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Stationkeeping monte carlo simulation for the james webb space telescope
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Alberding, Cassandra M. Dichmann, Donald J. Yu, Wayne H. |
| Copyright Year | 2014 |
| Description | The James Webb Space Telescope (JWST) is scheduled to launch in 2018 into a Libration Point Orbit (LPO) around the Sun-Earth/Moon (SEM) L2 point, with a planned mission lifetime of 10.5 years after a six-month transfer to the mission orbit. This paper discusses our approach to Stationkeeping (SK) maneuver planning to determine an adequate SK delta-V budget. The SK maneuver planning for JWST is made challenging by two factors: JWST has a large Sunshield, and JWST will be repointed regularly producing significant changes in Solar Radiation Pressure (SRP). To accurately model SRP we employ the Solar Pressure and Drag (SPAD) tool, which uses ray tracing to accurately compute SRP force as a function of attitude. As an additional challenge, the future JWST observation schedule will not be known at the time of SK maneuver planning. Thus there will be significant variation in SRP between SK maneuvers, and the future variation in SRP is unknown. We have enhanced an earlier SK simulation to create a Monte Carlo simulation that incorporates random draws for uncertainties that affect the budget, including random draws of the observation schedule. Each SK maneuver is planned to optimize delta-V magnitude, subject to constraints on spacecraft pointing. We report the results of the Monte Carlo simulations and discuss possible improvements during flight operations to reduce the SK delta-V budget. |
| File Size | 382655 |
| Page Count | 21 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20140007519 |
| Archival Resource Key | ark:/13960/t3tt9mk76 |
| Language | English |
| Publisher Date | 2014-05-05 |
| Access Restriction | Open |
| Subject Keyword | Stationkeepting Monte Carlo Libration Point Orbit James Webb Space Telescope Simulation Stationkeeping Transfer Orbits Ray Tracing Flight Operations Libration Monte Carlo Method Radiation Pressure Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
