# Presentation: 388063

## EOS Terra and AquaMission Operations Status October 3, 2005

**Angelita (Angie) C. Kelly**
**Science Interface Manager**
**Earth Science Mission Operations (ESMO) Project**
**NASA/Goddard Space Flight Center**
**phone 301-614-5317**
**     ****fax 301-614-5270**
_**[angelita.c.kelly@nasa.gov](mailto:angelita.c.kelly@nasa.gov)**_

**International EOS/NPP Direct Readout Conference**
**Benevento, Italy**

*Note: Presentation material based on data from the EOS Flight operations Team (Bill, Guit, Eric Moyer, John Nidhiry, and Jamie Pawlowski)*

## Topics

**Introduction**
**Earth Science Mission Operations Project**
**DB Operations**
**Terra**
**Overall Summary**
**Major Activities/Maneuvers Completed in 2005**
**Planned Activities**
**MODIS Operations**
** **
**Aqua**
**Overall Summary**
**Major Activities/Maneuvers Completed in 2005**
**Planned Activities**
**MODIS Operations****  **

## The Earth Science Mission Operations (ESMO) Project/Code 428 at NASA Goddard Space Flight Center (GSFC) is responsible for  mission operations of EOS Terra, Aqua, and Aura, and other Earth Science missions, e.g., UARS, TRMM.
Earth Radiation Budget Satellite (ERBS) --- 10/05/84
Upper Atmosphere Research Satellite (UARS) --- 09/12/91
Total Ozone Mapping Spectrometer Earth Probe (TOMS-EP) --- 07/02/96
Tropical Rainfall Measuring Mission (TRMM) --- 11/27/97
Landsat-7 --- 04/15/99  (USGS: M&O & NASA: Anomalies)
Earth Observing System (EOS) Terra --- 12/18/99
EOS Aqua--- 05/04/02
Ice, Clouds, and Land Elevation Satellite (ICESat) --- 01/12/03
Solar Radiation and Climate Experiment (SORCE) --- 01/25/03
EOS Aura --- 7/15/2004

ESMO coordinates with the EOS science teams and the GSFC Direct Broadcast (DB) community to satisfy user requirements.

**Earth Radiation Budget Satellite (ERBS) --- 10/05/84**
**Upper Atmosphere Research Satellite (UARS) --- 09/12/91**
**Total Ozone Mapping Spectrometer Earth Probe (TOMS-EP) --- 07/02/96**
**Tropical Rainfall Measuring Mission (TRMM) --- 11/27/97**
**Landsat-7 --- 04/15/99  ****(USGS: M&O & NASA: Anomalies)**
**Earth Observing System (EOS) Terra --- 12/18/99**
**EOS Aqua--- 05/04/02**
**Ice, Clouds, and Land Elevation Satellite (ICESat) --- 01/12/03**
**Solar Radiation and Climate Experiment (SORCE) --- 01/25/03**
**EOS Aura --- 7/15/2004**
**ESMO coordinates with the EOS science teams and the GSFC Direct Broadcast (DB) community to satisfy user requirements.**

**EOS Mission Operations**

## EOS End-to-End Data System

## Direct Broadcast (DB) Operations

**The Terra and Aqua satellites provide 15 Mbps X-Band DB data to users worldwide.**
**DB is provided continuously except when the satellite is:**
- Configured for a TDRSS or Ground Network (GN) contact and
- Performing a 150 Mbps K-Band (Terra) or X-Band (Aqua) playback.
**The Aqua Flight Operations Team (FOT) maximizes DB operations by:  **
- Delaying activation of the GN configuration by 60 seconds for the NW continental U.S.
- Commanding the X-Band Modulator to 15 Mbps Direct Broadcast Mode after each X-Band Playback .
- Scheduling Wallops Ground Station (WGS) to receive only 1 Aqua pass and only during 0h-12h.

## Important Web Sites

| Terra
schedule  | http://directreadout.gsfc.nasa.gov/index.cfm?section=missions&page=terraMission | Go to “X-band Turn-off Times” |
| --- | --- | --- |
| Aqua
schedule | http://directreadout.gsfc.nasa.gov/index.cfm?section=missions&page=aquaMission | Go to “Aqua X-Band Downlink Schedule” |
| System
Status | http://jupiter02.gsfc.nasa.gov:591/sysstat/   | Contact mss@eos.nasa.gov to obtain access |

**Important Web Sites**

## Earth Science Constellations

***Afternoon Constellation***

***Morning Constellation***

## Terra Status

## Terra Flight System Status Summary

**Terra Flight System ****Status Summary**

**1 – SFE/KSAM data clock synchronization was lost on May 5****th****, 2005.  **
**2 – TCS TIR CPHTS temperature fluctuation on July 5****th****, 2005.  Returned to normal.**
**3 – SSR PWA 28 (Supersets 54 & 55) Failure due to over-current protection on August 26****th****, 2005.**
**4 – SFE-A LPM Card SEU (Tripped TMON 16) on September 23****rd****, 2005 at 14:36:17z. **

|  | Terra Subsystem Status for 2005 |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
|  | January | February | March | April | May | June | July | August | Sept |
| CDH | Green | Green | Green | Green | Green | Green | Green | Yellow3 | Yellow4 |
| COMM | Green | Green | Green | Green | Yellow1 | Green | Green | Green | Green |
| EPS | Green | Green | Green | Green | Green | Green | Green | Green | Green |
| FSW | Green | Green | Green | Green | Green | Green | Green | Green | Green |
| GNC | Green | Green | Green | Green | Green | Green | Green | Green | Green |
| NAV | Green | Green | Green | Green | Green | Green | Green | Green | Green |
| TCS | Green | Green | Green | Green | Green | Green | Yellow2 | Green | Green |

## Terra Instrument Status Summary

**Terra Instrument ****Status Summary**

**1 – CERES AFT was intentionally commanded to a stowed configuration on July 1****st**** to help understand degradation rate on the Terra & Aqua CERES instruments.  Returned to normal operations on September 1****st****.**

|  | Terra Instrument Status for 2005 |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
|  | January | February | March | April | May | June | July | August | Sept |
| ASTER | Green | Green | Green | Green | Green | Green | Green | Green | Green |
| CERES | Green | Green | Green | Green | Green | Green | Green1 | Green1 | Green |
| MISR | Green | Green | Green | Green | Green | Green | Green | Green | Green |
| MODIS | Green | Green | Green | Green | Green | Green | Green | Green | Green |
| MOPITT | Green | Green | Green | Green | Green | Green | Green | Green | Green |

**Percentage data capture for fiscal year (Oct 1, 2004 – 9/30/05)  =   99.85%**

## Terra Spacecraft Major Activities in 2005

**Terra Spacecraft ****Major Activities in 2005**

**   **

- Jan 30 - 	Successfully completed –4.9 degree MODIS Roll Maneuver
- Feb 17 - Uplinked EPGN RTCS Modifications (corrected Inhibit-ID)
- Feb 22 - Successfully completed a 10 sec Drag Make Up Maneuver (2nd attempt; 1st attempt planned for 2/15/05 waived off due to Backup FDS Hardware Failure).
- Feb 28 - Successfully completed –16.99 degree MODIS Roll Maneuver
- April 8 - 	Solar Eclipse (No Impact)
- June 9 - 	Successfully performed 10.127 second Drag Make Up Maneuver
- June 25 - Successfully performed –15.667 degree MODIS Roll Maneuver
- July 1 - CERES AFT configured to stow instrument for 2 months
- July 25 - Successfully performed –7.245 degree MODIS Roll Maneuver
- Aug 23 - Successfully performed –6.81 degree MODIS Roll Maneuver
- Aug 26 - Recovered from SSR PWA 28 Anomaly
- Sept 15 - Successfully performed 7.936 second Drag Make Up Maneuver
- Sept 22 - Successfully performed -12.467 degree MODIS Roll Maneuver
- Sept 23 - Responded to and Recovered from SFE-A Anomaly

## Terra Spacecraft Upcoming Activities  

**Terra Spacecraft ****Upcoming Activities****  **

**   **

- Oct 3 - Solar Eclipse (No impact expected.
- Oct 21 -15.06 degree MODIS Roll Maneuver
- Nov/Dec - Three Inclination Maneuvers
- Dec 31 - Leap Second
- Dec/Jan- Load Thruster Gain Change to improve Thruster responsiveness.

## Significant Data Anomalies

**On May 5th, 2005 at 125/08:24:54z, the SFE-A lost data clock synchronization with the K-Band Single Access Modulator **
- Terra was near the SAA at time of sync loss.
- WSC could not lock on science data being downlinked via K-Band.
- Synchronization was regained at 10:03:48z
- Same problem previously occurred on September 4th, 2004
**SSR PWA 28 Failure – Over-current Protection on 8/26/05.**
- Occurred at approximately 238/12:00:00.  Near North Pole Nadir Term Crossing into Day.
- Affected MODIS Buffer(Supersets 54 & 55); Moved affected Supersets to “Bad”List on 8/26/05
- Similar symptoms as other PWA Failures
- SSR Data Module Unit (DMU) Recycle could potentially reset all failed PWAs and allow continued use
**SFE-A LPM Card Anomaly (SFE-A Off) on 9/23/05.****  **
- Anomaly occurred at 266/14:36:17 while in the South Atlantic Anomaly
- Onboard software turned off SFE-A. No science was recorded or transmitted
- Successfully recovered SFE-A; started capturing science at 266/19:46:37.
- Direct Broadcast restarted at 266/20:40:05.

## MODIS Operations on TERRA

**September 2004 – September 2005**

## Terra MODIS Calibrations

**SRCA calibrations conducted on a regular basis. **
- Only anomaly was on the one 10w special calibration on DOY 327.
**SDSM and Blackbody calibrations conducted biweekly.**
- No anomalies.
**Lunar Calibration Rolls conducted monthly**
- When the roll angle necessary is below 20 degrees.

## Terra MODIS Anomaly

**On November 22, 2004, DOY 327, during a special 10W SpectroRadiometric Calibration Assembly (SRCA) calibration, the SRCA failed.**
**Lamp #2 was being used for this calibration. **
- Lamp #2 had been showing inconsistencies
- Replaced by lamp #4 for normal SRCA calibrations.
**The probable cause for the premature shutdown was the filament burning out. MODIS decided to not try to turn the lamp back on, since there was a spare lamp available.**

## Terra MODISLunar Calibrations

**From September 2004 to September 2005 MODIS completed nine Lunar Calibrations on TERRA. All were successful.**
**#47 - Oct.01, 2004**
**#48 - Nov. 02, 2004**
**#49 - Dec. 31, 2004**
**#50 - Jan.30, 2005**
**#51 - Feb. 28 2005**
**#52 – June 26, 2005**
**#53 – July 25, 2005**
**#54 – August 23, 2005**
**#55 – September 22, 2005**

## AQUA STATUS

## Summary

**Spacecraft Status - ****GREEN**
**Instrument Status - ****GREEN**
**AMSR-E, AIRS, AMSU, CERES & MODIS: **
**Operations nominal – Producing great science**
**HSB: Survival Mode since 2/5/2003**
**Data Capture/L0 Processing Status – ****GREEN**
**SSR Data Capture to 06/30/2005:  ****	****99.994466 %**
**SSR Data Capture to 07/31/2005:****	****99.989391 %**
**Data Latency – Excellent**
**Ground Systems – Performing well and are meeting and/or exceeding requirements **

## Spacecraft Subsystem Status Summary

| System | Status 2005 |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
|  | January | February | March | April | May | June | July |
| C&DH | GREEN | GREEN | GREEN | GREEN | GREEN | GREEN | GREEN |
| COMM | GREEN | GREEN | GREEN | GREEN | GREEN | GREEN | GREEN |
| EPS | GREEN | GREEN | GREEN | GREEN | GREEN | GREEN | GREEN |
| FSW | GREEN | GREEN | GREEN | GREEN | GREEN | GREEN | GREEN |
| GN&C | GREEN | GREEN | GREEN | GREEN | GREEN | GREEN | GREEN |
| PROP | GREEN | GREEN | GREEN | GREEN | GREEN | GREEN | GREEN |
| TCS | GREEN | GREEN | GREEN | GREEN | GREEN | GREEN | GREEN |

## Major Activities in 2005

**Feb 2****nd**** ****	****– Star Tracker #1 Time Tag Error Patch**
**Feb 8-9****th**** ****	****– ****CALIPSO Flight Ops Review @ LaRC**
**Feb 10-11****th**** ****	****– ****Afternoon Constellation MOWG @ LaRC**
**Mar 19****th**** ****	****– ****EPS State of Health (SOH) Test #3**
**Mar 30****th**** ****	****– CERES Instrument Anomaly**
**Apr 8****th**** ****	****– ****Solar Eclipse # 7 (No Impact)**
**Apr 11****th**** ****	****– ****SGS Declared RED**** **
**Apr 14****th**** ****	****– ****AGS Declared RED**
**May 4****th**** ****	****– Aqua 3-Year Anniversary**
**May 11****th**** ****	****– ****Drag Makeup Maneuver #21 waved off**
**May 13****th**** ****	****– Drag Makeup Maneuver #21**
**May 17****th**** ****	****– MODIS Instrument Anomaly (see following charts)**
**Jun 28****th**** ****	****	****– ****CALIPSO Delta FOR @ LaRC**
**Jul 6-7****th**** ****	****	****– ****CloudSat ORR @ KAFB**
**Jul 19-20****th**** ****	****– ****CALIPSO/CloudSat TIM @ GSFC**
**Jul 21-22****nd**** ****	****– ****AC MOWG @ GSFC**
**Jul 25****th**** ****	****	****– EPS Working Group Meeting #4**
**Jul 28****th**** ****	****	****– SGS Re-certified **
**Aug 16-18****th**** ****	****– ****CALIPSO ORR @ CNES**
**Sep 12-16****th**** ****	****– ****CS/CP/ESMO/CCS Joint OR Exercise**

## Planned Activities

**October 3****rd**** ****	****–****	****Solar Eclipse #8**
**Oct 9-11****th**** ****	****–****	****CloudSat/CALIPSO Orbit Ascent**
**Sep 29****th**** ****	****–****	****CloudSat/CALIPSO NET OCT 26**
**December 31****st**** ****	****– ****	****Leap Second**
**TBD ****	****–****	****HSB Turn-On Test #14**

## MODIS Operations on AQUA

**September 2004 – September 2005**

## MODIS SRCA Anomaly:
May 17th at 137/01:07:30 GMT 
During the 20W portion of the SRCA full spatial calibration 
Abnormal output from the calibration lamps 
June 28 2005, DOY 179
MODIS conducted tests to determine which SRCA lamp had failed on DOY 137.
Determined that 10 W lamp #3 had failed.
Failure Review Board Formed to Investigate. 
Determined cause of the failure due to hot spot
Similar to samples in pre launch testing. 
MODIS IOT has built new SCS’s 
Conduct the SRCA calibrations without lamp #3
September 26 2005, DOY 269.
Conducted successful 20W radiometric calibration
The impact to science data has been minimal
SRCA data is used primarily for trending 
Not as an active calibrator.

- May 17th at 137/01:07:30 GMT
- During the 20W portion of the SRCA full spatial calibration
- Abnormal output from the calibration lamps
**June 28 2005, DOY 179**
- MODIS conducted tests to determine which SRCA lamp had failed on DOY 137.
- Determined that 10 W lamp #3 had failed.
**Failure Review Board Formed to Investigate. **
- Determined cause of the failure due to hot spot
- Similar to samples in pre launch testing.
**MODIS IOT has built new SCS’s **
- Conduct the SRCA calibrations without lamp #3
**September 26 2005, DOY 269.**
- Conducted successful 20W radiometric calibration
**The impact to science data has been minimal**
- SRCA data is used primarily for trending** **
- Not as an active calibrator.

**MODIS Instrument Anomaly**

## MODIS SRCA Usage

**Previous SRCA calibration frequency**
**Full Radiometric performed monthly**
**10W Radiometric performed monthly (Terra only)**
**Full Spatial performed bimonthly**
**Full Spectral performed quarterly  **
**New SRCA calibration frequency**
**Full Radiometric performed monthly**
**10W Radiometric will no longer be performed**
**Full Spatial performed quarterly**
**Full Spectral performed 3 times a year**

## Calibrations

**DOY 137 to 296 **
**SRCA calibrations to continue **
- Were halted while the anomaly was under investigation
**SDSM and Blackbody calibrations continue biweekly **
**No anomalies.**
**Calibrations conducted quarterly**
**No anomalies.**
**Lunar Calibration Rolls conducted monthly **
**When the roll angle below 20 degrees.**

## MODIS Lunar Calibrations

**September 2004 to September 2005**
**MODIS completed nine Lunar Calibrations on AQUA**
- All were successful.
**#22 - Oct.23, 2004**
**#23 - Nov. 22, 2004**
**#24 - Dec. 21, 2004**
**#25 - Jan.20, 2005**
**#26 - Feb. 18 2005**
**#27 - March 21, 2005**
**#28 - April 19, 2005**
**#29 - May 19, 2005**
**#30 - June 17, 2005**

## Aqua Maneuvers - 2005

**Drag Make-Up Maneuvers:**
**Jan 12****th****	****–****	****DMUM # 19**
**Mar 9****th****	****–****	****DMUM # 20**
**May 13****th****	****–****	****DMUM # 21**
**Aug 3****rd**** ****	****–****	****DMUM # 22**
**MODIS Lunar Calibration Maneuvers:**
**Jan 20****th**** ****	****–****	****MODIS LCM # 25**
**Feb 19****th**** ****	****–****	****MODIS LCM #26**
**Mar 21****st**** ****	****–****	****MODIS LCM # 27**
**Apr 19****th**** ****	****–****	****MODIS LCM # 28**
**May 19****th****	****–****	****MODIS LCM # 29**
**Jun 18****th**** ****	****–****	****MODIS LCM # 30 **

## Acronym List