# Presentation: 636797

## Landsat Project StatusLandsat Science Team Meeting

**January 2009**
**Presented By:**
**Kristi Kline, PMP**
**Landsat Project Manager, U.S. Geological Survey/EROS**
_**kkline@usgs.gov**_**, (605) 594-2585**

## Satellite Segment

## Landsat 7 Flight Segment

**Attitude Control System**

**X-band System**

**S-band System **

**Performance nominal**

**Enhanced Thematic Mapper +**

**•****5/31/2003 SLC Failure **
**•****4/01/2007 SAM -> Bumper mode**

**Electrical Power System**

_**Batteries:**_

** ****Performance nominal **

**Solid State Recorder**

**Reaction Control System**

**1/07/04 Fuel line #4 thermostat #1a failure.**
**2/24/05 Fuel line #4 thermostat #1b failure**
**Thermostat 2a shows signs of failure**
**No impact to ops; extended plan in place**

_**Solar array:**_

**5/14/2002 Circuit #14 Failure**
**5/16/2005 Circuit # 1 Failure**
**14 circuits remain operating**
**No impact to ops**

**11/15/1999 SSR PWA #23 Loss**
**02/11/2001 SSR PWA #12 Loss**
**12/07/2005 SSR PWA #02 Loss**
**08/02/2006 SSR PWA #13 Loss**
**03/28/2008 SSR PWA #22 Loss**
**Each PWA is ****≈****4% loss of launch capacity**
**Boards are likely recoverable**
**09/03/2006 SSR PWA #23 Recovered**

**Performance nominal**

**•****05/05/2004 Gyro 3 Shut Off**** **
**•****Singe gyro control system **
**     ****in development**

_**9.5 years of on-orbit operations**_

**•****5/31/2003 SLC Failure **

## Space Segment - Landsat 7 Status

**Attitude Control System**
- Inertial Measurement Unit (IMU) Gyros
- Gyro 3 (of 3) shut down due to vibrations in 2005
- Gyros 1 and 2 operating nominally
- Began work on a single-gyro flight capability in 2005
- Have current capability to maintain pseudo-stable flight with maneuver capability with 1 gyro.
- Working with Lockheed-Martin and Honeywell on rate estimator that will provide up to an order of magnitude better performance with greater consistency
- Approach validated on simulator
- Algorithm being refined to fit within in processor capability
- New mathematical approach delivered to flight software for evaluation
- Completed review of simulator estimation code with Ops -- Code is being reviewed for feasibility of implementation by FSW engineer
- Currently evaluating estimator performance sensitivity to spacecraft uncertainties to show estimator performance as a function of the level of knowledge of these spacecraft parameters. Purpose is to identify whether any special calibrations need to be performed by the Ops team to obtain requisite pointing performance using the estimator.
- Solar array torques and momentum
- Vehicle mass properties
- Thruster force and torque
- Gyro bias error

## Space Segment - Landsat 7 Status

**SSR PWA recovery test successfully run Sept 3rd **
- 1 PWA successfully recovered
- 1 PWA unsuccessfully recovered
- Test confirms that all boards likely recoverable following a full SSR power cycling.  (Not recommended unless necessary)
**Delta-Inclination Maneuver completed on October 7th**

## Landsat 5 Flight Segment

**HIGH GAIN ANTENNA**
-  8/85 Transmitter A  failure

**MULTI-SPECTRAL SCANNER**
-  8/95 Band 4 failure

**SOLAR ARRAY DRIVE / PANELS**
-  01/05 Primary Solar Array Drive failure
-  Nominal Solar array panel degradation (12/04)
-  11/05 Redundant Solar Array Drive Malfunction

**COARSE SUN SENSORS**

**GPS ANTENNA**
-  Not Operational

**OMNI ANTENNAS**

**ACS MODULE**
-  07/03 FHST#1 Degradation
-  Skew wheel tack anomaly 10/92
-  11/92 Earth Sensor 1 failure
-  02/02 Earth Sensor 2 failure
-  Intermittent operations possible

**PROPULSION MODULE**
-  3/84 Primary Thruster D failure

**POWER MODULE**
- 05/04 Battery 1 failure /   Removed from power circuits
- 10/07 1 of 22 Cells fails on Battery #2

**THEMATIC MAPPER**
-  10/94 Power Supply 1 stuck switch
-  06/02 TM switched to bumper mode

**WIDEBAND COMM. MODULE**
-  07/88 Ku-band TWTA Prime failure (OCP)
-  07/92 Ku-band TWTA Redundant failure (OCP)
-  08/87 X-band TWTA Prime failure (OCP)
-  03/06 X-band TWTA Redundant Anomaly

**X-BAND ANTENNA**

**DIRECT ACCESS S-BAND**
-  03/94 Side A FWD Power Sensor failure

**COMM & DATA HANDLING MODULE**
- Located back side of s/c

## Space Segment - Landsat 5 Status (Cont.)

**Ranging support for Lunar Reconnaissance Orbiter (LRO) completed successfully**
- Proficiency passes will continue until LRO Launch
**On-board Computer (OBC) Fix uplinked successfully on Sept. 9**
- Fixes an erroneous halt command that could cause safe hold situation
- Halt of the OBC would likely result end of mission
- Same changes made on other mission with similar bus (EUVE, CGRO, and UARS NSSC-1)
**Battery issues**
- Still working on management of power balance between two remaining batteries

## Space Segment - Landsat 5 Status

**Outgassing**
- Requested by calibration/validation team due to reduced gain of the instrument
- Historically, outgassing is performed in conjunction with a Delta-I
- Power issues prevented outgassing with the Delta-I
- Flight Operations will perform outgassing of the instrument after the end-of-year rollover
**Delta-Inclination Maneuver completed on November 5th**
- Plan for three 22-minute burn windows
- Burns more efficient than expected
- Possible additional Delta-I; enough pressure for a partial maneuver next year
**Traveling Wave Tube Amplifier (TWTA) – X-band downlink**
- Unusual start-up profile that began in June returned to normal profile, but at a reduced current (read: good)
- TWTA Helix current remains between 2.7 and 2.8-mA
- Periodic spike, but no “trips”

## Landsat 5 Sun Angle Constraints

**Nominal coverage at summer solstice**
- June 21

## Landsat 5 Sun Angle Constraints

**Landsat 5 Sun Angle Constraints**

**Nominal coverage at equinox**
- March 21
- September 21

## Landsat 5 Sun Angle Constraints

**Nominal coverage at winter solstice**
- December 21

## Ground Segment

## U.S. Landsat Archive Overview(Marketable Scenes through December 31, 2008)

**ETM+: Landsat 7**
- 892,051 scenes
- 828 TB RCC and L0Ra Data
- Archive grows by 260 GB Daily
**TM: Landsat 4 & Landsat 5**
- 780,191 scenes
- 391 TB of RCC and L0Ra Data
- Archive Grows by 40 GB Daily
**MSS: Landsat 1 through 5**
- 652,173 scenes
- 20 TB of Data

## Ground Segment Activities

**Data Capture**
- 10-meter antenna – Completed repairs of S-band feed, install of new High Power Amplifier (HPA), and other maintenance items
- 5.4-meter antenna
- Problem with S-band transmitter (Oct 6); Installed spare part
- Completed Antenna Control Unit (ACU) upgrade (Dec 16)
- Failure of HPA on Dec 15
- Primary unit out for repair
- 10-m Antenna will remain primary until repair of HPA
**Archive**
- Off-site archive
- Continued work on off-site archive tape copies
-  4074/4101 (99.34%) completed
- More tapes shipped to NARA managed limestone cave near Kansas City
- 7 boxes – 10/17/2008
- 2 boxes – 11/25/2008

## Global Land Survey

_**MDA Federal Task Order**_
**GLS2000 processing **
- Completed all reprocessing and validation
**GLS1975, GLS1990**
- Metadata issues resolved
- Two month extension granted to completed reprocessing
- End of FY09 Q1 – all reprocessing should be completed
- GLS1990 data validation near completion
- GLS1975 data received

**GLS2005**
- L7 processing
- Mostly complete
- L5 processing
- Processed North America
- Processed portions of S. America, Europe, and Australia

## GLS2005 Status

## Landsat Global Archive Consolidation

**Discussion with International Cooperators**
- Discussed at LGSOWG in September 2008 with participants
- Positive feedback from most stations
- Need to work details with each station individually
- Working with Canada (CCRS) on prototype delivery via the internet
- Brazil electronically delivered over 500 scenes for GLS2005
- Working on cost estimates for each station
- Discussing prioritization of target data or stations (I.e., get oldest data or at risk data versus easy stations with much data like Canada)

## Web-enabled Schedule

- COMPLETE

## Remaining Issues with Web-enabling

**MSS Processing**
- NLAPS Ground Control Point (GCP) issue
- MSS L1T failure rate and speed
- Processing on LPGS
**L4 TM on LPGS**
**Bulk Server bottleneck and loading issues**
**FTP space for processed products**

## Landsat Data Acquired by Month

## Capture Success Rate (CSR)

**October**
- Landsat 7 – 111 scenes lost from Australia due to equipment failures
- Landsat 7 – 11 scenes lost from Poker Flats due to operator error
**November**
- Landsat 7 – 8 scenes lost from Australia due to equipment failures
- Landsat 5 – 39 scenes lost from Australia due to equipment failures
**LGS (EROS) CSR for FY09**
- Landsat 5 – 100%
- Landsat 7 – 100%

## Landsat Sales by Month

## Total Landsat Data Distribution

## Scenes Processed (ETM+)

## Scenes Processed (TM)

## Scenes Processed (MSS – WRS2)

## Scenes Processed (MSS – WRS1)

## On-Demand Requests (ETM+)

## On-Demand Requests (TM)

## On-Demand Requests (MSS – WRS2)

## On-Demand Requests (MSS – WRS1)

## Downloads through EE/Glovis (ETM+)

## Downloads through EE/Glovis (TM)

## Downloads through EE/Glovis (MSS – WRS2)

## Downloads through EE/Glovis (MSS – WRS1)

## Bulk FTP Downloads

## Web-enabled Customer Demographics(*Does NOT Include Bulk FTP Downloads)

**Web-enabled Customer Demographics****(*Does NOT Include Bulk FTP Downloads)**

***38 of 137 Countries Shown**

*** Stats 10/1/08  through 12/31/08**

## User Reported Primary Use of Landsat (*Since Oct 1)

## User Reported Other Use of Landsat (*Since Oct 1)

## Age of Scenes Downloaded

## Age of Scenes Ordered from Archive

## Age of Scenes Downloaded

## Age of Scenes Ordered from Archive

## Cloud Cover of Scenes Downloaded

## Cloud Cover of Scenes Ordered from Archive

## Daily Processing