Sponsoring Org/Office Code: VIPER Office / OM3 Name of Forum: POIWG Date: 07/21/2014 Significant ISS Attitude Events 06/ /2015 Presenter: Jose Ruiz – VIPER Inputs from: Bob Juillerat– VIPER Lauren Hammond – VIPER Ivan Alanis - VIPER This document contains information that falls under the jurisdiction of the U.S. Department of Commerce Export Administration Regulations, 15 CFR , and is classified as EAR99. The Export, Re-export or re-transmission of this document or any of the data contained therein in violation of the Export Administration Regulations or other applicable U.S. export control laws and regulations is strictly prohibited.

Page No. 2 Classified as EAR99 – refer to title page Purpose/Agenda Purpose: Overview of significant ISS attitude events over the next 6 months. This is not a list inclusive of all planned visiting vehicle events Select the appropriate box below:  Request for Technical Concurrence  Request for Partial Implementation  Request for Full/Final Implementation X Information Only/Management Direction  Response to an Action Item Agenda: (list major topics of the presentation): Attitude overviews This presentation was previously reviewed/dispositioned at: MeetingDateOutcome/Direction

Page No. 3 Classified as EAR99 – refer to title page Background The data incorporated in this presentation is from the DEWG website. Please refer to the following website for the latest 6 month attitude plan: – Viperweb.jsc.nasa.gov/team_viper/web/DEWGTable.shtml The Current ISS Attitude Timeline can be found at: – Mod2.jsc.nasa.gov/di/di32/ADCO-Flight-Info/current.atl The data in this presentation is in the planning stages and is therefore subject to change, please confirm using the published ISS operational products

Page No. 4 Classified as EAR99 – refer to title page -XVV / -ZVV 55P Undock ISS will use an OPM to maneuver to –XVV on GMT 201 to set up for the 55P and 56P Russian events –Optimal Propellant Maneuvers are slow (approximately 90 minutes) highly prop efficient maneuvers –Does not use direct trajectories Maneuver to –ZVV –XLV on GMT 202 and remain there for roughly an hour for undock of 55P -ZVV -XVV

Page No. 5 Classified as EAR99 – refer to title page -XVV 56P Docking ISS will remain in –XVV +ZLV from GMT for the 56P docking and return to +XVV -XVV

Page No. 6 Classified as EAR99 – refer to title page + YVV SSU EVA The SSU EVA currently scheduled for GMT 233 will utilize at +YVV +ZLV attitude +YVV

Page No. 7 Classified as EAR99 – refer to title page +ZVV –XLV 38S undock On GMT 253 the ISS will maneuver to +ZVV –X nadir for the 38S undock +ZVV

Page No. 8 Classified as EAR99 – refer to title page -XVV 40S Docking ISS will remain in –XVV +ZLV from GMT for the 40S docking and return to +XVV -XVV

Page No. 9 Classified as EAR99 – refer to title page +ZVV –XLV 56P Undock On GMT 300 the ISS will maneuver to +ZVV –X nadir for the 56P undock +ZVV

Page No. 10 Classified as EAR99 – refer to title page -XVV 41S Docking ISS will remain in –XVV +ZLV from GMT for the 41S docking and return to +XVV The actual docking 41S docking will occur at –Yaw 194 degrees –Pitch 0 degrees –Roll 14 degrees -XVV

Page No. 11 Classified as EAR99 – refer to title page Solar Attitude Bias ISS will remain in the SOLAR Attitude Bias from GMT 332 – 341 ISS SOLAR Attitude –Yaw degrees –Pitch -2.3 degrees –Roll -0.1 degrees

BACKUP 12

Page No. 13 Classified as EAR99 – refer to title page +XVV +Z-nadir TEA Majority of the time ISS is in +XVV +Z-Nadir attitude under CMG control with the arrays in auto-track which is known as “quiescent” operations TEA (Torque Equilibrium Attitude) is a particular stable attitude which balances all torques on the ISS The following TEA ranges are expected from now (2014) up until the attachment of the Russian Science Power Platform (SPM) currently scheduled for 2018 –Roll [-2° to +2°] –Pitch [-14° to +2°] –Yaw [-10° to +2°]

Page No. 14 Classified as EAR99 – refer to title page +XVV +Z-Nadir Dynamic Events Most array feathering events are also performed in +XVV –Reboosts, Russian EVAs, thruster tests, and some Russian dockings –All grapple vehicles capture and release Some array feathering events are at TEA and some are slightly off TEA –Most are within 5 degrees in all axis of (0, 0, 0) –Almost always inside the approved attitude envelopes