Science Museum, London, 5 October 2018

Sixty Years of Satellites

Set the Controls for the Heart of the Sun

Matthew STUTTARD, Advanced Systems Architect

Parker Solar Probe

Why Study the Sun?

Understand how stars work

Develop high energy

plasma physics (fusion)

Understand solar activity to

improve forecasts of severe

space weather

Solar Missions, Science Museum, Stuttard 2 5 October, 2018

Saint Patrick’s Day Storm: March 17, 2015

5 October, 2018 Solar Missions, Science Museum, Stuttard 3

Solar Orbiter – a close-up high resolution study of the sun

5 October, 2018 Solar Missions, Science Museum, Stuttard 4

What is Solar Orbiter?

A spacecraft that will study the Sun and inner

heliosphere for 7 years

instruments to study surface and atmosphere

imagers, spectrometers

instruments to measure environment around the

spacecraft

particle detectors, magnetometers

Adding to knowledge gained from past missions

SOHO, Ulysses, STEREO A & B, SDO

..and current missions

Parker Solar Probe

Procured by: European Space Agency

with NASA participation

Prime contractor: Airbus Defence and Space Ltd

Launch Window: 6-24 February 2020

Determined by Earth-Venus geometry

Solar Missions, Science Museum, Stuttard 5

Solar Orbiter exploring the Sun's realm; Copyright: ESA/AOES

5 October, 2018

What questions will it answer?

How and where the solar

wind plasma and magnetic

field originate in the corona

How solar transients

drive heliospheric

variability

How solar eruptions

produce energetic

particle radiation

that fills the

heliosphere

How the sun dynamo

works and drives

connections between

the Sun and the

heliosphere

Solar Missions, Science Museum, Stuttard 6 5 October, 2018

What will Solar Orbiter do that previous missions haven’t?

In-situ measurements close to the Sun – 20 fly-bys

Pristine solar wind streams

Reduced scattering of energetic particles

Quasi co-rotating vantage point

Solar Orbiter tracks the same features as it orbits

Can watch magnetic activity building up that can lead

to flares/ CMEs

Simultaneous high-res imaging and spectroscopic

observations

North and South Solar Pole observations

We cannot see the polar regions from Earth’s orbit

Synergies with Solar Probe measurements

Simultaneous In-situ measurements of particle fluxes

at 9 and 59 solar radii

Solar Missions, Science Museum, Stuttard 8

Min heliospheric

latitude +/- 5 days

Perihelion

+/- 5 days

Max heliospheric

latitude +/- 5 days

Remote Sensing

observations

High data rate

acquisition

In situ observations

low data rate acquisition

LEOP

7 days

NECP

~2 months

CP

~3 years

NMP

~3.5 years

EMP

~2.5 years

Science WindowEarth GAM Venus GAM

Launch

5 October, 2018

How Does it Work ? Spacecraft Sub-systems

Solar Missions, Science Museum, Stuttard 9

AOCS

DMS

Originator: H.J. Koenig, EADS Astrium GmbH

Electrical Architecture and Interface

Diagram

Doc.No.: SO-ASD-DW-00001 Issue 1 Rev 1

Date: 15.05.2009

Equipments

APM(E) Antenna Pointing Mech. (Electronics)

OBC On-Board Computer

CSS Coarse Sun Sensor

DST Deep Space Transponder

FCE Failure Control Electronic

HD Hold-Down (Release Mechanism)

HGA High Gain Antenna

IMU Inertial Measurement Unit (Gyro’s)

KAT Ka-Band Translator

LGA Low Gain Antenna

LV Latch Valve

MGA Medium Gain Antenna

PCDU Power Control & Distribution Unit

PT Pressure Transducer

PV, ISV Pyro Valve, Isolation Pyro Valve

RFDA RF Distribution Assembly

RIU Remote Interface Unit

RMU Rate Measurement Unit

RW Reaction Wheel

SADM Solar Array Drive Mechanism

SADE Drive Mechanism Electronics

SSMM Solid State Mass Memory

STR Star Tracker

THR Thruster

TWTA Travelling Wave Tube Amplifier

WGS Waveguide Switch

SOLO Solar Orbiter

SH_IF Sunshield and I/F Structure

AOCS Attitude Orbit Control System

DMS Data Management System

EPS Electrical Power Subsystem

CPS Chemical Propulsion Subsystem

TCS Thermal Control Subsystem

Solar OrbiterAPR Array Power Regulator

CPDU Command Pulse Distribution Unit

EPC Electronic Power Converter

HPCG High power Command Generator

MPPT Maximum Power Point Tracker

PM Processor Module

TFG Telemetry Frame Generator

Internal Functions & Interfaces/SignalsComposites & Subsystems Legend:

MIL-1553B Bus

Termination

internally redundant

MIL-1553B Bus Coupling

Transformer (long stub)

Latching Current Limiter (LCL): Current-TM,

ON/OFF-Cmd/Status

Switch (Solid state or relay)

Current Source

Foldback Current Limiter (FCL): Current-TM

DC/DC Converter (galvanic isolation)

C

Z

BC Bus Controller (MIL-1553B)

RT Remote Terminal (MIL-1553B)

FCV Flow Control Valve Control

UP: upstream, DN: downstream

HTR Heater

SpW SpaceWirePower and Signal OR-ing

(e.g. using diodes)Test-/Skin-Connector

Z

Skin Conn.

Solar Orbiter Payload

Data R. ~ 13 Kpbs

MAG

Status/Temp

SpW 01 A+B

Sync A + B

LCL A + B

Cmd/Stat

Data R. ~ 20 Kbps

EUI

Status/Temp

SpW 02 A+B LCL A + B

Cmd/Stat

Data R. ~ 4 Kbps

EPD

Status/Temp

SpW 03 A+B LCL A + B

Cmd/Stat

Data R. ~ 20 Kbps

PHI

Status/Temp

Spw 04 A+B LCL A + B

Cmd/Stat

Data R. ~ 0,2 Kbps

STIX

Status/Temp

SpW 05 A+B LCL A + B

Cmd/Stat

Data R. ~ 30 Kbps

RPW

Status/Temp

SpW 06 A+B LCL A + B

Cmd/Stat

Data R. ~ 20 Kpbs

SoloHI

Status/Temp

SpW 07 A+B LCL A + B

Cmd/Stat

Data R. ~ 17 Kbps

Spice

Status/Temp

SpW 08 A+B LCL A + B

Cmd/Stat

Data R. ~ 14 Kbps

SWA

Status/Temp

SpW 09 A+B LCL A + B

Cmd/Stat

Data R. ~ 10 Kbps

METIS

Status/Temp

SpW 10 A+B LCL A + B

Cmd/Stat

MAG

Boom HTR Pwr

Status/Temp

HD1

LCL (A+B)

LCL (A+B)

LCL (A+B)

LCL (A+B)

LCL (A+B)

LCL (A+B)

LCL (A+B)

LCL (A+B)

LCL (A+B)

LCL (A+B)

LCL (A+B)

SSMM

Memory

Mod. 1

(256 Gbit)

Ou

tpu

t- I

F B

Memory

Contr. A

Memory

Contr. B

PS B

DC

/DC

MC

B

Memory

Mod. 2

(256 Gbit)

Memory

Mod. 3

(256 Gbit)

Ou

tpu

t-IF

A

O u t p u t

C r o s s -

S t r a p

I n p u t

C r o s s -

S t r a p

DC

/DC

MM

&IO

B

PS A

DC

/DC

MM

&IO

A

DC

/DC

MC

A

Inp

ut-

IF A

Pa

ylo

ad

Sp

ace

wire

IF

s A

Inp

ut-

IF B

Pa

ylo

ad

Sp

ace

wire

IF

s B

R

R

R

R

R

R

R R

Launcher-IFs EGSE I/F

Communication System

RFDA

X -

Dipl.1

X-

Dipl.

2

X-MGA

X-LGA 1

WGS

-4

WGS

-2

WGS

-1

WGS

-3

WGS-5

X-LGA 2

MGAPM

(3-axis)

Drv

A+

B (

3-a

xis

)

X-RFI-2

X-RFI-1

Ka-RFI-2

Ka-RFI-1

X/Ka-

HGA

X/Ka-

Bd

Feed

HGAPM

(2-axis)

Sh

ort

WGS-6

3 dB

Coupler

X-TWTA-2

EPC

X-TWTA-1

EPC

Ka-TWTA-1

EPC

Ka-TWTA-2

EPC

Drv

A+

B (

2-a

xis

)

LCL(B)

TC/TM

Ka-

Coupler

LCL(A)

TC/TM

LCL(B)

TC/TM

LCL(A)

TC/TM

PYR

(A+B) HDs

HDs PYR

(A+B)

Status

(A+B)

Status

(A+B)

APMED

C/D

C

DC

/DC RT

N R

RT

N R

HGA

Safe

Pos.

MGA

Safe

Pos.

X-TC

(Test)

X-TC

(Test)

CPS

Tanks

PRESSURE

TRANSDUCERs

Low Pressure: PT-1 to PT-2

High Pressure: PT-3

AOCS Thrusters (T1)

10N Dual Seat Solenoid Valve

THR2-1A to -8A (prime)

THR2-1B to -8B (red.)

PV-01 to -06

NORMALLY

CLOSED

PV-07,-08

NORMALLY

OPEN

ISV-01/02

NORMALLY

CLOSED

PYR (A+B)

PYR (A+B)

EGSE I/F

(Skin)

RIU

OB

C IF

B

OB

C IF

A

OB

C IF

B

OB

C IF

A

Controller A&B

ST

D I/O

A

EHP

ANP (24)

ANY (80)

AN2 (12)

AN1 (8)

BLD (12)

RSA (48)

SHP (64)

PTA (8)

ANT

LCL DC/DC

ST

D I/O

B

EHP

ANP (24)

ANY (80)

AN2 (12)

AN1 (8)

BLD (12)

RSA (48)

SHP (64)

PTA (8)

ANT

CD/DC

ST

D I/O

C

CD/DC

ANP (24)

ANY (80)

AN2 (12)

AN1 (8)

BLD (12)

RSA (48)

SHP (64)

CP

S-I

/O A

1 CH

TVC

1VC

FCV

Drivers

LV Drivers

LVC

LCL DC/DC

LCL DC/DC

CP

S-I

/O B

1 CH

TVC

1VC

FCV

Drivers

LV Drivers

LVC

LCL DC/DC

LCL DC/DC

FCE

Controller

A

ST

D I/O

A

CUR_A

BLD

ST

D I/O

B

CUR_A

BLD

RSA

SHP

TFG

VC1

TFG

VC2

TFG

VC3

TFG

VC1

TFG

VC2

TFG

VC3

OBC

Processor

Module (A)

Processor

Module (B)

OBC Mass

Memory 2

Service Mode Link

OBC Mass

Memory 1

SS

MM

A IF

SS

MM

-B IF

ME

TIS

In

str

.

RIU

-B IF

s

Pro

ram

EE

PR

OM

1

Pro

ram

EE

PR

OM

2

EPC

COMMS

BC

N R

AOCS

BC

N R RIU

-A IF

ME

TIS

In

str

.

SS

MM

-B IF

SS

MM

A IF

RIU

-B IF

s

RIU

-A IF EPS

COMMS

BC

N R

AOCS

BC

N R

DC/DC A

(Cold)

DC/DC B

(Cold)

S/C Elapsed Time (SCET)

Reconfiguration Module (RM)

Alarm Conditioning

Safeguard Memory (SGM)

High Priority Cmd Generator (HPCG)

(A) (B)OC

XO

OC

XO

Ana Alarms in (A+B) 3 x 6

AOCS Puls Signal (A+B) 8

HPC (A+B) 64 Cmd

RSA (A+B) 64 Status

Dig Alarms in (A+B) 3 x 6

Puls per Sec (A+B) 8

TC-Decoder

& CPDU

TFGs

X-Bd/Ka-Bd

(A)DC/DC A (Hot)

TM/TC Bypass

X-TM – 1A / 2A

Ka-TM – 1A / 2A

X–TC – 1A / 2A

SpW VC2 X-Band Nom

SpW VC3 Ka-Band Nom

SpW VC1 X-Band Nom

TC-Decoder

& CPDU

TFGs

X-Bd/Ka-Bd

(B)DC/DC A (Hot)

TM/TC Bypass

X-TM – 1B / 2B

Ka-TM – 1B / 2B

X–TC – 1B / 2B

SpW VC2 X-Band Red

SpW VC3 Ka-Band Red

SpW VC1 X-Band Red

Controller

B

LC

L D

C/D

C

LC

L D

C/D

C

WG

S-1

A P

os 1

WG

S-1

B P

os 1

WG

S-1

A P

os 2

WG

S-1

B P

os 2

WG

S-1

A S

tatu

sW

GS

-1 B

Sta

tus

WG

S-2

A P

os 1

WG

S-2

B P

os 1

WG

S-2

A P

os 2

WG

S-2

B P

os 2

WG

S-2

A S

tatu

sW

GS

-2 B

Sta

tus

WGS-1 WGS-2

WG

S-3

A P

os 1

WG

S-3

B P

os 1

WG

S-3

A P

os 2

WG

S-3

B P

os 2

WG

S-3

A S

tatu

sW

GS

-3 B

Sta

tus

WGS-3

WG

S-4

A P

os 1

WG

S-4

B P

os 1

WG

S-4

A P

os 2

WG

S-4

B P

os 2

WG

S-4

A S

tatu

sW

GS

-4 B

Sta

tus

WGS-4

WG

S-5

A P

os 1

WG

S-5

B P

os 1

WG

S-5

A P

os 2

WG

S-5

B P

os 2

WG

S-5

A S

tatu

sW

GS

-5 B

Sta

tus

WGS-5

WG

S-6

A P

os 1

WG

S-6

B P

os 1

WG

S-6

A P

os 2

WG

S-6

B P

os 2

WG

S-6

A S

tatu

sW

GS

-6 B

Sta

tus

WGS-6

DST-1

Ka-B

an

d

Tra

ns.

A

X-B

an

d

Tra

ns.

A

LCL DC/DC

X-B

an

d

Re

ce

ive

r/D

em

od

A

FCL DC/DC

Ka-TM 1A

Ka-TM 1B

RTN

R

X-TM 1A

X-TM 1B

X-TC 1A

X-TC 1B

Discrete TM/TC

DST-2

Ka-B

an

d

Tra

ns.

B

X-B

an

d

Tra

ns

.B

LCL DC/DC

X-B

an

d

Re

ce

ive

r/D

em

od

B

FCL DC/DC

Ka-TM 2A

Ka-TM 2B

RTN

R

X-TM 2A

X-TM 2B

X-TC 2A

X-TC 2B

Discrete TM/TC

1553B-Bus A+B

1553B-Bus A+B

10 N Dual Seat Valve

Prime Branch

10 N Dual Seat Valve

Redundant Branch

NT 01

He

Pressurant

MMH 2

1A 2A 3A 4A 5A 6A 7A 8A 1B 2B 3B 4B 5B 6B 7B 8B

PV 02 PV 01PT3

H/P

FW 01

TP 02

TP 03

FW 05

FDV 07

TP 09F 1

FO 01FO 02

F 2

PT 1

L/P

PT 2

L/P

ISV1AISV2BISV2A ISV1B

TP 10

FDV 08

FW 06

TP 04

PV 04 PV 06 PV 03 PV 05

PV 08 PV 07

NRV 4

NRV 2 NRV 1

NRV 3

Orifice

F3

IMU

Red.

Elec.

Main

Elec.

LCL DC/DC

4 Gyro

& Acc.

RTN

R

RTN

R

Discr. TM/TC

Sync. (tbc)

Discr. TM/TC

Sync. (tbc)

LCL DC/DC

C

(2)

C

(6)

C

(2)

C

(2)

C

(2)

C

(2)

C

(2)

C

(8)

ZZ

C

(2)

C

(2)

C

(2)

C

(2)

C

(2)

C

(2)

C

(2)

C

(2)

ZZ

C

(2)

C

(4)C

(2)

C

(4)C

(2)

C

(4) ZZ

CP

S A

rmin

g (

Skin

-CB

s)

Tank Temp

LCL (PT-x)

PT-x Press

LV-1 to LV-4

OPEN Coil

CLOSE Coil

Valve Status

LV-xy

Open/CloseLV-xy

Status

T2-xy US FCV

T2-xy DS FCV

T2-xy Temp

CB Temp

CB HTR

OB

C -

A IF

OB

C -

B IF

OB

C -

A IF

OB

C -

B IF

Skin-Arm

/-Safe

Pyro

Firin

g (

A+

B)

PYR (A+B)

PYR (A+B)

So

lar

Arr

ay S

imu

lato

r I/F

Internal Functions & Interfaces/Signals

RSA

SHP

STR-1 LCL DC/DC

RTN

R

Sync

Discr. TM/TC

STR-2 LCL DC/DC

RTN

R

Sync

Discr. TM/TC

STR-3 LCL DC/DC

RTN

R

Sync

Discr. TM/TC

EPS

SADE 1

DC

/DC

DC

/DC

RT

N R

RT

N R PCDU

Battery

(Li-Ion)

Cell redundancy

Drive

(A+

B)

HTR

Cntl B

LCL B1 Sw 1

LCL Bn

Sw nHTR

Cntl A

LCL A1 Sw 1

LCL An

Sw n

MB Filter

Skin

-Arm

(-S

afe

) tb

c

BDDBatt.

Pwr

LCLs / FCLs A

FCL OBC A

FCL DST A

Payload-

LCLs A

Platform-

LCLs A

Voc, Isc

Drive

(A+

B)

Earth Reference point

close to separation plane

Voc, Isc

BCDR

Protection

MonitorsOFFOFF

OFF

DC/DC

Converter

OFF

OFF

DC/DC

Converter

Failure

Detector

Protection

Failure

Detector

OFF

BCDR

Protection

MonitorsOFFOFF

OFF

DC/DC

Converter

OFF

OFF

DC/DC

Converter

Failure

Detector

Protection

Failure

Detector

OFF

BCDR

Protection

MonitorsOFFOFF

OFF

DC/DC

Converter

OFF

OFF

DC/DC

Converter

Failure

Detector

Protection

Failure

Detector

OFF

BCDR

Protection

MonitorsOFFOFF

OFF

DC/DC

Converter

OFF

OFF

DC/DC

Converter

Failure

Detector

Protection

Failure

Detector

OFF

BCDR

Protection

MonitorsOFFOFF

OFF

DC/DC

Converter

OFF

OFF

DC/DC

Converter

Failure

Detector

Protection

Failure

Detector

OFF

BCDR

Protection

MonitorsOFFOFF

OFF

DC/DC

Converter

OFF

OFF

DC/DC

Converter

Failure

Detector

Protection

Failure

Detector

OFF

APRProtection

&

Filter

DC/DC

Converter

Failure

Detector

MPPT Control

OFF

Voting

OFFOFF

APRProtection

&

Filter

DC/DC

Converter

Failure

Detector

MPPT Control

OFF

Voting

OFFOFF

APRProtection

&

Filter

DC/DC

Converter

Failure

Detector

MPPT Control

OFF

Voting

OFFOFF

APRProtection

&

Filter

DC/DC

Converter

Failure

Detector

MPPT Control

OFF

Voting

OFFOFF

Main Error Amplifier (MEA)

DNEL, HK-Cond., Battery Discharge

Detector, Battery Voltage Alarm

Main Error Amplifier (MEA)

DNEL, HK-Cond.,

Battery Discharge Detector,

Battery Voltage Alarm

APRProtection

&

Filter

DC/DC

Converter

Failure

Detector

MPPT Control

OFF

Voting

OFFOFF

APRProtection

&

Filter

DC/DC

Converter

Failure

Detector

MPPT Control

OFF

Voting

OFFOFF

APRProtection

&

Filter

DC/DC

Converter

Failure

Detector

MPPT Control

OFF

Voting

OFFOFF

APRProtection

&

Filter

DC/DC

Converter

Failure

Detector

MPPT Control

OFF

Voting

OFFOFFSA Pwr A

SA Pwr A

SA Pwr B

SA Pwr B

SA

DM

HD

2A

– 2

B

Solar Array-2

PA

NE

L

4

Front

Back

PA

NE

L

3

Front

Back

Y

O

K

E

SA

DM

LCLs / FCLs B

FCL OBC B

FCL DST B

Payload-

LCLs B

Platform-

LCLs B

TM/TC-IF AAux-

Cnv-A

RT

N R

Ala

ms

Dis

cr.

TM

/TC

TM/TC-IF BAux-

Cnv-B

RT

N R

Ala

ms

Dis

cr.

TM

/TC

Pyro Mod A

Sel N

Sel 1

ARM

ARM

Pyro Mod B

Sel N

Sel 1

ARM

ARM

28 V ± 0,1

HD

1A

– 1

B

Solar Array-1

PA

NE

L

2

Front

Back

PA

NE

L

1

Front

Back

Y

O

K

E

SADE 2

DC

/DC

DC

/DC

RT

N R

RT

N R

FCE

BC

N R

FCE

BC

N R

FCE

RT

N R

FCE

RT

N R

C

(2)

C

(2)C

(2)

C

(2)

1553B-Bus A+BZZ

C

(2)

C

(2)C

(2)

C

(2)ZZ

CSS +X-X+y-y

+X-X+y-y

+X-X+y-y

CSS +X-X+y-y

+X-X+y-y

C

(2)

C

(2)C

(2)

C

(2)C

(2)

C

(2)C

(2)

C

(2)

RMU-1

LCL DC/DC

Serial TLM+Serial TLM-

Serial CMD+

Analogue ARox

Analogue ARoy

Analogue ARoz

Analogue GND

Serial CMD-

Serial SYNC+Serial SYNC-

RMU-2

LCL DC/DC

Serial TLM+Serial TLM-

Serial CMD+

Analogue ARox

Analogue ARoy

Analogue ARoz

Analogue GND

Serial CMD-

Serial SYNC+Serial SYNC-

RMU-3 LCL DC/DC

Serial TLM+Serial TLM-

Serial CMD+

Analogue ARox

Analogue ARoy

Analogue ARoz

Analogue GND

Serial CMD-

Serial SYNC+Serial SYNC-

CPS

I/O A

FCV

Drivers

DC/DC

CPS

I/O B

FCV

Drivers

DC/DC

Serial

I/O

A+B

WDE-1LCL DC/DC

Discr. TM/TC

RTN

R

Heater Power

WDE-2LCL DC/DC

Discr. TM/TC

RTN

R

Heater Power

WDE-3LCL DC/DC

Discr. TM/TC

RTN

R

Heater Power

WDE-4LCL DC/DC

Discr. TM/TC

RTN

R

Heater Power

RWA-1RWA-2RWA-3RWA-4

Space Wire

Sp

ace

Wire

Sp

ace

Wire

5 October, 2018

Four local environment (In-situ) instruments

MAG, SWA, EPD, RPW

Provide data on the local Solar plasma environment

particles, mag fields, plasma flux, radio bursts

RPW: Studying local electromagnetic

and electrostatic waves and Solar

radio bursts

SWA: Sampling constituents of the

Solar wind

MAG: High precision measurements of

the heliospheric magnetic field

EPD: Measuring properties of

accelerated energetic particles emitted

from the Sun

5 October, 2018 Solar Missions, Science Museum, Stuttard 10

STIX: Provides imaging spectroscopy

of solar thermal and non-thermal X-ray

emission. Also acts as a ‘flare monitor’

for the other instruments

Six Remote sensing instruments

EUI, METIS, PHI, SolOHI, SPICE, STIX

Match in-situ observations with their source regions on the Sun

SPICE: Spectroscopy of the solar disk

and corona in UV.

EUI: UV imaging of the Solar corona

(studying eruptions as they propagate

out from the Solar surface).

METIS: High resolution UV and EUV

coronagraphy

PHI: Full disk and high-resolution

visible light imaging of the Sun.

SolOHI: Observe light scattered by the

solar wind to pinpoint coronal mass

ejections (CMEs).

5 October, 2018 Solar Missions, Science Museum, Stuttard 11

PHI

METIS EUI

STIX

SPICE

Remote sensing instruments on the MY panel

5 October, 2018 Solar Missions, Science Museum, Stuttard 12

Demanding alignment requirement (0.03˚)

Fields of View

Solar Missions, Science Museum, Stuttard 13

STIX/ PHI FDT

EUI FSI

METIS

SPICE

PHI HRT

EUI HRI

5 October, 2018

Design Challenges: Communications (X-band)

Solar Missions, Science Museum, Stuttard 14

Other design challenges

Thermal environment

From +600C to -180C

Pointing stability

Power generation

Densely packed payloads

Cleanliness on ground

Cleanliness in orbit

Electro-magnetic cleanliness

SADE

IMU

RIU

PCDU

SSMM

OBC

IMU

Battery

CommsGEU

Comms Structure

MGA

LGA 1

LGA 2

HGA 5 October, 2018

High data rate is just 180kbs

Transfer rates are less than a standard 3G or Wifi link

Instruments rely on on-board data processing and

compression to meet the telemetry requirements

Many instruments are prioritising data for download

Instruments are capable of overwriting data

Non-contact periods of up to 64 days

Spacecraft implements a store and forward approach

on-board

Spacecraft must be autonomous and able to cope

autonomously with FDIR

Management of three different antennas:

LGAs (LEOP and backup) 4π sr

MGA (Survival Mode, Strobing)

HGA (Nominal)

Distortion and pointing error in spec

Solar Orbiter - Flight Build Completed in Stevenage

Solar Missions, Science Museum, Stuttard 15 5 October, 2018

Solar Orbiter is now entering the next key phase:

one year in Environmental Test at IABG, Munich

Parker Solar Probe Magnetometer Boom Deployed

5 October, 2018 Solar Missions, Science Museum, Stuttard 16

NASA Mission: Parker Solar Probe

Technologies : •11.5cm thick carbon composite heat shield

•External temp 1377C, 650kW/sq.m

•Close approach (<0.25AU) solar array uses

pumped fluid cooling

5 October, 2018

•Understand origin /evolution of

solar wind – energy flows

– structure and dynamics of magnetic fields.

– mechanisms that accelerate and transport

energetic particles

•Launch: 12 Aug 2018

•7 VGAs over 7 years – Science phase of 24 solar orbits

•Will enter the Sun’s outer

atmosphere (corona) – 4 million miles (~9Rs) from ‘surface’ photosphere

– Where solar wind speeds up from subsonic to

supersonic and highest energy particles originate

• Four instrument suites – Fields

– Coronal imager (WISPR)

– Particles (SWEAP)

– Particles (ISʘIS)

Solar Orbiter and Parker

5 October, 2018

Solar Orbiter Parker

Closest approach 43m km (59 Rs) 7m km (9Rs)

Particles & Fields

measured

Synergistic data Solar feature

imaging/spectroscopy

Solar Polar Observation

Coronal Entry

Thank You !