# Presentation: 437684

## The SNAP Integration Model

**The SNAP Integration Model**

**Mechanical**
**Robin Lafever**
**LBNL Engineering**

## The Model

**The Model**

- Main Baffle Assembly

- Door Assembly

- Solar Array, ‘Sun side’

- Secondary Mirror
- Hexapod
- Bonnet

- Secondary Metering structure

- Primary Mirror

- Optical Bench

- Instrument Metering Structure

- Tertiary Mirror

- Fold-Flat Mirror

- Spacecraft

- Shutter

- Instrument Bay

- Instrument Radiator

- Solar Array, ‘Dark side’

- Hi Gain Antenna

- Solid-state recorders

- ACS
- CD & H
- Comm
- Power
- Data

- CCD detectorsNIR detectorsSpectrographFocal Plane guiders
- Cryo/Particle shield

## About this Model

**About this Model**

**The current model has evolved in response to the project design flow.  In its present form it **
**Provides a real-time snapshot of our combined thinking.**
**Becomes a Test-bed for detailed Trade studies. **
**Reveals immediate system interactions.**
**Brings all subsystems and mission objectives into one, tangible workspace.**

## How it works

**Weekly Engineering meetings hosted by Pankow at SSL or Lafever at LBNL.**
**The Intent:**
**All systems are represented.**
**Designs and Studies are initiated, teams form, effort goes off-line.**
**Results from earlier studies are reported, changes adopted, production goes off-line.**
**“****Hot” concerns get focused attention first.**
**The Effect:**
**Technical studies get tested as soon as they can be articulated.**
**Model updates and studies are iterated on a 1 to 3 week cycle.****Detail is sacrificed for speed.**
**Detailed studies are iterated on a 1 to 3 week cycle and incorporated into the model. Speed is sacrificed for detail. **
**Multiple ‘Fitup’ models can tolerate simultaneous development.**
**Integration models can be assembled at any time !**

## System Summary

**System Summary**

**The current, model-centric view of SNAP system interfaces looks like this:**
**Michael Levi   ****	****	****	****“The Mission”**
**Peter Harvey    ****	****	****	****“The Process”**
**Dave Pankow  ****	****	****	****“The Satellite”**
**Mike Lampton   ****	****	****	****“The Telescope”**
**Chris Bebek  ****	****	****	****“The Instrument”**
**Robin Lafever****John Bercovitz****Bobby Besuner   ****	****	****“The Model”**
**Current Cross-System issues under study**
**Natalie Roe****Henrik Von Der Lippe****Robin Lafever****	****	****	****Electronics packaging/cabling **
**Susana Deustua****John Bercovitz****	****	****	****Stray Light and Baffling**
**John Bercovitz****	****	****	****Shutter mechanisms**
**Manfred Bester****	****	****	****Dave Pankow****	****	****	****Antennae and Comm**

## Recent Studies reflected in this model

**Recent Studies reflected in this model**

**Stray Light/Baffeling**:
- John Bercovitz
- Susanna Deustua
- Mike Lampton

**Shutter Assembly:**
- Chris Bebek
- John Bercovitz
- Mike Lampton
- Robin Lafever

**Spacecraft:**
- Bobby BesunerDave Pankow
- Robin Lafever
- Michael Levi

**Spectrograph:**
- Robin Lafever
- Eric Prieto

**Instrument Electronics****Packaging**
- Natalie Roe
- Henrik Von Der Lippe
- Robin Lafever

**Focal Plane Assembly:**
- Chris Bebek
- John Bercovitz
- Robin Lafever

**Optical /Thermal Mounts:**
- Mike Lampton
- Robin Lafever
- Dave Pankow

**Baffle Structure/ Metering structure:**
- Dave Pankow
- Bobby Besuner

## Model Overview Cut 1

**Model Overview ****Cut 1**

**Door and Main Baffle Assembly**

## Model Overview Cut 1

**Model Overview ****Cut 1**

**Primary Interior Baffling**

## Model Overview Cut 1

**Model Overview ****Cut 1**

**Body-mounted Solar Arrays**

- Sun side

- Dark side

## Model Overview Cut 1

**Model Overview ****Cut 1**

**Optical Telescope Assembly in the**
**SNAP observatory**

## Model Overview Cut 1

**Model Overview ****Cut 1**

**Integrated OTA and Instrument package**

## Model Overview Cut 1

**Model Overview ****Cut 1**

**Integrated OTA and Instrument package**

## Model Overview Cut 1

**Model Overview ****Cut 1**

**Integrated OTA and Instrument package**

## Model Overview Cut 1

**Model Overview ****Cut 1**

**Spectrograph and Instrument detector assembly**

## Doors

**Doors**

## Doors

## Doors

## Doors

## Doors

**Doors**

**Door opening sequence**

## Packaging Cutaway

**Packaging Cutaway**

**Satellite in launch configuration**
**( MLI not shown )**

## Packaging Cutaway

**Packaging Cutaway**

**Interior structure and packaging**

## Model Overview Cut 2

**Model Overview ****Cut 2**

## Model Overview Cut 2

**Model Overview ****Cut 2**

## Model Overview Cut 2

**Model Overview ****Cut 2**

## Model Overview Cut 2

**Model Overview ****Cut 2**

## Instrument Detail

## Instrument Detail

**Instrument Detail**

## Instrument Detail

**Instrument Detail**

## Instrument Detail

**Instrument Detail**

## Instrument Detail

**Instrument Detail**

## Instrument Detail

**Instrument Detail**

## Instrument Detail

**Instrument Detail**

## Instrument Detail

**Instrument Detail**

## Instrument Detail

**Instrument Detail**

## Instrument Detail

**Instrument Detail**

## Instrument Detail

**Instrument Detail**

## Current Focal Plane Model

- Shutter Assembly

- Filter Array

- Detector Array

- PC back end electronics

- Spectrograph

- Incoming, Science light

- Transition light

- “Dark Inner Cone”

## Current Instrument Model

- Shutter

- Cryo/Particle/Light shield

- Filter array

- CCD / HgCdTl detector array

- Cold Plate

- Back-end electronics

- Spectrograph

- Thermal Links

- Radiator

- Near electronics

## Satellite Peel-away 01

**Satellite Peel-away ****01**

**Interior cutaway**

## Satellite Peel-away 01

**Satellite Peel-away ****01**

**Main Baffle structure**

## Satellite Peel-away 01

**Satellite Peel-away ****01**

**MLI envelope**

## Satellite Peel-away 01

**Satellite Peel-away ****01**

**Exterior MLI **

## Exploded View

## Optics

**TMA-62 Optics Model**

- Note:
- TMA-63 is our current prescription.
- For this model it is functionally identical to TMA-62.
- TMA-63 Model is Not-yet-ready-for-Prime-time

## Optics

**TMA-62**
**Basic Optics components**

## Optics

**Optics**

**TMA-62 optics with**
**Instrument **

## Telescope

**Telescope**

**TMA-62 Optics integrated with the **
**Optical Bench and **
**Instrument Assembly**

## Reflex Mirror Test Set-up

**Optical components**

## Reflex Mirror Test Set-up

**Optics and Optical Bench**

## Reflex Mirror Test Set-up

**Telescope Engineering test**

## Reflex Mirror Test Set-up

**Satellite end-to-end test**

## Moving Parts

## Satellite Peel-away 02

## Satellite Peel-away 02

## Satellite Peel-away 02

## Satellite Peel-away 02

## Satellite Peel-away 02

## Satellite Peel-away 02

## Satellite Peel-away 02

## Satellite Peel-away 02

## Deliverables

**The Models****The Assembly presented here, along with tooling, fiducials, and variations are available as 3d CAD models, and can be exported in a variety of formats. (earlier studies have been carried to NASA-IMDC and back, for example)****FEA models are also available**
**The Graphics****Screen shots, and Hi-res graphics are packaged as Web-available files in a variety of formats that feed directly into ongoing presentations, such as this one.**
**Engineering models****Low cost study models are already in the works****Mock-ups and study models, and exemplars exist already****And,**** John Bercovitz and Chris Bebek have examples of the REAL thing ! ****A “get yer hands in it !” scale mockup of the Optical Bench, and****Rapid Prototype detail models are being developed right now.**