Kamel, Ahmed (Kamel)

Improved Instrument Misalignment Equations for Image Navigation and Registration (INR)

Scheduled for presentation during the Regular Session "Estimation 1" (WeA3), Wednesday, April 3, 2019, 15:00−15:30, BL281.2

5th CEAS Conference on Guidance, Navigation and Control, April 3-5, 2019, Milano, Italy

This information is tentative and subject to change. Compiled on April 18, 2024

Abstract

Improved misalignment equations are presented for instruments with single scanning mirror and instruments with two scanning mirrors. The improved misalignment equations are derived using Snell’s law and Householder transformation. The nominal optical path without misalignments shows that focal plane module reflected image by single mirror rotates by the north-south angle while it does not rotate for two mirrors. The optical path with misalignment of focal plane module to scanner mirror and misalignments within scanner assembly show that the state vector can be represented by six angles for single mirror instruments and by four angles for two mirror instruments. The state vector most significant improvement represents the effect of scan mirror axes orthogonality misalignment angle due to thermal variation and measurement errors. This improvement is shown to be in the north-south direction and equals to the orthogonality misalignment angle multiplied by the tangent of the east-west scan angle.