The doctoral program in atmospheric science requires a minimum of sixty hours: 30 hours of course work and 30 hours of dissertation research. Programs are planned with the advisor and then approved by the student's dissertation committee. Such approval must be secured at latest by the second month of the second semester of study. Changes in the approved program can be initiated by the student at any time but must be approved by the advisor and the committee. Program sheets are available in the department office and must be filed before the comprehensive examination can be scheduled.