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EOS Aqua

EOS Aqua. AMSR-E Performance Status MOWG Meeting September 23, 2014 Huntsville, Alabama. Byron Graves Aqua Instruments Engineer Aqua/Aura Flight Operations Team phone 301-614-5761 Byron.Graves@nasa.gov. AMSR-E Status. Performance Update. EOS Aqua FOT September 24 th , 2014.

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EOS Aqua

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  1. EOS Aqua AMSR-E Performance Status MOWG MeetingSeptember 23, 2014Huntsville, Alabama Byron Graves Aqua Instruments Engineer Aqua/Aura Flight Operations Team phone 301-614-5761 Byron.Graves@nasa.gov AMSR-E MOWG - September 2014

  2. AMSR-E Status Performance Update EOS Aqua FOT September 24th, 2014

  3. Background • Spun-down on Oct. 4th 2011 due to excessive Torque • Sept. 19th/20th 2012, 6 trial run-up to 4rpm were conducted, though antenna started rotation only reached around 1 rpm. • On Dec. 4th2012, command operation for the low speed(2rpm) rotation restart was carried out. Following fluctuations in rotation rate, the rotation became stable at 2rpm. AMSR-E MOWG - September 2014

  4. Stable Rotation Calibrations • Five gain offsets control and error flag clear have been conducted. • January 30th 2013 23GHz (H polarized wave) • July 18th 20136GHz (V polarized wave) and 23 GHz (H polarized wave) • September 6th 201389GHz (B-side V-polarized wave) • February 7th 20146GHz (V polarized wave) and 23 GHz (H polarized wave) • June 5th 2014 89 GHz (B-side V-polarized wave) AMSR-E MOWG - September 2014

  5. Torque & CurrentFive Year Performance

  6. Stage III ADA Torque & Motor Current March Peak Lowest consistent averages since 2009

  7. Month of August

  8. Life-Time Average Temperatures

  9. Stage IIIRotor Temperatures

  10. August 2014 Averages • Torque & Current (Averages) • ADA CMD Torque: 0.733 Nm (0.859 Nm since Stage 3 Spin-up) • ADE B Motor Current: 0.765 A (0.902 A since Stage 3 Spin-up) • Temperatures (Averages) • Rotor A: 9.205DegC (10.232 C since Stage 3 Spin-up) • Rotor B: 8.740DegC (9.773 C since Stage 3 Spin-up) • ADE: 21.897DegC (22.612 C since Stage 3 Spin-up) • ADA STATOR: 9.712DegC (10.804 C since Stage 3 Spin-up) All values are within nominal tolerances. Consistently lowest averages since 2009.

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