# Presentation: 400198

## Space Weather Imaging Sentinel (SWIS)

- 	•	High cadence imaging spectrograph development
- 	•	Low mass/power instrumentation
- 	• 	Advanced communication/DSN for future deployment to Sentinel or remote locations

***Science Objectives:***
- 	•	Determine the most relevant observational signatures of               		flare, CME, and Solar Particle Event (SPE) eruption
- 	•	Identify precursor signatures which can be used to 		forecast flare, CME, and SPE eruption
- 	•	Identify what is needed to improve our ability to nowcast 		and forecast space weather & SPEs
- 	•	Identify the physical mechanisms of mass flow and 		energy release in the solar atmosphere
- 	•	Determine the interaction and connectivity of structures 		throughout the solar atmosphere

***Space Weather Imaging Sentinel (SWIS)***

***Mission Description:**** **(Near/Intermediate Term)*
- 	•**	****Example Mission Design**
- 			-	1 spacecraft, 5 Hi-TRL instruments (4 remote, 1 in-situ) 			    -	L1 or Geo or 98°, 600 km sun-synch orbit
- 			-	continuous solar viewing
- 			-	3-axis stabilized, 30 arc-sec pointing capability
- 			-	Payload: 40 kg, 53 W, 2.2 Mbps
***Measurement Strategy:***
- 	•	UV/EUV Imaging Spectrograph for flow velocities & energy buildup		& release signatures, both on the disk and off-limb (out to 3 Rs)	•	Filter Magnetograph for surface magnetic field measurements
- 	•	Chromospheric/Coronal EUV Imagers for morphology and dynamics
- 	•	Energetic Particles (SEP) measurements for event characterization
- 	•	Coronagraph for detection & characterization of Halo CMEs

***Associated RFAs:***
- 	•	*RFA F1:* “Understand magnetic reconnection as revealed in solar flares, CMEs,...”
- 	•	*RFA F2:* “Understand the plasma processes that accelerate and transport particles.”
- 	•	*RFA J2:* “Develop the capability to predict the origin and onset of solar activity and disturbances associated with potentially hazardous space weather events.”

## SWISInstrument Summary

| Instrument | Mass (kg) | Power (w) | Data Rate (Mbps) |
| --- | --- | --- | --- |
| UV/EUV Spectrograph | 20 | 35 | 1 |
| Filter Magnetograph | 6 | 6 | 0.5 |
| Chromospheric/Coronal EUV Imager(s) | 5.6 | 3 | 0.5 |
| Coronagraph | 5.2 | 3 | 0.2 |
| Energetic Particles Detector | 3 | 6 | 0.01 |
|  |  |  |  |
| TOTAL | 39.8 | 53 | 2.21 |

**Instrument payload complement/characteristics provided by cognizant science advocates within Heliophysics community.**

## SWISConceptual Block Diagram

**POWER**

**PAYLOAD**

**ATTITUDE CONTROL**

**TELECOMMUNICATIONS**

- BATTERY

-  OMNIS

- HGA

- Chromospheric
- Coronal EUV
- Imager(s)

- Filter
- Magnetograph

- UV/EUV
- Spectrograph

- Energetic
- Particles
- Detector

- Coronagraph

- PYROTECHNICS

- PROCESSOR & LOCAL MEMORY
- FLIGHT S/W
-   - CMD, TLM, Fault Prot.

**COMMAND &**
**DATA HANDLING**

- HEATERS
- SENSORS
- THERMOSTATS

**THERMAL**

- POWER
- DISTRIBUTION
- UNIT

- REACTION
- WHEELS

- S/C
- POWER
- BUS

- PWR
- AMP

- SOLAR
- ARRAYS

- THERMAL
- INTERFACE

- UPLINK/DOWNLINK
- INTERFACE

- DC/DC
- CONVERTER

- TRANSPONDER

- AVIONICS cPCI BACKPLANE

- SCIENCE INSTRUMENT
-  INTERFACE

- SYSTEM I/O INTERFACES

- COARSE
- SUN
- SENSORS

- TORQUE
- BARS

- IMU

- STAR
- CAMERA

- G

- MAGNETOMETER