STEREO Science Team Meeting STEREO May 2 2005

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STEREO Science Team Meeting STEREO May 2, 2005 Presented by Edward Reynolds APL STEREO

STEREO Science Team Meeting STEREO May 2, 2005 Presented by Edward Reynolds APL STEREO Project Manager STEREO - Solar Terrestrial Relations Observatory Mission

General Status STEREO • Observatory Integration status – Core spacecraft integration is nearly complete

General Status STEREO • Observatory Integration status – Core spacecraft integration is nearly complete – Both spacecraft are ready for instrument integration • Mission Operations Center – Facility complete and equipment operational – MOC facility used for Mission Simulations and DSN tests – POC facility ready for instrument teams • Four Mission Simulations performed on each spacecraft • Five Dress rehearsals performed using equipment and personnel being planned. STEREO - Solar Terrestrial Relations Observatory Mission (ELR 4/29/05) - 2

Spacecraft Stacking Operations STEREO - Solar Terrestrial Relations Observatory Mission (ELR 4/29/05) - 3

Spacecraft Stacking Operations STEREO - Solar Terrestrial Relations Observatory Mission (ELR 4/29/05) - 3

Spacecraft Stack – Dynamics Load Testing STEREO - Solar Terrestrial Relations Observatory Mission (ELR

Spacecraft Stack – Dynamics Load Testing STEREO - Solar Terrestrial Relations Observatory Mission (ELR 4/29/05) - 4

Integration Status STEREO • Spacecraft integration at APL – Both spacecraft integrated within the

Integration Status STEREO • Spacecraft integration at APL – Both spacecraft integrated within the same room – Facility controlled for contamination, ESD, and security – Spacecraft to remain at APL until after stacked vibration testing • Most environmental testing to occur at GSFC – Acoustics, thermal vacuum, shock, ESD, mass properties • Launch activities will occur over a 11 -week period – While at GSFC and Launch site, spacecraft will be controlled from MOC at APL – Project will follow security procedures of KSC/CCAFS – Background checks need to be submitted in a timely manner – Visitors and guests will be escorted when required – Once spacecraft is fueled, access around it will be limited to essential personnel STEREO - Solar Terrestrial Relations Observatory Mission (ELR 4/29/05) - 5

STEREO I&T Flow STEREO - Solar Terrestrial Relations Observatory Mission (ELR 4/29/05) - 6

STEREO I&T Flow STEREO - Solar Terrestrial Relations Observatory Mission (ELR 4/29/05) - 6

STEREO Recent Accomplishments STEREO - Hi-Shear under contract for Pyro Sep-Nuts (replaces STARSYS Qwk.

STEREO Recent Accomplishments STEREO - Hi-Shear under contract for Pyro Sep-Nuts (replaces STARSYS Qwk. Nuts) DSN/CTT Testing Completed on Spacecraft A & B - - Power, RF, G&C subsystems integrated on Spacecraft A & B Propulsion system integrated and leak tested on Spacecraft A & B IEM B cold lock-up root cause identified and mitigated, - - IEM B integrated on Spacecraft Mission Sim #1 on both Spacecraft A & B - - Performance and Operations Launch, Separation, Detumble, 1 st contact, delta-V and momentum dumps, EA mode IMPACT IDPU & Boom Integrated on Spacecraft A Command Loss Timer Test (72 -hour) Spacecraft A 85% of thermal blanketing complete Flight batteries ready for integration Solar arrays delivered and undergoing flash illumination testing HGA assemblies completing TV chamber testing (deployments, actuations) STEREO - Solar Terrestrial Relations Observatory Mission (ELR 4/29/05) - 7

Photo Gallery STEREO - Solar Terrestrial Relations Observatory Mission (ELR 4/29/05) - 8

Photo Gallery STEREO - Solar Terrestrial Relations Observatory Mission (ELR 4/29/05) - 8

Educational Video Production STEREO - Solar Terrestrial Relations Observatory Mission (ELR 4/29/05) - 9

Educational Video Production STEREO - Solar Terrestrial Relations Observatory Mission (ELR 4/29/05) - 9

Mission Orbit STEREO 4 yr. 5 yr. 3 yr. 2 yr. Ahead @ +22

Mission Orbit STEREO 4 yr. 5 yr. 3 yr. 2 yr. Ahead @ +22 /year 1 yr. Sun Earth Ahead Earth 1 yr. Behind @ -22 /year 2 yr. Behind 5 yr. Heliocentric Inertial Coordinates (Ecliptic Plane Projection) STEREO - Solar Terrestrial Relations Observatory Mission 4 yr. 3 yr. (ELR 4/29/05) - 10

Phasing Orbit STEREO Mission Timeline Launch: Feb. 11 – 24, 2006 ~4: 00 am

Phasing Orbit STEREO Mission Timeline Launch: Feb. 11 – 24, 2006 ~4: 00 am EST S 1: April 8, 2006 S 2: May 16, 2006 +22°/yr Ahead S 2 To Sun A 1 Lunar Orbit A 3 A 4 A 2 A 5 S 1 • • 4. 5 Revolutions in Phasing Orbit First lunar swingby, S 1 • Second lunar swingby, S 2 – – Behind escapes Ahead spacecraft enters 1 month ‘outer loop’ – Ahead escapes STEREO - Solar Terrestrial Relations Observatory Mission -22°/yr Behind (ELR 4/29/05) - 11

Day 1 (11 -Feb) Phasing Orbit Schematic STEREO Key Event ID Elapsed Time (days)/Distance

Day 1 (11 -Feb) Phasing Orbit Schematic STEREO Key Event ID Elapsed Time (days)/Distance (Re) = Planned V A 5 74. 3 / 137 = TCM V Behind A 1 7. 2 / 77 A 2 21. 8 / 77 A 3 34. 7 / 65 A 4 46. 7 / 65 S 1 55. 8 TIP 42 min / h=178 km C 3 = -1. 6 km 2/s 2 P 1 14. 5 / 1. 32 P 2 29. 1 / 1. 58 P 3 40. 4 / 1. 80 P 4 52. 0 / 2. 21 S 2 94. 5 Ahead Summary Min. Perigee Altitude = 2, 036 km @ P 1 Lunar Flyby Radius: S 1: Ahead = 12, 361 km, Behind = 8, 105 km S 2: Ahead = 16, 214 km STEREO - Solar Terrestrial Relations Observatory Mission (ELR 4/29/05) - 12

Spacecraft Mission Operations Center Facility STEREO MOC Space HIL A HIL B Assessment Workstations

Spacecraft Mission Operations Center Facility STEREO MOC Space HIL A HIL B Assessment Workstations B Primary Backup A Primary Backup Command Pit STEREO - Solar Terrestrial Relations Observatory Mission Engineering Display Workstations (ELR 4/29/05) - 13

Spacecraft Mission Operations Center Facility – At APL STEREO POC Space STEREO - Solar

Spacecraft Mission Operations Center Facility – At APL STEREO POC Space STEREO - Solar Terrestrial Relations Observatory Mission (ELR 4/29/05) - 14