Midterm exam can be found by clicking the link: AEM_591_Exam_Orbit_Determination

This marks the end of the necessary background for orbit determination.

Previous lectures:

• L12 – Real Measurements 2
• L11 – Real Measurements
• L10 – Conceptual Example
• L9 – Conceptual Measurements
• L8 – Simulating Ideal Measurements
• L7 – Ideal and Conceptual Measurements
• L6 – Coordinate Systems and Time
• L5 – Perturbed Motion
• L4 – Two Body Problem
• L3 – Problem Solution and Review
• L2 – Orbital Mechanics Concepts
• L1 – Orbit Determination Concepts

Two way ranging and Doppler systems are summarized. Differenced measurements or “differencing,” is explained. For additional explanation on differencing see Penn State’s course for Geospatial and GNSS professionals (https://www.e-education.psu.edu/geog862/node/1727).

There was some difficulty with projecting the slides to the screen so they have been added after the lecture was recorded.

Sign up for updates here: OD Course Landing Page (Syllabus/Schedule)

Slides: L12 Slides – Real Measurements 2

Previous lectures:

• L11 – Real Measurements
• L10 – Conceptual Example
• L9 – Conceptual Measurements
• L8 – Simulating Ideal Measurements
• L7 – Ideal and Conceptual Measurements
• L6 – Coordinate Systems and Time
• L5 – Perturbed Motion
• L4 – Two Body Problem
• L3 – Problem Solution and Review
• L2 – Orbital Mechanics Concepts
• L1 – Orbit Determination Concepts

The environment and relativity effects on radio and optical communications are introduced.  One-way range measurement systems are introduced. GPS is provided as an example but it still applies to GLONASS and Galileo. Two-way range, Doppler, and differenced measurements are considered next.

Sign up for updates here: OD Course Landing Page (Syllabus/Schedule)

Slides: L11 Slides – Real Measurements

Previous lectures:

• L10 – Conceptual Example
• L9 – Conceptual Measurements
• L8 – Simulating Ideal Measurements
• L7 – Ideal and Conceptual Measurements
• L6 – Coordinate Systems and Time
• L5 – Perturbed Motion
• L4 – Two Body Problem
• L3 – Problem Solution and Review
• L2 – Orbital Mechanics Concepts
• L1 – Orbit Determination Concepts

Demonstrate understanding of orbital mechanics necessary to complete orbit determination course. In problem 1, position and velocity are converted between osculating elements and sub-satellite points. In problem 2, the receiver measurements confirm the node location varies over time. In problem 3 the equations of motion are numerically integrated for a GLONASS satellite for one day.

Sign up for updates here: OD Course Landing Page (Syllabus/Schedule)

GitHub: Repository for Code Used

Previous lectures:

• L8 – Simulating Ideal Measurements
• L7 – Ideal and Conceptual Measurements
• L6 – Coordinate Systems and Time
• L5 – Perturbed Motion
• L4 – Two Body Problem
• L3 – Problem Solution and Review
• L2 – Orbital Mechanics Concepts
• L1 – Orbit Determination Concepts