iocp high level plan, 8 september 2009 1 in-orbit commissioning phase: high level planning

1IOCP High Level Plan, 8 September 2009

In-Orbit Commissioning Phase:

High Level Planning


Changes from last issue

- Plan takes into account that 2 Nov 2009 is Monday

- Christmas holidays (from 24-Dec-09 till 2-Jan-10) have been included

- Weeks 24 and 25 have been removed accordingly

- Order of external calibration manoeuvres in Week 2 as proposed by CNES

- LO high rate (2 min) calibration only in Week 4 (lower rate later)

- Additional Dual vs Full-pol mode sky view in Week 7

- FTR Acquisition Criteria have been added

- Timelines for S-band and SADM effects have been added

- Slide number has been added

- Navigation buttons added to go from overall plan to weekly plan and back


Acronyms

IOCP In-Orbit Commissioning Phase

LEOP Launch and Early Orbit Phase

SODAP Switch-On and Data Acquisition Phase


IOCP Main Phases

The In-Orbit Commissioning Phase comprises 4 main phases:

- Launch and Early Orbit Phase (LEOP)

- Switch-On and Data Acquisition Phase (SODAP)

- MIRAS Payload Commissioning

- Pseudo-Operational Phase alternating dual and full-pol modes


IOCP Key Points

Four Key Points are proposed:

- KP0: Decision point to start the MIRAS Payload Commissioning

- KP1: Decision point to start the Pseudo-Operational Phase

- KP2: Decision point to define final calibration strategy

Evaluation of L1 & L2 data product quality, and release to SVRT

- KP3: Decision point to freeze calibration and operational mode


IOCP Main Phases

6 m

onths (27 weeks)

1 week

LEOP

SODAP

PAYLOAD

Dual-Full

Key Point

CW48 CW49 CW50 CW51

CW52 CW01 CW02

CW03 CW04 CW05 CW06

CW07 CW08 CW09 CW10

CW11 CW12 CW13 CW14

CW15 CW16 CW17 CW18

KP1

KP3

PLM Switch ON

LAUNCH

CW53

KP0

CW 45 CW 46 CW 47

XMAS (24-Dec till 2-Jan)

KP2

0

1

2

3


IOCP Main Phases

6 m

onths (27 weeks)

1 week

LEOP

SODAP

PAYLOAD

Dual-Full

Key Point

1 2 3 4

5 6 7

8 9 10 11

12 13 14 15

16 17 18 19

20 21 22 23

KP0

KP2

KP1

KP3

PLM Switch ON

XMAS (24-Dec till 2-Jan)

LAUNCH

5X

0

1

2

3


IOCP Time Line

The proposed IOCP time line features:

- Inclusion of all activities described in the Commissioning Plan

- Early generation of the first image (start of L1OP)

- Cold sky views (preceded by long calibration) every Tuesday

- Early start of pseudo-operational phase

- Quite regular weekly pattern

- Minimisation of instrument mode changes

- Evaluation of L1 & L2 data product quality, and release to SVRT by KP2

- Key Points on Wednesdays


IOCP Detailed Time-line

6 m

onths (27 weeks)

1 week

LEOP

SODAP

Default Mode

Dual Pol

Full Pol

Cold Sky View

Long Calibration

First Image

Thermal Stability

Electrical Stability

Key Point

LAUNCH

XMAS

1 2 3 4

5 6 7

8 9 10 11

12 13 14 15

16 17 18 19

20 21 22 23

5X

0

1

2

3


Summary of Cold Sky Views

Week Pointing Duration Target Mode Purpose

2

Inertial 2 min Galactic PolePlain Dual

Platform commissioning

Inertial 30 min Galactic PolePlain Dual


Zenith 1.1 orbit One full sky circlePlain Dual


3

Zenith 1.1 orbit One full sky circle Dual S-band RFI

Inertial Standard Galactic Pole Dual FTR Dual + NIR

Zenith 1.1 orbit One full sky circle Dual S-band RFI

4Inertial Standard Galaxy at boresight Dual Accuracy

Inertial Standard Galactic Pole Dual SADM

FTR is valid FTR is not valid – need for DPGS “manual” orchestration



Week Pointing Duration Target Mode Purpose

5 Inertial Standard Moon in AF-FoV Dual X + S + STR RFI

6 Inertial Standard Galactic Pole Full FTR Full + NIR

7 Inertial Standard Galactic Pole Dual Dual vs Full

8 Inertial Standard Galactic Pole Dual NIR leakage

9 Inertial Standard Galactic Pole Dual FTR Dual + NIR

10-14-18-22 Inertial Standard Galactic Pole Full FTR Full + NIR

11-15-19 Zenith 1.1 orbit One full sky circle Dual NIR

12-16-20 Zenith 1.1 orbit One full sky circle Dual NIR

13-17-21 Inertial Standard Galactic Pole Dual FTR Dual + NIR

23 Zenith 1 half orbit Moon traversing AF-FoV Dual E2E Verification

FTR is valid FTR is not valid – need for DPGS “manual” orchestration



6 m

onths (27 weeks)

1 week

Inertial < 1orbit FTR

Key Point

1 2 3 4

5 5X 6 7

8 9 10 11

12 13 14 15

16 17 18 19

20 21 22 23

Zenith Verifications

Zenith 1.1 orbit NIR

Inertial < 1orbit Verifications

LAUNCH

XMAS

0

1

2

3


First Calibration Time Line

Week Activity Output Calibration Progress

3

Long Calibration

PMS

FwF(0)

FwF shape

U-offsets

• LICEF calibration• FwF calibration

• Offset calibration (common LO)

External CalibrationFTR

(dual pol)

• Antenna Patterns Validation• Flat Target Response in Dual

• NIR calibration• Cold Sky LICEF calibration

Plain Dual Pol + LO cal LO phase

• LO phase time evolution


First Calibration Time Line

Week Activity Output Calibration Progress

4 - 5 Electrical Stability

Variation of:

PMS

FwF(0)

FwF shape

U-offsets

over temperature

• LICEF calibration• FwF calibration

• Offset calibration (common LO)

All above over temperature

DUAL POL MODE FIRST CALIBRATION COMPLETED

6 External CalibrationFTR

(full pol)• Flat Target Response in Full

FULL POL MODE FIRST CALIBRATION COMPLETED


First Calibration Time-line

L1PPL1PP start

L1L1OP start

DDual pol first calibration completed in

Week 5

F Full pol first calibration completed in

Week 6

DPGS L1+L2+BUFR

6 m

onths (27 weeks)

1 week

1 2 3 4

5 6 7

8 9 10 11

12 13 14 15

16 17 18 19

20 21 22 23

LAUNCH

XMAS

5X

L1PP

L1+DPGS

D F

0

1

2

3


PLM Switch ON

LEOP

LEOP comprises the launch, orbit injection and platform commissioning.

During LEOP the payload is OFF (except for a short partial switch-on just before antenna deployment).

LEOP is expected to be less than 2.5 weeks long.

LEOP is described in Section 4.1 of the Commissioning Plan.

Payload is switched on in Day 14 of LEOP.

LAUNCH


SODAPWeek 1 Week 2 Week 3

SODAP comprises the RF Link Test, the ESAC MINI Test and the Svalbard MINI Test, each one 1 week long.

During SODAP the payload is ON.

SODAP comprises the first 3 weeks after LEOP.

First two weeks include also some Platform Commissioning activities.

SODAP is described in Sections 4.2 through 4.5 of the Commissioning Plan.

Key Point 0: decision to start the MIRAS Payload Commissioning / first pointing correction estimation (geolocation estimate) / first L1-L2 collocation / DPGS working up to level L1 (dual) and L2 /

0


SODAP ActivitiesWeek 1 Week 2 Week 3

SODAP activities have been defined by the SODAP team.

It is proposed to attempt a first long cal, external calibration to get the Flat Target Response (section 4.6.4) and first image acquisition (section 4.6.6), all in dual-pol, at Week 3, and if failed, at Week 4.

A correlator test will precede those attempts (section 4.6.2).

For the image acquisition dual-pol with LO calibration is needed.

During SODAP L1PP shall concentrate on the identified areas (Madagascar, Mid-Pacific Ocean…).

0


Week 1LEOP Week 1 Week 2

Day 14 of LEOP: Payload Switch ON

Plain Full Pol

MON TUE WED THU FRI SAT SUN


Week 2Week 1 Week 2 Week 3

Galactic Pole – Inertial 30’

Flip-over

Plain Full Pol


Zenithal 110’

Inertial 2’

Plain Full Pol

0



Galactic Pole – Inertial

(FTR in Dual Pol and NIR)

Long Calibration

Correlator Test

Plain Full Pol (+ LO Cal )


Key Point 0

First Image Opportunity

S-band check - ZenithS-band check - Zenith

0

0


MIRAS Payload Commissioning

The MIRAS Payload Commissioning phase comprises the characterisation, calibration, validation and verification of the instrument.

This phase comprises the first 5.5 weeks after SODAP, plus 1 week holidays (Week 5X).

This phase is described in Sections 4.6 and 4.7 of the Commissioning Plan.

4

5 6 7

8 9

XMAS

5X

1



Week 4 is the start of the MIRAS Payload Commissioning

Activities:

- Correlator Test, if failed in previous attempt (section 4.6.2)

- Thermal stability: instrument in default mode (section 4.6.1)

- Long Calibration orbit

- External Calibration targeting the Galaxy in inertial pointing, to assess the absolute accuracy of MIRAS.

- First image opportunity, if failed in previous attempt (section 4.6.6)

- Electrical stability (section 4.6.3) including U-noise injection (section 4.6.24)

- In-between activities, the instrument is in Default Mode (see next slide)

- External Calibration to assess impact of SADM

XMAS0


Default Mode Definition

Default Mode definition:

- Dual-pol mode

- LO calibration including U-noise (6 epochs):

Week 4 - every 2 minutes (100 epochs)Week 5 and onwards – TBD minutes (based on Week 4 analysis)

- Short cal (29 epochs): every 2.5 hours (7500 epochs) TBC

-Long cal (4996 epochs): every 2 days (144000 epochs)



Thermal Stability

Default

ModeElectrical Stability

Long Calibration

Galaxy – Inertial

(absolute accuracy)

Correlator Test


First Image Opportunity

SADM

XMAS0


Week 5Week 4 Week 5 Week 5X

Activities:



- External Calibration to check RFI from X and S-band (section 4.6.13), and STR RFI, in parallel targeting the Moon in inertial pointing (section 4.7.4)

XMAS


Week 5Week 4 Week 5 Week 5X

Default Mode


Long Calibration

Moon – Inertial

(X, S, STR RFI)


XMAS

XMAS


Week 5XWeek 5 Week 5X Week 6

This week is part of the Xmas holidays.

Activities:

- Instrument in Default Mode

XMAS


Week 5X

Default Mode


XMAS

Week 5 Week 5X Week 6

XMAS


Week 6Week 5X Week 6 Week 7

Activities:

- All-LICEF test (section 4.6.22)


- External Calibration with Galactic Pole, inertial pointing, Full-pol (section 4.6.7)

- Early Full-pol mode (section 4.6.8)

- Electrical stability check

- NIR 3rd and 4th Stokes parameters verification

XMAS



Default Mode

Long Calibration


(FTR in Full Pol and NIR)

Full Pol Mode


All-LICEF

L E

N

NIR Stokes



Activities:

- Early Full-pol mode (section 4.6.8)


- External Calibration with Galactic Pole, inertial pointing, Dual vs Full-pol


Note: long calibration and external calibration are performed twice to better assess dual vs full-pol performances.

1



Full Pol Mode

Long Calibration


(Dual vs Full Pol)

Default Mode


E

Long Calibration


(Dual vs Full Pol)

Default Mode

1



Activities:


- External Calibration with Galactic Pole, inertial pointing, to check NIR leakage (section 4.6.21)


- Key Point 1 main issues:

a) calibration rate for LO and Short

b) start of pseudo-operational phase (alternating Dual and Full-pol)

c) preliminary assessment of LICEF PMS Cold Sky calibration

d) first geolocation correction matrix

e) first accuracy estimate of L1 and L2 (dual and full)

1




Default Mode

Long Calibration


(NIR leakage)

Default Mode

Key Point 1

E

1

1



Activities:

- NIR PMS Calibration (section 4.6.23)


- External Calibration with Galactic Pole, inertial pointing, Dual-pol

- Dual-pol mode with nominal rate of LO and Short calibration


1




Default Mode

Long Calibration



Dual Pol Mode

NIR PMS

N E

1


Weeks 10, 14, 18, 22

Activities:



- External Calibration with Galactic Pole, inertial pointing, in Full-pol

- Full-pol mode with nominal rate of LO and Short calibration


Weeks 10, 14, 18, 22

Dual Pol Mode

Long Calibration


(FTR in Full Pol and NIR)

Full Pol Mode


Week 10


Weeks 11, 15, 19

Activities:



- External Calibration, NIR 1.1 orbit, zenith pointing



Weeks 11, 15, 19


Long Calibration

1 Full Orbit Zenith Pointing

(NIR)

Dual Pol ModeFull Pol Mode

Week 11


Weeks 12, 20

Activities:



- External Calibration, NIR 1.1 orbit, zenith pointing



Weeks 12, 20


Long Calibration


(NIR)

Full Pol ModeDual Pol Mode

Week 12


Weeks 13, 17, 21

Activities:



- External Calibration with Galactic Pole, inertial pointing, Dual-pol



Weeks 13, 17, 21


Long Calibration

Galactic Pole - Inertial


Dual Pol ModeFull Pol Mode

Week 13


Week 16

Activities:

- Key Point 2 (week 16) main issues:

a) confirmation of calibration rate for LO and Short

(compatible with a 6 day full coverage for SM)

b) preliminary assessment of Dual and Full-pol

c) in-depth analysis of Dual and Full at levels L1 and L2 leading to

the evaluation of L1 & L2 data product quality, and release to SVRT

d) decision on LICEF PMS Cold Sky calibration (impacts L1OP)

Week 15 Week 16 Week 17

2


Week 16


Long Calibration


(NIR)

Full Pol ModeDual Pol Mode

Key Point 2


2

2


Week 23

Activities:



- External Calibration targeting the Moon in zenith pointing, Dual-pol


- Key Point 3 main issues:

a) confirmation of calibration rate for Cold Sky and Long Calibration

b) final assessment of Dual and Full-pol

c) preparation for the decision to go into the operational phase

Week 22 Week 23

Operational

Week 24

3



Full Pol Mode

Long Calibration


Week 24

Moon – Zenith Pointing


Operational

Key Point 3

3

3


Criteria for FTR Acquisition

Necessary Criteria:

1.- Minimum sky brightness temperature (ensures maximum contrast)

2.- Minimum sky rms brightness temperature (ensures maximum uniformity)

3.- Sun behind antenna plane or eclipsed by Earth (minimises Sun contamination)

4.- Antenna beam away from equatorial plane (minimises RFI from other satellites)

Criteria which can be relaxed to some extent if not fulfilled:

5.- Moon behind antenna plane (minimises Moon effects)

Criteria which are recommended but subject to investigation:

6.- FTR acquisition while over ocean (should reduce backlobe contamination)


S-band RFI Test Timeline

1 2 3 4 5 6 7 8 9 10 11 time

1.1 orbit (zenith) = 11 x 2 x 5 minutes

5 min2x5 min

OFF

ON

OFF


SADM Effects Test Timeline

+5

time

Flat Target Acquisition (inertial pointing) = 740 epochs = 8 x 111 s

5

00 0

ETO time

(External Target Observation):

at ETO time, boresight = zenith

111 s

222 s

222 s

111 s

222 s

SADM angle

iocp high level plan, 8 september 2009 1 in-orbit commissioning phase: high level planning

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