Science MissionDirectorate

Program Update from NASA HQRamesh KakarWeather Focus Area LeaderProgram Scientist for TRMM, Aqua and GPM July 14, 2008

Program Update

For a 6+ year old satellite Aqua is in good shape

Dr. Ed Weiler has replaced Dr. Alan Stern as the AA for SMD

Mr. Mike Luther promoted to Deputy AA programs

Get ready for End of Prime Mission Review We need to work with JAXA partners to

participate in the GCOM AO We need to integrate the diverse AMSR-E

algorithms Aqua-wide workshop in June 2009?

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Instrument Status

• AIRS – Nominal Operations All voltages, currents, and temperatures as expected – Another episode of AMSU-A1-2 noisy bus current being higher than usual near the south

pole began in early May, peaked on May 23, and has (at least temporarily) stopped. We had relatively large episodes in 2005 and 2006. The 2007 event was only about half as strong. This 2008 event, if it is truly over, had a peak only about one-third as high as the 2005 and 2006 peaks. It also had a much shorter duration.

• AMSU-A –Except for channel 4, AMSU-A is also healthy, with all voltages, currents, and temperatures as expected.

– An updated Version 5 Level 2 PGE that does not use channel 4 data, but does use all healthy AMSU-A channels, was declared operational at the GES DISC on March 5.

• AMSR-E - ADE Motor Current Torque Increasing – Threshold changed to 4.5 Nm on 07/17/07 - FOT/IOT closely monitoring performance– Preparing for July 16th Meeting with JAXA Team on S/C Fault Management response to

AMSR-E momentum imbalance

• CERES - FM4 instrument shortwave anomaly– No impact to science data products

• HSB – OFF (Survival Mode) • MODIS – Nominal Operations.

– Next MODIS Lunar calibration planned for July 13th

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Fuel Usage

Ascent Maneuvers

Fall 2004 Inclinations

Fall 2006 Inclinations

Spring 2007 Inclinations

Aqua Fuel Usage Comparison

120

140

160

180

200

220

240

5/4/2002 9/16/2003 1/28/2005 6/12/2006 10/25/2007 3/8/2009

Date

Fu

el

Re

ma

inin

g (

Kg

)

Bookkeeping Bookkeeping X TSF PVT(high) PVT(low) Low Limit

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AMSR-E Anomaly(Summary)

• April 2007: Noticeable increase in both the ADE motor current and torque and ADA temperature was observed.

• May 2007: Series of Teleconferences with JAXA & IOT• 6/26/07: Changed Motor Torque Limit from 2.2 Nm to 3.5 Nm• 7/17/07: Changed the threshold to 4.5 Nm• 8/14-16/07: AMSR-E MOWG in Montana

– Reviewed Contingency Procedures for a sudden failure and/or planned shut-down

• 8/28/07: FOT/MD/SIFM teleconference with JAXA & IOT• April 17, 2008: Spike in Motor Torque (see plot)• April 24, 2008: FOT/MD/SIFM TIM

– Reviewed Red-Limit and Contingency responses

– Arranging for teleconference with JAXA/IOT (D&T TBD)

– Continuing to prepare for July meeting with AMSR-E Team

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ADE Motor Current & Torque(Life of Mission – thru 06/04/08)

QuikSCAT experienced similar behavior with its scatterometer antenna bearing assembly – MD obtained copy of the JPL anomaly investigation report – concluded normal wear & tear

Aqua End of Prime Mission Review

Is a technical and scientific assessment by an independent panel of how well the mission met its original science objectives

Documentation of performance and lessons learned

It is an internal SMD/ESD review and not a PM procedural reqmt

A top level summary of schedule and cost performance

Review will be co-chaired by ESD Flight and Research Program Directors

This is a one-time occurrence and documents mission success and achievement whereas the Senior Review is a proposal followed by programmatic evaluation for future operation

Summary

For a 6+ year old satellite Aqua is in good shape

Get ready for End of Prime Mission Review

How do we participate in the GCOM AO?

We need to perform more like a team

Aqua-wide workshop in June 2009?

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