This course provides a foundation for understanding the physical principles of remote sensing of the atmosphere and oceans. The course is designed as a collection of lectures and computer modeling laboratories. The lectures focus on the fundamentals of the interactions between electromagnetic radiation and atmospheric gases, aerosols and clouds, and ocean surfaces, covering the spectrum from the ultraviolet through the microwave. The labs provide hands-on experience in using remote sensing data for various applications in atmospheric and oceanic sciences. Topics to be covered include aerosol and cloud property retrievals, ozone and air pollution characterization, vertical temperature and humidity profile retrievals, sea ice characterization, and retrievals of ocean color and sea surface temperature. The main goal of the course is to provide a broad conceptual framework for physical understanding the methodology and applications of remote sensing.