landsat status summary...u.s. department of the interior u.s. geological survey landsat science team...

U.S. Department of the Interior

U.S. Geological Survey

Landsat Science Team – Jan 2017

Landsat Status Summary

10 January 2017

Brian Sauer

USGS EROS

[email protected]


Agenda

Landsat 7 Status

Landsat 8 Status

Archive and LGAC Status


Landsat Mission Status

Landsat 7 Acquiring at a rate of ~430 scenes per day with continental acquisition

strategy 105% duty cycle operations for ETM+ performing smoothly

On-orbit performance of Landsat 7 observatory continues to be outstanding No spacecraft or instrument anomalies since October 2014

Finalized end of mission planning – intent to overlap with Landsat 9 launch readiness

Extended mission life potential to as late as July 2021

Landsat 7 error free flight operations for over 4 years and counting

Landsat 8 Acquiring at a rate of ~740 scenes per day

On-orbit performance of Landsat 8 observatory continues to be outstanding;

No spacecraft or instrument anomalies since September 2015

Mission data management highly effective - on-board recorder averaging 70% margin

TIRS Scene Select Mirror (SSM) Encoder Circuit B-side alternative operations concept performing very well

Currently 5 LGN stations and 16 certified IC stations LGS (USGS), GLC (NOAA), NSN (DLR), ASN (GA), and SGS (KSAT)


Almost 18 years of on-orbit operations

Landsat 7 Observatory Status – No Change

15 Nov 1999 - SSR PWA #23 failure

26 Apr 2000 - GXA - ETM+ interaction discovered

11 Feb 2001 - SSR PWA #12 failure

14 May 2002 - EPS Circuit #14 failure

31 Jul 2002 - Gyro 3 motor current spikes

24 Oct 2002 - ETM+ Scan Mirror stops during imaging

31 May 2003 - ETM+ SLC malfunction*

04 Sep 2003 - PDF - FSW timing conflict

05 May 2004 - Gyro 3 Shut down

24 Feb 2005 - RCS Primary heater circuit disabled

16 May 2005 - EPS Circuit #6 failure*

15 Jun 2005 - First of several reduced gyro FSW loads

07 Dec 2005 - SSR PWA #2 failure

01 Feb 2006 - Reduced gyro phase IIa complete

01 Apr 2007 - Switched to ETM+ Bumper mode

28 Mar 2008 - SSR PWA #22 failure

13 Aug 2008 - EPS Circuit #14 recovery

03 Sep 2008 - SSR PWA #23 recovery

25 Apr 2013 - RCS Redundant heater circuit disabled

12 Oct 2013 - SSR PWA #11 failure

27 Sep 2014 - RTC A to RTC B autonomous switchover

18 Oct 2014 - CLOCKGEN prime to redundant autonomous switchover

* Represents a permanent loss of redundancy and/or capability


Landsat 7 Decommissioning Criteria

The primary objective regarding Landsat 7 end of mission planning is to operate Landsat 7 as long as the science mission is viable

Specifically, maximize the 8-day repeat imaging between Landsat 7 and Landsat 8 operations leading up to initiation of Landsat 9 operations

Historic science mission requirement for Mean Local Time (MLT) along the equatorial plane is 10:00 AM plus or minus 15 minutes

Landsat 7 Operational mission will be declared over at the discretion of USGS, and may be triggered by any of the following reasons

1. Insufficient fuel to maintain inclination required for science mission operations The orbital Mean Local Time (MLT) drops below 9:15 AM

Note: Drag Make-Up (DMU) and Risk Mitigation Maneuvers (RMM) activities use minimal amounts of fuel (fractions of a kilogram)

2. Observatory becomes unable, for any reason, to produce useable science data Due to mission ending failures within either the spacecraft or ETM+

3. Key observatory subsystems demonstrate signs of imminent failure which could result in loss of mission Attitude control, propulsion, command & data handling


Approach

Align with L9: Extend Landsat 7 science mission operations as close to Landsat 9 launch as possible

Determine optimized, safe disposal orbit Assessment indicates 8km drop to disposal orbit of

697km

Fuel reserve allows for perigee burn to maximize orbital drag and decay

Conduct one additional inclination maneuver (Delta-I) in February 2017

9:45 AM MLT May 2020

9:30 AM MLT December 2020

9:15 AM MLT July 2021

Lower 8km following crossing of 9:15 AM MLT Or proximity to Landsat 9 launch

Approximately 4.27kg of fuel margin projected


Correlation to Restore L (1 of 2)

USGS is working with NASA on technology demonstration

Landsat 7 is principle client for NASA Restore L

The Landsat 7 End-of-Mission Plan was recently developed with

key points that dovetail into Restore-L mission timeline

Restore L servicing altitude is between 685km to 705km

Servicing day TBD pending clarification of launch date

Latest discussion with Restore L project management indicate most likely

launch no earlier than mid-2020

Anticipated that Restore L servicing day window will overlap with planned

Landsat 7 lowering to disposal orbit (October 2020 through July 2021)

Restore L planning to provide Landsat 7 with 110kg of fuel


Correlation to Restore L (2 of 2)

Refueling Landsat 7 affords USGS the following alternatives: De-orbit Landsat 7 in order to meet or exceed 25 year re-entry policy

Extend science mission operations for enhanced global revisit and comprehensive cross-calibration between Landsat 8 and Landsat 9

Maintain 25 year re-entry

Extend science mission operations in the event Landsat 9 fails to achieve operating capability Maintain 25 year re-entry

2020 2021

Baseline L7 End of

Mission Timeline

L7

Constellation

Exit Move L7 to

Disposal Orbit

Restore-L

Launch

2021 L7

Constellation

ExitMove L7 to

Disposal OrbitLandsat 9

Launch

2020 ~Circa 2111

L7 End-of-Mission

based on MLT

Threshold

Restore-L/L7 Refueling

Mission Timeline Landsat 9 Launch & OIV Post-refuel Landsat 7 Mission


Landsat 7 Acquisitions

Map to the right shows the scheduled

acquisitions from the past year

Upper half is descending; Lower half

is ascending

White = Scheduled for all possible

acquisitions (23 times)

Black = Wasn’t scheduled

Increased duty cycle has enabled

acquisition of about 430 scenes / day

Data not acquired is lost forever!

– Eugene Fosnight


Landsat 8 Observatory Status – No Change

Operational Land Imager

Thermal Infrared Sensor

Propulsion Subsystem

Thermal Control System

Electrical Power System

Attitude Control System

RF Communications

Command & Data Handling System

X-band System

S-band System

Batteries

Solid State Recorder – File Delete (ghost file) errors

- Successfully corrected in September 2015

Solar array

~3 years of on-orbit operations

October 2014 - Side-A SSM Encoder

September 2015 – Encoder Side-B current fluctuations

January 2016 – Alternative Operations Concept B-Side


TIRS B-Encoder Lunar Cal Comparison

TIRS Encoder B-Side alternate operations concept performing better

than expected

Intend to continue with this operational approach indefinitely


Wondering what happened?

TIRS Ground Testing Results NASA ground testing of the TIRS encoder

electronics identified a probable cause for the on-orbit current increases observed in both A and B-side TIRS encoder electronics

Two Multilayer Ceramic Chip Capacitors (MLCCs) found to have cracked due to mechanical or thermal stress during hand solder mounting - Sources of stress include but are not limited to:

Thermo-mechanical stresses (soldering)

Intrinsic stresses and/or micro-cracks from manufacturing

Physical handling

Board flexure or warping after mounting

Healing conditions observed on-orbit not duplicated specifically in ground testing

NASA Code 300 is currently working an issue with hand soldering of MLCCs resulting in cracks

Excellent information for Landsat 9 TIRS II No changes to L8 on-orbit operations anticipated as a

result of ground testing


Landsat 8 Acquisitions

Landsat 8 is tracking close to its 740 scene per

day maximum. Includes special requests and

night imaging

User requests for off-nadir imaging remains

limited


U.S. Landsat Archive Overview (1 November 2016) OLI-TIRS: Landsat 8

855,921 scenes

ETM+: Landsat 7

2,218,700 scenes

TM: Landsat 4 & Landsat 5

2,337,132 scenes

MSS: Landsat 1 through 5

1,300,274 scenes

Total:

6,712,027 scenes


Monthly Downloads

FY09 FY10 FY11 FY12 FY13 FY14 FY15 FY16 FY17

Scenes Delivered 1.1M 2.5M 2.9M 2.7M 4.3M 6.8M 8.8M 17.4M 3.5M

LandsatLook Delivered 112K 301K 823K 2.7M 4.8M 3.2M 0.5M

Cummulative Delivered 1.1M 3.6M 6.6M 9.7M 14.9M 24.2M 37.9M 58.5M 62.5M


Monthly Downloads by Type


Landsat 4-7 TM, ETM+ Collection 1 Downloads

Users primarily accessing pre-collection

Collection Status Discussion Thursday


Landsat Global Archive Consolidation Status

18


0

500,000

1,000,000

1,500,000

2,000,000

2,500,000

3,000,000

3,500,000

4,000,000

4,500,000

Cumulative LGAC Scenes

Cumulative LGAC Status

Previous Science

Team Meeting

Woodcock Metric: 4,069,571 scenes (October 2016)

Previous Metric: 3,745,686 scenes (April 2016)


LGAC Status

Argentina – LTOs

TM and ETM+ data delivery continues

Brazil – HDDTs

USGS to investigate setting up Wideband Video Drive to read

tapes

~875 tapes to be sent by Brazil upon sample tape success

Primarily consist of MSS data, with very small number of TM

intervals also included

Country

(Organization)

Ground

Station

% LGAC

Delivered

% LGAC

Ingested

Argentina (CONAE) COA TM TM

ETM+ ETM+

Australia (GA-NEO) ASA MSS MSS

TM TM

ETM+ ETM+

Australia (GA-NEO) HOA TM TM

ETM+ ETM+

Brazil (INPE) CUB MSS MSS

TM TM

ETM+ ETM+

Canada (CCMEO) GNC MSS MSS

TM TM

ETM+ ETM+

Canada (CCMEO) PAC MSS MSS

TM TM

ETM+ ETM+


LGAC Status

Country

(Organization)

Ground

Station

% LGAC

Delivered

% LGAC

Ingested

China (RADI) BJC TM TM

ETM+ ETM+

China (RADI) KHC TM TM

Ecuador (IEE) CPE TM TM

Europe (ESA) FUI MSS MSS

TM TM

ETM+ ETM+

Europe (ESA) KIS MSS MSS

TM TM

ETM+ ETM+

Europe (ESA) MTI TM TM

ETM+ ETM+

Europe (ESA) MPS MSS MSS

TM TM

ETM+ ETM+

Europe (ESA) NSG ETM+ ETM+

China – Electronic data delivery

Significantly accelerated electronic data delivery in past 6

months

Ecuador – All data has been received

Addressing several problematic tapes

Europe – NAS HDs

Transferring data with 30 TB hard drive

USGS working with ESA to obtain updated metadata lists and

aid in data reconciliation efforts

USGS upgrading LPGS software by end of 2017 to handle

~500,000 TM scenes with missing PCD (Ron Morfitt will

discuss on Thurs)

MSS data delivery pending


LGAC Status

India – Electronic data delivery

MSS data was only available in partially processed Level 1

format

USGS to assess options for data archival and distribution

Newly acquired ETM+ 2016 data delivery pending

Indonesia – All data has been received

DCRSi drive parts needed for remaining tapes

Pakistan – All HDDTs have been received

HDDT reading completed

Delivery of additional TM data on LTOs pending

Russia – All data has been received

Outstanding TM scenes have been received, ingested, and

archived (over 50,000 TM scenes)

Country

(Organization)

Ground

Station

% LGAC

Delivered

% LGAC

Ingested

India (ISRO) SGI MSS MSS

TM TM

ETM+ ETM+

Indonesia (LAPAN) DKI TM TM

ETM+ ETM+

Japan (HIT/HEEIC) HIJ ETM+ ETM+

Japan (JAXA/RESTEC) HAJ MSS MSS

TM TM

ETM+ ETM+

Kyrgyzstan (DLR) BIK TM TM

Mongolia (DLR) ULM TM TM

Pakistan (SUPARCO) ISP MSS MSS

TM TM

Russia (ScanEx) IKR TM TM

Russia (ScanEx) MGR TM TM

Russia (ScanEx) MOR TM TM


LGAC Status

Saudi Arabia – All HDDTs and DLTs have been delivered

MSS and TM data

Data from multiple sensors identified on media

Approval has been received for reading the non-Landsat data

South Africa – Electronic data delivery

Delivery of MSS data pending

Thailand – All data has been delivered

HDDT tape baking, cleaning, reading, and ingest currently in

progress

687 of 1,897 tapes (36%) completed

~100 tapes set aside for further analysis

Country

(Organization)

Ground

Station

% LGAC

Delivered

% LGAC

Ingested

Saudi Arabia (KACST) RSA MSS MSS

TM TM

South Africa (SANSA) JSA MSS MSS

TM TM

ETM+ ETM+

Taiwan (CSRSR-NCU) CLT TM TM

Thailand (GISTDA) BKT MSS MSS

TM TM

ETM+ ETM+

US (U of Puerto Rico) UPR ETM+ ETM+


LGAC Status Summary

• Includes partial scenes

• Green = Completed

4.07 million scenes ingested!

Approximately 62% complete

Approximately 71% of scenes

are new to the archive!

GSID Country Location Scenes Ingested Since Sept. 2010

MSS TM ETM+

Actual Estimated % Comp Unique % Unique Actual Estimated % Comp Unique % Unique Actual Estimated % Comp Unique % Unique

ASA Australia Alice Springs 237,583 237,000 100% 167,213 70% 186,021 186,000 100% 181,883 98% 226,030 226,000 100% 128,469 57%

BIK Kyrgyzstan Bishkek 2,340 2,000 100% 1,749 75%

BJC China Beijing 376,326 560,000 67% 363,958 97% 116 47,000 0% 17 15%

BKT Thailand Bangkok 0 25,000 0% 0 0% 214,836 230,000 93% 194,847 91% 18,704 18,700 100% 8,268 44%

CLT Taiwan Chung Li 11,586 11,600 100% 11,297 98%

COA Argentina Cordoba 103,643 190,000 55% 96,185 93% 137,192 200,000 69% 59,735 44%

CPE Ecuador Cotapaxi 25,246 50,000 50% 12,304 49%

CUB Brazil Cuiaba 0 76,000 0% 0 0% 306,704 307,000 100% 263,745 86% 103,648 103,500 100% 60,157 58%

DKI Indonesia Parepare 17,017 32,000 53% 16,686 98% 59,643 59,500 100% 26,482 44%

FUI Italy Fucino 0 2,000 0% 0 0% 48 567,000 0% 48 100% 20,832 51,000 41% 11,496 55%

GNC Canada Gatineau 53,019 53,000 100% 14,681 28% 37,955 38,000 100% 9,988 26%

HAJ Japan Hatoyama 166,531 166,500 100% 95,712 57% 131,556 131,500 100% 127,107 97% 20,556 20,500 100% 10,667 52%

HIJ Japan Hiroshima 39,365 39,300 100% 15,316 39%

HOA Australia Hobart 5,812 5,800 100% 5,767 99% 13,110 13,100 100% 5,255 40%

IKR Russia Irkutsk 23,431 23,400 100% 23,363 100%

ISP Pakistan Islamabad 504 500 100% 413 82% 63,564 66,000 96% 61,842 97%

JSA South Africa Hartebeesthoek 0 18,000 0% 0 0% 97,946 119,000 82% 84,879 87% 32,157 40,000 80% 9,113 28%

KHC China KaShi 30,681 30,600 100% 29,240 95%

KIS Sweden Kiruna 0 432,000 0% 0 0% 183,508 300,000 61% 180,755 98% 28,592 43,000 66% 17,764 62%

MGR Magadan Russia 2,970 2,970 100% 2,440 82%

MOR Moscow Russia 27,344 27,300 100% 26,613 97%

MPS Spain Maspalomas 0 154,000 0% 0 0% 16,329 50,000 33% 16,329 100% 7,480 32,000 23% 4,099 55%

MTI Italy Matera 2,962 234,000 1% 2,941 99% 12,401 48,000 26% 6,385 51%

NSG Germany Neustrelitz 5,160 5,000 100% 5,130 99% 70,009 94,000 74% 42,200 60%

PAC Canada Prince Albert 427,579 428,000 100% 201,808 47% 369,790 370,000 100% 193,020 52% 100,374 100,000 100% 28,671 29%

RSA Saudi Arabia Riyahd 0 5,000 0% 0 0% 1,608 250,000 1% 860 53%

SGI India Shadnagar 0 12,000 0% 0 0% 38,404 38,400 100% 38,054 99% 10,479 17,000 62% 7,432 71%

ULM Mongolia Ulan Bator 565 565 100% 554 98%

UPR Puerto Rico Mayaguez 315 315 100% 118 37%

Totals 837,357 1,561,000 54% 470,276 56% 2,293,256 3,838,135 60% 1,951,147 85% 938,958 1,190,915 79% 451,632 48%


LGAC Notional Timeline – TM

25

GSID Country Location Actual Estimate % Comp. Unique % Unique

BJC China Beijing 309,976 560,000 55% 300,160 97% Anticipate completion of TM by end of 2017

BKT Thailand Bangkok 210,262 215,000 98% 193,472 92% Anticipate completion of TM data on HDDTs by end of 2018

COA Argentina Cordoba 103,643 190,000 55% 96,185 93% Anticipate completion of TM and ETM+ by mid-2017

CPE Ecuador Cotapaxi 25,246 50,000 50% 12,304 49% Being worked; no anticipated date at this time

DKI Indonesia Parepare 17,017 32,000 53% 16,686 98%Completion of TM data on DCRSi tapes could take some time due to mold

problems on the tapes

FUI Italy Fucino 48 567,000 0% 48 100%

Anticipate completion of 1982-1986 and 2000-2001 all TM data by end of

2017

TM data from 1987-1999 have poor PCD - decision on how to handle this

data is pending

IRK Russia Irkutsk 23,398 23,398 100% 23,353 100% Completed

ISP Pakistan Islamabad 63,564 66,000 96% 61,842 97% Completion of TM data on LTOs unknown at this time

JSA South Africa Hartebeesthoek 97,772 119,000 82% 84,843 87% Anticipate completion of TM data by end of 2016 mid-2017

KHC China Kashi 30,639 30,639 100% 29,240 95% Completed

KIS Sweden Kiruna 183,508 300,000 61% 180,755 98%

Outstanding TM data contains poor PCD (~40% of TM data holdings) -

decision on how to handle data pending (1991-1996)

Completion of poor PCD data by end of 2017

MGR Russia Magadan 2,970 2,970 100% 2,440 82% Completed

MOR Russia Moscow 27,281 27,281 100% 26,554 97% Completed

MPS Spain Maspalomas 16,329 50,000 33% 16,315 100% Anticipate completion by end of 2017

MTI Italy Matera 2,962 234,000 1% 2,941 99% Anticipate completion by end of 2017

RSA Saudi Arabia Riyahd 1,608 250,000 1% 860 53% Completion of TM data on HDDTs could take multiple years

1,116,223 2,717,288 41% 1,047,998 94%

International Cooperator TM Notes / Notional Timeline (highlights are change from Winter

2016 LST meeting)

Totals


Questions???

Following slides include additional download statistics and

additional mission status details

Doesn’t include Collection 1 Distribution Statistics


OLI/TIRS Downloads


ETM+ Downloads


TM Downloads


Landsat 4-5 MSS Downloads


Landsat 1-3 MSS Downloads


Backup Slides


Fuel Status Relevance to End of Mission

FOT flight dynamics estimates that Landsat 7 will need approximately 3.9 kg of fuel to achieve its disposable orbit of 8 km below current orbital trajectory

Following Landsat 7’s final inclination maneuver (delta-I) in February 2017, FOT estimates there will be 8.25 kg of fuel remaining aboard the spacecraft

Very small amounts of fuel are required for needed Drag Makeup Maneuvers (DMU’s) and risk mitigation maneuvers (RMM’s)

Current fuel mass budgeting and MLT of 9:15 AM places Landsat 7 end of mission in mid-2021


L7 WRS Error and MLT


Antarctic and Arctic Off-Nadir Requests

Antarctica (Complete Feb 2016) 6 off-nadir paths 60 degree steps

2 off-nadir paths to cover ends of Transantarctic Mountains

Expect to repeat variation annually

No impact to routine image acquisition

Arctic (Completed Jul-Aug 2016) 1 off-nadir path

Impacts Canada and Scandinavia, but with 8 day ascent & descent revisit time

No impact to routine image acquisition anticipated

landsat status summary...u.s. department of the interior u.s. geological survey landsat science team...

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