Organization

Actionee TBD-1 Section 2 Max and Average Power Electrical TBD-2 Section 2 Heater Service Outputs Thermal TBD-3 Section 2 Temperature Sensors Thermal

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400-FORM-0002 (4/16/2014)

Table of Contents

1 PURPOSE

2 MEB SPECIFICATIONS

3 DURATION OF THE STUDY

4 DELIVERABLES

5 TECHNICAL EXANGE MEETINGS, REPORTS, AND REVIEWS

Appendix A Abbreviations and Acronyms

Reference Document

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1 PURPOSE

The Contractor shall conduct an investigation to develop the Main Electronics Box (MEB) concept and define electrical, thermal, mechanical, flight software interfaces that will meet the requirements for Stratosphere Troposphere Response using Infrared Vertically-resolved light Explorer (STRIVE) mission payload.

2 MEB SPECIFICATIONS

• Mechanical Form Factor: Utilize the Sensors Unlimited standard 1280JSX Enclosed

Camera form factor or equivalent.

• Thermal Requirements: Temperature of the mechanical interface is expected to be held within the range of -10 °C to +50 °C operational and -20°C to +50°C survival.

• Voltage input range is +28 VDC to +34 VDC.

• Max and Average Power TBD-1

• Support the following interface:

o RS-422 1 PPS from spacecraft o RS-422 UART for command and telemetry to and from the spacecraft o LVDS SpaceWire to transmit science data to the spacecraft (66.9 Mbps peak rate) o Power (28V -34 V) 6 Amp Max o RS-422 1 PPS out to the Mechanism Control Electronics (MCE) o LVDS UART to the MCE for command and telemetry o Power output to the MCE (unregulated from the spacecraft) o RS-422 1 PPS out to the Focal Plane Interface Electronics (FPIE) o Power (12 Volts) to the FPIE o LVDS UART to the FPIE for command and telemetry o LVDS Spacewire input from the FPIE for science data o 4 28-volt pulse commands for actuators o 10 Heater service outputs (which ones are switched and the sizes are TBD-2) o Temperature sensors: 35 PRT inputs reading -243/60 and TBD-3 reading +60/-60 o LVDS UART to the ARGOS Camera for command and telemetry o Power (12 Volts) to the ARGOS Camera o RS-422 UART for command and telemetry to and from the cryo-cooler electronics

3 DURATION OF THE STUDY

The investigation will last for 8 months from award.

After all deliverables are complete, 4 hours per week of engineering support shall be provided.

4 DELIVERABLES

The Contractor shall deliver the following:

• MEB development schedule including the following o Including I&T approach o Including the EM MEB deliveries o Possibility of early EM deliveries for early interface testing

Reference Document

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o Identification of all procurements and lead times

• MEB Qualification (what tests are going to be performed)

• List Electrical Ground Support Equipment (EGSE) that will be delivered/supported

• MEB Specifications:

o General Information: Features, Background, Block Diagram, Key Components o Electrical interfaces: Processor (description and usage), FPGA (description (block diagram, interfaces, clock and reset, programming process) and usage), memory, digital, analog, electrical power, inrush, timing, interface connector and connector pinouts.

o Mechanical interfaces: envelope, mass, and mechanical interface drawing o Thermal interfaces: locations for conducting away power dissipation, operating, qualification and survival limits.

o Environmental Specifications

• MEB Users Guide o FSW interfaces: command interface, downlink protocol, internal buffering.

o Initialization (system, processor, interfaces, memory, etc.)

o Watchdog servicing o Memory Scrubbing

Each deliverable shall be delivered as an initial draft two months after the beginning of the investigation, as an interim draft four months after the beginning of the investigation, and as a final draft seven months after the beginning of the investigation.

5 TECHNICAL EXANGE MEETINGS, REPORTS, AND REVIEWS

The Contractor shall support the following meetings, reports, and reviews:

• Discussion about alternative parts to mitigate radiation risk with parts list

• Weekly teams/zoom meeting for information exchanges, concerns, questions

• Monthly status report summarizing accomplishments, schedule forward, needs from

STRIVE team, status on any open items.

• A kickoff technical interchange meeting o The Contractor shall host and organize this meeting at the Contractor's facility

• Two technical interchange meetings at Goddard Space Flight Center

• A Specification and Users Guide document review with the customer team providing comments o The Contractor shall host this meeting at the Contractor's facility

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Appendix A Abbreviations and Acronyms

ARGOS Aerosol Radiometer for Global Observation of the Stratosphere EGSE Electrical Ground Support Equipment EM Engineering Model FPGA Field Programmable Gate Array FPIE Focal Plane Interface Electronics FSW Flight Software I&T Integration and Test MCE Mechanism Control Electronics MEB Main Electronics Box STRIVE Stratosphere Troposphere Response using Infrared Vertically-resolved light

Explorer TBD To be determined