Accession Number:

ADA516855

Title:

Analysis of Slewing and Attitude Determination Requirements for CTEx

Descriptive Note:

Master's thesis

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT

Personal Author(s):

• Starr, Jr., William J.

Report Date:

2010-03-01

Pagination or Media Count:

97.0

Abstract:

This thesis examines the slewing and attitude determination requirements for the Chromotomographic ExperimentCTEX, a chromotomographic-based hyperspectral imager, to be mounted on-board the Japanese Experiment Module JEM External Facility EF. The in-track slewing requirement is driven by the facts that CTEx has a very small field of view FOV and is required to collect 10 seconds of data for any given collection window. The need to slew in the cross-track direction is a product of the small FOV and targetcalibration site access. CTEx incorporates a two-axis slow-steering dwell mirror with a range of - 8 degrees and an accuracy of 10 arcseconds in each axis to slew the FOV. The inherent inaccuracy in the knowledge of the International Space Stations ISSattitude - 3 degrees poses significant complications in accurately pointing CTEx even with more accurate 0.3 degrees attitude information provided by the JEM. The desire is for CTEx to incorporate a star tracker with 1 arcsecond accuracy to determine attitude without reliance on outside sources.

Descriptors:

• *HYPERSPECTRAL IMAGERY
• *CHROMATOGRAPHY
• THESES
• CALIBRATION
• ONBOARD
• SPACE STATIONS
• ATTITUDE(INCLINATION)
• ACCURACY
• REQUIREMENTS
• SLEWING

Subject Categories:

• Physical Chemistry
• Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE