IES OperationsP. Mokashi

IES Team Meeting, SwRI29 May 2013

2

IES (SwRI)

Develop sequences (flight and EQM

test)

Develop tables, macros and patches if necessary

Test on simulator

Enter on RPC wiki

PIU (Imperial College, London)

Coordinate between RPC instruments

Integrate RPC science sequences

Convert wiki sequences into RSOC / RMOC

formats

RSOC (ESAC, Spain)

Coordinate non-interactive science

activities

RMOC (ESOC, Germany)

Interactive and maintenance

activities

EQM testing

Science activity uplink

Uplink development during cruise

3

IES (SwRI)

Develop sequences

Develop tables, macros and patches if necessary

Test on simulator

Enter observation definitions and conditions into the SGS system

Modify RSGS generated command sequences

PIU (Imperial College, London)

Coordinate between RPC instruments

RSGS (ESAC, Spain)

Develop the Rosetta science planning system

Generate activity timelines

Generate command sequences

RMOC (ESOC, Germany)

Interactive and maintenance

activities

Science activity uplink

EQM testing

Coordinate pre-landing activities

Uplink development for comet phase

4

Science & Operations Planning

Operations Planning Focus Lead in time Execution

Duration

Skeleton Plan Trajectory & Pointing

In development Entire Mission

Long Term Planning Trajectory 5 – 3 months 4 months

Medium Term Planning

Pointing, Resources

2 months – 2 weeks 1 months

Short Term Planning Commanding 2 – 1 weeks 1 week

5

Two main subsystems◦ Observation Management Subsystem (OBM)

Used to define instrument campaigns, observations and their associated planning, trajectory, attitude and resource characteristics and constraints

◦ Science Planning and Scheduling Subsystem (SPS) Automated scheduling and timeline generation based

on definitions, constraints and priorities using JPL’s ASPEN system

Includes spacecraft dynamics and geometry models Will generate activity timeline and

instrument commanding

Science Ground Segment System

6

Features◦ Includes monitoring campaign capability◦ No ability to manually schedule observations◦ The only way to get them scheduled and at desired

times is by changing the criteria (duration, frequency, geometric or other model based constraints, pointing)

◦ Includes ride-along campaigns (or eventually will) Status

◦ Concept has undergone several changes◦ Very ambitious system and schedule◦ Present status of some components is uncertain

SGS System

7

Would like to be on all the time (monitoring) in normal mode with some other RPC sensors

Burst mode◦ Would like periodic burst mode operations. All operating

RPC sensors would like burst mode at the same time◦ Additional burst mode operations determined by

trajectory and models, like boundary crossings Data has to be collapsed significantly as

bandwidth allocation for IES is very low, even in burst mode◦ Select the ranges and combine counts in adjacent

energy/azimiuth/elevation bins

Basic IES Operation

8

IES Operation is driven by mode tables Each table defines

◦ Normal or burst mode◦ Cycle length (128s, 256s, 512s, 1024s)◦ Selection of energies for data return◦ Collapse (sum) of counts in adjacent

Energies Elevations Azimuths

13 tables can be stored on board◦ Trade time resolution vs energy resolution vs angular

resolution

Tables

9

Internal sequences – programmable series of commands separated by delta times

Can call itself (loop) so a regular continuous sequence can be setup (example – cycle between 5 hours of normal mode and 1 hour burst mode OR cycle between high energy and angular resolution tables)

8 macros stored on board of which 4 are available for customization◦ 1 being used for gain test

Macros

10

Gain Tests will be performed periodically to determine the nominal MCP operating voltages

How frequently? Last gain test configuration:

◦ ~17 min at each 2525V, 2550V, 2575V, 2600V and back to nominal voltage of 2500

Gain Tests

11

March 31 & Apr 1, 2013 Distance from earth 4.2 to 4.3 AU OWLT: ~35 min 18 hours total with Sun in FOV for most of

the time Science data expected near real time (with

light time delay)

Post Hibernation Commissioning

12

  Activity Estimated Time (Minutes)

Low Voltage Checkout

POWER ON in PROM mode10Expected PIU-IES Link Resets (Warn RMOC)

EEPROM readout and dump

-----------------------------PAUSE----------------------------------- 102

Transition to EEPROM mode (Science Mode) 10

RAM patch to generate event message indicating counts (see HV below)

Frequency? Ideal desired = 1/s, Post launch commissioning = 1/32s (Discuss with RMOC)

STIM

  -----------------------------PAUSE----------------------------------- 102

High Voltage Checkout

Turn MCP high voltage on (ESA and DEF sweeping disabled) and get sum of counts using event message 15

-----------------------------PAUSE----------------------------------- 102

HV on with ESA sweeping 15

-----------------------------PAUSE----------------------------------- 102

HV on with DEF sweeping 15

Power OFF

  -----------------------------PAUSE----------------------------------- 102

Commissioning Plan

13

Functional Test 1

Power ON in EEPROM (Science) Mode

45Functional test - table and mode changes

(LVSCI and HVSCI)

Power OFF  -----------------------------PAUSE----------------------------------- 102

ELC Channel and MCP Gain Tests

Power ON in PROM Mode

10EEPROM Patch to update housekeeping fields

Memory Dump

Power OFF

Power ON in EEPROM (Science) Mode20RAM Patch for ELC Noisy Channel Test

Noisy ELC Channel Test - HVSCI Mode

MCP Gain Test 120

Power OFF

Functional Test 2Power ON in EEPROM (Science) Mode

30Functional test - table and mode changes

Power OFF  TOTAL TIME 902

Commissioning Plan

MODE TABLES 128s 256s 512s 1024s

Name ( Normal / Burst) Solar Wind at the Comet (N) Full Coverage, Low Res (N) Solar Wind at the Comet (N) Slow Photo-electrons (N)

IONSEnergies 202 to 5156 (Adjacent 4) Full Range + FB (Adjacent 4) 25 to 5400 (Adjacent 4) Full Range + FB (Adjacent 2)

Elevations 0-4, 5-10, 11-15 Adjacent 4 Adjacent 2 0-1,2-4,5-7,8-10,11-13,14-15Azimuths 0,1,2,3-11,12,13,14,15 0,1,2,3-11,12,13,14,15 0,1,2,3-11,12,13,14,15 0,1,2,3-11,12,13,14,15

ELECTRONSEnergies 4 to 811 (Adjacent 4) Full Range + FB (Adjacent 4) 4 to 1225 (Adjacent 3) 4-811, highest (Full Res)

Elevations 0-4, 5-10, 11-15 Adjacent 4 Adjacent 2 Adjacent 2Azimuths Adjacent 2* Adjacent 4* Adjacent 2* 0-1,2-4,5-7,8-10,12-13,14-15

Name ( Normal / Burst) Full Range, Low Res (B) Slow Photo-electrons (B) Pickup, High Res Angular (B) Solar Wind at the Comet (N)

IONSEnergies Full Range + FB (Adjacent 4) Full Range (Adjacent 2) Full Range + FB (Adjacent 4) 25 to 5400 (Adjacent 3)

Elevations Adjacent 2 Adjacent 2 Full Res Adjacent 2Azimuths 0,1,2,3-11,12,13,14,15 0,1,2,3-11,12,13,14,15 Full Res Full res

ELECTRONSEnergies Full Range (Adjacent 4) 4 to 772 (Full Res) 4 to 4202 + highest (Adjacent 3) 4 to 811 (Adjacent 2)

Elevations Adjacent 2 Adjacent 2 Full Res Adjacent 2Azimuths Adjacent 2* Adjacent 2* Full Res* Adjacent 2*

Name ( Normal / Burst) Solar Wind at the Comet (B) Solar Wind at the Comet (B) High Res Angular (B)

IONSEnergies 202 to 5156 (Adjacent 4) 4 to 4901 (Adjacent 3) Full Range + FB (Adjacent 2)Elevations Adjacent 2 Adjacent 2 Full ResAzimuths Full Res Full res Full Res

ELECTRONSEnergies 4 to 3603 (Adjacent 3) 4 to 811 (Adjacent 2) Full Range + FB (Adjacent 2)Elevations Adjacent 2 Adjacent 2 Full ResAzimuths Adjacent 2* Full res* Full Res*

Name ( Normal / Burst) Pickup (B) High Res Energy (B)

IONSEnergies Full Range (Adjacent 2) Full Range (Full Res)Elevations Adjacent 2 Adjacent 2Azimuths 0,1,2,3-11,12,13,14,15 Full Res

ELECTRONSEnergies Full Range (Adjacent 2) Full Range + FB (Full Res)Elevations Adjacent 2 Full ResAzimuths Adjacent 2* Adjacent 2*